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Costa Mesa

$74+ 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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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 63 days in advance, depart on a Friday or Thursday and return on a Friday

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 October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/28. 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 11/203:22 pmSEA - LAX
Nonstop2h 45mFrontier
Thu 11/272:58 pmLAX - SEA
1 stop20h 58mFrontier
Deal found 10/28$128
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 12/41:09 pmSEA - LAX
1 stop18h 33mFrontier
Wed 12/103:30 pmLAX - SEA
1 stop18h 36mFrontier
Deal found 10/29$129
This Priceline deal was found by Cheapflights users on 10/28. 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.
Fri 12/53:40 pmSEA - LAX
1 stop8h 49mFrontier
Sun 12/710:24 amLAX - SEA
Nonstop3h 06mFrontier
Deal found 10/28$130
This CheapOair deal was found by Cheapflights users on 10/30. 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 12/1312:48 pmSEA - LAX
1 stop18h 54mFrontier
Mon 12/1510:24 amLAX - SEA
Nonstop3h 06mFrontier
Deal found 10/30$131
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Sat 11/1512:58 pmSEA - LAX
1 stop11h 27mMultiple Airlines
Fri 11/219:54 pmLAX - SEA
1 stop15h 28mMultiple Airlines
Deal found 10/30$132
This Priceline deal was found by Cheapflights users on 10/29. 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.
Fri 12/52:25 pmSEA - LAX
Nonstop2h 45mFrontier
Mon 12/810:24 amLAX - SEA
Nonstop3h 06mFrontier
Deal found 10/29$133
This Frontier deal was found by Cheapflights users on 10/28. 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 12/286:00 amSEA - LAX
Nonstop2h 46mFrontier
Thu 1/19:36 pmLAX - SEA
Nonstop3h 06mFrontier
Deal found 10/28$134
This Frontier deal was found by Cheapflights users on 10/30. 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 11/203:22 pmSEA - LAX
Nonstop2h 45mFrontier
Fri 11/2111:40 amLAX - SEA
Nonstop2h 57mFrontier
Deal found 10/30$135
This Priceline deal was found by Cheapflights users on 10/30. 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.
Sat 11/223:22 pmSEA - LAX
Nonstop2h 45mFrontier
Mon 11/2411:40 amLAX - SEA
Nonstop2h 57mFrontier
Deal found 10/30$136
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Fri 12/261:25 pmSEA - LAX
2 stops31h 06mFrontier
Thu 1/19:36 pmLAX - SEA
Nonstop3h 06mFrontier
Deal found 10/28$137
This Frontier deal was found by Cheapflights users on 10/28. 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.
Fri 11/142:22 pmSEA - LAX
1 stop10h 03mFrontier
Fri 11/2111:40 amLAX - SEA
Nonstop2h 57mFrontier
Deal found 10/28$139

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 October 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$128
(Kiwi.com)

One-way from

$74
(CheapOair)

Popular in

December

Cheapest in

January

Average price

$238
Provider with most accurate pricing for Seattle/Tacoma Intl-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Los Angeles flights.
Search Deals
From Seattle/Tacoma Intl to Costa Mesa
Search Deals
One-way flight from Seattle/Tacoma Intl to Costa Mesa
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 30, 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 1/20

12:24 pm-3:23 pm

Nonstop2h 59m

Los Angeles

Tue 1/27

4:15 pm-9:12 pm

1 stop4h 57m

$154

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Thu 1/22

5:53 pm-8:37 pm

Nonstop2h 44m

Los Angeles

Tue 1/27

2:56 pm-5:52 pm

Nonstop2h 56m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Tue 12/2

5:59 pm-8:43 pm

Nonstop2h 44m

Los Angeles

Fri 12/12

7:55 pm-10:54 pm

Nonstop2h 59m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sun 11/23

12:40 pm-3:25 pm

Nonstop2h 45m

Los Angeles

Tue 12/2

5:54 pm-8:50 pm

Nonstop2h 56m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Fri 12/5

8:10 pm-10:58 pm

Nonstop2h 48m

Los Angeles

Tue 12/9

11:25 am-2:24 pm

Nonstop2h 59m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 12/10

2:05 pm-4:48 pm

Nonstop2h 43m

Los Angeles

Mon 12/15

7:40 am-10:45 am

Nonstop3h 05m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Thu 11/27

6:01 pm-8:53 pm

Nonstop2h 52m

Los Angeles

Tue 12/2

5:54 pm-8:50 pm

Nonstop2h 56m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 12/10

8:10 am-12:20 pm

1 stop4h 10m

Los Angeles

Tue 12/16

7:25 am-11:35 am

1 stop4h 10m

$168

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 1/21

11:20 am-3:15 pm

1 stop3h 55m

Los Angeles

Thu 1/22

2:30 pm-6:35 pm

1 stop4h 05m

$169

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Fri 12/5

12:10 pm-4:30 pm

1 stop4h 20m

Los Angeles

Tue 12/9

7:25 am-11:35 am

1 stop4h 10m

$178

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 22 results
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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 October 24, 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 63 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 $38). Flying from Seattle to Costa Mesa in July is currently the most expensive (average of $119). 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 October 30, 2025.

When flying from Seattle to Costa Mesa, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 11% versus a flight in the afternoon.

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 October 26, 2025.

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

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 October 30, 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
11,217 reviews

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,217 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
7.9
Good
7,998 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
8,998 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Spirit Airlines
6.3
Okay
8,116 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Frontier
5.8
Fair
3,123 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

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 43 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 309 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 United Airlines, Alaska Airlines, and Delta fly from Seattle to Costa Mesa in about 2h 44m. The time it takes to get you to your destination is usually consistent. Seattle and Costa Mesa are separated by a distance of 954 mi. Most flights are nonstop.

  • 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 $75. Users have also found prices from $78 and $88 on Frontier 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 ITA Airways (98%), Air China (97%) or China Eastern (97%) 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 $792, our data indicates the cheapest price to be $64. The most popular route (Seattle/Tacoma Intl - Los Angeles), is priced around $106.

  • 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 $38). Flying from Seattle to Costa Mesa in July is currently the most expensive (average of $119). 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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Alternative routes for Seattle to Costa Mesa

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$48Average$159FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$76Average$169FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$98Average$262FlexibilityNo cancel feeOn-time85%
DeltaCheapest$118Average$256FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$130Average$263FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$146Average$279FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$156Average$270FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$177Average$400FlexibilityNo cancel feeOn-time71%

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