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C$ 158+ Cheap flights to Costa Mesa

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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
— LAX
11 Oct — 18 Oct1
1 adult
1 adult, Economy

Flights to Costa Mesa in 2025

Find the latest flights to Costa Mesa in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 629,999 searches and data was last updated on 11 September 2025.

Round-trip from

C$ 233

One-way from

C$ 158

Popular in

December

Cheapest in

September

Average price

C$ 327
WestJet
  • WestJet
  • 22/9-25/9
  • 3 total stops
  • 20h 47m total
  • Toronto to Los Angeles
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WestJet
  • WestJet
  • 5/11
  • 2 total stops
  • 19h 50m total
  • Toronto to Costa Mesa
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 61 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 24 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals to Costa Mesa

Cheapest flights to Costa Mesa
Explore the most affordable flight options available to Costa Mesa. Find the lowest fares based on data from user searches, with prices last updated on 11 September 2025.

Mon 22/93:00 p.m.YYZ - LAX
1 stop9h 46mWestJet
Thu 25/97:00 a.m.LAX - YYZ
2 stops11h 01mWestJet
Deal found 10/9C$ 233
Fri 26/97:45 p.m.YYZ - LAX
Nonstop5h 26mWestJet
Thu 2/107:00 a.m.LAX - YYZ
2 stops11h 01mWestJet
Deal found 11/9C$ 234
Mon 6/109:00 a.m.YYZ - LAX
2 stops15h 46mWestJet
Sun 19/107:00 a.m.LAX - YYZ
2 stops14h 31mWestJet
Deal found 11/9C$ 236
Thu 27/119:40 a.m.YYZ - LAX
2 stops11h 52mWestJet
Tue 2/1211:50 a.m.LAX - YYZ
2 stops15h 23mWestJet
Deal found 11/9C$ 237
Fri 17/102:00 p.m.YYZ - LAX
1 stop9h 21mWestJet
Sun 19/107:00 a.m.LAX - YYZ
2 stops14h 31mWestJet
Deal found 11/9C$ 238
Fri 17/106:00 a.m.YKF - LAX
2 stops15h 54mWestJet
Sun 19/1011:40 a.m.LAX - YKF
1 stop10h 05mWestJet
Deal found 9/9C$ 238
Tue 30/97:45 p.m.YYZ - LAX
Nonstop5h 26mWestJet
Sun 5/1011:10 p.m.LAX - YYZ
Nonstop4h 49mWestJet
Deal found 10/9C$ 240
Tue 4/116:20 a.m.YKF - LAX
2 stops15h 12mWestJet
Sun 9/115:45 p.m.LAX - YKF
1 stop8h 43mWestJet
Deal found 9/9C$ 240
Sun 12/106:00 a.m.YHM - LAX
1 stop18h 46mWestJet
Wed 15/1011:40 a.m.LAX - YHM
1 stop10h 00mWestJet
Deal found 9/9C$ 240
Fri 3/107:45 p.m.YYZ - LAX
Nonstop5h 26mWestJet
Thu 9/107:00 a.m.LAX - YYZ
2 stops14h 31mWestJet
Deal found 10/9C$ 241
Fri 24/106:00 a.m.YKF - LAX
1 stop14h 16mWestJet
Mon 27/1011:50 a.m.LAX - YKF
2 stops14h 38mWestJet
Deal found 9/9C$ 241
Wed 15/106:00 a.m.YHM - LAX
1 stop18h 46mWestJet
Sun 19/1011:40 a.m.LAX - YHM
1 stop10h 00mWestJet
Deal found 9/9C$ 241

Cheapflights Fare Finder

 
Locate flights to Costa Mesa that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 629,999 searches and data was last updated on 11 September 2025.
Use the filters below to find and compare flights to Costa Mesa that are best for you.

Fly from

Toronto

Route

Depart

Return

Price

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Thu 23/10

6:00 a.m.-9:46 p.m.

1 stop18h 46m

Los Angeles

Wed 29/10

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

2 stops14h 38m

C$ 238

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Tue 18/11

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

1 stop18h 43m

Los Angeles

Wed 10/12

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

2 stops14h 38m

C$ 241

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Tue 4/11

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

1 stop18h 43m

Los Angeles

Wed 12/11

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

2 stops14h 38m

C$ 241

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Fri 17/10

6:00 a.m.-6:54 p.m.

2 stops15h 54m

Los Angeles

Mon 3/11

5:45 p.m.-5:28 a.m.

