Cheap flights from Montreal to Costa Mesa from C$ 370
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 22/9. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LAX
26 Sep — 3 Oct1
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 January or September, booked 81 days in advance, depart on a Friday or Thursday and return on a Saturday
Cheap flight deals from Montreal to Costa Mesa
Enter your travel dates to find the best prices.
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Best
Direct
Last-minute
One-way
Cheapest flights from Montreal to Costa Mesa
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 27 August 2026.
Fri 20/115:55 p.m. -
2 stops21h 39m
Mon 30/111:35 p.m. -
1 stop8h 00m
Deal found 27/8C$ 559
Fri 11/96:45 a.m. -
1 stop9h 35m
Mon 14/92:15 p.m. -
1 stop7h 22m
Deal found 26/8C$ 560
Sat 24/107:15 a.m. -
1 stop9h 50m
Sat 28/117:30 a.m. -
2 stops14h 00m
Deal found 26/8C$ 562
Thu 10/96:45 a.m. -
2 stops13h 25m
Fri 11/96:05 p.m. -
1 stop10h 00m
Deal found 26/8C$ 563
Thu 10/96:00 p.m. -
1 stop27h 03m
Fri 11/910:30 p.m. -
Nonstop5h 14m
Deal found 26/8C$ 567
Wed 28/106:45 a.m. -
1 stop8h 49m
Sat 28/111:35 p.m. -
1 stop8h 00m
Deal found 26/8C$ 569
Sun 18/108:00 p.m. -
1 stop19h 25m
Wed 21/106:05 p.m. -
1 stop10h 00m
Deal found 25/8C$ 570
Fri 30/106:45 a.m. -
1 stop8h 49m
Fri 6/111:35 p.m. -
1 stop8h 00m
Deal found 25/8C$ 571
Tue 27/106:45 a.m. -
1 stop8h 49m
Mon 2/117:30 a.m. -
2 stops20h 30m
Deal found 25/8C$ 573
Wed 28/106:45 a.m. -
1 stop8h 49m
Thu 26/111:35 p.m. -
1 stop8h 00m
Deal found 26/8C$ 574
Fri 11/98:00 p.m. -
1 stop21h 05m
Wed 16/96:05 p.m. -
1 stop10h 00m
Deal found 24/8C$ 575
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 27 August 2026.
Tue 2/26:45 a.m. -
1 stop8h 49m
Wed 3/21:35 p.m. -
1 stop8h 00m
Deal found 27/8C$ 599
Fri 6/117:00 a.m. -
2 stops13h 39m
Sat 14/1111:59 p.m. -
2 stops10h 29m
Deal found 22/8C$ 811
Sat 10/106:35 p.m. -
1 stop17h 02m
Tue 20/1012:25 p.m. -
Nonstop5h 20m
Deal found 23/8C$ 811
Tue 13/106:00 a.m. -
2 stops20h 55m
Fri 30/105:30 a.m. -
2 stops14h 52m
Deal found 22/8C$ 828
Thu 21/16:45 a.m. -
1 stop8h 49m
Wed 3/31:35 p.m. -
1 stop8h 00m
Deal found 26/8C$ 600
Thu 28/16:45 a.m. -
1 stop8h 49m
Mon 1/31:35 p.m. -
1 stop8h 00m
Deal found 26/8C$ 600
Tue 29/96:45 a.m. -
1 stop9h 30m
Fri 2/102:15 p.m. -
1 stop7h 22m
Deal found 27/8C$ 642
Fri 6/112:13 p.m. -
1 stop11h 39m
Sat 14/118:30 a.m. -
Nonstop5h 15m
Deal found 22/8C$ 811
Sat 10/105:10 p.m. -
1 stop8h 25m
Fri 30/105:30 a.m. -
2 stops14h 52m
Deal found 22/8C$ 849
Thu 15/106:45 a.m. -
1 stop9h 35m
Wed 28/101:35 p.m. -
1 stop8h 00m
Deal found 22/8C$ 653
Sat 17/109:15 a.m. -
1 stop9h 04m
Sat 24/1010:40 p.m. -
Nonstop5h 14m
Deal found 24/8C$ 811
Tue 23/26:45 a.m. -
1 stop8h 49m
Fri 5/31:35 p.m. -
1 stop8h 00m
Deal found 24/8C$ 678
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 27 August 2026.
