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Cheap flights from Montreal to San Diego from C$ 249

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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — SAN
20 Feb — 27 Feb1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Montreal to San Diego are usually found in January or June, booked 65 days in advance, depart on a Monday or Tuesday and return on a Wednesday

Cheap flight deals from Montreal to San Diego

Enter your travel dates to find the best prices.

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 21 January 2026.

Thu 19/27:30 a.m.
YUL
-
SAN
1 stop14h 54m
American Airlines
Tue 24/210:35 p.m.
SAN
-
YUL
1 stop13h 29m
American Airlines
Deal found 20/1C$ 528
Fri 17/412:46 p.m.
YUL
-
SAN
1 stop11h 01m
Delta
Sun 26/49:45 p.m.
SAN
-
YUL
1 stop10h 56m
Delta
Deal found 21/1C$ 532
Thu 16/412:46 p.m.
YUL
-
SAN
1 stop8h 53m
Delta
Sun 26/49:45 p.m.
SAN
-
YUL
1 stop10h 56m
Delta
Deal found 21/1C$ 534
Thu 16/46:00 a.m.
YUL
-
SAN
1 stop8h 53m
Air Canada
Sat 25/41:10 p.m.
SAN
-
YUL
1 stop8h 21m
Air Canada
Deal found 21/1C$ 535
Wed 22/46:00 a.m.
YUL
-
SAN
1 stop8h 53m
Air Canada
Mon 27/41:10 p.m.
SAN
-
YUL
1 stop8h 21m
Air Canada
Deal found 21/1C$ 548
Sun 8/37:00 a.m.
YUL
-
SAN
1 stop12h 31m
Delta
Sun 15/310:30 p.m.
SAN
-
YUL
1 stop10h 07m
Delta
Deal found 21/1C$ 553
Tue 19/55:45 p.m.
YUL
-
SAN
Nonstop5h 58m
Air Canada
Fri 22/57:00 a.m.
SAN
-
YUL
Nonstop5h 31m
Air Canada
Deal found 20/1C$ 565
Sun 21/66:00 a.m.
YUL
-
SAN
1 stop8h 40m
Air Canada
Fri 26/67:00 a.m.
SAN
-
YUL
Nonstop5h 33m
Air Canada
Deal found 21/1C$ 567
Wed 25/38:00 a.m.
YUL
-
SAN
1 stop30h 46m
Multiple Airlines
Tue 31/32:08 p.m.
SAN
-
YUL
2 stops31h 30m
Multiple Airlines
Deal found 19/1C$ 568
Fri 6/34:45 p.m.
YUL
-
SAN
1 stop9h 17m
Delta
Fri 13/310:10 p.m.
SAN
-
YUL
1 stop10h 49m
Delta
Deal found 19/1C$ 571
Wed 25/312:50 p.m.
YUL
-
SAN
1 stop13h 09m
Delta
Tue 31/310:10 p.m.
SAN
-
YUL
1 stop10h 49m
Delta
Deal found 20/1C$ 572
Wed 21/106:00 a.m.
YUL
-
SAN
1 stop11h 11m
Delta
Wed 28/109:40 p.m.
SAN
-
YUL
1 stop11h 04m
Delta
Deal found 21/1C$ 574

Find 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 21 January 2026.

Round-trip from

C$ 527

One-way from

C$ 249

Popular in

December

Cheapest in

January

Average price

C$ 422

Good round-trip deal

C$ 319 or less
American Airlines
  • American Airlines
  • 19/2-24/2
  • 2 total stops
  • 22h 28m total
  • Montreal to San Diego
Search Deals
8/2
  • 8/2
  • 2 total stops
  • 32h 57m total
  • Montreal to San Diego
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Montreal (YMQ) to San Diego.
Search Deals

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 21 January 2026.
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

Wed 18/2

12:59 p.m.-9:59 p.m.

1 stop12h 00m

San Diego

Mon 23/2

10:35 p.m.-3:04 p.m.

1 stop13h 29m

C$ 541

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Fri 3/4

12:42 p.m.-11:09 p.m.

1 stop13h 27m

San Diego

Tue 7/4

10:30 p.m.-11:37 a.m.

