How long is the flight from San Diego to Region of Ontario?

United Airlines, Air Canada, and Delta can get you from San Diego to Region of Ontario in just under 9h 53m. Your travel time can differ by up to 55m. San Diego and Region of Ontario are separated by a distance of 3798 km. Both multi-stop and direct flights can be found to your destination and back.

What are the cheapest airlines to fly from San Diego to Region of Ontario one-way?

To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at C$ 197. United Airlines flights start at C$ 203 while deals on Air Canada start at C$ 262 one-way.

In terms of precipitation, rainfall in Region of Ontario ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

What are the most popular routes from San Diego to Region of Ontario?

The most popular route from San Diego to Region of Ontario is San Diego - Toronto Pearson Intl. You may also consider San Diego - Montreal Pierre Elliott Trudeau Intl or San Diego - Toronto Island.

What are the cheapest flights from San Diego to Region of Ontario?

While on average a flight from San Diego to Region of Ontario is generally C$ 832, our data shows the cheapest flight currently is C$ 276. When looking at the most popular route, (San Diego - Toronto Pearson Intl), you can expect to pay C$ 428 for that flight.

What are the most reliable airlines from San Diego to Region of Ontario?

Consider Air Canada Rouge (69%), United Airlines (67%) or Air Canada (66%) when booking your flight. These represent the most reliable airlines when flying from San Diego to Region of Ontario.

What are the most popular airlines that fly from San Diego to Region of Ontario?

When booking a flight from San Diego to Region of Ontario, you may want to consider flying on Air Canada, Delta or United Airlines as they are the most popular for this route.

What airport do you fly from for flights from San Diego to Ontario?

Most people fly from San Diego (SAN) if they book a flight from San Diego to Ontario. San Diego is conveniently located just 4.2 km from San Diego’s city centre.

Can I find deals for flights from San Diego to Ontario that include hotel bookings?

Yes. In addition to deals on San Diego to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from San Diego to Ontario?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Ontario.

Can I find deals for business class flights from San Diego to Ontario?

Yes. Cheapflights offers flight deals from San Diego to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 168+ Cheap Flights from San Diego to Ontario

Cheap flight deals from San Diego to Ontario

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from San Diego to Ontario
Explore the most affordable flight options available from San Diego to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2026.

Tue 29/97:04 p.m. -

2 stops21h 16m

Sat 3/107:20 a.m. -

1 stop9h 50m

Deal found 9/9C$ 396

Thu 1/106:54 p.m. -

2 stops31h 41m

Tue 6/107:20 a.m. -

1 stop9h 50m

Deal found 11/9C$ 403

Tue 29/97:00 a.m. -

Nonstop5h 27m

Tue 6/108:30 a.m. -

1 stop10h 42m

Deal found 9/9C$ 417

Sat 17/102:01 p.m. -

2 stops36h 34m

Fri 23/107:20 a.m. -

1 stop9h 50m

Deal found 9/9C$ 423

Wed 30/93:30 p.m. -

2 stops18h 00m

Sat 3/107:20 a.m. -

1 stop9h 50m

Deal found 11/9C$ 429

Thu 1/106:54 p.m. -

2 stops21h 26m

Wed 7/108:15 p.m. -

1 stop20h 55m

Deal found 9/9C$ 435

Mon 5/105:05 p.m. -

1 stop9h 53m

Tue 13/106:55 a.m. -

1 stop12h 05m

Deal found 9/9C$ 441

Tue 29/912:30 p.m. -

1 stop9h 23m

Sat 3/105:00 a.m. -

1 stop14h 12m

Deal found 9/9C$ 450

Fri 16/103:30 p.m. -

1 stop12h 35m

Tue 20/107:15 a.m. -

1 stop9h 55m

Deal found 9/9C$ 452

Mon 5/107:00 a.m. -

Nonstop5h 27m

Sun 11/107:20 a.m. -

1 stop11h 52m

Deal found 11/9C$ 460

Tue 6/103:30 p.m. -

1 stop12h 35m

Thu 22/107:15 a.m. -

1 stop9h 55m

Deal found 11/9C$ 464

Fri 2/106:54 p.m. -

2 stops31h 41m

Tue 6/107:20 a.m. -

1 stop9h 50m

Deal found 11/9C$ 470

Best flights from San Diego to Ontario
Discover carefully curated flight deals from San Diego to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 12 September 2026.

