Cheap flights from Montreal to Costa Mesa from C$ 254
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 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LAX
3 Dec — 10 Dec1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Montreal to Costa Mesa are usually found in May or April, booked 56 days in advance, depart on a Friday or Thursday and return on a Tuesday
Cheap flight deals from Montreal to Costa Mesa
Keep the following information in mind while searching for Montreal to Costa Mesa flight deals. Data was last updated 3 November 2025.
Explore the most affordable flight options available from Montreal to Costa Mesa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 November 2025.
Tue 2/127:30 p.m.YUL - LAX
2 stops18h 30mWestJet
Thu 11/1211:50 a.m.LAX - YUL
2 stops16h 15mWestJet
Deal found 2/11C$ 469
Mon 15/127:30 p.m.YUL - LAX
1 stop18h 57mWestJet
Thu 15/111:50 a.m.LAX - YUL
2 stops16h 15mWestJet
Deal found 31/10C$ 471
Fri 5/126:45 a.m.YUL - LAX
2 stops16h 05mWestJet
Wed 10/125:45 p.m.LAX - YUL
1 stop10h 20mWestJet
Deal found 1/11C$ 474
Mon 1/127:30 p.m.YUL - LAX
2 stops18h 30mWestJet
Mon 8/125:45 p.m.LAX - YUL
1 stop10h 20mWestJet
Deal found 1/11C$ 478
Mon 1/127:30 p.m.YUL - LAX
2 stops18h 30mMultiple Airlines
Sun 14/1210:50 a.m.LAX - YUL
1 stop26h 37mMultiple Airlines
Deal found 1/11C$ 482
Tue 2/126:45 a.m.YUL - LAX
1 stop8h 51mMultiple Airlines
Thu 11/1211:50 a.m.LAX - YUL
2 stops16h 15mMultiple Airlines
Deal found 1/11C$ 483
Tue 2/126:45 a.m.YUL - LAX
1 stop8h 51mMultiple Airlines
Fri 12/1211:50 a.m.LAX - YUL
2 stops16h 15mMultiple Airlines
Deal found 1/11C$ 486
Tue 2/127:30 a.m.YUL - LAX
1 stop11h 59mAir Canada
Sat 6/126:30 a.m.LAX - YUL
1 stop11h 30mAir Canada
Deal found 31/10C$ 492
Best flights from Montreal to Costa Mesa
Discover carefully curated flight deals from Montreal to Costa Mesa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 3 November 2025.
Wed 4/36:45 a.m.YUL - LAX
1 stop8h 54mPorter Airlines
Wed 18/31:40 p.m.LAX - YUL
1 stop7h 55mPorter Airlines
Deal found 1/11C$ 563
Sat 6/127:00 a.m.YUL - LAX
2 stops13h 25mUnited Airlines
Sat 13/1212:55 a.m.LAX - YUL
2 stops11h 21mUnited Airlines
Deal found 1/11C$ 584
Sun 23/117:10 a.m.YUL - LAX
1 stop10h 42mDelta
Wed 26/1110:30 p.m.LAX - YUL
1 stop10h 29mDelta
Deal found 1/11C$ 584
Thu 27/116:00 a.m.YUL - LAX
2 stops14h 43mUnited Airlines
Mon 1/127:26 p.m.LAX - YUL
2 stops15h 34mUnited Airlines
Deal found 1/11C$ 584
Wed 17/1212:40 p.m.YUL - LAX
1 stop8h 58mDelta
Mon 29/129:40 a.m.LAX - YUL
1 stop10h 39mDelta
Deal found 1/11C$ 595
Wed 3/122:13 p.m.YUL - LAX
1 stop10h 38mUnited Airlines
Sat 6/1212:25 a.m.LAX - YUL
1 stop17h 52mUnited Airlines
Deal found 2/11C$ 584
Sat 6/126:00 a.m.YUL - LAX
1 stop8h 52mUnited Airlines
Tue 6/16:45 p.m.LAX - YUL
2 stops15h 43mUnited Airlines
Deal found 2/11C$ 595
Thu 4/126:00 a.m.YUL - LAX
1 stop14h 14mUnited Airlines
Fri 9/15:00 a.m.LAX - YUL
2 stops13h 42mUnited Airlines
Deal found 2/11C$ 595
Sat 6/126:00 a.m.YUL - LAX
2 stops14h 25mUnited Airlines
Fri 9/15:00 a.m.LAX - YUL
2 stops13h 42mUnited Airlines
Deal found 2/11C$ 595
Thu 4/123:00 p.m.YUL - LAX
1 stop10h 50mUnited Airlines
Wed 7/19:40 p.m.LAX - YUL
2 stops13h 20mUnited Airlines
Deal found 2/11C$ 595
Mon 8/126:00 a.m.YUL - LAX
1 stop15h 21mUnited Airlines
Fri 9/15:00 a.m.LAX - YUL
2 stops13h 42mUnited Airlines
Deal found 2/11C$ 595
Sun 7/126:00 a.m.YUL - LAX
1 stop10h 17mUnited Airlines
Wed 7/19:40 p.m.LAX - YUL
2 stops13h 20mUnited Airlines
Deal found 2/11C$ 595
Direct flights from Montreal to Costa Mesa
Explore direct flight options from Montreal to Costa Mesa based on user searches, and compare prices and availability for your desired travel dates. Data last updated 3 November 2025.
