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Cheap flights from Toronto to Costa Mesa from C$ 170

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 19/9. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — LAX
23 Aug — 30 Aug1
1 adult

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

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 18 August 2025.

Round-trip from

C$ 250

One-way from

C$ 170

Popular in

December

Cheapest in

September

Average price

C$ 438
WestJet
  • WestJet
  • 2/9-30/9
  • Nonstop
  • 10h 15m total
  • Toronto to Costa Mesa
Search Deals
Porter Airlines
  • Porter Airlines
  • 19/9
  • Nonstop
  • 5h 20m total
  • Toronto to Costa Mesa
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 66 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 August 2025
Search Deals

Find flight deals from Toronto to Costa Mesa

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 18 August 2025.

Tue 2/97:45 p.m.YYZ - LAX
Nonstop5h 26mWestJet
Tue 30/911:10 p.m.LAX - YYZ
Nonstop4h 49mWestJet
Deal found 17/8C$ 250
Tue 23/97:45 p.m.YYZ - LAX
Nonstop5h 26mWestJet
Tue 30/911:10 p.m.LAX - YYZ
Nonstop4h 49mWestJet
Deal found 16/8C$ 253
Tue 30/97:45 p.m.YYZ - LAX
Nonstop5h 26mWestJet
Tue 7/1011:10 p.m.LAX - YYZ
Nonstop4h 49mWestJet
Deal found 16/8C$ 257
Sat 20/96:35 p.m.YYZ - LAX
Nonstop5h 18mAir Canada
Mon 29/99:55 p.m.LAX - YYZ
Nonstop4h 51mAir Canada
Deal found 17/8C$ 258
Tue 2/97:45 p.m.YYZ - LAX
Nonstop5h 26mWestJet
Fri 5/912:35 p.m.LAX - YYZ
1 stop9h 08mWestJet
Deal found 17/8C$ 260
Wed 27/88:00 a.m.YYZ - LAX
2 stops13h 10mWestJet
Thu 18/97:00 a.m.LAX - YYZ
2 stops11h 01mWestJet
Deal found 16/8C$ 263
Mon 6/109:00 a.m.YYZ - LAX
2 stops11h 16mWestJet
Tue 7/1011:10 p.m.LAX - YYZ
Nonstop4h 49mWestJet
Deal found 15/8C$ 264
Sun 31/87:45 p.m.YYZ - LAX
Nonstop5h 25mWestJet
Thu 4/912:35 p.m.LAX - YYZ
2 stops14h 37mWestJet
Deal found 16/8C$ 265
Sun 31/87:45 p.m.YYZ - LAX
Nonstop5h 25mWestJet
Tue 9/911:10 p.m.LAX - YYZ
Nonstop4h 49mWestJet
Deal found 17/8C$ 267
Sun 12/107:45 p.m.YYZ - LAX
Nonstop5h 26mWestJet
Fri 17/1011:10 p.m.LAX - YYZ
Nonstop4h 49mWestJet
Deal found 15/8C$ 269
Sat 20/93:25 p.m.YTZ - LAX
1 stop9h 10mAir Canada
Sun 21/910:30 p.m.LAX - YTZ
1 stop10h 15mAir Canada
Deal found 16/8C$ 289
Tue 23/93:25 p.m.YTZ - LAX
1 stop9h 10mAir Canada
Tue 30/910:30 p.m.LAX - YTZ
1 stop10h 15mAir Canada
Deal found 17/8C$ 292

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 18 August 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

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Sat 4/10

6:35 p.m.-8:53 p.m.

Nonstop5h 18m

Los Angeles

Sat 11/10

9:55 p.m.-5:46 a.m.

Nonstop4h 51m

C$ 271

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Tue 21/10

7:45 p.m.-10:11 p.m.

Nonstop5h 26m

Los Angeles

Fri 24/10

7:00 a.m.-6:52 p.m.

1 stop8h 52m

C$ 275

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Tue 23/9

7:45 p.m.-10:11 p.m.

Nonstop5h 26m

Los Angeles

Fri 26/9

7:00 a.m.-6:52 p.m.

1 stop8h 52m

C$ 276

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Thu 25/9

12:00 p.m.-9:46 p.m.

