Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Montreal to Costa Mesa from C$ 185

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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LAX
5 mai — 12 mai1
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 30 abril 2025.

Round-trip from

C$ 300

One-way from

C$ 185

Popular in

December

Cheapest in

April

Average price

C$ 471
Porter Airlines
  • Porter Airlines
  • 21/5-28/5
  • 2 total stops
  • 16h 52m total
  • Montreal to Costa Mesa
Search Deals
Porter Airlines
  • Porter Airlines
  • 9/6
  • 1 total stop
  • 9h 20m total
  • Montreal to Costa Mesa
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 71 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 30 abril 2025.

qua 21/56:45 a.m.YUL - LAX
1 stop8h 25mPorter Airlines
qua 28/51:10 p.m.LAX - YUL
1 stop8h 27mPorter Airlines
Deal found 29/4C$ 300
ter 15/77:00 a.m.YUL - LAX
1 stop10h 12mWestJet
ter 22/77:00 a.m.LAX - YUL
2 stops14h 37mWestJet
Deal found 28/4C$ 306
ter 22/77:00 a.m.YUL - LAX
1 stop10h 12mMultiple Airlines
ter 29/72:00 p.m.LAX - YUL
1 stop7h 37mMultiple Airlines
Deal found 29/4C$ 323
qua 21/53:30 p.m.YUL - LAX
1 stop8h 29mAir Canada
qua 28/512:05 p.m.LAX - YUL
Nonstop5h 25mAir Canada
Deal found 29/4C$ 466
ter 13/56:15 a.m.YUL - LAX
1 stop8h 11mDelta
sáb 17/512:59 a.m.LAX - YUL
1 stop8h 01mDelta
Deal found 29/4C$ 473
qui 22/54:45 p.m.YUL - LAX
Nonstop6h 05mUnited Airlines
seg 26/512:05 p.m.LAX - YUL
Nonstop5h 25mUnited Airlines
Deal found 29/4C$ 508
qui 15/58:00 p.m.YUL - LAX
Nonstop6h 07mBrussels Airlines
sáb 24/58:05 a.m.LAX - YUL
Nonstop5h 11mBrussels Airlines
Deal found 29/4C$ 518

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 30 abril 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

qua 21/5

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

1 stop8h 25m

Los Angeles

qua 28/5

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

1 stop8h 27m

C$ 300

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

ter 15/7

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

2 stops16h 23m

Los Angeles

ter 22/7

7:00 a.m.-12:37 a.m.

2 stops14h 37m

C$ 306

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

ter 22/7

7:00 a.m.-2:12 p.m.

1 stop10h 12m

Los Angeles

ter 29/7

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

1 stop7h 37m

C$ 323

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

qua 21/5

3:30 p.m.-8:59 p.m.

1 stop8h 29m

Los Angeles

qua 28/5

12:05 p.m.-8:30 p.m.

Nonstop5h 25m

C$ 466

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

ter 13/5

6:15 a.m.-11:26 a.m.

1 stop8h 11m

Los Angeles

sáb 17/5

12:59 a.m.-12:00 p.m.

1 stop8h 01m

C$ 473

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

qui 22/5

4:45 p.m.-7:50 p.m.

Nonstop6h 05m

Los Angeles

seg 26/5

12:05 p.m.-8:30 p.m.

Nonstop5h 25m

C$ 508

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

qui 15/5

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

Nonstop6h 07m

Los Angeles

sáb 24/5

8:05 a.m.-4:16 p.m.

Nonstop5h 11m

C$ 518

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

seg 9/6

6:45 a.m.-1:05 p.m.

1 stop9h 20m

C$ 185

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

ter 1/7

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

2 stops14h 25m

C$ 192

MontrealLos Angeles

YUL - LAX

YULLAX

Montreal Pierre Elliott Trudeau Intl

qui 22/5

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

Nonstop6h 00m

C$ 266

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/4

Showing 1-10 of 15 results
1
2

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 25 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$ 224). Flying from Montreal to Costa Mesa in July is currently the most expensive (average of C$ 310). 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 30 abril 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.

