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

Departing from Region of Ontario to San Diego will take you 8h 46m. The distance between Region of Ontario and San Diego is about 3798 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at C$ 233. American Airlines flights start at C$ 246 while deals on Air Canada start at C$ 257 one-way.

In terms of precipitation, rainfall in San Diego ranges from 0.0 - 58.0 mm per month. February is typically the wettest month, when rainfall can reach 58.0 mm. July is typically the driest time to visit San Diego when rainfall is around 0.0 mm.

If weather is an important factor for your trip to San Diego, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 14.0 C).

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

Most travellers choose Toronto Pearson Intl - San Diego, Montreal Pierre Elliott Trudeau Intl - San Diego or Toronto Island - San Diego when deciding on the best route from Region of Ontario to San Diego.

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

While on average a flight from Region of Ontario to San Diego is generally C$ 686, our data shows the cheapest flight currently is C$ 387. When looking at the most popular route, (Toronto Pearson Intl - San Diego), you can expect to pay C$ 478 for that flight.

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

The top 3 most reliable airlines when flying from Region of Ontario to San Diego are Air Canada (80%), United Airlines (79%) and Air Canada Rouge (72%).

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

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

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

San Diego (SAN), located 4.2 km from the city centre, is the airport you fly into when you book flights from Ontario to San Diego.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Ontario to San Diego 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$ 214+ Cheap Flights from Ontario to San Diego

Cheap flight deals from Ontario to San Diego

Enter your travel dates to find the best prices.

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One-way

Cheapest flights from Ontario to San Diego
Explore the most affordable flight options available from Ontario to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2026.

Sat 10/102:50 p.m. -

1 stop8h 46m

Sat 17/104:50 p.m. -

1 stop10h 08m

Deal found 6/9C$ 396

Sat 3/107:20 a.m. -

1 stop9h 50m

Tue 6/103:30 p.m. -

1 stop20h 50m

Deal found 8/9C$ 418

Thu 12/116:15 a.m. -

2 stops17h 09m

Mon 16/114:45 p.m. -

2 stops18h 24m

Deal found 5/9C$ 419

Sat 17/106:00 a.m. -

2 stops12h 54m

Sat 24/108:00 a.m. -

2 stops12h 54m

Deal found 5/9C$ 427

Sat 3/106:00 a.m. -

2 stops12h 54m

Wed 7/102:24 p.m. -

2 stops16h 32m

Deal found 7/9C$ 432

Thu 3/124:15 p.m. -

1 stop23h 25m

Mon 7/121:30 p.m. -

1 stop22h 00m

Deal found 8/9C$ 445

Mon 26/106:10 a.m. -

1 stop10h 30m

Sat 31/102:30 p.m. -

1 stop31h 31m

Deal found 8/9C$ 449

Wed 30/99:45 a.m. -

1 stop9h 04m

Wed 30/96:28 p.m. -

1 stop10h 48m

Deal found 6/9C$ 459

Sun 11/106:45 a.m. -

2 stops34h 25m

Sun 18/103:30 p.m. -

1 stop12h 35m

Deal found 6/9C$ 460

Thu 1/105:45 p.m. -

Nonstop5h 51m

Sun 11/107:00 a.m. -

Nonstop5h 27m

Deal found 5/9C$ 462

Fri 2/109:45 a.m. -

1 stop15h 56m

Wed 14/106:50 p.m. -

2 stops15h 19m

Deal found 5/9C$ 463

Fri 23/107:20 a.m. -

1 stop9h 50m

Fri 30/102:30 p.m. -

1 stop31h 30m

Deal found 8/9C$ 465

Best flights from Ontario to San Diego
Discover carefully curated flight deals from Ontario to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Sat 10/102:50 p.m. -

