$111+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
Aug 24 — Aug 311
Round-trip
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
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.Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Costa Mesa are usually found in March or May, booked 68 days in advance, depart on a Thursday or Friday and return on a Thursday
Cheap flight deals from Seattle to Costa Mesa
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to Costa MesaExplore 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 25, 2026.
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 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/24. 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.
Tue 8/1810:34 am
SEA
- LAX
Nonstop3h 00m
Frontier
Mon 8/243:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 7/24![Frontier logo]()
$151
This Frontier deal was found by Cheapflights users on 7/22. 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 8/2010:34 am
SEA
- LAX
Nonstop3h 00m
Frontier
Sun 10/183:16 pm
LAX
- SEA
Nonstop3h 10m
Frontier
Deal found 7/22![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 7/20. 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.
Tue 9/17:07 pm
SEA
- LAX
1 stop13h 48m
Frontier
Sat 9/59:09 pm
LAX
- SEA
1 stop12h 10m
Frontier
Deal found 7/20![Frontier logo]()
$153
This WAYA deal was found by Cheapflights users on 7/22. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/93:45 pm
SEA
- LAX
1 stop5h 16m
Multiple Airlines
Sat 9/1210:07 am
LAX
- SEA
Nonstop2h 53m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 10/241:55 pm
SEA
- LAX
1 stop4h 29m
Multiple Airlines
Tue 10/273:16 pm
LAX
- SEA
Nonstop3h 10m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$155
This Frontier deal was found by Cheapflights users on 7/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1910:34 am
SEA
- LAX
Nonstop3h 00m
Frontier
Tue 8/253:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 7/24![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 8/122:22 pm
SEA
- LAX
1 stop9h 49m
Frontier
Tue 8/183:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 7/20![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Sat 9/1210:47 am
SEA
- LAX
1 stop5h 14m
Multiple Airlines
Wed 9/1610:07 am
LAX
- SEA
Nonstop2h 53m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/2610:34 am
SEA
- LAX
Nonstop3h 00m
Multiple Airlines
Wed 9/27:16 am
LAX
- SEA
1 stop5h 35m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 7/20. 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.
Thu 9/109:16 pm
SEA
- LAX
1 stop11h 04m
Frontier
Wed 9/1610:27 pm
LAX
- SEA
1 stop11h 33m
Frontier
Deal found 7/20![Frontier logo]()
$160
This Frontier deal was found by Cheapflights users on 7/21. 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 10/2211:06 am
SEA
- LAX
Nonstop2h 55m
Frontier
Mon 10/2611:47 am
LAX
- SEA
1 stop5h 58m
Frontier
Deal found 7/21![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 10/2311:06 am
SEA
- LAX
Nonstop2h 55m
Frontier
Sat 10/243:16 pm
LAX
- SEA
Nonstop3h 10m
Frontier
Deal found 7/21![Frontier logo]()
$162
Best flights from Seattle to Costa MesaDiscover carefully curated flight deals from Seattle to Costa Mesa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 25, 2026.
Discover carefully curated flight deals from Seattle to Costa Mesa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 25, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/189:18 pm
SEA
- LAX
Nonstop2h 47m
Alaska Airlines
Thu 8/275:50 pm
LAX
- SEA
Nonstop2h 49m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$197
This Delta deal was found by Cheapflights users on 7/20. 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.
Sat 9/1212:35 pm
SEA
- LAX
Nonstop2h 48m
Delta
Mon 9/142:00 pm
LAX
- SEA
Nonstop2h 44m
Delta
Deal found 7/20![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 7/20. 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 9/26:40 am
SEA
- LAX
1 stop8h 55m
Southwest
Sun 9/64:55 pm
LAX
- SEA
1 stop4h 15m
Southwest
Deal found 7/20![Southwest logo]()
$227
This United Airlines deal was found by Cheapflights users on 7/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:30 am
SEA
- LAX
Nonstop3h 04m
United Airlines
Sun 8/306:50 pm
LAX
- SEA
Nonstop2h 51m
United Airlines
Deal found 7/24![United Airlines logo]()
$237
This Southwest deal was found by Cheapflights users on 7/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:25 pm
SEA
- LAX
2 stops6h 25m
Southwest
Tue 8/251:25 pm
LAX
- SEA
1 stop6h 50m
Southwest
Deal found 7/24![Southwest logo]()
$232
This Alaska Airlines deal was found by Cheapflights users on 7/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/81:03 pm
SEA
- LAX
1 stop7h 02m
Alaska Airlines
Tue 9/156:15 pm
LAX
- SEA
1 stop4h 24m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$237
This United Airlines deal was found by Cheapflights users on 7/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:52 pm
SEA
- LAX
Nonstop2h 49m
United Airlines
Mon 9/147:00 pm
LAX
- SEA
Nonstop2h 51m
United Airlines
Deal found 7/23![United Airlines logo]()
$247
This Delta deal was found by Cheapflights users on 7/21. 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 9/412:36 pm
SEA
- LAX
Nonstop2h 48m
Delta
Tue 9/87:05 am
LAX
- SEA
Nonstop2h 50m
Delta
Deal found 7/21![Delta logo]()
$262
This Southwest deal was found by Cheapflights users on 7/20. 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.
