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Cheap flights from Toronto to Costa Mesa from C$ 183

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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — LAX
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Toronto to Costa Mesa are usually found in May or September, booked 88 days in advance, depart on a Thursday or Friday and return on a Friday

Cheap flight deals from Toronto to Costa Mesa

Keep the following information in mind while searching for Toronto to Costa Mesa flight deals. Data was last updated 30 October 2025.

Round-trip from

C$ 306

One-way from

C$ 183

Popular in

December

Cheapest in

May

Average price

C$ 397
Air Canada
  • Air Canada
  • 3/12-9/12
  • Nonstop
  • 10h 18m total
  • Toronto to Costa Mesa
Search Deals
Porter Airlines
  • Porter Airlines
  • 12/12
  • Nonstop
  • 5h 36m total
  • Toronto to Costa Mesa
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from Toronto to Costa Mesa

Enter your travel dates to find the best prices.

Cheapest flights from Toronto to Costa Mesa
Explore the most affordable flight options available from Toronto to Costa Mesa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 October 2025.

Thu 4/124:55 p.m.YYZ - LAX
Nonstop5h 32mAir Canada
Wed 10/1211:35 a.m.LAX - YYZ
Nonstop4h 40mAir Canada
Deal found 30/10C$ 310
Thu 27/1110:00 a.m.YYZ - LAX
Nonstop5h 36mPorter Airlines
Thu 4/121:40 p.m.LAX - YYZ
Nonstop4h 43mPorter Airlines
Deal found 28/10C$ 311
Thu 4/1210:00 a.m.YYZ - LAX
Nonstop5h 36mPorter Airlines
Wed 10/121:40 p.m.LAX - YYZ
Nonstop4h 43mPorter Airlines
Deal found 29/10C$ 313
Wed 3/1210:00 a.m.YYZ - LAX
Nonstop5h 36mPorter Airlines
Tue 9/121:40 p.m.LAX - YYZ
Nonstop4h 43mPorter Airlines
Deal found 29/10C$ 318
Thu 27/1110:00 a.m.YYZ - LAX
Nonstop5h 36mPorter Airlines
Wed 3/121:40 p.m.LAX - YYZ
Nonstop4h 43mPorter Airlines
Deal found 28/10C$ 320
Thu 27/119:40 a.m.YYZ - LAX
2 stops11h 52mWestJet
Wed 3/1212:15 p.m.LAX - YYZ
1 stop9h 11mWestJet
Deal found 28/10C$ 327
Tue 2/1210:00 a.m.YYZ - LAX
Nonstop5h 36mPorter Airlines
Fri 5/121:40 p.m.LAX - YYZ
Nonstop4h 43mPorter Airlines
Deal found 27/10C$ 331
Mon 17/113:30 p.m.YTZ - LAX
1 stop9h 45mAir Canada
Wed 10/128:20 a.m.LAX - YTZ
1 stop10h 15mAir Canada
Deal found 30/10C$ 359
Tue 18/1112:30 p.m.YTZ - LAX
1 stop12h 45mAir Canada
Tue 9/128:20 a.m.LAX - YTZ
1 stop10h 15mAir Canada
Deal found 30/10C$ 405
Thu 27/1112:30 p.m.YTZ - LAX
1 stop12h 45mAir Canada
Thu 4/128:20 a.m.LAX - YTZ
1 stop10h 15mAir Canada
Deal found 30/10C$ 406
Thu 27/116:20 a.m.YKF - LAX
1 stop13h 38mWestJet
Wed 3/1211:50 a.m.LAX - YKF
2 stops14h 38mWestJet
Deal found 28/10C$ 431
Fri 5/122:30 p.m.YTZ - LAX
1 stop12h 22mMultiple Airlines
Sun 7/126:05 p.m.LAX - YTZ
1 stop16h 37mMultiple Airlines
Deal found 28/10C$ 433

Cheapflights Fare Finder

 
Customize your flight search to find flights from Toronto 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 October 2025.
Use the filters below to find and compare flights from Toronto to Costa Mesa that are best for you.

Fly from

Toronto

Fly to

Costa Mesa

Route

Depart

Return

Price

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Thu 19/2

6:20 a.m.-10:03 p.m.

1 stop18h 43m

Los Angeles

Wed 18/3

5:45 p.m.-5:29 a.m.

1 stop8h 44m

C$ 377

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Thu 4/12

12:13 p.m.-5:55 p.m.

1 stop8h 42m

Los Angeles

Wed 10/12

7:15 a.m.-9:58 p.m.

1 stop11h 43m

C$ 390

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Thu 19/2

6:20 a.m.-7:52 p.m.

2 stops16h 32m

Los Angeles

Fri 27/2

5:45 p.m.-5:29 a.m.

1 stop8h 44m

C$ 402

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Tue 17/2

6:20 a.m.-11:00 a.m.

2 stops31h 40m

Los Angeles

Sun 1/3

11:50 a.m.-5:29 a.m.

2 stops14h 39m

C$ 409

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Sat 14/2

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

2 stops19h 00m

Los Angeles

Fri 20/2

11:50 a.m.-5:29 a.m.

2 stops14h 39m

C$ 411

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Tue 25/11

12:08 p.m.-8:39 p.m.

