$64+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
Apr 15 — Apr 221
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 May or March, booked 65 days in advance, depart on a Thursday or Friday and return on a Friday
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 March 16, 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 March 16, 2026.
This eDestinos deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2110:57 am
SEA
- LAX
Nonstop2h 48m
Frontier
Sat 4/252:45 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/14![Frontier logo]()
$97
This Frontier deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2810:57 am
SEA
- LAX
Nonstop2h 48m
Frontier
Wed 4/292:45 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/12![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 4/217:12 pm
SEA
- LAX
1 stop28h 02m
Frontier
Thu 4/302:45 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/11![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1410:57 am
SEA
- LAX
Nonstop2h 48m
Frontier
Fri 4/242:55 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/15![Frontier logo]()
$103
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2310:57 am
SEA
- LAX
Nonstop2h 48m
Frontier
Sat 4/252:45 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/13![Frontier logo]()
$106
This CheapOair deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/711:06 am
SEA
- LAX
Nonstop2h 57m
Frontier
Sat 5/162:24 pm
LAX
- SEA
Nonstop3h 13m
Frontier
Deal found 3/13![Frontier logo]()
$107
This Frontier deal was found by Cheapflights users on 3/11. 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 4/2110:57 am
SEA
- LAX
Nonstop2h 48m
Frontier
Mon 4/272:55 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/11![Frontier logo]()
$108
This Orbitz deal was found by Cheapflights users on 3/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2910:57 am
SEA
- LAX
Nonstop2h 48m
Multiple Airlines
Tue 5/512:51 pm
LAX
- SEA
1 stop6h 09m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$109
This Trip.com deal was found by Cheapflights users on 3/11. 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 4/2210:57 am
SEA
- LAX
Nonstop2h 48m
Multiple Airlines
Wed 4/296:13 am
LAX
- SEA
1 stop6h 31m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$110
This Frontier deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1410:57 am
SEA
- LAX
Nonstop2h 48m
Frontier
Thu 4/232:45 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/15![Frontier logo]()
$111
This Expedia deal was found by Cheapflights users on 3/16. 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.
Wed 4/2210:57 am
SEA
- LAX
Nonstop2h 48m
Multiple Airlines
Wed 5/612:51 pm
LAX
- SEA
1 stop6h 09m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:45 pm
SEA
- LAX
1 stop19h 30m
Frontier
Fri 4/242:55 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/13![Frontier logo]()
$113
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 March 16, 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 March 16, 2026.
This Alaska Airlines deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/132:25 pm
SEA
- LAX
Nonstop2h 45m
Alaska Airlines
Sat 5/161:39 pm
LAX
- SEA
Nonstop2h 57m
Alaska Airlines
Deal found 3/15![Alaska Airlines logo]()
$147
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/237:20 am
SEA
- LAX
1 stop9h 45m
Southwest
Thu 4/307:50 pm
LAX
- SEA
1 stop5h 05m
Southwest
Deal found 3/12![Southwest logo]()
$178
This United Airlines deal was found by Cheapflights users on 3/11. 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.