2 stops12h 46m

Los Angeles

Tue 30/9

11:10 p.m.-6:59 a.m.

Nonstop4h 49m

C$ 276

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Fri 24/10

7:45 p.m.-10:11 p.m.

Nonstop5h 26m

Los Angeles

Tue 28/10

12:20 p.m.-12:31 a.m.

1 stop9h 11m

C$ 276

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Thu 23/10

12:00 p.m.-8:21 p.m.

1 stop11h 21m

Los Angeles

Sun 26/10

11:50 a.m.-12:38 a.m.

1 stop9h 48m

C$ 285

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Fri 17/10

2:00 p.m.-8:21 p.m.

1 stop9h 21m

Los Angeles

Sun 19/10

7:00 a.m.-8:52 p.m.

1 stop10h 52m

C$ 285

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Fri 10/10

2:00 p.m.-8:21 p.m.

1 stop9h 21m

Los Angeles

Mon 13/10

11:25 a.m.-12:31 a.m.

1 stop10h 06m

C$ 285

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Thu 16/10

6:35 p.m.-8:53 p.m.

Nonstop5h 18m

Los Angeles

Sun 19/10

10:30 p.m.-10:39 a.m.

1 stop9h 09m

C$ 286

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Tue 23/9

6:35 p.m.-8:53 p.m.

Nonstop5h 18m

Los Angeles

Sat 27/9

10:30 p.m.-10:39 a.m.

1 stop9h 09m

C$ 286

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/8

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 8 August 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, May is the cheapest month in which you can book a flight from Toronto to Costa Mesa (average of C$ 232). Flying from Toronto to Costa Mesa in March is currently the most expensive (average of C$ 298). 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 18 August 2025.

When flying from Toronto 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 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 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 18 August 2025.

The most flights from YTO to CM3 are scheduled on a Sunday (25 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (14 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 18 August 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
334 reviews
Check prices

Food

7.6

Comfort

8.0

Crew

8.7

Entertainment

7.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Porter Airlines
8.0
Very good
334 reviews
Porter Airlines
8.0
Very good
334 reviews
Check prices

Food

7.6

Comfort

8.0

Crew

8.7

Entertainment

7.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Air Transat
7.7
Good
429 reviews
Porter Airlines
8.0
Very good
334 reviews
Check prices

Food

7.6

Comfort

8.0

Crew

8.7

Entertainment

7.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
United Airlines
7.4
Good
8,925 reviews
Porter Airlines
8.0
Very good
334 reviews
Check prices

Food

7.6

Comfort

8.0

Crew

8.7

Entertainment

7.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
WestJet
7.2
Good
3,023 reviews
Porter Airlines
8.0
Very good
334 reviews
Check prices

Food

7.6

Comfort

8.0

Crew

8.7

Entertainment

7.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Air Canada
7.1
Good
9,992 reviews
Porter Airlines
8.0
Very good
334 reviews
Check prices

Food

7.6

Comfort

8.0

Crew

8.7

Entertainment

7.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience

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 5h 18m. Fly via Air Canada or WestJet to get the fastest option. The distance from Toronto to Costa Mesa is about 3492 km. Generally, flights for this route are direct.

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

    While some choose either Toronto Island - Los Angeles or Hamilton - 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 (82%), Air Transat (82%) or Brussels Airlines (57%) 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$ 931 for a flight from Toronto to Costa Mesa. The cheapest flight overall is C$ 150 while the most popular route, (Toronto Pearson Intl - Los Angeles) is currently priced at C$ 240.

  • 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, May is the cheapest month in which you can book a flight from Toronto to Costa Mesa (average of C$ 232). Flying from Toronto to Costa Mesa in March is currently the most expensive (average of C$ 298). 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 7 airlines flying from Toronto to Costa Mesa

Discover the top 7 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 18 August 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 132AverageC$ 544FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 199AverageC$ 460FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 241AverageC$ 462FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Porter AirlinesCheapestC$ 261AverageC$ 390FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 284AverageC$ 507FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air TransatCheapestC$ 298AverageC$ 514FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air CanadaCheapestC$ 302AverageC$ 505FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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