Cheap flights from Montreal to San Diego from C$ 274

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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — SAN
15 Nov — 22 Nov1
1 adult
1 adult, Economy

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

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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 16 October 2025.

Thu 20/114:15 p.m.YUL - SAN
1 stop22h 30mWestJet
Fri 28/1112:35 p.m.SAN - YUL
2 stops33h 08mWestJet
Deal found 14/10C$ 503
Thu 4/126:45 a.m.YUL - SAN
2 stops11h 53mMultiple Airlines
Wed 10/1212:35 p.m.SAN - YUL
1 stop15h 30mMultiple Airlines
Deal found 15/10C$ 529
Fri 14/116:00 a.m.YUL - SAN
1 stop11h 15mDelta
Fri 21/1110:00 p.m.SAN - YUL
1 stop10h 59mDelta
Deal found 15/10C$ 532
Thu 13/1112:50 p.m.YUL - SAN
1 stop12h 30mDelta
Sun 16/1110:30 p.m.SAN - YUL
1 stop10h 10mDelta
Deal found 14/10C$ 534
Sat 6/127:14 a.m.YUL - SAN
2 stops14h 11mAmerican Airlines
Sun 14/1210:45 p.m.SAN - YUL
1 stop10h 35mAmerican Airlines
Deal found 14/10C$ 543
Sat 22/116:00 p.m.YUL - SAN
1 stop20h 45mMultiple Airlines
Fri 28/1112:35 p.m.SAN - YUL
2 stops24h 52mMultiple Airlines
Deal found 14/10C$ 549
Thu 13/114:00 p.m.YUL - SAN
1 stop10h 56mAmerican Airlines
Sat 15/116:15 a.m.SAN - YUL
2 stops13h 25mAmerican Airlines
Deal found 14/10C$ 550
Mon 15/122:13 p.m.YUL - SAN
2 stops11h 17mUnited Airlines
Thu 8/16:55 p.m.SAN - YUL
2 stops17h 21mUnited Airlines
Deal found 15/10C$ 553
Fri 21/116:00 a.m.YUL - SAN
1 stop8h 31mUnited Airlines
Sat 29/1110:00 p.m.SAN - YUL
1 stop14h 16mUnited Airlines
Deal found 14/10C$ 555
Sun 14/126:00 a.m.YUL - SAN
1 stop8h 30mUnited Airlines
Wed 31/129:30 p.m.SAN - YUL
1 stop14h 46mUnited Airlines
Deal found 14/10C$ 559
Sun 9/117:00 a.m.YUL - SAN
1 stop11h 31mDelta
Sun 16/1110:30 p.m.SAN - YUL
1 stop10h 10mDelta
Deal found 14/10C$ 563

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 16 October 2025.

Round-trip from

C$ 490

One-way from

C$ 274

Popular in

December

Cheapest in

January

Average price

C$ 507

Good round-trip deal

C$ 681 or less
American Airlines
  • American Airlines
  • 3/2-10/2
  • 2 total stops
  • 38h 45m total
  • Montreal to San Diego
12/11
  • 12/11
  • 3 total stops
  • 32h 50m total
  • Montreal to San Diego
Highest demand for flights based on searches. 15% potential increase in price (C$ 142 potential increase over avg. RT price).
Cheapest flight prices on average. 5% potential price decrease (C$ 40 potential savings vs. average RT price).
Average for round-trip flights in October 2025
Price to beat on a round-trip flight from Montreal (YMQ) to San Diego.

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 16 October 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 24/2

3:00 p.m.-8:35 p.m.

1 stop8h 35m

San Diego

Wed 25/2

10:30 p.m.-12:20 p.m.

1 stop10h 50m

C$ 532

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Sat 6/12

6:00 a.m.-2:12 p.m.

1 stop11h 12m

San Diego

Sun 14/12

6:25 a.m.-5:25 p.m.

1 stop8h 00m

C$ 532

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Tue 13/1

12:45 p.m.-10:00 p.m.

1 stop12h 15m

San Diego

Wed 29/4

8:50 a.m.-11:34 p.m.

1 stop11h 44m

C$ 532

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Thu 4/12

7:00 a.m.-1:02 p.m.

1 stop9h 02m

San Diego

Wed 10/12

6:25 a.m.-5:25 p.m.

1 stop8h 00m

C$ 532

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Mon 17/11

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

1 stop11h 15m

San Diego

Wed 26/11

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

1 stop10h 59m

C$ 532

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Thu 15/1

12:45 p.m.-10:00 p.m.

1 stop12h 15m

San Diego

Sun 18/1

10:30 p.m.-12:20 p.m.

1 stop10h 50m

C$ 532

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Fri 5/12

5:00 p.m.-10:24 p.m.

1 stop8h 24m

San Diego

Sun 7/12

11:30 a.m.-11:32 p.m.

1 stop9h 02m

C$ 534

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Thu 13/11

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

1 stop12h 30m

San Diego

Sun 16/11

10:30 p.m.-11:40 a.m.

1 stop10h 10m

C$ 534

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 12/11

6:45 a.m.-12:35 p.m.

3 stops32h 50m

C$ 274

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 24/12

2:40 p.m.-9:03 p.m.

1 stop9h 23m

C$ 307

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/10

Showing 1-10 of 17 results
1
2

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 10 October 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, April is the cheapest month in which you can book a flight from Montreal to San Diego (average of C$ 188). Flying from Montreal to San Diego in September is currently the most expensive (average of C$ 361). 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 16 October 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 evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 40% 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. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Montreal to San Diego

Explore weekly flight availability from Montreal 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 16 October 2025.

The most flights from YMQ 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 Montreal to San Diego?

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 16 October 2025.
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.

Crew

8.6

Overall

8.0

Entertainment

7.0

Comfort

8.0

Food

7.6

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

Crew

8.6

Overall

8.0

Entertainment

7.0

Comfort

8.0

Food

7.6

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
8.0
Very good

Crew

8.6

Overall

8.0

Entertainment

7.0

Comfort

8.0

Food

7.6

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

Crew

8.6

Overall

8.0

Entertainment

7.0

Comfort

8.0

Food

7.6

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

Crew

8.6

Overall

8.0

Entertainment

7.0

Comfort

8.0

Food

7.6

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

Crew

8.6

Overall

8.0

Entertainment

7.0

Comfort

8.0

Food

7.6

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

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 2 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 8h 35m. Montreal and San Diego are separated by a distance of 3948 km.

  • 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$ 304 and C$ 355, respectively. American Airlines is currently priced 45% 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$ 1,251, our data shows the cheapest flight currently is C$ 679. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - San Diego), you can expect to pay C$ 529 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$ 188). Flying from Montreal to San Diego in September is currently the most expensive (average of C$ 361). 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
La Mesa
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 16 October 2025.

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 16 October 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 299AverageC$ 431FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapestC$ 304AverageC$ 453FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Porter AirlinesCheapestC$ 355AverageC$ 553FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 360AverageC$ 585FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 367AverageC$ 449FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 367AverageC$ 517FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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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.

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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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