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Cheap flights from Montreal to San Diego from C$ 192

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/10. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — SAN
15 Oct — 22 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Montreal to San Diego are usually found in January or May, booked 34 days in advance, depart on a Tuesday or Sunday and return on a Wednesday

Cheap flight deals from Montreal to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Montreal (YMQ) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 15 September 2025.

Round-trip from

C$ 461

One-way from

C$ 192

Popular in

December

Cheapest in

January

Average price

C$ 557

Good round-trip deal

C$ 694 or less
24/10-3/11
  • 24/10-3/11
  • 3 total stops
  • 41h 16m total
  • Montreal to San Diego
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23/10
  • 23/10
  • 3 total stops
  • 32h 17m total
  • Montreal to San Diego
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 105 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease (C$ 38 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Montreal (YMQ) to San Diego.
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Find flight deals from Montreal to San Diego

Cheapest flights from Montreal to San Diego
Explore the most affordable flight options available from Montreal to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 September 2025.

Fri 24/106:45 a.m.YUL - SAN
2 stops19h 19mMultiple Airlines
Mon 3/1112:35 p.m.SAN - YUL
1 stop21h 57mMultiple Airlines
Deal found 14/9C$ 461
Thu 23/107:00 a.m.YUL - SAN
2 stops19h 04mMultiple Airlines
Mon 3/1112:35 p.m.SAN - YUL
1 stop21h 57mMultiple Airlines
Deal found 15/9C$ 482
Sun 14/127:30 p.m.YUL - SAN
1 stop19h 15mMultiple Airlines
Mon 15/121:48 p.m.SAN - YUL
2 stops14h 17mMultiple Airlines
Deal found 15/9C$ 486
Sat 6/126:45 a.m.YUL - SAN
2 stops32h 00mWestJet
Sun 14/1212:35 p.m.SAN - YUL
1 stop15h 30mWestJet
Deal found 13/9C$ 506
Tue 9/126:00 a.m.YUL - SAN
2 stops16h 52mUnited Airlines
Tue 9/129:55 p.m.SAN - YUL
1 stop14h 21mUnited Airlines
Deal found 14/9C$ 511
Mon 6/106:35 p.m.YUL - SAN
1 stop27h 58mMultiple Airlines
Wed 22/108:00 a.m.SAN - YUL
2 stops13h 41mMultiple Airlines
Deal found 13/9C$ 514
Sat 25/106:45 a.m.YUL - SAN
2 stops27h 41mMultiple Airlines
Mon 3/1112:35 p.m.SAN - YUL
1 stop21h 57mMultiple Airlines
Deal found 14/9C$ 517
Sat 6/129:15 a.m.YUL - SAN
2 stops14h 30mUnited Airlines
Sun 14/128:40 p.m.SAN - YUL
2 stops14h 20mUnited Airlines
Deal found 14/9C$ 519
Wed 1/107:00 a.m.YUL - SAN
2 stops43h 34mMultiple Airlines
Fri 17/102:05 p.m.SAN - YUL
1 stop21h 05mMultiple Airlines
Deal found 13/9C$ 521
Mon 6/106:35 p.m.YUL - SAN
1 stop27h 58mMultiple Airlines
Thu 23/106:25 a.m.SAN - YUL
2 stops15h 16mMultiple Airlines
Deal found 13/9C$ 524
Thu 2/107:00 a.m.YUL - SAN
2 stops27h 29mMultiple Airlines
Fri 17/102:05 p.m.SAN - YUL
1 stop21h 05mMultiple Airlines
Deal found 13/9C$ 525

Cheapflights Fare Finder

 
Customize your flight search to find flights from Montreal to San Diego that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 15 September 2025.
Use the filters below to find and compare flights from Montreal to San Diego that are best for you.

Fly from

Montreal

Fly to

San Diego

Route

Depart

Return

Price

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Tue 18/11

12:45 p.m.-8:13 p.m.

1 stop10h 28m

San Diego

Mon 24/11

10:00 p.m.-11:59 a.m.

1 stop10h 59m

C$ 519

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Sat 8/11

2:13 p.m.-8:33 p.m.

1 stop9h 20m

San Diego

Sat 15/11

10:00 p.m.-3:16 p.m.

1 stop14h 16m

C$ 519

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 5/11

6:00 a.m.-2:32 p.m.

1 stop11h 32m

San Diego

Fri 14/11

10:00 p.m.-11:59 a.m.

1 stop10h 59m

C$ 519

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Thu 23/10

6:15 a.m.-11:40 a.m.

1 stop8h 25m

San Diego

Mon 3/11

10:00 p.m.-3:16 p.m.

1 stop14h 16m

C$ 519

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Sat 29/11

12:50 p.m.-10:20 p.m.

1 stop12h 30m

San Diego

Tue 9/12

10:30 p.m.-11:34 a.m.

1 stop10h 04m

C$ 519

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 5/11

6:00 a.m.-7:52 p.m.

2 stops16h 52m

San Diego

Thu 13/11

5:50 p.m.-1:28 p.m.

2 stops16h 38m

C$ 519

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Mon 17/11

12:50 p.m.-6:29 p.m.

1 stop8h 39m

San Diego

Tue 25/11

10:00 p.m.-11:59 a.m.

1 stop10h 59m

C$ 519

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Thu 6/11

12:55 p.m.-9:53 p.m.

