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Costa Mesa

$84+ Cheap flights from Seattle (SEA) to Costa Mesa, CA

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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Costa Mesa are usually found in January or March, booked 30 days in advance, depart on a Thursday or Friday and return on a Friday

Cheap flight deals from Seattle to Costa Mesa

Keep the following information in mind while searching for Seattle to Costa Mesa flight deals. Data was last updated September 15, 2025.

Round-trip from

$127
(Kiwi.com)

One-way from

$84
(Frontier)

Popular in

December

Cheapest in

January

Average price

$222
From Seattle/Tacoma Intl to Costa Mesa
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One-way flight from Seattle/Tacoma Intl to Costa Mesa
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($5 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 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 from Seattle to Costa Mesa

Cheapest flights from Seattle to Costa Mesa
Explore the most affordable flight options available from Seattle to Costa Mesa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Frontier deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/279:39 pmSEA - LAX
Nonstop2h 50mFrontier
Sat 10/49:08 pmLAX - SEA
Nonstop2h 51mFrontier
Deal found 9/15$126
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/291:47 pmSEA - LAX
1 stop6h 05mFrontier
Sat 10/114:52 pmLAX - SEA
Nonstop2h 56mFrontier
Deal found 9/15$127
This CheapOair deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/49:39 pmSEA - LAX
Nonstop2h 50mFrontier
Tue 10/76:45 amLAX - SEA
1 stop29h 22mFrontier
Deal found 9/14$128
This Priceline deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/210:10 amSEA - LAX
Nonstop2h 50mFrontier
Sat 10/49:08 pmLAX - SEA
Nonstop2h 51mFrontier
Deal found 9/13$129
This Flightnetwork deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/49:39 pmSEA - LAX
Nonstop2h 50mFrontier
Mon 10/64:45 pmLAX - SEA
Nonstop2h 51mFrontier
Deal found 9/13$130
This Frontier deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/47:00 amSEA - LAX
1 stop10h 30mFrontier
Sat 10/49:08 pmLAX - SEA
Nonstop2h 51mFrontier
Deal found 9/14$131
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:12 amSEA - LAX
1 stop11h 06mFrontier
Wed 10/84:52 pmLAX - SEA
Nonstop2h 56mFrontier
Deal found 9/14$132
This Frontier deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/29:03 amSEA - LAX
Nonstop2h 49mFrontier
Fri 11/147:48 pmLAX - SEA
1 stop12h 30mFrontier
Deal found 9/14$133
This Frontier deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/210:10 amSEA - LAX
Nonstop2h 50mFrontier
Fri 10/104:52 pmLAX - SEA
Nonstop2h 56mFrontier
Deal found 9/14$134
This Frontier deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/49:39 pmSEA - LAX
Nonstop2h 50mFrontier
Thu 10/97:00 pmLAX - SEA
1 stop13h 48mFrontier
Deal found 9/14$135
This Cheapflightsfares deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/510:10 amSEA - LAX
Nonstop2h 50mFrontier
Fri 10/104:52 pmLAX - SEA
Nonstop2h 56mFrontier
Deal found 9/13$138

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle 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 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from Seattle to Costa Mesa that are best for you.