1 stop8h 46m

Sat 17/104:50 p.m. -

1 stop10h 08m

Deal found 6/9C$ 396

Thu 12/116:15 a.m. -

2 stops17h 09m

Mon 16/119:40 p.m. -

1 stop12h 31m

Deal found 5/9C$ 419

Sat 3/108:40 p.m. -

1 stop20h 30m

Sun 18/103:30 p.m. -

1 stop25h 20m

Deal found 6/9C$ 517

Mon 9/114:50 p.m. -

1 stop8h 20m

Mon 16/117:20 a.m. -

2 stops13h 10m

Deal found 9/9C$ 523

Thu 15/106:10 p.m. -

1 stop23h 00m

Sun 18/103:30 p.m. -

2 stops20h 35m

Deal found 6/9C$ 618

Sat 7/115:15 p.m. -

2 stops17h 47m

Sat 14/117:03 p.m. -

2 stops18h 02m

Deal found 6/9C$ 783

Sat 17/106:25 a.m. -

1 stop15h 15m

Sat 24/106:40 a.m. -

1 stop12h 02m

Deal found 5/9C$ 427

Sat 3/1010:37 a.m. -

1 stop11h 03m

Wed 7/102:24 p.m. -

2 stops16h 32m

Deal found 7/9C$ 432

Mon 23/115:30 a.m. -

2 stops12h 42m

Thu 26/1110:30 p.m. -

2 stops13h 17m

Deal found 5/9C$ 521

Sat 24/106:00 a.m. -

2 stops10h 44m

Fri 30/106:30 p.m. -

2 stops17h 37m

Deal found 9/9C$ 433

Thu 4/23:25 p.m. -

1 stop24h 15m

Sat 13/21:30 p.m. -

1 stop21h 55m

Deal found 5/9C$ 591

Mon 11/14:55 p.m. -

1 stop7h 57m

Sat 16/110:40 p.m. -

1 stop11h 59m

Deal found 6/9C$ 593

Fri 2/106:10 p.m. -

1 stop23h 00m

Tue 6/103:30 p.m. -

2 stops20h 35m

Deal found 8/9C$ 622

Wed 30/99:45 a.m. -

2 stops10h 41m

Wed 30/97:41 p.m. -

1 stop9h 35m

Deal found 6/9C$ 473

Sun 8/116:10 a.m. -

1 stop18h 16m

Thu 12/115:15 p.m. -

1 stop10h 37m

Deal found 6/9C$ 638

Tue 22/98:30 a.m. -

2 stops13h 00m

Fri 25/94:55 p.m. -

1 stop14h 12m

Deal found 5/9C$ 658

Mon 9/115:50 p.m. -

1 stop18h 20m

Mon 16/117:41 p.m. -

2 stops18h 26m

Deal found 5/9C$ 524

Mon 12/108:40 p.m. -

1 stop20h 30m

Sun 18/103:30 p.m. -

1 stop25h 20m

Deal found 8/9C$ 721

Wed 7/1010:45 a.m. -

1 stop9h 20m

Tue 13/101:10 p.m. -

Nonstop5h 00m

Deal found 9/9C$ 696

Fri 9/106:10 p.m. -

1 stop7h 02m

Wed 14/106:57 p.m. -

2 stops10h 52m

Deal found 6/9C$ 773

Tue 15/129:25 a.m. -

2 stops13h 43m

Tue 15/1210:30 p.m. -

1 stop15h 37m

Deal found 7/9C$ 529

Mon 28/96:10 p.m. -

1 stop23h 00m

Mon 5/103:30 p.m. -

1 stop22h 45m

Deal found 10/9C$ 757

Sat 12/125:55 p.m. -

2 stops21h 45m

Wed 30/121:30 p.m. -

1 stop21h 55m

Deal found 6/9C$ 767

Mon 23/115:30 a.m. -

2 stops10h 26m

Thu 26/117:41 p.m. -

3 stops16h 06m

Deal found 6/9C$ 532

Thu 19/1112:20 p.m. -

2 stops13h 20m

Sun 22/1110:30 p.m. -

1 stop15h 12m

Deal found 7/9C$ 747

Fri 20/1112:15 p.m. -

2 stops12h 17m

Fri 4/128:40 a.m. -

1 stop10h 04m

Deal found 6/9C$ 772

Tue 17/117:00 a.m. -

2 stops11h 54m

Wed 2/126:20 a.m. -

2 stops9h 37m

Deal found 9/9C$ 538

Sun 11/108:40 p.m. -

1 stop20h 30m

Tue 20/103:30 p.m. -

1 stop25h 20m

Deal found 9/9C$ 794

Thu 12/1112:20 p.m. -

2 stops13h 20m

Wed 18/1110:30 p.m. -

2 stops12h 51m

Deal found 9/9C$ 747

Thu 12/113:25 p.m. -

1 stop24h 15m

Wed 18/111:30 p.m. -

1 stop21h 55m

Deal found 8/9C$ 794

Find flight deals from Ontario to San Diego

Round-trip from	C$ 396
One-way from	C$ 214
Popular in	August
Cheapest in	April
Average price	C$ 782
Good round-trip deal	C$ 764 or less
Good one-way deal	C$ 417 or less

Air Canada
10/10-17/10
2 total stops
18h 54m total
Ontario to San Diego

Search Deals

Air Canada
6/10-31/12
1 total stop
11h 42m total
Ontario to San Diego

Search Deals

Highest demand for flights based on searches. 13% potential increase in price (C$ 141 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 20 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 Ontario to San Diego.