1 stop11h 58m

San Diego

Sun 16/11

9:50 p.m.-11:40 a.m.

1 stop10h 50m

C$ 519

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Thu 27/11

6:00 a.m.-2:15 p.m.

1 stop11h 15m

San Diego

Thu 4/12

12:14 p.m.-11:59 p.m.

1 stop8h 45m

C$ 519

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Tue 18/11

12:45 p.m.-8:13 p.m.

1 stop10h 28m

San Diego

Tue 25/11

10:00 p.m.-11:59 a.m.

1 stop10h 59m

C$ 519

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/9

Showing 1-10 of 20 results
1
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Best time to book a flight from Montreal to San Diego

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

How far ahead should I book a flight from Montreal to San Diego?

Use this chart to determine the optimal time to book a round-trip flight from Montreal to San Diego. Price data was last updated on 12 September 2025.

Booking 34 days in advance of your planned departure date is, on average, the best time to get cheap flights from Montreal to San Diego. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Montreal to San Diego?

Currently, May is the cheapest month in which you can book a flight from Montreal to San Diego (average of C$ 289). Flying from Montreal to San Diego in November is currently the most expensive (average of C$ 390). 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 YMQ to SAN?

Find hourly flight availability from Montreal 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 15 September 2025.

One of the essential ways to save on airfare from Montreal to San Diego is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 35% on airfare.

What is the cheapest day to fly from Montreal to San Diego?

Use this chart to determine the cheapest time to fly round-trip from Montreal to San Diego. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Montreal to San Diego flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Montreal to San Diego?

What’s the top layover airport for flights from Montreal to San Diego?

Share of one-stop round-trip flights from Montreal to San Diego chosen by Cheapflights users in the past 12 months, using the same layover each way.

Toronto (YYZ) – chosen by Cheapflights users on 36% of one-stop itineraries from Montreal to San Diego on Cheapflights.

What’s the cheapest layover airport for flights from Montreal to San Diego?

Average round-trip fare for 1-stop flights from Montreal to San Diego, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Newark (EWR) is the most affordable 1-stop option, with an average round-trip price of C$ 424.

What’s the fastest layover option from Montreal to San Diego?

Shortest average travel time for 1-stop one-way flights from Montreal to San Diego, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 8h 25m.

Which airport typically offers the quickest layover for flights from Montreal to San Diego?

Average layover duration for 1-stop one-way flights from Montreal to San Diego, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 1h 11m.

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Diego. Reviews last updated 15 September 2025.
Check out reviews from past customers who have flown with Delta,Porter Airlines, andUnited Airlines from Montreal to San Diego to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,954 reviews
Check prices

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,954 reviews
Delta
8.0
Very good
7,954 reviews
Check prices

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Porter Airlines
7.9
Good
363 reviews
Delta
8.0
Very good
7,954 reviews
Check prices

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,929 reviews
Delta
8.0
Very good
7,954 reviews
Check prices

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,954 reviews
Check prices

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air Canada
7.1
Good
10,000 reviews
Delta
8.0
Very good
7,954 reviews
Check prices

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Montreal to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    San Diego (SAN), located 4.2 km from the city centre, is the airport you fly into when you book flights from Montreal to San Diego. 6 airlines have flights to San Diego from Montreal on a regular basis. Booking flights from Montreal to San Diego should not be difficult; the airport handles an average of 1 inbound flight from Montreal per day.

  • How long is the flight from Montreal to San Diego?

    Departing from Montreal to San Diego will take you 9h 20m. Montreal and San Diego are separated by a distance of 3948 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 flying from Montreal to San Diego round-trip?

    Currently priced at C$ 299, American Airlines will fly you from Montreal to San Diego and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and Porter Airlines - these airlines can fly you to your destination from C$ 299 and C$ 349, respectively. American Airlines is currently priced 44% below the average price you’ll pay for this route.

  • What are the cheapest flights from Montreal to San Diego?

    While on average a flight from Montreal to San Diego is generally C$ 995, our data shows the cheapest flight currently is C$ 443. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - San Diego), you can expect to pay C$ 511 for that flight.

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

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

  • How can I find direct flights from Montreal to San Diego?

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

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

    Yes. Cheapflights offers flight deals from Montreal 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 Montreal to San Diego?

    Currently, May is the cheapest month in which you can book a flight from Montreal to San Diego (average of C$ 289). Flying from Montreal to San Diego in November is currently the most expensive (average of C$ 390). 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

Travelling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
Borrego Springs
El Cajon

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Fly from Montreal to San Diego on these airlines

Choose from the following airlines for your flight from Montreal to San Diego. Flights are based on user searches made on Cheapflights and were last updated on 15 September 2025.
Air Canada flights from Montreal to San Diego
United Airlines flights from Montreal to San Diego
Delta flights from Montreal to San Diego

Top 6 airlines flying from Montreal to San Diego

Discover the top 6 airlines that operate flights from Montreal to San Diego. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 15 September 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 299AverageC$ 424FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapestC$ 299AverageC$ 455FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Porter AirlinesCheapestC$ 349AverageC$ 554FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 355AverageC$ 592FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 361AverageC$ 442FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 362AverageC$ 511FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights helps you search for flights from Montreal to San Diego via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Montreal to San Diego for you. Better yet — we are completely free to use.

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

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

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

Of course! You can now track prices for flights from Montreal to San Diego and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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