Thu 17/94:55 p.m. -
Nonstop5h 59m
Wed 23/910:30 p.m. -
Nonstop5h 14m
Deal found 27/8C$ 691
Tue 27/108:00 a.m. -
Nonstop6h 24m
Thu 5/118:30 a.m. -
Nonstop5h 15m
Deal found 27/8C$ 692
Wed 23/96:30 p.m. -
Nonstop6h 01m
Wed 30/910:30 p.m. -
Nonstop5h 14m
Deal found 25/8C$ 695
Fri 18/94:55 p.m. -
Nonstop5h 59m
Sun 20/912:25 p.m. -
Nonstop5h 20m
Deal found 26/8C$ 703
Mon 21/94:55 p.m. -
Nonstop5h 59m
Fri 25/912:25 p.m. -
Nonstop5h 20m
Deal found 24/8C$ 707
Mon 14/96:30 p.m. -
Nonstop6h 01m
Sun 20/912:25 p.m. -
Nonstop5h 20m
Deal found 24/8C$ 709
Mon 28/94:55 p.m. -
Nonstop5h 59m
Mon 5/1012:25 p.m. -
Nonstop5h 20m
Deal found 26/8C$ 714
Fri 20/116:15 p.m. -
Nonstop6h 24m
Mon 30/118:30 a.m. -
Nonstop5h 15m
Deal found 27/8C$ 716
Mon 23/116:15 p.m. -
Nonstop6h 24m
Mon 30/118:30 a.m. -
Nonstop5h 15m
Deal found 26/8C$ 720
Last-minute flights from Montreal to Costa Mesa
Discover last-minute flight deals from Montreal to Costa Mesa. Data last updated 27 August 2026 and is based on user searches.
Tue 8/96:45 a.m. -
2 stops13h 25m
Tue 15/96:05 p.m. -
1 stop10h 00m
Deal found 27/8C$ 574
Wed 9/96:45 a.m. -
2 stops13h 25m
Tue 15/96:05 p.m. -
1 stop10h 00m
Deal found 27/8C$ 570
Wed 9/97:15 a.m. -
2 stops11h 45m
Wed 23/97:30 a.m. -
2 stops13h 55m
Deal found 26/8C$ 580
Thu 10/96:45 a.m. -
2 stops13h 25m
Fri 11/96:05 p.m. -
1 stop10h 00m
Deal found 26/8C$ 563
Thu 10/96:00 p.m. -
1 stop27h 03m
Fri 11/910:30 p.m. -
Nonstop5h 14m
Deal found 26/8C$ 567
Thu 10/96:45 a.m. -
2 stops13h 25m
Tue 15/96:05 p.m. -
1 stop10h 00m
Deal found 25/8C$ 571
Fri 11/96:45 a.m. -
1 stop9h 35m
Mon 14/92:15 p.m. -
1 stop7h 22m
Deal found 26/8C$ 560
Fri 11/98:00 p.m. -
1 stop21h 05m
Wed 16/96:05 p.m. -
1 stop10h 00m
Deal found 24/8C$ 575
Fri 11/96:45 a.m. -
2 stops13h 25m
Tue 15/96:05 p.m. -
1 stop10h 00m
Deal found 24/8C$ 578
Wed 16/96:45 a.m. -
2 stops13h 25m
Tue 22/96:05 p.m. -
1 stop10h 00m
Deal found 25/8C$ 577
Wed 16/97:15 a.m. -
2 stops11h 45m
Wed 30/97:30 a.m. -
2 stops13h 55m
Deal found 23/8C$ 581
Fri 18/96:45 a.m. -
1 stop9h 30m
Sat 19/92:15 p.m. -
1 stop7h 22m
Deal found 24/8C$ 582
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 27 August 2026.
Tue 22/98:00 p.m. -
3 stops23h 00m
Deal found 22/8C$ 370
Tue 8/95:45 p.m. -
2 stops26h 25m
Deal found 24/8C$ 373
Sun 6/96:45 a.m. -
1 stop9h 35m
Deal found 24/8C$ 374
Sun 18/106:45 a.m. -
3 stops28h 04m
Deal found 22/8C$ 379
Sun 1/116:45 a.m. -
1 stop8h 49m
Deal found 24/8C$ 380
Thu 24/96:45 a.m. -
3 stops43h 19m
Deal found 26/8C$ 384
Sun 20/96:30 p.m. -
Nonstop6h 01m
Deal found 25/8C$ 386
Wed 7/107:15 a.m. -
1 stop12h 55m
Deal found 27/8C$ 387
Mon 19/108:20 a.m. -
Nonstop6h 00m
Deal found 27/8C$ 388
Find 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 27 August 2026.
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 7,457,451 searches. Data last updated 27 August 2026.
Use the filters below to find and compare flights from Montreal to Costa Mesa that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest round-trip
MontrealLos Angeles
YUL Montreal Pierre Elliott Trudeau Intl - LAX Los Angeles
YULLAX
Montreal Pierre Elliott Trudeau Intl
Tue 2/2
6:45 a.m.-12:34 p.m.
1 stop8h 49m
Los Angeles
Wed 3/2
1:35 p.m.-12:35 a.m.
1 stop8h 00m
C$ 599
MontrealLos Angeles
YUL Montreal Pierre Elliott Trudeau Intl - LAX Los Angeles
YULLAX
Montreal Pierre Elliott Trudeau Intl
Thu 21/1
6:45 a.m.-12:34 p.m.
1 stop8h 49m
Los Angeles
Wed 3/3
1:35 p.m.-12:35 a.m.