Search Deals

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

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaSan Diego

YOW Ottawa - SAN San Diego

YOWSAN

Ottawa

Wed 16/9

7:20 a.m.-2:10 p.m.

1 stop9h 50m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 233

MontrealSan Diego

YUL Montreal Pierre Elliott Trudeau Intl - SAN San Diego

YULSAN

Montreal Pierre Elliott Trudeau Intl

Sat 7/11

7:00 a.m.-8:36 p.m.

2 stops16h 36m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 251

LondonSan Diego

YXU London - SAN San Diego

YXUSAN

London

Thu 15/10

5:55 p.m.-2:10 p.m.

1 stop23h 15m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 251

MontrealSan Diego

YUL Montreal Pierre Elliott Trudeau Intl - SAN San Diego

YULSAN

Montreal Pierre Elliott Trudeau Intl

Sat 10/10

6:35 p.m.-12:31 a.m.

1 stop8h 56m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 255

MontrealSan Diego

YUL Montreal Pierre Elliott Trudeau Intl - SAN San Diego

YULSAN

Montreal Pierre Elliott Trudeau Intl

Tue 29/9

6:00 a.m.-12:22 p.m.

1 stop9h 22m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 255

MontrealSan Diego

YUL Montreal Pierre Elliott Trudeau Intl - SAN San Diego

YULSAN

Montreal Pierre Elliott Trudeau Intl

Fri 30/10

7:00 a.m.-8:36 p.m.

2 stops16h 36m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 255

MontrealSan Diego

YUL Montreal Pierre Elliott Trudeau Intl - SAN San Diego

YULSAN

Montreal Pierre Elliott Trudeau Intl

Fri 23/10

9:45 a.m.-10:57 p.m.

2 stops16h 12m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 255

MontrealSan Diego

YUL Montreal Pierre Elliott Trudeau Intl - SAN San Diego

YULSAN

Montreal Pierre Elliott Trudeau Intl

Sat 31/10

7:00 a.m.-9:26 p.m.

2 stops17h 26m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 255

MontrealSan Diego

YUL Montreal Pierre Elliott Trudeau Intl - SAN San Diego

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 28/10

7:00 a.m.-8:36 p.m.

2 stops16h 36m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 255

OttawaSan Diego

YOW Ottawa - SAN San Diego

YOWSAN

Ottawa

Fri 30/10

9:45 a.m.-12:19 a.m.

2 stops17h 34m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 256

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from Ontario to San Diego

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

YOW-SAN

YUL-SAN

YYZ-SAN

YKF-SAN

YHM-SAN

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 Ontario to San Diego

CAON-SAN

YOW-SAN

YUL-SAN

YYZ-SAN

YKF-SAN

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

Currently, May is the cheapest month in which you can book a flight from Region of Ontario to San Diego (average of C$ 585). Flying from Region of Ontario to San Diego in August is currently the most expensive (average of C$ 765). 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 ON to SAN?

When flying from Region of Ontario to San Diego, 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 Region of Ontario to San Diego

The most flights from CAON to SAN 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 Region of Ontario to San Diego?

Airfare is below average for this route at the moment.

Region of Ontario to San Diego flights typically cost between C$ 615 and C$ 859 in October.
The cheapest round-trip price found within the last 5 days was C$ 516 on WestJet (15 Oct-19 Oct).

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

To ensure you get the cheapest price possible for a flight from Region of Ontario to San Diego, you should look to book at least 86 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Related info for your journey

What airport do you fly into for flights to San Diego from Ontario?
San Diego (SAN), located 4.2 km from the city centre, is the airport you fly into when you book flights from Ontario to San Diego.
How long is the flight from Region of Ontario to San Diego?
Departing from Region of Ontario to San Diego will take you 8h 46m. The distance between Region of Ontario and San Diego is about 3798 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines to fly from Region of Ontario to San Diego one-way?
To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at C$ 233. American Airlines flights start at C$ 246 while deals on Air Canada start at C$ 257 one-way.
What are the most popular routes from Region of Ontario to San Diego?
Most travellers choose Toronto Pearson Intl - San Diego, Montreal Pierre Elliott Trudeau Intl - San Diego or Toronto Island - San Diego when deciding on the best route from Region of Ontario to San Diego.
What are the most reliable airlines from Region of Ontario to San Diego?
The top 3 most reliable airlines when flying from Region of Ontario to San Diego are Air Canada (80%), United Airlines (79%) and Air Canada Rouge (72%).
What are the cheapest flights from Region of Ontario to San Diego?
While on average a flight from Region of Ontario to San Diego is generally C$ 686, our data shows the cheapest flight currently is C$ 387. When looking at the most popular route, (Toronto Pearson Intl - San Diego), you can expect to pay C$ 478 for that flight.
Can I find deals for flights from Ontario to San Diego that include hotel bookings?
Yes. In addition to deals on Ontario to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to San Diego?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to San Diego.
Can I find deals for business class flights from Ontario to San Diego?
Yes. Cheapflights offers flight deals from Ontario to San Diego 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 Region of Ontario to San Diego?
Currently, May is the cheapest month in which you can book a flight from Region of Ontario to San Diego (average of C$ 585). Flying from Region of Ontario to San Diego in August is currently the most expensive (average of C$ 765). 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