1 stop10h 07m

C$ 571

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Tue 21/4

12:46 p.m.-6:39 p.m.

1 stop8h 53m

San Diego

Wed 22/4

9:45 p.m.-11:41 a.m.

1 stop10h 56m

C$ 571

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Fri 3/4

7:00 a.m.-4:31 p.m.

1 stop12h 31m

San Diego

Mon 13/4

6:15 a.m.-4:15 p.m.

1 stop7h 00m

C$ 571

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Fri 27/3

7:00 a.m.-4:31 p.m.

1 stop12h 31m

San Diego

Wed 1/4

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

1 stop10h 49m

C$ 571

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 25/2

2:40 p.m.-8:53 p.m.

1 stop9h 13m

San Diego

Mon 2/3

10:20 p.m.-11:25 a.m.

1 stop10h 05m

C$ 571

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 22/4

7:00 a.m.-1:28 p.m.

1 stop9h 28m

San Diego

Mon 27/4

10:30 p.m.-11:41 a.m.

1 stop10h 11m

C$ 571

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Fri 6/3

12:30 p.m.-10:48 p.m.

1 stop13h 18m

San Diego

Mon 23/3

10:30 p.m.-11:37 a.m.

1 stop10h 07m

C$ 571

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Sat 7/3

12:52 p.m.-6:16 p.m.

1 stop8h 24m

San Diego

Sat 14/3

10:30 p.m.-11:37 a.m.

1 stop10h 07m

C$ 572

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Fri 27/3

7:00 a.m.-4:31 p.m.

1 stop12h 31m

San Diego

Tue 7/4

9:55 p.m.-11:37 a.m.

1 stop10h 42m

C$ 574

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/1

Showing 1-10 of 22 results
1
2
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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 16 January 2026.

Booking 65 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, April is the cheapest month in which you can book a flight from Montreal to San Diego (average of C$ 185). Flying from Montreal to San Diego in December is currently the most expensive (average of C$ 423). 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.

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 45% 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 05m.

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 04m.

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 21 January 2026.
Check out reviews from past customers who have flown with Porter Airlines,Delta, 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.
Porter Airlines
7.9
Good
412 reviews
Check prices

Overall

7.9

Comfort

7.9

Crew

8.6

Entertainment

6.9

Food

7.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
7.9
Good
412 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Overall

7.9

Comfort

7.9

Crew

8.6

Entertainment

6.9

Food

7.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Delta
7.9
Good
8,088 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Overall

7.9

Comfort

7.9

Crew

8.6

Entertainment

6.9

Food

7.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,191 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Overall

7.9

Comfort

7.9

Crew

8.6

Entertainment

6.9

Food

7.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
American Airlines
7.2
Good
11,173 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Overall

7.9

Comfort

7.9

Crew

8.6

Entertainment

6.9

Food

7.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,646 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Overall

7.9

Comfort

7.9

Crew

8.6

Entertainment

6.9

Food

7.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

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 0 inbound flights from Montreal per day.

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

    Departing from Montreal to San Diego will take you 12h. 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$ 271, WestJet will fly you from Montreal to San Diego and back. In addition to WestJet, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from C$ 272 and C$ 272, respectively. WestJet is currently priced 46% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Montreal to San Diego one-way?

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as C$ 170. Users have also found prices from C$ 221 and C$ 235 on Air Canada and Delta, respectively.

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

    While on average a flight from Montreal to San Diego is generally C$ 421, our data shows the cheapest flight currently is C$ 319. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - San Diego), you can expect to pay C$ 525 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, April is the cheapest month in which you can book a flight from Montreal to San Diego (average of C$ 185). Flying from Montreal to San Diego in December is currently the most expensive (average of C$ 423). 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
El Cajon
La Mesa
Borrego Springs

Browse thousands of different options on Cheapflights for your next trip

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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 21 January 2026.
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 21 January 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 271AverageC$ 396FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 272AverageC$ 451FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 272AverageC$ 423FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 317AverageC$ 554FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 340AverageC$ 498FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 342AverageC$ 471FlexibilityNo cancel feeOn-time52%
Search Porter 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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