Wed 4/86:00 am
SEA
- LAX
Nonstop2h 45m
United Airlines
Mon 4/133:40 pm
LAX
- SEA
1 stop7h 47m
United Airlines
Deal found 3/11![United Airlines logo]()
$187
This Alaska Airlines deal was found by Cheapflights users on 3/11. 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 4/282:53 pm
SEA
- LAX
1 stop4h 35m
Alaska Airlines
Wed 4/296:13 am
LAX
- SEA
1 stop6h 31m
Alaska Airlines
Deal found 3/11![Alaska Airlines logo]()
$161
This Alaska Airlines deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/188:30 am
SEA
- LAX
1 stop4h 33m
Alaska Airlines
Thu 4/236:00 pm
LAX
- SEA
1 stop5h 41m
Alaska Airlines
Deal found 3/15![Alaska Airlines logo]()
$167
This Alaska Airlines deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/211:22 am
SEA
- LAX
1 stop9h 07m
Alaska Airlines
Sun 5/36:30 am
LAX
- SEA
Nonstop2h 59m
Alaska Airlines
Deal found 3/15![Alaska Airlines logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/28:27 pm
SEA
- LAX
1 stop13h 10m
Alaska Airlines
Mon 4/67:40 pm
LAX
- SEA
Nonstop3h 02m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$240
This Alaska Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/310:50 pm
SEA
- LAX
1 stop9h 39m
Alaska Airlines
Sat 4/47:40 pm
LAX
- SEA
Nonstop3h 02m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$280
This Alaska Airlines deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/119:15 pm
SEA
- LAX
Nonstop2h 44m
Alaska Airlines
Tue 4/148:00 am
LAX
- SEA
Nonstop3h 02m
Alaska Airlines
Deal found 3/14![Alaska Airlines logo]()
$317
Last-minute flights from Seattle to Costa MesaDiscover last-minute flight deals from Seattle to Costa Mesa. Data last updated March 16, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Costa Mesa. Data last updated March 16, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1410:57 am
SEA
- LAX
Nonstop2h 48m
Frontier
Fri 4/242:55 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/15![Frontier logo]()
$103
This Frontier deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1410:57 am
SEA
- LAX
Nonstop2h 48m
Frontier
Thu 4/232:45 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/15![Frontier logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:45 pm
SEA
- LAX
1 stop19h 30m
Frontier
Fri 4/242:55 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/13![Frontier logo]()
$113
This eDestinos deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2110:57 am
SEA
- LAX
Nonstop2h 48m
Frontier
Sat 4/252:45 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/14![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 4/217:12 pm
SEA
- LAX
1 stop28h 02m
Frontier
Thu 4/302:45 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/11![Frontier logo]()
$101
This Frontier deal was found by Cheapflights users on 3/11. 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 4/2110:57 am
SEA
- LAX
Nonstop2h 48m
Frontier
Mon 4/272:55 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/11![Frontier logo]()
$108
This Trip.com deal was found by Cheapflights users on 3/11. 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 4/2210:57 am
SEA
- LAX
Nonstop2h 48m
Multiple Airlines
Wed 4/296:13 am
LAX
- SEA
1 stop6h 31m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$110
This Frontier deal was found by Cheapflights users on 3/16. 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 4/2210:57 am
SEA
- LAX
Nonstop2h 48m
Frontier
Fri 4/242:55 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/16![Frontier logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2310:57 am
SEA
- LAX
Nonstop2h 48m
Frontier
Sat 4/252:45 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/13![Frontier logo]()
$106
This Expedia deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2310:57 am
SEA
- LAX
Nonstop2h 48m
Multiple Airlines
Tue 4/289:21 am
LAX
- SEA
1 stop6h 15m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$107
This Frontier deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2810:57 am
SEA
- LAX
Nonstop2h 48m
Frontier
Wed 4/292:45 pm
LAX
- SEA
Nonstop2h 57m
Frontier
Deal found 3/12![Frontier logo]()
$98
This Orbitz deal was found by Cheapflights users on 3/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2910:57 am
SEA
- LAX
Nonstop2h 48m
Multiple Airlines
Tue 5/512:51 pm
LAX
- SEA
1 stop6h 09m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$109
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 March 16, 2026.