1 stop11h 31m

Los Angeles

Wed 10/12

6:15 a.m.-5:02 p.m.

1 stop7h 47m

C$ 412

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Mon 16/2

6:20 a.m.-11:00 a.m.

2 stops31h 40m

Los Angeles

Fri 20/2

11:50 a.m.-5:29 a.m.

2 stops14h 39m

C$ 427

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Wed 21/1

4:45 p.m.-10:59 p.m.

1 stop9h 14m

Los Angeles

Sun 25/1

7:00 a.m.-3:35 p.m.

1 stop29h 35m

C$ 430

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Thu 27/11

6:20 a.m.-4:58 p.m.

1 stop13h 38m

Los Angeles

Wed 3/12

11:50 a.m.-5:28 a.m.

2 stops14h 38m

C$ 431

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Thu 13/11

6:30 a.m.-11:01 a.m.

1 stop7h 31m

Los Angeles

Mon 17/11

9:45 p.m.-11:18 a.m.

1 stop10h 33m

C$ 433

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/10

Showing 1-10 of 60 results
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Best time to book a flight from Toronto to Costa Mesa

Have a flexible travel schedule? Discover the best time to fly to Costa Mesa from Toronto 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 Toronto to Costa Mesa

How far ahead should I book a flight from Toronto to Costa Mesa?

Use this chart to determine the optimal time to book a round-trip flight from Toronto to Costa Mesa. Price data was last updated on 24 October 2025.

The best time to book flights from Toronto to Costa Mesa is 88 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 Toronto to Costa Mesa?

Currently, August is the cheapest month in which you can book a flight from Toronto to Costa Mesa (average of C$ 112). Flying from Toronto to Costa Mesa in January is currently the most expensive (average of C$ 296). 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 YTO to CM3?

Find hourly flight availability from Toronto 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 October 2025.

It’s optimal to fly from Toronto to Costa Mesa in the evening. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from Toronto to Costa Mesa?

Use this chart to determine the cheapest time to fly round-trip from Toronto to Costa Mesa. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Toronto to Costa Mesa flight should consider departing on Thursday afternoons when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Toronto to Costa Mesa?

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 October 2025.
Read reviews from past customers who have flown Porter Airlines,Air Transat, andUnited Airlines from Toronto to Costa Mesa. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
384 reviews
Check prices

Overall

8.0

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

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.
Porter Airlines
8.0
Very good
384 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Overall

8.0

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

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.
Air Transat
7.8
Good
469 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Overall

8.0

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

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.
United Airlines
7.4
Good
8,996 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Overall

8.0

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

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.
WestJet
7.2
Good
3,152 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Overall

8.0

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

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.
Air Canada
7.1
Good
10,383 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Overall

8.0

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

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 Toronto 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 Toronto to Costa Mesa?

    There are many flights that can get you from Toronto to Costa Mesa in 8h 42m. Fly via WestJet, Delta, or Alaska Airlines to get the fastest option. The distance from Toronto to Costa Mesa is about 3492 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Toronto to Costa Mesa one-way?

    One-way options have recently been found by users for as low as C$ 208 on WestJet. Other airlines that offer cheap prices include Air Transat from C$ 228 and Delta from C$ 229 one-way.

  • What are the most popular routes from Toronto to Costa Mesa?

    While some choose either Toronto Island - Los Angeles or Toronto Region of Waterloo Intl - Los Angeles, Toronto Pearson Intl - Los Angeles is the most popular route from Toronto to Costa Mesa.

  • What are the most reliable airlines from Toronto to Costa Mesa?

    Consider Porter Airlines (87%), Air Transat (87%) or American Airlines (80%) when booking your flight. These represent the most reliable airlines when flying from Toronto to Costa Mesa.

  • What are the cheapest flights from Toronto to Costa Mesa?

    On average you can expect to pay C$ 1,768 for a flight from Toronto to Costa Mesa. The cheapest flight overall is C$ 145 while the most popular route, (Toronto Pearson Intl - Los Angeles) is currently priced at C$ 311.

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

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

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

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

  • Can I find deals for business class flights from Toronto to Costa Mesa?

    Yes. Cheapflights offers flight deals from Toronto 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 Toronto to Costa Mesa?

    Currently, August is the cheapest month in which you can book a flight from Toronto to Costa Mesa (average of C$ 112). Flying from Toronto to Costa Mesa in January is currently the most expensive (average of C$ 296). 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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Top 8 airlines flying from Toronto to Costa Mesa

Discover the top 8 airlines that operate flights from Toronto 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 October 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 134AverageC$ 560FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 199AverageC$ 574FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 231AverageC$ 448FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Porter AirlinesCheapestC$ 267AverageC$ 448FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 289AverageC$ 546FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 292AverageC$ 501FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air TransatCheapestC$ 296AverageC$ 533FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
APG AirlinesCheapestC$ 616AverageC$ 618FlexibilityNo cancel feeOn-timeN/A
Search APG 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 Toronto to Costa Mesa?

Cheapflights makes it easy to find Toronto to Costa Mesa flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Toronto to Costa Mesa?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Toronto to Costa Mesa.

Can Cheapflights find flights from Toronto to Costa Mesa with no change fees?

Yes! Cheapflights helps users easily find flights from Toronto to Costa Mesa with no change fees.

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