Tue 9/17:10 am
SEA
- LAX
1 stop5h 55m
Southwest
Fri 9/47:10 pm
LAX
- SEA
1 stop5h 30m
Southwest
Deal found 7/20![Southwest logo]()
$242
This United Airlines deal was found by Cheapflights users on 7/20. 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.
Tue 8/116:30 am
SEA
- LAX
Nonstop2h 46m
United Airlines
Sun 8/169:37 am
LAX
- SEA
1 stop4h 47m
United Airlines
Deal found 7/20![United Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 7/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:30 am
SEA
- LAX
1 stop5h 15m
Southwest
Sun 9/134:30 pm
LAX
- SEA
1 stop4h 45m
Southwest
Deal found 7/24![Southwest logo]()
$257
This Southwest deal was found by Cheapflights users on 7/21. 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.
Fri 9/253:25 pm
SEA
- LAX
2 stops6h 25m
Southwest
Mon 9/2811:30 am
LAX
- SEA
1 stop7h 20m
Southwest
Deal found 7/21![Southwest logo]()
$262
Last-minute flights from Seattle to Costa MesaDiscover last-minute flight deals from Seattle to Costa Mesa. Data last updated July 25, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Costa Mesa. Data last updated July 25, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 8/122:22 pm
SEA
- LAX
1 stop9h 49m
Frontier
Tue 8/183:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 7/20![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 7/24. 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.
Tue 8/1810:34 am
SEA
- LAX
Nonstop3h 00m
Frontier
Mon 8/243:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 7/24![Frontier logo]()
$151
This Frontier deal was found by Cheapflights users on 7/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1910:34 am
SEA
- LAX
Nonstop3h 00m
Frontier
Tue 8/253:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 7/24![Frontier logo]()
$156
This Frontier deal was found by Cheapflights users on 7/22. 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 8/2010:34 am
SEA
- LAX
Nonstop3h 00m
Frontier
Sun 10/183:16 pm
LAX
- SEA
Nonstop3h 10m
Frontier
Deal found 7/22![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 7/24. 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.
Thu 8/2010:34 am
SEA
- LAX
Nonstop3h 00m
Frontier
Wed 8/263:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 7/24![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 7/24. 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 8/219:29 pm
SEA
- LAX
1 stop12h 00m
Frontier
Wed 8/263:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 7/24![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 8/2210:34 am
SEA
- LAX
Nonstop3h 00m
Frontier
Wed 8/263:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 7/21![Frontier logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/221:34 pm
SEA
- LAX
1 stop5h 23m
Multiple Airlines
Tue 9/13:04 pm
LAX
- SEA
Nonstop2h 47m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$158
This Frontier deal was found by Cheapflights users on 7/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2610:34 am
SEA
- LAX
Nonstop3h 00m
Frontier
Sat 9/53:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 7/24![Frontier logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/2610:34 am
SEA
- LAX
Nonstop3h 00m
Multiple Airlines
Wed 9/27:16 am
LAX
- SEA
1 stop5h 35m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$159
This Expedia deal was found by Cheapflights users on 7/22. 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 8/2810:34 am
SEA
- LAX
Nonstop3h 00m
Frontier
Mon 8/319:09 pm
LAX
- SEA
1 stop16h 13m
Frontier
Deal found 7/22![Frontier logo]()
$161
This Super.com deal was found by Cheapflights users on 7/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2910:34 am
SEA
- LAX
Nonstop3h 00m
Frontier
Mon 8/313:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 7/24![Frontier logo]()
$155
One-way flights from Seattle to Costa MesaSearch for one-way flight options from Seattle to Costa Mesa. Find affordable one-way fares based on user searches. Data last updated July 25, 2026.
Search for one-way flight options from Seattle to Costa Mesa. Find affordable one-way fares based on user searches. Data last updated July 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/1510:34 am
SEA
- LAX
Nonstop3h 00m
Frontier
Deal found 7/22![Frontier logo]()
$111
This Alaska Airlines deal was found by Cheapflights users on 7/22. 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.
Wed 9/212:05 pm
SEA
- LAX
1 stop5h 17m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$112
This Southwest deal was found by Cheapflights users on 7/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/292:20 pm
SEA
- LAX
1 stop4h 15m
Southwest
Deal found 7/23![Southwest logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 7/22. 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.