Search for one-way flight options from Seattle to Costa Mesa. Find affordable one-way fares based on user searches. Data last updated March 16, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/49:19 pm
SEA
- LAX
1 stop11h 44m
Frontier
Deal found 3/13![Frontier logo]()
$64
This Kiwi.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1111:37 am
SEA
- LAX
1 stop21h 26m
Frontier
Deal found 3/15![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/139:34 pm
SEA
- LAX
1 stop11h 32m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$66
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1210:01 pm
SEA
- LAX
1 stop23h 50m
Frontier
Deal found 3/13![Frontier logo]()
$67
This United Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/136:58 pm
SEA
- LAX
Nonstop2h 45m
United Airlines
Deal found 3/13![United Airlines logo]()
$69
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/26:25 am
SEA
- LAX
1 stop4h 10m
Southwest
Deal found 3/12![Southwest logo]()
$71
This iWofly deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/144:00 pm
SEA
- LAX
1 stop5h 31m
Hawaiian Airlines
Deal found 3/15![Hawaiian Airlines logo]()
$72
This Super.com deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2711:21 am
SEA
- LAX
Nonstop2h 57m
Frontier
Deal found 3/11![Frontier logo]()
$73
This iWofly deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/811:06 am
SEA
- LAX
Nonstop2h 57m
Frontier
Deal found 3/14![Frontier logo]()
$75
This Southwest deal was found by Cheapflights users on 3/11. 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 4/292:20 pm
SEA
- LAX
1 stop7h 40m
Southwest
Deal found 3/11![Southwest logo]()
$76
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 March 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $97 (eDestinos) |
One-way from | $64 (Kiwi.com) |
Popular in | December |
Cheapest in | May |
Average price | $207 |
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 March 16, 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
Quickest round-trip
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Wed 5/13
2:25 pm-5:10 pm
Nonstop2h 45m
Los Angeles Los Angeles
Sat 5/16
1:39 pm-4:36 pm
Nonstop2h 57m
$147
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Tue 4/28
2:53 pm-7:28 pm
1 stop4h 35m
Los Angeles Los Angeles
Wed 4/29
6:13 am-12:44 pm
1 stop6h 31m
$161
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Sat 4/18
8:30 am-1:03 pm
1 stop4h 33m
Los Angeles Los Angeles
Thu 4/23
6:00 pm-11:41 pm
1 stop5h 41m
$167
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Thu 4/23
7:20 am-5:05 pm
1 stop9h 45m
Los Angeles Los Angeles
Thu 4/30
7:50 pm-12:55 am
1 stop5h 05m
$178
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Wed 4/8
6:00 am-8:45 am
Nonstop2h 45m
Los Angeles Los Angeles
Mon 4/13
3:40 pm-11:27 pm
1 stop7h 47m
$187
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Sat 5/2
11:22 am-8:29 pm
1 stop9h 07m
Los Angeles Los Angeles
Sun 5/3
6:30 am-9:29 am
Nonstop2h 59m
$207
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Thu 4/2
8:27 pm-9:37 am
1 stop13h 10m
Los Angeles Los Angeles
Mon 4/6
7:40 pm-10:42 pm
Nonstop3h 02m
$240
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Fri 4/3
10:50 pm-8:29 am
1 stop9h 39m
Los Angeles Los Angeles
Sat 4/4
7:40 pm-10:42 pm
Nonstop3h 02m
$280
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Sat 4/11
9:15 pm-11:59 pm
Nonstop2h 44m
Los Angeles Los Angeles
Tue 4/14
8:00 am-11:02 am
Nonstop3h 02m
$317
Cheapest one-way
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Wed 5/13
11:40 am-5:25 pm
1 stop5h 45m
$79
Showing 1-10 of 19 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
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 March 13, 2026.
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 65 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, June is the cheapest month in which you can book a flight from Seattle to Costa Mesa (average of $55). Flying from Seattle to Costa Mesa in July is currently the most expensive (average of $119). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from SEA to CM3?
Find hourly flight availability from Seattle to Costa Mesa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 16, 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 11% versus a flight in the morning.
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 March 14, 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 March 16, 2026.
The most flights from SEA to CM3 are scheduled on a Monday (105 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (51 on average).
Reviews of airlines servicing Costa Mesa
Get insights into the airlines that provide service to Costa Mesa. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Costa Mesa. Reviews last updated March 16, 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.
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.1
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.1
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.1
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.1
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.1
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.1
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
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.
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Alternative routes for Seattle to Costa Mesa
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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 March 16, 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 March 16, 2026.
Popular flight searches
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Seattle to Costa Mesa flights
Consider these flights traveling from Seattle to Costa Mesa.
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 March 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$44 | Average$189 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$48 | Average$154 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$98 | Average$272 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$107 | Average$244 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$113 | Average$245 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$136 | Average$272 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$139 | Average$316 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$148 | Average$285 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$179 | Average$317 | FlexibilityNo cancel fee | On-time71% |