Wed 26/117:00 p.m.YUL - LAX
Nonstop6h 15mAir Canada
Wed 10/128:20 a.m.LAX - YUL
Nonstop5h 13mAir Canada
Deal found 1/11C$ 493
Mon 24/117:00 p.m.YUL - LAX
Nonstop6h 15mAir Canada
Fri 28/1112:30 p.m.LAX - YUL
Nonstop5h 10mAir Canada
Deal found 31/10C$ 495
Mon 23/26:45 p.m.YUL - LAX
Nonstop6h 15mAir Canada
Wed 25/28:30 a.m.LAX - YUL
Nonstop5h 13mAir Canada
Deal found 2/11C$ 537
Sun 23/117:00 p.m.YUL - LAX
Nonstop6h 15mAir Canada
Tue 2/128:20 a.m.LAX - YUL
Nonstop5h 13mAir Canada
Deal found 2/11C$ 545
Mon 26/16:45 p.m.YUL - LAX
Nonstop6h 15mAir Canada
Wed 28/18:30 a.m.LAX - YUL
Nonstop5h 13mAir Canada
Deal found 2/11C$ 553
Wed 3/128:25 a.m.YUL - LAX
Nonstop6h 19mAir Canada
Wed 10/128:20 a.m.LAX - YUL
Nonstop5h 13mAir Canada
Deal found 1/11C$ 556
Sun 25/16:45 p.m.YUL - LAX
Nonstop6h 15mAir Canada
Mon 9/28:30 a.m.LAX - YUL
Nonstop5h 13mAir Canada
Deal found 1/11C$ 574
Wed 7/16:45 p.m.YUL - LAX
Nonstop6h 15mAir Canada
Mon 12/18:30 a.m.LAX - YUL
Nonstop5h 13mAir Canada
Deal found 1/11C$ 619
Fri 6/26:45 p.m.YUL - LAX
Nonstop6h 15mAir Canada
Tue 5/58:05 a.m.LAX - YUL
Nonstop5h 14mAir Canada
Deal found 1/11C$ 622
Mon 16/36:45 p.m.YUL - LAX
Nonstop6h 15mAir Canada
Wed 18/38:30 a.m.LAX - YUL
Nonstop5h 13mAir Canada
Deal found 2/11C$ 626
Wed 4/26:45 p.m.YUL - LAX
Nonstop6h 15mAir Canada
Sun 8/212:30 p.m.LAX - YUL
Nonstop5h 13mAir Canada
Deal found 2/11C$ 633
Last-minute flights from Montreal to Costa Mesa
Discover last-minute flight deals from Montreal to Costa Mesa. Data last updated 3 November 2025 and is based on user searches.
Fri 21/116:45 a.m.YUL - LAX
1 stop8h 51mPorter Airlines
Thu 27/111:40 p.m.LAX - YUL
1 stop7h 55mPorter Airlines
Deal found 31/10C$ 511
Sat 22/116:45 a.m.YUL - LAX
1 stop8h 51mMultiple Airlines
Fri 28/1111:15 p.m.LAX - YUL
2 stops17h 24mMultiple Airlines
Deal found 1/11C$ 520
Mon 24/117:00 p.m.YUL - LAX
Nonstop6h 15mAir Canada
Fri 28/1112:30 p.m.LAX - YUL
Nonstop5h 10mAir Canada
Deal found 31/10C$ 495
Mon 24/116:45 a.m.YUL - LAX
1 stop8h 51mMultiple Airlines
Fri 28/1111:15 p.m.LAX - YUL
2 stops17h 24mMultiple Airlines
Deal found 31/10C$ 523
Wed 26/117:00 p.m.YUL - LAX
Nonstop6h 15mAir Canada
Wed 10/128:20 a.m.LAX - YUL
Nonstop5h 13mAir Canada
Deal found 1/11C$ 493
Wed 26/116:45 a.m.YUL - LAX
1 stop8h 51mMultiple Airlines
Wed 10/1211:50 a.m.LAX - YUL
2 stops16h 15mMultiple Airlines
Deal found 1/11C$ 510
Wed 26/116:45 a.m.YUL - LAX
1 stop8h 51mPorter Airlines
Wed 10/121:40 p.m.LAX - YUL
1 stop7h 55mPorter Airlines
Deal found 1/11C$ 517
Wed 26/114:15 p.m.YUL - LAX
1 stop27h 43mWestJet
Mon 1/125:45 p.m.LAX - YUL
1 stop10h 20mWestJet
Deal found 31/10C$ 524
Thu 27/116:00 a.m.YUL - LAX
1 stop11h 25mDelta
Mon 1/1210:30 p.m.LAX - YUL
1 stop10h 30mDelta
Deal found 31/10C$ 525
One-way flights from Montreal to Costa Mesa
Search for one-way flight options from Montreal to Costa Mesa. Find affordable one-way fares based on user searches. Data last updated 3 November 2025.
