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Cheap flights from Toronto to Costa Mesa from C$ 199

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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — LAX
7 Mar — 14 Mar1
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

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 5 February 2026.

Mon 9/310:00 a.m.
YYZ
-
LAX
1 stop9h 58m
WestJet
Thu 12/37:00 a.m.
LAX
-
YYZ
2 stops13h 35m
WestJet
Deal found 4/2C$ 309
Tue 10/31:30 p.m.
YYZ
-
LAX
1 stop11h 33m
WestJet
Thu 12/37:00 a.m.
LAX
-
YYZ
2 stops13h 35m
WestJet
Deal found 3/2C$ 310
Wed 11/39:40 a.m.
YYZ
-
LAX
2 stops11h 50m
WestJet
Tue 17/37:00 a.m.
LAX
-
YYZ
1 stop9h 36m
WestJet
Deal found 4/2C$ 311
Wed 8/41:30 p.m.
YYZ
-
LAX
1 stop11h 33m
WestJet
Tue 14/412:15 p.m.
LAX
-
YYZ
1 stop9h 11m
WestJet
Deal found 4/2C$ 314
Wed 25/210:00 a.m.
YYZ
-
LAX
Nonstop5h 36m
Multiple Airlines
Wed 11/36:30 p.m.
LAX
-
YYZ
3 stops32h 28m
Multiple Airlines
Deal found 1/2C$ 318
Thu 16/49:40 a.m.
YYZ
-
LAX
2 stops11h 50m
WestJet
Tue 21/47:00 a.m.
LAX
-
YYZ
1 stop9h 36m
WestJet
Deal found 3/2C$ 322
Thu 5/39:40 a.m.
YYZ
-
LAX
2 stops11h 50m
WestJet
Wed 11/37:00 a.m.
LAX
-
YYZ
1 stop9h 36m
WestJet
Deal found 3/2C$ 324
Mon 9/38:00 a.m.
YYZ
-
LAX
2 stops11h 58m
WestJet
Fri 13/37:00 a.m.
LAX
-
YYZ
2 stops13h 35m
WestJet
Deal found 3/2C$ 326
Wed 4/39:40 a.m.
YYZ
-
LAX
2 stops11h 50m
Multiple Airlines
Wed 11/31:40 p.m.
LAX
-
YYZ
Nonstop4h 45m
Multiple Airlines
Deal found 2/2C$ 328
Wed 25/210:00 a.m.
YYZ
-
LAX
Nonstop5h 36m
Multiple Airlines
Mon 9/39:23 p.m.
LAX
-
YYZ
2 stops19h 13m
Multiple Airlines
Deal found 2/2C$ 329
Tue 7/46:20 a.m.
YKF
-
LAX
2 stops31h 40m
WestJet
Wed 15/411:50 a.m.
LAX
-
YKF
2 stops14h 39m
WestJet
Deal found 4/2C$ 377
Sat 7/34:25 p.m.
YTZ
-
LAX
1 stop8h 35m
Air Canada
Sat 14/38:15 a.m.
LAX
-
YTZ
1 stop10h 20m
Air Canada
Deal found 1/2C$ 389

Find 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 5 February 2026.

Round-trip from

C$ 309

One-way from

C$ 199

Popular in

December

Cheapest in

May

Average price

C$ 414
WestJet
  • WestJet
  • 9/3-12/3
  • 3 total stops
  • 23h 33m total
  • Toronto to Costa Mesa
Search Deals
Air Transat
  • Air Transat
  • 10/3
  • Nonstop
  • 5h 39m total
  • Toronto to Costa Mesa
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 5 February 2026.
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

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Tue 10/3

7:45 a.m.-1:24 p.m.

1 stop8h 39m

Los Angeles

Thu 2/4

10:55 p.m.-11:06 a.m.

1 stop9h 11m

C$ 373

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Tue 10/3

3:59 p.m.-10:45 p.m.

1 stop9h 46m

Los Angeles

Wed 1/4

6:00 a.m.-5:00 p.m.

1 stop8h 00m

C$ 373

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Tue 7/4

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

2 stops31h 40m

Los Angeles

Wed 15/4

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

2 stops14h 39m

C$ 377

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Mon 23/3

10:05 a.m.-2:35 p.m.

