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Costa Mesa

$78+ 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 3/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
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 63 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap 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 December 16, 2025.

This CheapOair deal was found by Cheapflights users on 12/12. 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.
Fri 12/191:25 pmSEA - LAX
1 stop26h 49mFrontier
Sat 1/102:00 pmLAX - SEA
Nonstop3h 04mFrontier
Deal found 12/12$136
This eDestinos deal was found by Cheapflights users on 12/13. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/191:25 pmSEA - LAX
1 stop26h 49mFrontier
Sat 12/205:44 pmLAX - SEA
1 stop20h 10mFrontier
Deal found 12/13$192
This deal was found by Cheapflights users on 12/12. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/129:14 pmSEA - LAX
Nonstop2h 45mAlaska Airlines
Wed 12/247:00 amLAX - SEA
1 stop4h 49mAlaska Airlines
Deal found 12/12$194
This Expedia deal was found by Cheapflights users on 12/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/191:25 pmSEA - LAX
1 stop26h 49mFrontier
Mon 1/59:36 pmLAX - SEA
Nonstop3h 06mFrontier
Deal found 12/12$196
This deal was found by Cheapflights users on 12/12. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/157:05 amSEA - LAX
Nonstop2h 53mAlaska Airlines
Sun 12/2111:06 amLAX - SEA
1 stop4h 41mAlaska Airlines
Deal found 12/12$210
This Expedia deal was found by Cheapflights users on 12/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/191:25 pmSEA - LAX
1 stop26h 49mFrontier
Sun 12/2110:03 pmLAX - SEA
1 stop12h 08mFrontier
Deal found 12/12$212
This Frontier deal was found by Cheapflights users on 12/15. 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.
Wed 12/316:00 amSEA - LAX
Nonstop2h 46mFrontier
Tue 1/611:31 amLAX - SEA
1 stop6h 20mFrontier
Deal found 12/15$217
This Super.com deal was found by Cheapflights users on 12/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amSEA - LAX
Nonstop2h 46mFrontier
Mon 1/59:36 pmLAX - SEA
Nonstop3h 06mFrontier
Deal found 12/14$221
This Expedia deal was found by Cheapflights users on 12/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/201:31 pmSEA - LAX
1 stop20h 42mFrontier
Mon 1/59:36 pmLAX - SEA
Nonstop3h 06mFrontier
Deal found 12/12$222
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Sun 12/211:25 pmSEA - LAX
1 stop20h 48mFrontier
Tue 1/611:31 amLAX - SEA
1 stop6h 20mFrontier
Deal found 12/15$223

Find 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 December 16, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$127
(Expedia)

One-way from

$78
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$292
Provider with most accurate pricing for Seattle/Tacoma Intl-Los Angeles flight deals.
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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
Highest demand for flights based on searches. 5% potential increase in price ($12 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 16, 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

9:00 am-11:59 am

Nonstop2h 59m

Los Angeles

Tue 1/20

4:45 pm-7:55 pm

Nonstop3h 10m

$139

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 1/17

12:00 pm-6:10 pm

1 stop6h 10m

Los Angeles

Sat 1/24

8:25 am-12:40 pm

1 stop4h 15m

$152

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 1/17

10:20 am-4:20 pm

1 stop6h 00m

Los Angeles

Sun 1/18

5:45 am-12:05 pm

1 stop6h 20m

$158

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 1/17

5:40 pm-8:20 pm

Nonstop2h 40m

Los Angeles

Sun 1/18

7:20 am-10:17 am

Nonstop2h 57m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 1/31

5:40 pm-8:20 pm

Nonstop2h 40m

Los Angeles

Sun 2/8

4:20 pm-7:13 pm

Nonstop2h 53m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 2/7

7:00 am-2:00 pm

1 stop7h 00m

Los Angeles

Mon 2/9

4:45 pm-11:40 pm

1 stop6h 55m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 1/7

1:20 pm-9:25 pm

1 stop8h 05m

Los Angeles

Sun 1/11

7:35 am-1:30 pm

1 stop5h 55m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 1/14

5:15 am-11:05 am

1 stop5h 50m

Los Angeles

Thu 1/15

3:20 pm-8:45 pm

1 stop5h 25m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Tue 1/13

12:45 pm-4:55 pm

1 stop4h 10m

Los Angeles

Thu 1/15

7:40 am-2:05 pm

2 stops6h 25m

$168

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 1/7

1:20 pm-9:25 pm

1 stop8h 05m

$79

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

Showing 1-10 of 20 results
1
2

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 December 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 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 December 16, 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 December 13, 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.

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 December 16, 2025.

The most flights from SEA to CM3 are scheduled on a Monday (115 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (22 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 December 16, 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
11,460 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.0

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
11,460 reviews
Alaska Airlines
8.0
Very good
11,460 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.0

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
8,010 reviews
Alaska Airlines
8.0
Very good
11,460 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.0

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
9,093 reviews
Alaska Airlines
8.0
Very good
11,460 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.0

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
8,186 reviews
Alaska Airlines
8.0
Very good
11,460 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.0

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
3,082 reviews
Alaska Airlines
8.0
Very good
11,460 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.0

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 74 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 296 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 and Southwest 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 3h 11m. 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 Frontier. According to our data, you can fly for as low as $36. Users have also found prices from $38 and $75 on Spirit Airlines and Southwest, 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 SAUDIA (100%), ITA Airways (96%) or Virgin Australia (95%) 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 $740, our data indicates the cheapest price to be $61. The most popular route (Seattle/Tacoma Intl - Los Angeles), is priced around $79.

  • 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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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 December 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$50Average$163FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$73Average$154FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$98Average$262FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$113Average$247FlexibilityNo cancel feeOn-time63%
DeltaCheapest$119Average$251FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$138Average$253FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$147Average$299FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$176Average$306FlexibilityNo cancel feeOn-time71%

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