Tue 20/106:28 p.m. -

1 stop10h 48m

Wed 21/1011:23 a.m. -

1 stop11h 20m

Deal found 8/9C$ 478

Mon 5/105:05 p.m. -

1 stop9h 53m

Fri 9/102:50 p.m. -

1 stop8h 46m

Deal found 11/9C$ 503

Mon 5/106:50 p.m. -

2 stops11h 21m

Tue 13/106:55 a.m. -

1 stop12h 05m

Deal found 9/9C$ 508

Fri 13/1110:10 p.m. -

1 stop10h 42m

Mon 16/116:00 a.m. -

1 stop11h 29m

Deal found 8/9C$ 518

Wed 28/102:30 p.m. -

1 stop21h 55m

Sun 1/113:25 p.m. -

1 stop24h 15m

Deal found 9/9C$ 569

Wed 21/101:10 p.m. -

2 stops23h 35m

Tue 27/105:15 p.m. -

2 stops18h 26m

Deal found 8/9C$ 883

Fri 2/107:41 p.m. -

2 stops11h 59m

Mon 5/107:30 a.m. -

1 stop11h 42m

Deal found 9/9C$ 513

Mon 5/1010:20 p.m. -

1 stop14h 50m

Fri 9/106:35 p.m. -

1 stop17h 08m

Deal found 12/9C$ 520

Mon 5/1010:30 p.m. -

1 stop10h 08m

Fri 9/107:00 a.m. -

1 stop12h 25m

Deal found 11/9C$ 520

Sat 3/103:56 p.m. -

1 stop13h 20m

Sat 10/106:35 p.m. -

1 stop8h 56m

Deal found 11/9C$ 520

Tue 20/103:30 p.m. -

1 stop22h 45m

Thu 29/104:25 p.m. -

1 stop24h 15m

Deal found 11/9C$ 574

Mon 5/106:50 p.m. -

2 stops12h 06m

Fri 9/102:50 p.m. -

1 stop8h 46m

Deal found 11/9C$ 522

Sat 24/104:50 p.m. -

2 stops12h 47m

Sat 31/103:25 p.m. -

2 stops10h 15m

Deal found 9/9C$ 580

Fri 16/1010:30 p.m. -

1 stop9h 10m

Tue 20/106:35 p.m. -

1 stop18h 42m

Deal found 11/9C$ 520

Tue 6/105:05 p.m. -

2 stops21h 38m

Sat 10/108:20 p.m. -

2 stops22h 52m

Deal found 9/9C$ 608

Sat 17/109:45 a.m. -

2 stops21h 11m

Tue 20/105:20 p.m. -

1 stop8h 21m

Deal found 6/9C$ 520

Mon 26/102:30 p.m. -

1 stop21h 55m

Mon 2/118:00 a.m. -

2 stops29h 11m

Deal found 11/9C$ 618

Thu 1/109:45 a.m. -

2 stops21h 11m

Wed 7/105:20 p.m. -

1 stop8h 21m

Deal found 8/9C$ 525

Tue 20/103:30 p.m. -

1 stop22h 45m

Tue 27/104:25 p.m. -

1 stop24h 15m

Deal found 7/9C$ 741

Tue 29/96:15 a.m. -

2 stops14h 39m

Wed 30/96:25 a.m. -

1 stop8h 00m

Deal found 11/9C$ 525

Tue 20/109:20 a.m. -

1 stop27h 25m

Sat 24/104:55 p.m. -

1 stop9h 31m

Deal found 7/9C$ 907

Wed 30/910:20 p.m. -

1 stop7h 51m

Sun 4/106:00 a.m. -

2 stops14h 46m

Deal found 10/9C$ 532

Wed 28/107:00 a.m. -

1 stop11h 06m

Sun 1/114:35 p.m. -

1 stop9h 08m

Deal found 9/9C$ 758

Sun 27/98:06 p.m. -

2 stops16h 39m

Wed 30/94:55 p.m. -

2 stops20h 13m

Deal found 8/9C$ 932

Sat 10/109:20 p.m. -

1 stop8h 51m

Fri 16/105:20 p.m. -

2 stops21h 15m

Deal found 9/9C$ 532

Sun 18/103:30 p.m. -

1 stop22h 45m

Thu 22/106:10 p.m. -

1 stop23h 00m

Deal found 11/9C$ 914

Sun 4/107:00 a.m. -

1 stop9h 50m

Tue 6/1012:20 p.m. -

2 stops11h 16m

Deal found 10/9C$ 928

Wed 7/106:00 p.m. -

2 stops14h 42m

Wed 14/101:35 p.m. -

1 stop11h 00m

Deal found 9/9C$ 774

Wed 23/910:25 p.m. -

1 stop7h 46m

Wed 30/96:25 a.m. -

2 stops14h 01m

Deal found 9/9C$ 532

Mon 1/25:46 p.m. -

2 stops19h 19m

Wed 10/25:15 p.m. -

2 stops20h 04m

Deal found 8/9C$ 946

Find flight deals from San Diego to Ontario

Round-trip from	C$ 396
One-way from	C$ 168
Popular in	October
Cheapest in	January
Average price	C$ 816
Good round-trip deal	C$ 948 or less
Good one-way deal	C$ 413 or less

WestJet
29/9-3/10
3 total stops
31h 06m total
San Diego to Ontario

Search Deals

Air Canada
5/10-31/12
Nonstop
5h 27m total
San Diego to Ontario

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (C$ 108 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 23 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Price to beat on a round-trip flight from San Diego to Ontario.