Thu 12/26:45 a.m.YUL - LAX
2 stops16h 07mWestJet
Deal found 2/11C$ 254
Sat 24/16:45 a.m.YUL - LAX
1 stop8h 54mPorter Airlines
Deal found 1/11C$ 259
Mon 1/127:30 p.m.YUL - LAX
2 stops18h 30mWestJet
Deal found 1/11C$ 265
Wed 11/26:45 a.m.YUL - LAX
1 stop8h 54mPorter Airlines
Deal found 1/11C$ 266
Tue 18/116:45 a.m.YUL - LAX
3 stops20h 14mMultiple Airlines
Deal found 2/11C$ 277
Thu 11/126:45 a.m.YUL - LAX
1 stop8h 51mPorter Airlines
Deal found 2/11C$ 279
Fri 12/126:45 a.m.YUL - LAX
3 stops41h 26mMultiple Airlines
Deal found 2/11C$ 280
Wed 10/126:45 a.m.YUL - LAX
1 stop8h 51mPorter Airlines
Deal found 2/11C$ 282
Cheapflights Fare Finder
Customize your flight search to find flights from Montreal to Costa Mesa 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 3 November 2025.
Use the filters below to find and compare flights from Montreal to Costa Mesa that are best for you.
Fly from
Montreal
Fly to
Costa Mesa
Route
Depart
Return
Price
MontrealLos Angeles
YUL - LAX
YULLAX
Montreal Pierre Elliott Trudeau Intl
Wed 4/3
6:45 a.m.-12:39 p.m.
1 stop8h 54m
Los Angeles
Wed 18/3
1:40 p.m.-12:35 a.m.
1 stop7h 55m
C$ 563
MontrealLos Angeles
YUL - LAX
YULLAX
Montreal Pierre Elliott Trudeau Intl
Sat 6/12
7:00 a.m.-5:25 p.m.
2 stops13h 25m
Los Angeles
Sat 13/12
12:55 a.m.-3:16 p.m.
2 stops11h 21m
C$ 584
MontrealLos Angeles
YUL - LAX
YULLAX
Montreal Pierre Elliott Trudeau Intl
Sun 23/11
7:10 a.m.-2:52 p.m.
1 stop10h 42m
Los Angeles
Wed 26/11
10:30 p.m.-11:59 a.m.
1 stop10h 29m
C$ 584
MontrealLos Angeles
YUL - LAX
YULLAX
Montreal Pierre Elliott Trudeau Intl
Thu 27/11
6:00 a.m.-5:43 p.m.
2 stops14h 43m
Los Angeles
Mon 1/12
7:26 p.m.-2:00 p.m.
2 stops15h 34m
C$ 584
MontrealLos Angeles
YUL - LAX
YULLAX
Montreal Pierre Elliott Trudeau Intl
Wed 3/12
2:13 p.m.-9:51 p.m.
1 stop10h 38m
Los Angeles
Sat 6/12
12:25 a.m.-9:17 p.m.
1 stop17h 52m
C$ 584
MontrealLos Angeles
YUL - LAX
YULLAX
Montreal Pierre Elliott Trudeau Intl
Wed 17/12
12:40 p.m.-6:38 p.m.
1 stop8h 58m
Los Angeles
Mon 29/12
9:40 a.m.-11:19 p.m.
1 stop10h 39m
C$ 595
MontrealLos Angeles
YUL - LAX
YULLAX
Montreal Pierre Elliott Trudeau Intl
Sat 6/12
6:00 a.m.-11:52 a.m.
1 stop8h 52m
Los Angeles
Tue 6/1
6:45 p.m.-1:28 p.m.