1 stop8h 00m
C$ 600
MontrealLos Angeles
YUL Montreal Pierre Elliott Trudeau Intl - LAX Los Angeles
YULLAX
Montreal Pierre Elliott Trudeau Intl
Thu 28/1
6:45 a.m.-12:34 p.m.
1 stop8h 49m
Los Angeles
Mon 1/3
1:35 p.m.-12:35 a.m.
1 stop8h 00m
C$ 600
MontrealLos Angeles
YUL Montreal Pierre Elliott Trudeau Intl - LAX Los Angeles
YULLAX
Montreal Pierre Elliott Trudeau Intl
Tue 29/9
6:45 a.m.-1:15 p.m.
1 stop9h 30m
Los Angeles
Fri 2/10
2:15 p.m.-12:37 a.m.
1 stop7h 22m
C$ 642
MontrealLos Angeles
YUL Montreal Pierre Elliott Trudeau Intl - LAX Los Angeles
YULLAX
Montreal Pierre Elliott Trudeau Intl
Thu 15/10
6:45 a.m.-1:20 p.m.
1 stop9h 35m
Los Angeles
Wed 28/10
1:35 p.m.-12:35 a.m.
1 stop8h 00m
C$ 653
MontrealLos Angeles
YUL Montreal Pierre Elliott Trudeau Intl - LAX Los Angeles
YULLAX
Montreal Pierre Elliott Trudeau Intl
Tue 23/2
6:45 a.m.-12:34 p.m.
1 stop8h 49m
Los Angeles
Fri 5/3
1:35 p.m.-12:35 a.m.
1 stop8h 00m
C$ 678
MontrealLos Angeles
YUL Montreal Pierre Elliott Trudeau Intl - LAX Los Angeles
YULLAX
Montreal Pierre Elliott Trudeau Intl
Fri 6/11
7:00 a.m.-5:39 p.m.
2 stops13h 39m
Los Angeles
Sat 14/11
11:59 p.m.-1:28 p.m.
2 stops10h 29m
C$ 811
MontrealLos Angeles
YUL Montreal Pierre Elliott Trudeau Intl - LAX Los Angeles
YULLAX
Montreal Pierre Elliott Trudeau Intl
Sat 10/10
6:35 p.m.-8:37 a.m.
1 stop17h 02m
Los Angeles
Tue 20/10
12:25 p.m.-8:45 p.m.
Nonstop5h 20m
C$ 811
MontrealLos Angeles
YUL Montreal Pierre Elliott Trudeau Intl - LAX Los Angeles
YULLAX
Montreal Pierre Elliott Trudeau Intl
Fri 6/11
2:13 p.m.-10:52 p.m.
1 stop11h 39m
Los Angeles
Sat 14/11
8:30 a.m.-4:45 p.m.
Nonstop5h 15m
C$ 811
Quickest round-trip
MontrealLos Angeles
YUL Montreal Pierre Elliott Trudeau Intl - LAX Los Angeles
YULLAX
Montreal Pierre Elliott Trudeau Intl
Sat 17/10
9:15 a.m.-3:19 p.m.
1 stop9h 04m
Los Angeles
Sat 24/10
10:40 p.m.-6:54 a.m.
Nonstop5h 14m
C$ 811
Flights are sorted by cheapest round-trip flights first.
Deals found on 24/8
Showing 1-10 of 21 resultsSorted by cheapest first
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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.
YUL-LAX
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
YMQ-CM3
YUL-LAX
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 27 August 2026.
When flying from Montreal to Costa Mesa, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
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 27 August 2026.
The most flights from YMQ to CM3 are scheduled on a Monday (10 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (10 on average).
How much does it cost to fly round-trip from Montreal to Costa Mesa?
Airfare is typical for this route at the moment.
Montreal to Costa Mesa flights typically cost between C$ 459 and C$ 745 in September.The cheapest round-trip price found within the last 5 days was C$ 560 on Porter Airlines (11 Sep-14 Sep).
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 27 August 2026.
Get a feel of what it's like to fly with Porter Airlines,Delta, andUnited 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.
My first flight with an all female flight crew who were the best ever.
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 can get you from Montreal to Costa Mesa in just under 8h 49m. Your travel time can differ by up to . Montreal and Costa Mesa are separated by a distance of 3969 km.
What are the cheapest airlines to fly from Montreal to Costa Mesa one-way?
One-way options have recently been found by users for as low as C$ 222 on WestJet. Other airlines that offer cheap prices include American Airlines from C$ 246 and Porter Airlines from C$ 246 one-way.
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: Air Canada (60%), United Airlines (58%), Air New Zealand( 58%).
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$ 3,645, our data indicates the cheapest price to be C$ 351. The most popular route (Montreal Pierre Elliott Trudeau Intl - Los Angeles), is priced around C$ 487.
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.
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 7,457,451 searches. Data last updated 27 August 2026.
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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