Search Deals

Price to beat on a one-way flight from San Diego to Ontario.

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San DiegoMontreal

SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl

SANYUL

San Diego

Sat 3/10

6:40 a.m.-5:30 p.m.

1 stop7h 50m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 218

San DiegoMontreal

SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl

SANYUL

San Diego

Fri 16/10

7:41 p.m.-8:16 a.m.

1 stop9h 35m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 218

San DiegoMontreal

SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl

SANYUL

San Diego

Sat 17/10

7:41 p.m.-8:16 a.m.

1 stop9h 35m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 218

San DiegoMontreal

SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl

SANYUL

San Diego

Thu 5/11

10:20 p.m.-1:28 p.m.

1 stop12h 08m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 219

San DiegoMontreal

SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl

SANYUL

San Diego

Sun 18/10

7:41 p.m.-8:16 a.m.

1 stop9h 35m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 219

San DiegoMontreal

SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl

SANYUL

San Diego

Wed 30/9

12:40 p.m.-8:16 a.m.

1 stop16h 36m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 219

San DiegoMontreal

SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl

SANYUL

San Diego

Thu 15/10

12:40 p.m.-8:16 a.m.

1 stop16h 36m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 219

San DiegoMontreal

SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl

SANYUL

San Diego

Mon 19/10

6:28 p.m.-8:16 a.m.

1 stop10h 48m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 219

San DiegoMontreal

SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl

SANYUL

San Diego

Sat 7/11

9:45 p.m.-3:16 p.m.

1 stop14h 31m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 219

San DiegoOttawa

SAN San Diego - YOW Ottawa

SANYOW

San Diego

Sat 26/9

10:20 p.m.-9:11 a.m.

1 stop7h 51m

Ottawa

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 219

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from San Diego to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from San Diego with our price prediction graph.

SAN-YUL

SAN-YOW

SAN-YHM

SAN-YYZ

SAN-YXU

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Diego to Ontario

SAN-CAON

SAN-YUL

SAN-YOW

SAN-YHM

SAN-YYZ

What is the cheapest month to book a flight from San Diego to Region of Ontario?

Currently, March is the cheapest month in which you can book a flight from San Diego to Region of Ontario (average of C$ 601). Flying from San Diego to Region of Ontario in August is currently the most expensive (average of C$ 931). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SAN to ON?

When flying from San Diego to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from San Diego to Region of Ontario

The most flights from SAN to CAON are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

How much does it cost to fly round-trip from San Diego to Region of Ontario?

Airfare is below average for this route at the moment.

San Diego to Region of Ontario flights typically cost between C$ 664 and C$ 1,129 in October.
The cheapest round-trip price found within the last 5 days was C$ 490 on WestJet (28 Oct-2 Nov).

How far ahead should I book a flight from San Diego to Region of Ontario?

The price you pay for your flight from San Diego to Region of Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 75 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown Delta,United Airlines, andAir Canada from San Diego to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

