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Cheap flights from Toronto to Costa Mesa from C$ 259

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — LAX
13 Jun — 20 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Toronto to Costa Mesa are usually found in September or October, booked 88 days in advance, depart on a Thursday or Friday and return on a Saturday

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 14 May 2026.

Fri 19/610:00 a.m.
YYZ
-
LAX
1 stop10h 10m
WestJet
Thu 25/67:30 a.m.
LAX
-
YYZ
2 stops13h 29m
WestJet
Deal found 11/5C$ 423
Wed 15/712:40 p.m.
YYZ
-
LAX
2 stops12h 25m
WestJet
Tue 21/77:30 a.m.
LAX
-
YYZ
2 stops13h 29m
WestJet
Deal found 11/5C$ 441
Wed 17/610:00 a.m.
YYZ
-
LAX
2 stops15h 05m
WestJet
Wed 24/67:30 a.m.
LAX
-
YYZ
2 stops13h 29m
WestJet
Deal found 11/5C$ 448
Tue 15/96:00 a.m.
YYZ
-
LAX
1 stop9h 25m
WestJet
Sat 19/93:00 p.m.
LAX
-
YYZ
2 stops11h 10m
WestJet
Deal found 11/5C$ 452
Thu 18/610:00 a.m.
YYZ
-
LAX
1 stop10h 10m
WestJet
Mon 22/612:10 p.m.
LAX
-
YYZ
1 stop9h 55m
WestJet
Deal found 11/5C$ 455
Mon 15/68:40 p.m.
YKF
-
LAX
2 stops17h 40m
WestJet
Mon 22/67:30 a.m.
LAX
-
YKF
1 stop9h 20m
WestJet
Deal found 11/5C$ 458
Sun 21/68:40 p.m.
YKF
-
LAX
1 stop18h 45m
WestJet
Wed 24/67:30 a.m.
LAX
-
YKF
1 stop9h 20m
WestJet
Deal found 11/5C$ 463
Thu 18/68:40 p.m.
YKF
-
LAX
2 stops22h 20m
WestJet
Mon 22/67:30 a.m.
LAX
-
YKF
1 stop9h 20m
WestJet
Deal found 11/5C$ 467
Wed 9/98:40 p.m.
YKF
-
LAX
1 stop23h 30m
WestJet
Wed 16/97:30 a.m.
LAX
-
YKF
1 stop9h 20m
WestJet
Deal found 11/5C$ 471
Thu 2/78:40 p.m.
YKF
-
LAX
1 stop23h 30m
WestJet
Wed 8/77:30 a.m.
LAX
-
YKF
1 stop9h 20m
WestJet
Deal found 11/5C$ 479
Tue 16/68:40 p.m.
YKF
-
LAX
1 stop20h 25m
WestJet
Tue 23/67:30 a.m.
LAX
-
YKF
1 stop9h 20m
WestJet
Deal found 13/5C$ 481
Thu 12/116:20 a.m.
YKF
-
LAX
2 stops15h 30m
WestJet
Fri 20/1111:50 a.m.
LAX
-
YKF
2 stops14h 38m
WestJet
Deal found 10/5C$ 484

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 14 May 2026.

Round-trip from

C$ 423

One-way from

C$ 259

Popular in

May

Cheapest in

September

Average price

C$ 549
WestJet
  • WestJet
  • 19/6-25/6
  • 3 total stops
  • 23h 39m total
  • Toronto to Costa Mesa
Search Deals
16/9
  • 16/9
  • 2 total stops
  • 11h 52m total
  • Toronto to Costa Mesa
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 83 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 14 May 2026.
Use the filters below to find and compare flights from Toronto to Costa Mesa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Mon 12/10

8:40 p.m.-10:05 p.m.

1 stop28h 25m

Los Angeles Los Angeles

Mon 19/10

7:30 a.m.-7:50 p.m.

1 stop9h 20m

C$ 492

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Thu 18/6

8:40 p.m.-2:05 p.m.

1 stop20h 25m

Los Angeles Los Angeles

Tue 23/6

7:30 a.m.-7:50 p.m.

1 stop9h 20m

C$ 496

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Wed 22/7

8:40 p.m.-11:20 a.m.

