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Cheap flights from Montreal to Costa Mesa from C$ 191

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 21/5. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LAX
27 Apr — 4 May1
1 adult

Cheapflights Tip: The best prices from Montreal to Costa Mesa are usually found in April or September, booked 89 days in advance, depart on a Thursday or Wednesday and return on a Saturday

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 22 April 2025.

Round-trip from

C$ 315

One-way from

C$ 191

Popular in

December

Cheapest in

April

Average price

C$ 470
Porter Airlines
  • Porter Airlines
  • 2/6-9/6
  • 2 total stops
  • 16h 02m total
  • Montreal to Costa Mesa
WestJet
  • WestJet
  • 8/5
  • 2 total stops
  • 13h 32m total
  • Montreal to Costa Mesa
Highest demand for flights based on searches. 8% potential increase in price (C$ 69 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease (C$ 24 potential savings vs. average RT price).
Average for round-trip flights in April 2025

Find flight deals from Montreal to Costa Mesa

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 22 April 2025.

Thu 12/67:00 a.m.YUL - LAX
2 stops14h 10mWestJet
Sun 22/69:10 p.m.LAX - YUL
2 stops16h 17mWestJet
Deal found 22/4C$ 317
Mon 28/76:45 a.m.YUL - LAX
1 stop9h 15mMultiple Airlines
Sat 2/811:10 p.m.LAX - YUL
1 stop22h 27mMultiple Airlines
Deal found 22/4C$ 318
Wed 6/86:45 a.m.YUL - LAX
1 stop9h 15mPorter Airlines
Tue 19/82:00 p.m.LAX - YUL
1 stop7h 37mPorter Airlines
Deal found 22/4C$ 321
Thu 5/69:45 a.m.YUL - LAX
2 stops10h 52mAir Canada
Fri 6/65:05 a.m.LAX - YUL
1 stop15h 21mAir Canada
Deal found 21/4C$ 373
Tue 6/54:45 p.m.YUL - LAX
1 stop30h 46mUnited Airlines
Thu 8/58:05 a.m.LAX - YUL
Nonstop5h 11mUnited Airlines
Deal found 21/4C$ 406
Tue 9/912:45 p.m.YUL - LAX
1 stop8h 35mDelta
Mon 15/910:50 p.m.LAX - YUL
1 stop9h 54mDelta
Deal found 22/4C$ 415
Thu 8/52:35 p.m.YUL - LAX
1 stop11h 40mAmerican Airlines
Wed 14/512:55 a.m.LAX - YUL
1 stop11h 30mAmerican Airlines
Deal found 21/4C$ 516

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 22 April 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

Mon 2/6

6:45 a.m.-12:10 p.m.

1 stop8h 25m

Los Angeles

Mon 9/6

2:00 p.m.-12:37 a.m.

1 stop7h 37m

C$ 315

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

Wed 7/5

6:45 a.m.-5:17 p.m.

2 stops13h 32m

Los Angeles

Tue 13/5

1:10 p.m.-12:37 a.m.

1 stop8h 27m

C$ 317

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

Tue 15/7

7:00 a.m.-8:23 p.m.

2 stops16h 23m

Los Angeles

Tue 22/7

9:10 p.m.-12:43 a.m.

2 stops24h 33m

C$ 318

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

Sat 10/5

8:00 p.m.-11:07 p.m.

Nonstop6h 07m

Los Angeles

Sun 11/5

10:55 a.m.-11:26 p.m.

2 stops9h 31m

C$ 369

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

Sat 24/5

4:45 p.m.-12:26 p.m.

1 stop22h 41m

Los Angeles

Sun 25/5

12:20 a.m.-10:40 a.m.

1 stop7h 20m

C$ 384

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

Fri 9/5

6:45 p.m.-12:49 a.m.

1 stop9h 04m

Los Angeles

Sun 11/5

5:35 a.m.-4:15 p.m.

1 stop7h 40m

C$ 415

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

Sat 10/5

7:29 a.m.-3:18 p.m.

2 stops10h 49m

Los Angeles

Wed 14/5

12:55 a.m.-3:25 p.m.

1 stop11h 30m

C$ 511

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

Wed 21/5

6:45 a.m.-5:17 p.m.

2 stops13h 32m

C$ 191

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

Tue 9/9

6:45 a.m.-1:00 p.m.

1 stop9h 15m

C$ 209

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

Mon 9/6

8:05 a.m.-11:12 a.m.

Nonstop6h 07m

C$ 242

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/4

Showing 1-10 of 14 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 18 April 2025.

The best time to book flights from Montreal to Costa Mesa is 89 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, September is the cheapest month in which you can book a flight from Montreal to Costa Mesa (average of C$ 230). Flying from Montreal to Costa Mesa in July is currently the most expensive (average of C$ 314). 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 22 April 2025.

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.

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 at noon when fares are most often at their lowest. Sunday 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 22 April 2025.

The most flights from YMQ to CM3 are scheduled on a Monday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

Rainfall in Costa Mesa by month

Plan your trip to Costa Mesa by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Costa Mesa ranges from 0.0 - 87.0 mm per month. February is typically the wettest month, when rainfall can reach 87.0 mm. July is typically the driest time to visit Costa Mesa when rainfall is around 0.0 mm.

Temperature in Costa Mesa by month

Plan your trip to Costa Mesa by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Costa Mesa, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 14.0 C).

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 22 April 2025.
Read through reviews of airlines operating flights from Montreal to Costa Mesa, such as Porter Airlines, Delta and United Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.8

Boarding

8.2

Entertainment

7.0

Comfort

8.1

Food

7.6

Overall

8.0

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Crew

8.8

Boarding

8.2

Entertainment

7.0

Comfort

8.1

Food

7.6

Overall

8.0

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
8.0
Very good

Crew

8.8

Boarding

8.2

Entertainment

7.0

Comfort

8.1

Food

7.6

Overall

8.0

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Crew

8.8

Boarding

8.2

Entertainment

7.0

Comfort

8.1

Food

7.6

Overall

8.0

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Crew

8.8

Boarding

8.2

Entertainment

7.0

Comfort

8.1

Food

7.6

Overall

8.0

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Crew

8.8

Boarding

8.2

Entertainment

7.0

Comfort

8.1

Food

7.6

Overall

8.0

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

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.
  • 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$ 191 on WestJet. Other airlines that offer cheap prices include Porter Airlines from C$ 209 and Air Canada from C$ 242 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: Brussels Airlines (89%), Air Canada (84%), United Airlines( 84%).

  • 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$ 517, our data indicates the cheapest price to be C$ 240. The most popular route (Montreal Pierre Elliott Trudeau Intl - Los Angeles), is priced around C$ 236.

  • Can I find deals for flights from Montreal to Costa Mesa that include hotel bookings?

    Yes. In addition to deals on Montreal to Costa Mesa flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Montreal to Costa Mesa?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Montreal to Costa Mesa.

  • 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, September is the cheapest month in which you can book a flight from Montreal to Costa Mesa (average of C$ 230). Flying from Montreal to Costa Mesa in July is currently the most expensive (average of C$ 314). 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

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Alternative routes for Montreal to Costa Mesa

See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from Montreal to Costa Mesa

Discover the top 7 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 22 April 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 270AverageC$ 463FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Porter AirlinesCheapestC$ 307AverageC$ 473FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 373AverageC$ 637FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 384AverageC$ 598FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 396AverageC$ 688FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapestC$ 419AverageC$ 545FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air TransatCheapestC$ 509AverageC$ 559FlexibilityNo cancel feeOn-time50%
Search Air Transat flights

Fly with Cheapflights

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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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