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Cheap flights from Montreal to San Diego from C$ 229

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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — SAN
19 Aug — 26 Aug1
1 adult

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

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 14 August 2025.

Round-trip from

C$ 398

One-way from

C$ 229

Popular in

December

Cheapest in

April

Average price

C$ 564

Good round-trip deal

C$ 412 or less
3/9-6/9
  • 3/9-6/9
  • 4 total stops
  • 29h 33m total
  • Montreal to San Diego
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10/9
  • 10/9
  • 3 total stops
  • 19h 34m total
  • Montreal to San Diego
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Highest demand for flights based on searches. 13% potential increase in price (C$ 116 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 35 potential savings vs. average RT price).
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Average for round-trip flights in August 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 14 August 2025.

Wed 3/96:45 a.m.YUL - SAN
2 stops14h 11mMultiple Airlines
Sat 6/96:15 a.m.SAN - YUL
2 stops15h 22mMultiple Airlines
Deal found 13/8C$ 398
Wed 3/96:45 a.m.YUL - SAN
2 stops18h 37mMultiple Airlines
Fri 5/96:25 a.m.SAN - YUL
2 stops15h 12mMultiple Airlines
Deal found 13/8C$ 418
Tue 2/96:45 a.m.YUL - SAN
2 stops19h 52mMultiple Airlines
Sat 6/96:15 a.m.SAN - YUL
2 stops15h 22mMultiple Airlines
Deal found 13/8C$ 427
Wed 27/85:29 p.m.YUL - SAN
1 stop19h 15mAmerican Airlines
Mon 1/910:54 p.m.SAN - YUL
1 stop13h 26mAmerican Airlines
Deal found 12/8C$ 430
Tue 2/96:45 a.m.YUL - SAN
2 stops19h 52mMultiple Airlines
Wed 10/96:15 a.m.SAN - YUL
2 stops15h 22mMultiple Airlines
Deal found 13/8C$ 437
Thu 2/103:10 p.m.YUL - SAN
2 stops23h 38mMultiple Airlines
Thu 9/103:59 p.m.SAN - YUL
2 stops14h 03mMultiple Airlines
Deal found 13/8C$ 438
Mon 22/97:00 a.m.YUL - SAN
2 stops18h 26mMultiple Airlines
Wed 1/106:15 a.m.SAN - YUL
2 stops15h 12mMultiple Airlines
Deal found 13/8C$ 447
Tue 2/92:20 p.m.YUL - SAN
1 stop8h 59mUnited Airlines
Sat 6/92:21 p.m.SAN - YUL
2 stops17h 19mUnited Airlines
Deal found 13/8C$ 465
Tue 21/108:25 a.m.YUL - SAN
1 stop10h 26mAir Canada
Sun 26/108:10 a.m.SAN - YUL
Nonstop5h 30mAir Canada
Deal found 13/8C$ 467
Wed 3/97:50 a.m.YUL - SAN
1 stop16h 53mAmerican Airlines
Wed 10/95:15 p.m.SAN - YUL
1 stop18h 34mAmerican Airlines
Deal found 13/8C$ 470

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 14 August 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

Wed 3/9

6:45 a.m.-5:56 p.m.

2 stops14h 11m

San Diego

Sat 6/9

6:15 a.m.-12:37 a.m.

2 stops15h 22m

C$ 398

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 3/9

6:45 a.m.-10:22 p.m.

2 stops18h 37m

San Diego

Fri 5/9

6:25 a.m.-12:37 a.m.

2 stops15h 12m

C$ 418

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Tue 2/9

6:45 a.m.-11:37 p.m.

2 stops19h 52m

San Diego

Sat 6/9

6:15 a.m.-12:37 a.m.

2 stops15h 22m

C$ 427

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 27/8

5:29 p.m.-9:44 a.m.

1 stop19h 15m

San Diego

Mon 1/9

10:54 p.m.-3:20 p.m.

1 stop13h 26m

C$ 430

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Tue 2/9

6:45 a.m.-11:37 p.m.

2 stops19h 52m

San Diego

Wed 10/9

6:15 a.m.-12:37 a.m.

2 stops15h 22m

C$ 437

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Thu 2/10

3:10 p.m.-11:48 a.m.

2 stops23h 38m

San Diego

Thu 9/10

3:59 p.m.-9:02 a.m.

2 stops14h 03m

C$ 438

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Mon 22/9

7:00 a.m.-10:26 p.m.

2 stops18h 26m

San Diego

Wed 1/10

6:15 a.m.-12:27 a.m.

2 stops15h 12m

C$ 447

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Tue 2/9

2:20 p.m.-8:19 p.m.

1 stop8h 59m

San Diego

Sat 6/9

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

1 stop9h 10m

C$ 465

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Sun 31/8

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

1 stop8h 25m

San Diego

Fri 5/9

7:21 p.m.-8:16 a.m.

1 stop9h 55m

C$ 465

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 10/9

7:00 a.m.-11:34 p.m.

3 stops19h 34m

C$ 229

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/8

Showing 1-10 of 18 results
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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 8 August 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 14 August 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 36% 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.

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 38% 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$ 423.

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 14 August 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.
Porter Airlines
8.0
Very good
332 reviews
Check prices

Entertainment

7.0

Crew

8.7

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Porter Airlines
8.0
Very good
332 reviews
Porter Airlines
8.0
Very good
332 reviews
Check prices

Entertainment

7.0

Crew

8.7

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Delta
8.0
Very good
7,982 reviews
Porter Airlines
8.0
Very good
332 reviews
Check prices

Entertainment

7.0

Crew

8.7

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
United Airlines
7.4
Good
8,915 reviews
Porter Airlines
8.0
Very good
332 reviews
Check prices

Entertainment

7.0

Crew

8.7

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
American Airlines
7.2
Good
10,000 reviews
Porter Airlines
8.0
Very good
332 reviews
Check prices

Entertainment

7.0

Crew

8.7

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Air Canada
7.1
Good
9,956 reviews
Porter Airlines
8.0
Very good
332 reviews
Check prices

Entertainment

7.0

Crew

8.7

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience

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.

  • What are the cheapest airlines flying from Montreal to San Diego round-trip?

    Currently priced at C$ 298, 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$ 325 and C$ 349, 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$ 607, our data shows the cheapest flight currently is C$ 404. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - San Diego), you can expect to pay C$ 418 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 14 August 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 14 August 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 298AverageC$ 423FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapestC$ 325AverageC$ 458FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Porter AirlinesCheapestC$ 349AverageC$ 577FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 354AverageC$ 607FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 360AverageC$ 441FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 361AverageC$ 521FlexibilityNo 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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