El Cajon

La Mesa

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Top 5 airlines flying from Ontario to San Diego

Airline	Cheapest	Average	Flexibility	On-time
Delta	CheapestC$ 311	AverageC$ 548	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Air Canada	CheapestC$ 324	AverageC$ 749	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
American Airlines	CheapestC$ 397	AverageC$ 616	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
WestJet	CheapestC$ 400	AverageC$ 577	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
United Airlines	CheapestC$ 414	AverageC$ 581	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Fly with Cheapflights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to San Diego. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights simply makes it quick and affordable to book flights from Ontario to San Diego by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Yes! Cheapflights helps users easily find flights from Ontario to San Diego with no change fees.

Can Cheapflights notify me if prices for flights from Ontario to San Diego become cheaper?

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

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Cheap flights from Ontario to San Diego from C$ 214

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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ontario to San Diego

Cheapest flights from Ontario to San DiegoExplore the most affordable flight options available from Ontario to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2026.

Explore the most affordable flight options available from Ontario to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2026.

Best flights from Ontario to San DiegoDiscover carefully curated flight deals from Ontario to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Discover carefully curated flight deals from Ontario to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Direct flights from Ontario to San DiegoExplore direct flight options from Ontario to San Diego based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 September 2026.

Explore direct flight options from Ontario to San Diego based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 September 2026.

Last-minute flights from Ontario to San DiegoDiscover last-minute flight deals from Ontario to San Diego. Data last updated 10 September 2026 and is based on user searches.

Discover last-minute flight deals from Ontario to San Diego. Data last updated 10 September 2026 and is based on user searches.

One-way flights from Ontario to San DiegoSearch for one-way flight options from Ontario to San Diego. Find affordable one-way fares based on user searches. Data last updated 10 September 2026.

Search for one-way flight options from Ontario to San Diego. Find affordable one-way fares based on user searches. Data last updated 10 September 2026.

Find flight deals from Ontario to San Diego

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

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

Best time to book a flight from Ontario to San Diego

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

Cheapflights Insights

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

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

Find hourly flight availability from Ontario to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 10 September 2026.

When flying from Region of Ontario to San Diego, 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 Region of Ontario to San Diego

Explore weekly flight availability from Ontario to San Diego. 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 10 September 2026.

The most flights from CAON to SAN 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 Region of Ontario to San Diego?

Airfare is below average for this route at the moment.

Region of Ontario to San Diego flights typically cost between C$ 615 and C$ 859 in October.The cheapest round-trip price found within the last 5 days was C$ 516 on WestJet (15 Oct-19 Oct).

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

To ensure you get the cheapest price possible for a flight from Region of Ontario to San Diego, you should look to book at least 86 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Related info for your journey

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

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

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

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

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

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

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

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

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

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

Travelling to a place near San Diego?

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Alternative routes for Ontario to San Diego

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to San Diego by adding a car rental and/or hotel reservation to your travel itinerary.

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Search flights from Ontario to San Diego by cabin class

Find flights from Ontario to San Diego, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Ontario and San Diego flights

Browse other Ontario and San Diego flight options. Last updated on 10 September 2026.

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Explore flights to San Diego departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 10 September 2026.

Ontario to San Diego flights

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Cheapest flights from Ontario to San Diego
Explore the most affordable flight options available from Ontario to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2026.

Best flights from Ontario to San Diego
Discover carefully curated flight deals from Ontario to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Direct flights from Ontario to San Diego
Explore direct flight options from Ontario to San Diego based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 September 2026.

Last-minute flights from Ontario to San Diego
Discover last-minute flight deals from Ontario to San Diego. Data last updated 10 September 2026 and is based on user searches.

One-way flights from Ontario to San Diego
Search for one-way flight options from Ontario to San Diego. Find affordable one-way fares based on user searches. Data last updated 10 September 2026.

Region of Ontario to San Diego flights typically cost between C$ 615 and C$ 859 in October.
The cheapest round-trip price found within the last 5 days was C$ 516 on WestJet (15 Oct-19 Oct).