1 stop7h 30m

Los Angeles

Tue 24/3

9:40 p.m.-11:23 a.m.

1 stop10h 43m

C$ 381

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Thu 19/3

12:25 p.m.-6:41 p.m.

1 stop9h 16m

Los Angeles

Tue 24/3

9:55 p.m.-11:06 a.m.

1 stop10h 11m

C$ 381

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Thu 9/4

6:08 p.m.-11:52 p.m.

1 stop8h 44m

Los Angeles

Mon 13/4

11:59 p.m.-11:31 a.m.

1 stop8h 32m

C$ 381

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Thu 16/4

6:27 p.m.-12:55 a.m.

1 stop9h 28m

Los Angeles

Sun 19/4

11:40 p.m.-1:24 p.m.

1 stop10h 44m

C$ 381

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Mon 6/4

6:08 p.m.-11:52 p.m.

1 stop8h 44m

Los Angeles

Wed 15/4

6:00 a.m.-3:20 p.m.

1 stop6h 20m

C$ 381

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Wed 8/4

6:20 a.m.-10:33 a.m.

1 stop7h 13m

Los Angeles

Sat 18/4

6:00 a.m.-5:21 p.m.

1 stop8h 21m

C$ 381

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Fri 20/3

6:14 p.m.-12:56 a.m.

1 stop9h 42m

Los Angeles

Wed 25/3

11:30 p.m.-9:05 a.m.

1 stop6h 35m

C$ 381

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/2

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 30 January 2026.

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$ 109). Flying from Toronto to Costa Mesa in February is currently the most expensive (average of C$ 289). 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 5 February 2026.

It’s optimal to fly from Toronto to Costa Mesa in the evening. By choosing this option you can save up to 38% 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 31 January 2026.

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

Weekly flight availability from Toronto to Costa Mesa

Explore weekly flight availability from Toronto 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 5 February 2026.

The most flights from YTO to CM3 are scheduled on a Tuesday (19 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (6 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 5 February 2026.
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
7.9
Good
412 reviews
Check prices

Comfort

7.9

Overall

7.9

Boarding

8.2

Crew

8.6

Entertainment

6.9

Food

7.5

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
7.9
Good
412 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Comfort

7.9

Overall

7.9

Boarding

8.2

Crew

8.6

Entertainment

6.9

Food

7.5

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Transat
7.7
Good
502 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Comfort

7.9

Overall

7.9

Boarding

8.2

Crew

8.6

Entertainment

6.9

Food

7.5

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,236 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Comfort

7.9

Overall

7.9

Boarding

8.2

Crew

8.6

Entertainment

6.9

Food

7.5

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
WestJet
7.2
Good
3,255 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Comfort

7.9

Overall

7.9

Boarding

8.2

Crew

8.6

Entertainment

6.9

Food

7.5

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,688 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Comfort

7.9

Overall

7.9

Boarding

8.2

Crew

8.6

Entertainment

6.9

Food

7.5

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

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 35m. Fly via Delta, WestJet, or Air Canada to get the fastest option. The distance from Toronto to Costa Mesa is about 3510 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$ 135 on WestJet. Other airlines that offer cheap prices include Porter Airlines from C$ 141 and Air Transat from C$ 174 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 American Airlines (40%), Porter Airlines (40%) or Air Transat (40%) 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$ 1,504 for a flight from Toronto to Costa Mesa. The cheapest flight overall is C$ 213 while the most popular route, (Toronto Pearson Intl - Los Angeles) is currently priced at C$ 341.

  • 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$ 109). Flying from Toronto to Costa Mesa in February is currently the most expensive (average of C$ 289). 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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See prices for flight routes from nearby airports that may be better suited for you.
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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 5 February 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 131AverageC$ 508FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 188AverageC$ 410FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 200AverageC$ 514FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 224AverageC$ 429FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Porter AirlinesCheapestC$ 243AverageC$ 408FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air TransatCheapestC$ 276AverageC$ 489FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
United AirlinesCheapestC$ 283AverageC$ 618FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
APG AirlinesCheapestC$ 603AverageC$ 604FlexibilityNo 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.

Can Cheapflights notify me if prices for flights from Toronto to Costa Mesa become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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