2 stops15h 43m
C$ 595
MontrealLos Angeles
YUL - LAX
YULLAX
Montreal Pierre Elliott Trudeau Intl
Thu 4/12
6:00 a.m.-5:14 p.m.
1 stop14h 14m
Los Angeles
Fri 9/1
5:00 a.m.-9:42 p.m.
2 stops13h 42m
C$ 595
MontrealLos Angeles
YUL - LAX
YULLAX
Montreal Pierre Elliott Trudeau Intl
Sat 6/12
6:00 a.m.-5:25 p.m.
2 stops14h 25m
Los Angeles
Fri 9/1
5:00 a.m.-9:42 p.m.
2 stops13h 42m
C$ 595
MontrealLos Angeles
YUL - LAX
YULLAX
Montreal Pierre Elliott Trudeau Intl
Thu 4/12
3:00 p.m.-10:50 p.m.
1 stop10h 50m
Los Angeles
Wed 7/1
9:40 p.m.-2:00 p.m.
2 stops13h 20m
C$ 595
Flights are sorted by cheapest round-trip flights first.
Deals found on 1/11
Showing 1-10 of 22 results
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Best time to book a flight from Montreal to Costa Mesa
Have a flexible travel schedule? Discover the best time to fly to Costa Mesa 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 Costa Mesa
How far ahead should I book a flight from Montreal to Costa Mesa?
Use this chart to determine the optimal time to book a round-trip flight from Montreal to Costa Mesa. Price data was last updated on 31 October 2025.
The best time to book flights from Montreal to Costa Mesa is 56 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Montreal to Costa Mesa?
Currently, April is the cheapest month in which you can book a flight from Montreal to Costa Mesa (average of C$ 188). Flying from Montreal to Costa Mesa in December is currently the most expensive (average of C$ 335). 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 CM3?
Find hourly flight availability from Montreal to Costa Mesa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 November 2025.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 18% on flights from Montreal to Costa Mesa by exploring options for tickets at noon.
What is the cheapest day to fly from Montreal to Costa Mesa?
Use this chart to determine the cheapest time to fly round-trip from Montreal to Costa Mesa. Price data was last updated on 16 December 2024.
Travelers seeking maximum savings on their Montreal to Costa Mesa flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Montreal to Costa Mesa
Explore weekly flight availability from Montreal to Costa Mesa. 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 3 November 2025.
The most flights from YMQ to CM3 are scheduled on a Sunday (7 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).
Reviews of airlines servicing Costa Mesa
Get insights into the airlines that provide service to Costa Mesa. 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 Costa Mesa. Reviews last updated 3 November 2025.
Get a feel of what it's like to fly with Porter Airlines,United Airlines, andAmerican Airlines from Montreal to Costa Mesa by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
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.
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.
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.
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.
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.
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 Costa Mesa. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
How long is the flight from Montreal to Costa Mesa?
Porter Airlines, United Airlines, and Delta can get you from Montreal to Costa Mesa in just under 8h 54m. Your travel time can differ by up to 4h 31m. Montreal and Costa Mesa are separated by a distance of 3969 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the most reliable airlines from Montreal to Costa Mesa?
Before booking your flight to Costa Mesa from Montreal, check out the most reliable airlines to get you to your destination on time: United Airlines (80%), Brussels Airlines (76%), Air New Zealand( 73%).
What are the cheapest flights from Montreal to Costa Mesa?
Looking for the cheapest flight from Montreal to Costa Mesa? While on average our users pay C$ 971, our data indicates the cheapest price to be C$ 255. The most popular route (Montreal Pierre Elliott Trudeau Intl - Los Angeles), is priced around C$ 448.
Can I find deals for business class flights from Montreal to Costa Mesa?
Yes. Cheapflights offers flight deals from Montreal to Costa Mesa 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 Costa Mesa?
Currently, April is the cheapest month in which you can book a flight from Montreal to Costa Mesa (average of C$ 188). Flying from Montreal to Costa Mesa in December is currently the most expensive (average of C$ 335). 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.
Browse through other flights departing from Montreal. Flights are based on user searches made on Cheapflights and were last updated on 3 November 2025.
Discover the top 6 airlines that operate flights from Montreal to Costa Mesa. 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 3 November 2025.
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 Costa Mesa?
Cheapflights helps you search for flights from Montreal to Costa Mesa 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 Costa Mesa?
Millions of users choose and trust Cheapflights to book the best flight deals from Montreal to Costa Mesa for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
Can Cheapflights find flights from Montreal to Costa Mesa with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from Montreal to Costa Mesa, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from Montreal to Costa Mesa become cheaper?
Not ready to book yet? You can track prices for flights from Montreal to Costa Mesa on Cheapflights with our Price Alert feature and get notified when better prices are available.
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