Tue 8/188:53 pm
SEA
- LAX
2 stops25h 01m
Frontier
Deal found 7/22![Frontier logo]()
$115
This Kiwi.com deal was found by Cheapflights users on 7/24. 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.
Thu 9/34:33 pm
SEA
- LAX
1 stop6h 06m
Frontier
Deal found 7/24![Frontier logo]()
$116
This Alaska Airlines deal was found by Cheapflights users on 7/22. 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 9/197:18 am
SEA
- LAX
1 stop9h 54m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/128:13 pm
SEA
- LAX
1 stop24h 01m
Frontier
Deal found 7/22![Frontier logo]()
$118
This Alaska Airlines deal was found by Cheapflights users on 7/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/267:08 am
SEA
- LAX
1 stop6h 30m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$119
This American Airlines deal was found by Cheapflights users on 7/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:10 am
SEA
- LAX
Nonstop3h 06m
American Airlines
Deal found 7/21![American Airlines logo]()
$120
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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.
Thu 9/177:18 am
SEA
- LAX
1 stop6h 35m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Fri 8/148:53 pm
SEA
- LAX
1 stop18h 12m
Frontier
Deal found 7/23![Frontier logo]()
$123
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 July 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $151 (Kiwi.com) |
One-way from | $111 (Kiwi.com) |
Popular in | July |
Cheapest in | March |
Average price | $296 |
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 25, 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
Cheapest round-trip
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Tue 8/18
9:18 pm-12:05 am
Nonstop2h 47m
Los Angeles
Thu 8/27
5:50 pm-8:39 pm
Nonstop2h 49m
$197
Quickest round-trip
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Sat 9/12
12:35 pm-3:23 pm
Nonstop2h 48m
Los Angeles
Mon 9/14
2:00 pm-4:44 pm
Nonstop2h 44m
$217
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Wed 9/2
6:40 am-3:35 pm
1 stop8h 55m
Los Angeles
Sun 9/6
4:55 pm-9:10 pm
1 stop4h 15m
$227
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Fri 8/21
3:25 pm-9:50 pm
2 stops6h 25m
Los Angeles
Tue 8/25
1:25 pm-8:15 pm
1 stop6h 50m
$232
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Sun 8/23
6:30 am-9:34 am
Nonstop3h 04m
Los Angeles
Sun 8/30
6:50 pm-9:41 pm
Nonstop2h 51m
$237
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Tue 9/8
1:03 pm-8:05 pm
1 stop7h 02m
Los Angeles
Tue 9/15
6:15 pm-10:39 pm
1 stop4h 24m
$237
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Tue 9/1
7:10 am-1:05 pm
1 stop5h 55m
Los Angeles
Fri 9/4
7:10 pm-12:40 am
1 stop5h 30m
$242
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Thu 9/10
6:52 pm-9:41 pm
Nonstop2h 49m
Los Angeles
Mon 9/14
7:00 pm-9:51 pm
Nonstop2h 51m
$247
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Tue 8/11
6:30 am-9:16 am
Nonstop2h 46m
Los Angeles
Sun 8/16
9:37 am-2:24 pm
1 stop4h 47m
$257
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Thu 9/10
5:30 am-10:45 am
1 stop5h 15m
Los Angeles
Sun 9/13
4:30 pm-9:15 pm
1 stop4h 45m
$257
Showing 1-10 of 24 resultsSorted by cheapest first
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.
SEA-LAX
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
SEA-CM3
SEA-LAX
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 25, 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 morning, which can drop the price by up to 7% versus a flight in the afternoon.
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 25, 2026.
The most flights from SEA to CM3 are scheduled on a Friday (111 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (65 on average).
How much does it cost to fly round-trip from Seattle to Costa Mesa?
Airfare is below average for this route at the moment.
Seattle to Costa Mesa flights typically cost between $208 and $338 in August.The cheapest round-trip price found within the last 5 days was $151 on Frontier (Aug 18-Aug 24).
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 18, 2026.
Travelers seeking maximum savings on their Seattle to Costa Mesa flight should consider departing on Wednesday mornings 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.
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 25, 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.
Food
7.0
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
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.
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.
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Alternative routes for Seattle to Costa Mesa
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Costa Mesa by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Costa Mesa by cabin class
Find flights from Seattle to Costa Mesa, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Costa Mesa flights
Browse other Seattle and Costa Mesa flight options. Last updated on July 25, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on July 25, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Seattle to Costa Mesa flights
Consider these flights traveling from Seattle to Costa Mesa.
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 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$44 | Average$213 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$98 | Average$315 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$110 | Average$266 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$136 | Average$238 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$137 | Average$299 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$150 | Average$267 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$158 | Average$284 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$194 | Average$351 | FlexibilityNo cancel fee | On-time71% |