7.8

Good

8,567 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

7.8

Good

8,567 reviews

Delta

7.8

Good

8,567 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

10,207 reviews

Delta

7.8

Good

8,567 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air Canada

7.1

Good

11,620 reviews

Delta

7.8

Good

8,567 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What airport do you fly from for flights from San Diego to Ontario?
Most people fly from San Diego (SAN) if they book a flight from San Diego to Ontario. San Diego is conveniently located just 4.2 km from San Diego’s city centre.
How long is the flight from San Diego to Region of Ontario?
United Airlines, Air Canada, and Delta can get you from San Diego to Region of Ontario in just under 9h 53m. Your travel time can differ by up to 55m. San Diego and Region of Ontario are separated by a distance of 3798 km. Both multi-stop and direct flights can be found to your destination and back.
What are the cheapest airlines to fly from San Diego to Region of Ontario one-way?
To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at C$ 197. United Airlines flights start at C$ 203 while deals on Air Canada start at C$ 262 one-way.
What are the most popular routes from San Diego to Region of Ontario?
The most popular route from San Diego to Region of Ontario is San Diego - Toronto Pearson Intl. You may also consider San Diego - Montreal Pierre Elliott Trudeau Intl or San Diego - Toronto Island.
What are the most reliable airlines from San Diego to Region of Ontario?
Consider Air Canada Rouge (69%), United Airlines (67%) or Air Canada (66%) when booking your flight. These represent the most reliable airlines when flying from San Diego to Region of Ontario.
What are the cheapest flights from San Diego to Region of Ontario?
While on average a flight from San Diego to Region of Ontario is generally C$ 832, our data shows the cheapest flight currently is C$ 276. When looking at the most popular route, (San Diego - Toronto Pearson Intl), you can expect to pay C$ 428 for that flight.
Can I find deals for flights from San Diego to Ontario that include hotel bookings?
Yes. In addition to deals on San Diego to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from San Diego to Ontario?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Ontario.
Can I find deals for business class flights from San Diego to Ontario?
Yes. Cheapflights offers flight deals from San Diego to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from San Diego to Region of Ontario?
Currently, March is the cheapest month in which you can book a flight from San Diego to Region of Ontario (average of C$ 601). Flying from San Diego to Region of Ontario in August is currently the most expensive (average of C$ 931). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 3 airlines flying from San Diego to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Delta	CheapestC$ 331	AverageC$ 865	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Air Canada	CheapestC$ 430	AverageC$ 820	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	CheapestC$ 446	AverageC$ 940	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from San Diego to Ontario?

Cheapflights makes it easy to find San Diego to Ontario flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from San Diego to Ontario?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from San Diego.

Can Cheapflights find flights from San Diego to Ontario with no change fees?

Yes, we can. To see specific flights from San Diego to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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Not ready to book yet? You can track prices for flights from San Diego to Ontario on Cheapflights with our Price Alert feature and get notified when better prices are available.

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Cheap flights from San Diego to Ontario from C$ 168

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from San Diego to Ontario

Cheapest flights from San Diego to OntarioExplore the most affordable flight options available from San Diego to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2026.

Explore the most affordable flight options available from San Diego to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2026.

Best flights from San Diego to OntarioDiscover carefully curated flight deals from San Diego to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 12 September 2026.

Discover carefully curated flight deals from San Diego to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 12 September 2026.

Direct flights from San Diego to OntarioExplore direct flight options from San Diego to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 September 2026.

Explore direct flight options from San Diego to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 September 2026.

Last-minute flights from San Diego to OntarioDiscover last-minute flight deals from San Diego to Ontario. Data last updated 12 September 2026 and is based on user searches.

Discover last-minute flight deals from San Diego to Ontario. Data last updated 12 September 2026 and is based on user searches.

One-way flights from San Diego to OntarioSearch for one-way flight options from San Diego to Ontario. Find affordable one-way fares based on user searches. Data last updated 12 September 2026.

Search for one-way flight options from San Diego to Ontario. Find affordable one-way fares based on user searches. Data last updated 12 September 2026.

Find flight deals from San Diego to Ontario

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Diego to Ontario that are best for you.

Best time to book a flight from San Diego to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from San Diego with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from San Diego to Region of Ontario?

What is the cheapest time of day to fly from SAN to ON?

Find hourly flight availability from San Diego to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 September 2026.

When flying from San Diego to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from San Diego to Region of Ontario

Explore weekly flight availability from San Diego to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 12 September 2026.

The most flights from SAN to CAON are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

How much does it cost to fly round-trip from San Diego to Region of Ontario?

Airfare is below average for this route at the moment.

San Diego to Region of Ontario flights typically cost between C$ 664 and C$ 1,129 in October.The cheapest round-trip price found within the last 5 days was C$ 490 on WestJet (28 Oct-2 Nov).

How far ahead should I book a flight from San Diego to Region of Ontario?

The price you pay for your flight from San Diego to Region of Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 75 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown Delta,United Airlines, andAir Canada from San Diego to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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What are the cheapest airlines to fly from San Diego to Region of Ontario one-way?

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What are the cheapest flights from San Diego to Region of Ontario?

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San Diego and Ontario flights

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Cheapest flights from San Diego to Ontario
Explore the most affordable flight options available from San Diego to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2026.

Best flights from San Diego to Ontario
Discover carefully curated flight deals from San Diego to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 12 September 2026.

Direct flights from San Diego to Ontario
Explore direct flight options from San Diego to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 September 2026.

Last-minute flights from San Diego to Ontario
Discover last-minute flight deals from San Diego to Ontario. Data last updated 12 September 2026 and is based on user searches.

One-way flights from San Diego to Ontario
Search for one-way flight options from San Diego to Ontario. Find affordable one-way fares based on user searches. Data last updated 12 September 2026.

San Diego to Region of Ontario flights typically cost between C$ 664 and C$ 1,129 in October.
The cheapest round-trip price found within the last 5 days was C$ 490 on WestJet (28 Oct-2 Nov).