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Costa Mesa

$69+ 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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
May 28 — Jun 41
Thu 5/28
Thu 6/4
1 adult, Economy
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Find cheap flights from Seattle to Costa Mesa with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Costa Mesa are usually found in May or March, booked 84 days in advance, depart on a Thursday or Friday and return on a Thursday

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 April 28, 2026.

This Booking.com deal was found by Cheapflights users on 4/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:21 am
SEA
-
LAX
Nonstop2h 57m
Frontier
Mon 6/13:15 pm
LAX
-
SEA
Nonstop3h 20m
Frontier
Deal found 4/26$90
This Trip.com deal was found by Cheapflights users on 4/27. 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.
Tue 5/1911:06 am
SEA
-
LAX
Nonstop2h 57m
Frontier
Sat 5/233:15 pm
LAX
-
SEA
Nonstop3h 20m
Frontier
Deal found 4/27$95
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Sat 5/3011:21 am
SEA
-
LAX
Nonstop2h 57m
Frontier
Wed 6/33:15 pm
LAX
-
SEA
Nonstop3h 20m
Frontier
Deal found 4/28$96
This Super.com deal was found by Cheapflights users on 4/23. 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.
Sat 5/3011:21 am
SEA
-
LAX
Nonstop2h 57m
Frontier
Mon 6/13:15 pm
LAX
-
SEA
Nonstop3h 20m
Frontier
Deal found 4/23$97
This Frontier deal was found by Cheapflights users on 4/23. 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 5/2811:21 am
SEA
-
LAX
Nonstop2h 57m
Frontier
Tue 6/23:15 pm
LAX
-
SEA
Nonstop3h 20m
Frontier
Deal found 4/23$98
This Frontier deal was found by Cheapflights users on 4/23. 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 7/911:04 am
SEA
-
LAX
Nonstop3h 01m
Frontier
Sat 7/113:25 pm
LAX
-
SEA
Nonstop2h 47m
Frontier
Deal found 4/23$101
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 7/911:04 am
SEA
-
LAX
Nonstop3h 01m
Frontier
Sun 7/193:25 pm
LAX
-
SEA
Nonstop2h 47m
Frontier
Deal found 4/23$102
This Frontier deal was found by Cheapflights users on 4/25. 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.
Tue 5/197:50 pm
SEA
-
LAX
1 stop13h 05m
Frontier
Thu 6/43:15 pm
LAX
-
SEA
Nonstop3h 20m
Frontier
Deal found 4/25$103
This Kiwi.com deal was found by Cheapflights users on 4/24. 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 5/2511:21 am
SEA
-
LAX
Nonstop2h 57m
Frontier
Tue 6/23:15 pm
LAX
-
SEA
Nonstop3h 20m
Frontier
Deal found 4/24$106
This Kiwi.com deal was found by Cheapflights users on 4/24. 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 5/2911:21 am
SEA
-
LAX
Nonstop2h 57m
Frontier
Mon 6/13:15 pm
LAX
-
SEA
Nonstop3h 20m
Frontier
Deal found 4/24$107
This CheapOair deal was found by Cheapflights users on 4/23. 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.
Thu 5/2811:21 am
SEA
-
LAX
Nonstop2h 57m
Frontier
Sat 5/303:15 pm
LAX
-
SEA
Nonstop3h 20m
Frontier
Deal found 4/23$108

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 April 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$90
(Booking.com)

One-way from

$69
(Kiwi.com)

Popular in

December

Cheapest in

May

Average price

$257
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. 5% potential increase in price ($14 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
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 April 28, 2026.
Use the filters below to find and compare flights from Seattle to Costa Mesa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 5/23

3:30 pm-10:44 pm

1 stop7h 14m

Los Angeles

Wed 5/27

4:25 pm-7:18 pm

Nonstop2h 53m

$187

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 5/30

3:55 pm-6:40 pm

Nonstop2h 45m

Los Angeles

Mon 6/1

7:59 am-10:55 am

Nonstop2h 56m

$187
Quickest round-trip

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Thu 6/4

3:00 pm-5:38 pm

Nonstop2h 38m

Los Angeles

Mon 6/8

9:15 pm-12:06 am

Nonstop2h 51m

$237

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Thu 6/11

6:30 am-9:14 am

Nonstop2h 44m

Los Angeles

Mon 6/15

7:06 pm-9:59 pm

Nonstop2h 53m

$247

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 7/25

6:30 am-9:14 am

Nonstop2h 44m

Los Angeles

Sat 8/15

7:05 pm-9:56 pm

Nonstop2h 51m

$247

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 5/20

7:08 am-11:42 am

1 stop4h 34m

Los Angeles

Tue 5/26

4:25 pm-7:18 pm

Nonstop2h 53m

$257

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Thu 5/21

9:40 am-2:05 pm

1 stop4h 25m

Los Angeles

Tue 6/2

4:10 pm-8:20 pm

1 stop4h 10m

$262

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Fri 6/5

5:15 am-12:55 pm

2 stops7h 40m

Los Angeles

Mon 6/8

5:45 pm-11:30 pm

1 stop5h 45m

$272

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 5/30

6:40 am-6:20 pm

2 stops11h 40m

Los Angeles

Mon 6/1

6:20 pm-10:30 pm

1 stop4h 10m

$272

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 7/15

3:25 pm-10:15 pm

1 stop6h 50m

Los Angeles

Sun 7/19

6:00 am-10:20 am

1 stop4h 20m

$311

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/24

Showing 1-10 of 23 resultsSorted by cheapest first
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

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 April 28, 2026.

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 5% 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 April 25, 2026.

Travelers seeking maximum savings on their Seattle to Costa Mesa flight should consider departing on Tuesday afternoons 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 April 28, 2026.

The most flights from SEA to CM3 are scheduled on a Monday (94 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (43 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 April 28, 2026.
Read reviews from past customers who have flown Alaska Airlines,Delta, andUnited 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
7.9
Good
12,313 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
7.9
Good
12,313 reviews
Alaska Airlines
7.9
Good
12,313 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,467 reviews
Alaska Airlines
7.9
Good
12,313 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
United Airlines
7.4
Good
9,680 reviews
Alaska Airlines
7.9
Good
12,313 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
American Airlines
7.1
Good
11,680 reviews
Alaska Airlines
7.9
Good
12,313 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Frontier
5.7
Fair
2,970 reviews
Alaska Airlines
7.9
Good
12,313 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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 62 outbound flights to Costa Mesa per day. You should also have plenty of airline options to choose from since 9 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 306 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 Delta fly from Seattle to Costa Mesa in about 2h 45m. The time it takes to get you to your destination can typically vary by up to 4h 29m. 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 $38. Users have also found prices from $54 and $87 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 ITA Airways (100%), Air China (97%) or China Eastern (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 $782, our data indicates the cheapest price to be $78. The most popular route (Seattle/Tacoma Intl - Los Angeles), is priced around $117.

  • 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.

See more FAQs

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Alternative routes for Seattle to Costa Mesa

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Top 9 airlines flying from Seattle to Costa Mesa

Discover the top 9 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 April 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$44Average$194FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$73Average$176FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$98Average$290FlexibilityNo cancel feeOn-time85%
DeltaCheapest$107Average$248FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$113Average$320FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$130Average$242FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$136Average$272FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$153Average$293FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$182Average$330FlexibilityNo cancel feeOn-time71%

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