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Costa Mesa

$92+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 Friday or Thursday and return on a Saturday

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 July 31, 2025.

Round-trip from

$146
(Kiwi.com)

One-way from

$92
(Trip.com)

Popular in

July

Cheapest in

January

Average price

$259
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. 13% potential increase in price ($31 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/30. 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 9/139:39 pmSEA - LAX
Nonstop2h 50mMultiple Airlines
Sat 9/207:00 amLAX - SEA
1 stop7h 26mMultiple Airlines
Deal found 7/30$146
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Thu 10/306:23 pmSEA - LAX
Nonstop2h 49mFrontier
Sat 11/19:31 pmLAX - SEA
Nonstop2h 56mFrontier
Deal found 7/30$147
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Wed 9/1010:08 amSEA - LAX
Nonstop2h 58mHawaiian Airlines
Wed 9/173:40 pmLAX - SEA
Nonstop2h 45mHawaiian Airlines
Deal found 7/30$154
This Trip.com deal was found by Cheapflights users on 7/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/208:00 amSEA - LAX
Nonstop3h 00mAlaska Airlines
Sat 8/236:00 amLAX - SEA
Nonstop2h 53mAlaska Airlines
Deal found 7/30$155
This Southwest deal was found by Cheapflights users on 7/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/208:10 amSEA - LAX
1 stop4h 40mSouthwest
Sat 9/273:20 pmLAX - SEA
1 stop6h 30mSouthwest
Deal found 7/30$172
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/216:25 amSEA - LAX
Nonstop2h 45mUnited Airlines
Sun 8/3110:35 amLAX - SEA
Nonstop2h 55mUnited Airlines
Deal found 7/29$188

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 July 31, 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

Sat 9/13

9:39 pm-12:29 am

Nonstop2h 50m

Los Angeles

Sat 9/20

7:00 am-2:26 pm

1 stop7h 26m

$146

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Thu 10/30

6:23 pm-9:12 pm

Nonstop2h 49m

Los Angeles

Sat 11/1

9:31 pm-12:27 am

Nonstop2h 56m

$147

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 9/10

10:08 am-1:06 pm

Nonstop2h 58m

Los Angeles

Wed 9/17

3:40 pm-6:25 pm

Nonstop2h 45m

$154

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 8/20

8:00 am-11:00 am

Nonstop3h 00m

Los Angeles

Sat 8/23

6:00 am-8:53 am

Nonstop2h 53m

$155

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 9/20

8:10 am-12:50 pm

1 stop4h 40m

Los Angeles

Sat 9/27

3:20 pm-9:50 pm

1 stop6h 30m

$172

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Thu 8/21

6:25 am-9:10 am

Nonstop2h 45m

Los Angeles

Sun 8/31

10:35 am-1:30 pm

Nonstop2h 55m

$188

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Mon 8/18

3:11 pm-11:58 pm

1 stop8h 47m

$92

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Tue 9/2

11:10 pm-9:48 am

1 stop10h 38m

$94

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Tue 10/14

6:00 am-1:18 pm

1 stop7h 18m

$96

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Tue 9/2

7:59 pm-10:56 pm

Nonstop2h 57m

$97

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 15 results
1
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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 July 25, 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 $326). 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 July 31, 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 July 27, 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. Sunday afternoons 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 July 31, 2025.

The most flights from SEA to CM3 are scheduled on a Monday (145 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (57 on average).

How much does it cost to fly round-trip from Seattle 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 July 31, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta 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

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

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

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

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.
Southwest
8.0
Very good
4,244 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

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
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

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.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

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
8,902 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

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 105 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 295 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as $94. Users have also found prices from $96 and $97 on Frontier and Hawaiian 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%), Air France (95%) or ITA Airways (92%) 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 $1,133, our data indicates the cheapest price to be $92. The most popular route (Seattle/Tacoma Intl - Los Angeles), is priced around $99.

  • 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 $326). 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.

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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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$44Average$145FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$63Average$143FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$98Average$264FlexibilityNo cancel feeOn-time85%
DeltaCheapest$117Average$259FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$136Average$270FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$146Average$272FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$153Average$271FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$157Average$300FlexibilityNo cancel feeOn-time71%

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