1 stop8h 43m

C$ 243

HamiltonLos Angeles

YHM - LAX

YHMLAX

Hamilton

Sat 11/10

6:00 a.m.-9:46 p.m.

1 stop18h 46m

Los Angeles

Wed 15/10

11:40 a.m.-12:40 a.m.

1 stop10h 00m

C$ 244

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Tue 11/11

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

2 stops31h 40m

Los Angeles

Sun 23/11

5:45 p.m.-5:28 a.m.

1 stop8h 43m

C$ 245

HamiltonLos Angeles

YHM - LAX

YHMLAX

Hamilton

Tue 7/10

6:00 a.m.-5:16 p.m.

1 stop14h 16m

Los Angeles

Sat 11/10

11:40 a.m.-12:40 a.m.

1 stop10h 00m

C$ 245

HamiltonLos Angeles

YHM - LAX

YHMLAX

Hamilton

Mon 6/10

6:00 a.m.-5:16 p.m.

1 stop14h 16m

Los Angeles

Sat 11/10

11:40 a.m.-12:40 a.m.

1 stop10h 00m

C$ 247

TorontoLos Angeles

YKF - LAX

YKFLAX

Toronto Region of Waterloo Intl

Tue 30/9

6:00 a.m.-9:46 p.m.

1 stop18h 46m

Los Angeles

Sun 5/10

7:00 a.m.-12:45 a.m.

1 stop14h 45m

C$ 254

HamiltonLos Angeles

YHM - LAX

YHMLAX

Hamilton

Thu 16/10

6:00 a.m.-5:16 p.m.

1 stop14h 16m

Los Angeles

Sun 19/10

11:40 a.m.-12:40 a.m.

1 stop10h 00m

C$ 254

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

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

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

When is the best time to book a flight 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 29 August 2025.

The price you pay for your flight to Costa Mesa may vary depending on when you book. For the best chance of a lower fare, look to book 88 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

How long is the flight to Costa Mesa?

On average, a flight from Toronto to Costa Mesa takes 10 hours 3 minutes. Flights to Costa Mesa from other popular cities in Canada will vary in length. Below are a few examples of popular routes and their flight times.

When is the cheapest time to fly 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.

Users looking for the lowest fares to Costa Mesa should consider flying on Thursday afternoons, when prices are typically cheapest. Budget-minded travellers will want to avoid Thursday at noon, when prices are usually at their highest.

Weekly flight availability to Costa Mesa

The most flights from Toronto to Costa Mesa are scheduled on a Tuesday (22 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (14 on average).

What are the most popular airlines that fly to Costa Mesa?

The most popular airlines flying from Toronto to Costa Mesa are Porter Airlines, Air Canada and WestJet.

WestJet
WestJet
From C$ 121
Air Canada
Air Canada
From C$ 110
Porter Airlines
Porter Airlines
From C$ 189
United Airlines
United Airlines
From C$ 129

What are the cheapest airlines that fly to Costa Mesa?

The cheapest airlines flying from Toronto to Costa Mesa are American Airlines, WestJet and Delta.

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 11 September 2025.
Get a feel of what it's like to fly with Porter Airlines,Air Transat, andUnited Airlines to the United States by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

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
7.9
Good
363 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

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
7.7
Good
438 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

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
8,937 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

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
3,091 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

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
10,000 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

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.

FAQs about flying to Costa Mesa

  • Can I find cheaper flights to Costa Mesa if I am willing to have layovers?

    Yes, flights with layovers are often cheaper than direct flights. Keep an eye out for flight deals to Costa Mesa on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Costa Mesa?

    Based on reviews from Cheapflights users, Flair Airlines is rated the highest out of the airlines that fly to Costa Mesa.

  • How much is a round-trip flight to Costa Mesa?

    A round-trip flight to Costa Mesa will typically cost around C$ 105, however they can be found for as little as C$ 57.

  • Where does the fastest flight to Costa Mesa depart from?

    For those looking to save time traveling to Costa Mesa, Vancouver offers the quickest one-way flight (2 hours 55 minutes).

  • Does Los Angeles have rental cars?

    Yes. Those touching down at Los Angeles can take advantage of the rental car services offered upon their arrival.

  • Are there hotels close to Los Angeles?

    Yes. Los Angeles has hotels nearby for those requiring accommodations. 2br Furn Home - Safe/Quiet/Clean So Bay Nr Bch/Lax is the closest property to Los Angeles (0.0 km away from Los Angeles).

See more FAQs

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