Fly from

Seattle

Fly to

Costa Mesa

Route

Depart

Return

Price

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Tue 10/7

7:00 am-12:44 pm

1 stop5h 44m

Los Angeles

Tue 10/7

3:52 pm-6:42 pm

Nonstop2h 50m

$161

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 10/29

9:04 am-12:03 pm

Nonstop2h 59m

Los Angeles

Wed 11/5

2:33 pm-9:13 pm

1 stop6h 40m

$194

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 10/4

8:00 am-10:58 am

Nonstop2h 58m

Los Angeles

Tue 10/7

3:52 pm-6:42 pm

Nonstop2h 50m

$197

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 11/15

7:57 pm-10:46 pm

Nonstop2h 49m

Los Angeles

Wed 11/19

8:00 am-11:06 am

Nonstop3h 06m

$197

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 10/8

2:40 pm-5:32 pm

Nonstop2h 52m

Los Angeles

Tue 10/14

7:59 pm-11:01 pm

Nonstop3h 02m

$197

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 10/29

11:15 am-4:50 pm

1 stop5h 35m

Los Angeles

Wed 11/5

7:40 am-4:30 pm

2 stops8h 50m

$204

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 11/22

5:15 pm-12:20 am

1 stop7h 05m

Los Angeles

Thu 11/27

12:50 pm-5:00 pm

1 stop4h 10m

$206

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sun 11/2

5:50 am-10:00 am

1 stop4h 10m

Los Angeles

Wed 11/5

7:40 am-4:30 pm

2 stops8h 50m

$213

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sun 10/12

6:15 am-10:20 am

1 stop4h 05m

Los Angeles

Wed 10/15

3:40 pm-10:00 pm

2 stops6h 20m

$213

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Tue 10/7

7:00 am-2:38 pm

1 stop7h 38m

Los Angeles

Wed 10/8

8:37 am-1:38 pm

1 stop5h 01m

$216

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 24 results
1
2
3

Best time to book a flight from Seattle to Costa Mesa

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

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Costa Mesa. Price data was last updated on September 12, 2025.

The price you pay for your flight from Seattle to Costa Mesa may vary depending on when you book. For the best chance of a lower fare, look to book 30 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Costa Mesa?

Currently, January is the cheapest month in which you can book a flight from Seattle to Costa Mesa (average of $246). Flying from Seattle to Costa Mesa in March is currently the most expensive (average of $325). 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 SEA to CM3?

Find hourly flight availability from Seattle 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 September 15, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Costa Mesa as you normally would.

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

Use this chart to determine the cheapest time to fly round-trip from Seattle to Costa Mesa. Price data was last updated on September 14, 2025.

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

Weekly flight availability from Seattle to Costa Mesa

Explore weekly flight availability from Seattle 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 September 15, 2025.

The most flights from SEA to CM3 are scheduled on a Monday (132 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (92 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 September 15, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta, and United Airlines from Seattle 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.0

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.0

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,954 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.0

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,929 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.0

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Spirit Airlines
6.3
Okay
8,015 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.0

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Frontier
5.8
Fair
3,172 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.0

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Costa Mesa. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Costa Mesa?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Costa Mesa. You should not have trouble finding flights to Costa Mesa from Seattle/Tacoma Intl; the airport handles an average of 109 outbound flights to Costa Mesa per day. You should also have plenty of airline options to choose from since 8 airlines have flights from the Seattle airport to Costa Mesa. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.

  • How popular is this Seattle to Costa Mesa flight route?

    The Seattle/Tacoma Intl to Costa Mesa flight path was viewed by 307 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Seattle to Costa Mesa?

    Airlines like Alaska Airlines and United Airlines fly from Seattle to Costa Mesa in about 2h 59m. The time it takes to get you to your destination can typically vary by up to 2h 45m. Seattle and Costa Mesa are separated by a distance of 954 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $95. Users have also found prices from $99 and $108 on United Airlines and Alaska Airlines, respectively.

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

    No one likes to see their flight delayed. When booking a flight from Seattle to Costa Mesa consider choosing China Eastern (97%), SAUDIA (92%) or EL AL (91%) as they are the most reliable in getting you off to your destination on time.

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

    Looking for the cheapest flight from Seattle to Costa Mesa? While on average our users pay $545, our data indicates the cheapest price to be $87. The most popular route (Seattle/Tacoma Intl - Los Angeles), is priced around $84.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Seattle to Costa Mesa (average of $246). Flying from Seattle to Costa Mesa in March is currently the most expensive (average of $325). 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 Seattle to Costa Mesa

Discover the top 8 airlines that operate flights from Seattle 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 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$46Average$156FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$70Average$167FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$98Average$263FlexibilityNo cancel feeOn-time85%
DeltaCheapest$117Average$255FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$146Average$274FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$146Average$267FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$156Average$270FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$167Average$303FlexibilityNo cancel feeOn-time71%

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