HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Costa Mesa

$42+ 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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Costa Mesa with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from Seattle/Tacoma Intl to Costa Mesa are usually found in January or September, booked 30 days in advance, depart on a Thursday or Friday and return on a Thursday

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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$71
(Frontier)

One-way from

$42
(Kiwi.com)

Popular in

April

Cheapest in

January

Average price

$218
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
Highest demand for flights based on searches. 10% potential increase in price ($27 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals

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 February 20, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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.
Wed 3/266:53 pmSEA - LAX
Nonstop2h 42mFrontier
Wed 4/24:01 pmLAX - SEA
Nonstop3h 00mFrontier
Deal found 2/20$72
This Kiwi.com deal was found by Cheapflights users on 2/20. 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 4/302:30 pmSEA - LAX
Nonstop2h 53mMultiple Airlines
Tue 5/135:35 pmLAX - SEA
Nonstop3h 07mMultiple Airlines
Deal found 2/20$74
This FlightHub deal was found by Cheapflights users on 2/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/199:48 amSEA - LAX
1 stop5h 00mSpirit Airlines
Mon 3/244:11 pmLAX - SEA
Nonstop2h 58mSpirit Airlines
Deal found 2/20$85
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/217:10 amSEA - LAX
Nonstop2h 55mDelta
Fri 3/288:15 pmLAX - SEA
Nonstop2h 58mDelta
Deal found 2/20$117
This Alaska Airlines deal was found by Cheapflights users on 2/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/229:15 pmSEA - LAX
Nonstop2h 44mAlaska Airlines
Fri 3/289:02 pmLAX - SEA
Nonstop2h 57mAlaska Airlines
Deal found 2/20$147
This Southwest deal was found by Cheapflights users on 2/20. 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.
Wed 3/195:45 amSEA - LAX
2 stops7h 10mSouthwest
Sun 3/235:50 amLAX - SEA
1 stop5h 30mSouthwest
Deal found 2/20$156
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Mon 3/173:01 pmSEA - LAX
Nonstop2h 44mUnited Airlines
Tue 3/254:12 pmLAX - SEA
1 stop5h 03mUnited Airlines
Deal found 2/20$194

Find flights from Seattle to Costa Mesa within your budget

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 February 20, 2025.

Fly from

Seattle

Fly to

Costa Mesa

Route

Depart

Return

Price

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 3/26

6:53 pm-9:35 pm

Nonstop2h 42m

Los Angeles

Wed 4/2

4:01 pm-7:01 pm

Nonstop3h 00m

$72

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 4/30

2:30 pm-5:23 pm

Nonstop2h 53m

Los Angeles

Tue 5/13

5:35 pm-8:42 pm

Nonstop3h 07m

$74

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 3/19

9:48 am-2:48 pm

1 stop5h 00m

Los Angeles

Mon 3/24

4:11 pm-7:09 pm

Nonstop2h 58m

$85

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Fri 3/21

7:10 am-10:05 am

Nonstop2h 55m

Los Angeles

Fri 3/28

8:15 pm-11:13 pm

Nonstop2h 58m

$117

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 3/19

5:45 am-12:55 pm

2 stops7h 10m

Los Angeles

Sun 3/23

5:50 am-11:20 am

1 stop5h 30m

$156

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Tue 4/8

11:35 am-4:26 pm

1 stop4h 51m

Los Angeles

Sun 4/13

9:45 am-12:43 pm

Nonstop2h 58m

$177

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Mon 3/17

6:15 am-9:01 am

Nonstop2h 46m

Los Angeles

Wed 3/26

4:12 pm-9:15 pm

1 stop5h 03m

$194

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Mon 3/24

6:53 pm-9:35 pm

Nonstop2h 42m

$42

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Thu 3/27

9:48 am-3:50 pm

1 stop6h 02m

$47

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sun 3/16

1:44 pm-4:30 pm

Nonstop2h 46m

$61

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 16 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.

Travel insights for flights from Seattle to Costa Mesa

Get recent, data-driven insights about flights from Seattle to Costa Mesa including ideal travel times, pricing trends, and more.

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 February 14, 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 $344). 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 February 20, 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 February 16, 2025.

Travelers seeking maximum savings on their Seattle to Costa Mesa flight should consider departing on Tuesday 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 February 20, 2025.

The most flights from SEA to CM3 are scheduled on a Thursday (123 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (38 on average).

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 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. July is typically the driest time to visit Costa Mesa when rainfall is around 0.0 in.

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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

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 February 20, 2025.
To help decide which airline to fly from Seattle to Costa Mesa, see what other customers have to say about Southwest, Alaska Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,697 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,219 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
8,765 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

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 71 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 258 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 Frontier. According to our data, you can fly for as low as $42. Users have also found prices from $48 and $76 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 Horizon Air (100%), KLM (94%) or ITA Airways (93%) 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 $722, our data indicates the cheapest price to be $40. The most popular route (Seattle/Tacoma Intl - Los Angeles), is priced around $52.

  • 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 $344). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Costa Mesa

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Los Angeles flights
Seattle to Las Vegas flights
Seattle to San Diego flights
Seattle to San Francisco flights
Seattle to Santa Ana flights
Portland to Los Angeles flights
Seattle to Ontario flights
Seattle to Palm Springs flights
Seattle to Burbank flights
Portland to Las Vegas flights
Seattle to San Jose flights
Everett to Las Vegas flights
Portland to San Diego flights
Portland to Santa Ana flights
Portland to Burbank flights
Portland to Ontario flights
Seattle to Sacramento flights
Portland to Palm Springs flights
Portland to San Francisco flights
Everett to Los Angeles flights
Seattle to Oakland flights
Everett to San Francisco flights
Everett to San Diego flights
Everett to Santa Ana flights
Seattle to Reno flights
Portland to Sacramento flights
Portland to Oakland flights
Portland to San Jose flights
Seattle to Santa Barbara flights
Seattle to Long Beach flights
Seattle to Fresno flights
Spokane to Las Vegas flights
Spokane to San Diego flights
Spokane to Los Angeles flights
Portland to Reno flights
Seattle to San Luis Obispo flights
Seattle to Santa Rosa flights
Bellingham to Las Vegas flights
Portland to Santa Rosa flights
Seattle to Monterey flights
Portland to Santa Barbara flights
Pasco to Los Angeles flights
Spokane to San Francisco flights
Pasco to Las Vegas flights
Portland to Long Beach flights
Portland to San Luis Obispo flights
Spokane to Palm Springs flights
Portland to Fresno flights
Spokane to Burbank flights
Everett to San Jose flights

Top 7 airlines flying from Seattle to Costa Mesa

Discover the top 7 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$40Average$131FlexibilityNo cancel feeOn-time65%
FrontierCheapest$40Average$126FlexibilityNo cancel feeOn-time62%
DeltaCheapest$116Average$272FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$135Average$266FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$156Average$334FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$156Average$398FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$157Average$364FlexibilityNo cancel feeOn-time71%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.