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 30 abril 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.
Porter Airlines
8.0
Very good
285 reviews
Check prices

Boarding

8.2

Crew

8.8

Entertainment

7.0

Overall

8.0

Food

7.6

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Porter Airlines
8.0
Very good
285 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Boarding

8.2

Crew

8.8

Entertainment

7.0

Overall

8.0

Food

7.6

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Delta
8.0
Very good
7,929 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Boarding

8.2

Crew

8.8

Entertainment

7.0

Overall

8.0

Food

7.6

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
United Airlines
7.4
Good
8,696 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Boarding

8.2

Crew

8.8

Entertainment

7.0

Overall

8.0

Food

7.6

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Brussels Airlines
7.4
Good
346 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Boarding

8.2

Crew

8.8

Entertainment

7.0

Overall

8.0

Food

7.6

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
American Airlines
7.2
Good
10,000 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Boarding

8.2

Crew

8.8

Entertainment

7.0

Overall

8.0

Food

7.6

Comfort

8.1

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$ 185 on Porter Airlines. Other airlines that offer cheap prices include WestJet from C$ 192 and Air Canada from C$ 266 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$ 464, our data indicates the cheapest price to be C$ 261. The most popular route (Montreal Pierre Elliott Trudeau Intl - Los Angeles), is priced around C$ 257.

  • 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$ 224). Flying from Montreal to Costa Mesa in July is currently the most expensive (average of C$ 310). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Montreal to Costa Mesa

See prices for flight routes from nearby airports that may be better suited for you.
Pierre Elliott Trudeau Intl to Las Vegas flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Pierre Elliott Trudeau Intl to San Francisco flights
Pierre Elliott Trudeau Intl to San Diego flights
Pierre Elliott Trudeau Intl to Ontario flights
Ottawa to Las Vegas flights
Québec City to Las Vegas flights
Québec City to Los Angeles flights
Ottawa to San Francisco flights
Pierre Elliott Trudeau Intl to Santa Ana flights
Ottawa to Los Angeles flights
Pierre Elliott Trudeau Intl to Sacramento flights
Québec City to San Francisco flights
Pierre Elliott Trudeau Intl to San Jose flights
Pierre Elliott Trudeau Intl to Burbank flights
Québec City to San Diego flights
Ottawa to Ontario flights
Ottawa to San Diego flights
Pierre Elliott Trudeau Intl to Long Beach flights
Ottawa to San Jose flights
Pierre Elliott Trudeau Intl to Palm Springs flights
Pierre Elliott Trudeau Intl to Tijuana flights
Québec City to Ontario flights
Pierre Elliott Trudeau Intl to Reno flights
Québec City to Sacramento flights
Ottawa to Sacramento flights
Québec City to Palm Springs flights
Ottawa to Santa Ana flights
Pierre Elliott Trudeau Intl to Oakland flights
Québec City to Santa Ana flights
Québec City to San Jose flights
Ottawa to Santa Barbara flights
Ottawa to Palm Springs flights
Pierre Elliott Trudeau Intl to Santa Barbara flights
Québec City to Oakland flights
Ottawa to Oakland flights
Pierre Elliott Trudeau Intl to Mexicali flights
Pierre Elliott Trudeau Intl to Monterey flights
Québec City to Long Beach flights
Ottawa to Long Beach flights
Saguenay to Las Vegas flights
Pierre Elliott Trudeau Intl to Fresno flights
Pierre Elliott Trudeau Intl to San Luis Obispo flights
Ottawa to Burbank flights
Pierre Elliott Trudeau Intl to Merced flights

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 30 abril 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 270AverageC$ 460FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Porter AirlinesCheapestC$ 307AverageC$ 470FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 373AverageC$ 584FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 378AverageC$ 669FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 384AverageC$ 598FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapestC$ 420AverageC$ 545FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air TransatCheapestC$ 509AverageC$ 560FlexibilityNo cancel feeOn-time50%
Search Air Transat 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 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.