2 stops17h 40m

Los Angeles Los Angeles

Sun 26/7

7:30 a.m.-7:50 p.m.

1 stop9h 20m

C$ 499

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Thu 18/6

8:40 p.m.-5:10 p.m.

1 stop23h 30m

Los Angeles Los Angeles

Mon 22/6

7:30 a.m.-7:50 p.m.

1 stop9h 20m

C$ 515

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Sun 9/8

8:40 p.m.-5:10 p.m.

1 stop23h 30m

Los Angeles Los Angeles

Sun 23/8

7:30 a.m.-7:50 p.m.

1 stop9h 20m

C$ 518

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Thu 28/5

11:00 a.m.-10:37 p.m.

2 stops14h 37m

Los Angeles Los Angeles

Mon 1/6

10:35 p.m.-11:49 a.m.

1 stop10h 14m

C$ 521

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Fri 5/6

11:00 a.m.-9:29 p.m.

2 stops13h 29m

Los Angeles Los Angeles

Tue 9/6

8:22 p.m.-7:00 a.m.

1 stop7h 38m

C$ 521

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Fri 28/8

8:40 p.m.-4:00 p.m.

2 stops22h 20m

Los Angeles Los Angeles

Mon 31/8

7:30 a.m.-7:50 p.m.

1 stop9h 20m

C$ 522

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Fri 5/6

7:45 a.m.-5:21 p.m.

1 stop12h 36m

Los Angeles Los Angeles

Fri 12/6

8:10 a.m.-11:58 p.m.

1 stop12h 48m

C$ 547

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Thu 11/6

9:00 p.m.-8:27 a.m.

1 stop14h 27m

Los Angeles Los Angeles

Tue 7/7

11:30 p.m.-10:04 a.m.

1 stop7h 34m

C$ 555

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/5

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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

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 14 May 2026.

It’s optimal to fly from Toronto to Costa Mesa in the evening. By choosing this option you can save up to 61% on the cost of your flight, compared to a flight at noon.

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 9 May 2026.

Travelers seeking maximum savings on their Toronto to Costa Mesa flight should consider departing on Friday evenings 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.

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 14 May 2026.

The most flights from YTO to CM3 are scheduled on a Wednesday (19 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 on average).

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 14 May 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
8.0
Very good
437 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Food

7.6

Entertainment

6.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Porter Airlines
8.0
Very good
437 reviews
Porter Airlines
8.0
Very good
437 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Food

7.6

Entertainment

6.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Transat
7.8
Good
552 reviews
Porter Airlines
8.0
Very good
437 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Food

7.6

Entertainment

6.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
United Airlines
7.4
Good
9,712 reviews
Porter Airlines
8.0
Very good
437 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Food

7.6

Entertainment

6.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
WestJet
7.2
Good
3,335 reviews
Porter Airlines
8.0
Very good
437 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Food

7.6

Entertainment

6.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Canada
7.1
Good
11,033 reviews
Porter Airlines
8.0
Very good
437 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Food

7.6

Entertainment

6.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

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 12h 36m. Fly via WestJet, United Airlines, or Delta 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$ 142 on WestJet. Other airlines that offer cheap prices include Porter Airlines from C$ 144 and Air Transat from C$ 175 one-way.

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

    While some choose either Toronto Island - Los Angeles Los Angeles or Toronto Region of Waterloo Intl - Los Angeles Los Angeles, Toronto Pearson Intl - Los Angeles 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 (79%), Porter Airlines (79%) or Air Transat (79%) 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$ 1,611 for a flight from Toronto to Costa Mesa. The cheapest flight overall is C$ 247 while the most popular route, (Toronto Pearson Intl - Los Angeles Los Angeles) is currently priced at C$ 482.

  • 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.

See more FAQs

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Alternative routes for Toronto to Costa Mesa

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 14 May 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 131AverageC$ 577FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 192AverageC$ 421FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 194AverageC$ 605FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 227AverageC$ 456FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Porter AirlinesCheapestC$ 251AverageC$ 376FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 294AverageC$ 694FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air TransatCheapestC$ 309AverageC$ 582FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
APG AirlinesCheapestC$ 605AverageC$ 606FlexibilityNo 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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