$84+ 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
Jul 10 — Jul 171
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 January, booked 65 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 June 10, 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 June 10, 2026.
This Expedia deal was found by Cheapflights users on 6/5. 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.
Tue 8/2511:03 am
SEA
- LAX
Nonstop2h 58m
Frontier
Wed 8/263:25 pm
LAX
- SEA
Nonstop3h 01m
Frontier
Deal found 6/5![Frontier logo]()
$128
This Super.com deal was found by Cheapflights users on 6/7. 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.
Thu 9/2411:06 am
SEA
- LAX
Nonstop2h 55m
Frontier
Sat 9/2610:07 am
LAX
- SEA
Nonstop2h 53m
Frontier
Deal found 6/7![Frontier logo]()
$132
This Frontier deal was found by Cheapflights users on 6/9. 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.
Fri 10/211:06 am
SEA
- LAX
Nonstop2h 55m
Frontier
Tue 10/610:07 am
LAX
- SEA
Nonstop2h 53m
Frontier
Deal found 6/9![Frontier logo]()
$133
This Frontier deal was found by Cheapflights users on 6/9. 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 9/222:15 pm
SEA
- LAX
Nonstop2h 48m
Frontier
Mon 9/283:16 pm
LAX
- SEA
Nonstop3h 10m
Frontier
Deal found 6/9![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 6/6. 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 9/2411:06 am
SEA
- LAX
Nonstop2h 55m
Frontier
Mon 9/283:16 pm
LAX
- SEA
Nonstop3h 10m
Frontier
Deal found 6/6![Frontier logo]()
$136
This Super.com deal was found by Cheapflights users on 6/5. 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 10/32:15 pm
SEA
- LAX
Nonstop2h 48m
Frontier
Sat 10/103:16 pm
LAX
- SEA
Nonstop3h 10m
Frontier
Deal found 6/5![Frontier logo]()
$137
This Frontier deal was found by Cheapflights users on 6/9. 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 9/232:15 pm
SEA
- LAX
Nonstop2h 48m
Frontier
Fri 9/253:16 pm
LAX
- SEA
Nonstop3h 10m
Frontier
Deal found 6/9![Frontier logo]()
$138
This Super.com deal was found by Cheapflights users on 6/5. 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 9/211:03 am
SEA
- LAX
Nonstop2h 58m
Frontier
Sat 9/53:25 pm
LAX
- SEA
Nonstop3h 01m
Frontier
Deal found 6/5![Frontier logo]()
$142
This Frontier deal was found by Cheapflights users on 6/7. 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.
Sun 9/611:03 am
SEA
- LAX
Nonstop2h 58m
Frontier
Thu 9/103:16 pm
LAX
- SEA
Nonstop3h 10m
Frontier
Deal found 6/7![Frontier logo]()
$143
This Super.com deal was found by Cheapflights users on 6/5. 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.
Fri 9/1111:06 am
SEA
- LAX
Nonstop2h 55m
Frontier
Mon 9/143:16 pm
LAX
- SEA
Nonstop3h 10m
Frontier
Deal found 6/5![Frontier logo]()
$146
This Super.com deal was found by Cheapflights users on 6/5. 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.
Fri 9/1811:06 am
SEA
- LAX
Nonstop2h 55m
Frontier
Thu 9/243:16 pm
LAX
- SEA
Nonstop3h 10m
Frontier
Deal found 6/5![Frontier logo]()
$147
This Frontier deal was found by Cheapflights users on 6/9. 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.
Mon 9/2111:06 am
SEA
- LAX
Nonstop2h 55m
Frontier
Fri 9/253:16 pm
LAX
- SEA
Nonstop3h 10m
Frontier
Deal found 6/9![Frontier logo]()
$148
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 June 10, 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 June 10, 2026.
This Southwest deal was found by Cheapflights users on 6/9. 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 10/79:20 am
SEA
- LAX
1 stop4h 10m
Southwest
Sat 10/101:15 pm
LAX
- SEA
1 stop6h 30m
Southwest
Deal found 6/9![Southwest logo]()
$222
This United Airlines deal was found by Cheapflights users on 6/5. 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.
Fri 8/217:35 pm
SEA
- LAX
1 stop4h 56m
United Airlines
Sat 8/291:25 pm
LAX
- SEA
1 stop5h 04m
United Airlines
Deal found 6/5![United Airlines logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 6/6. 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.
Mon 10/53:59 pm
SEA
- LAX
1 stop4h 31m
Alaska Airlines
Tue 10/69:53 am
LAX
- SEA
1 stop6h 24m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$247
This Southwest deal was found by Cheapflights users on 6/9. 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 11/185:45 am
SEA
- LAX
2 stops7h 20m
Southwest
Tue 11/246:30 pm
LAX
- SEA
1 stop5h 35m
Southwest
Deal found 6/9![Southwest logo]()
$222
This United Airlines deal was found by Cheapflights users on 6/5. 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 9/27:35 pm
SEA
- LAX
1 stop4h 56m
United Airlines
Sun 9/611:45 am
LAX
- SEA
1 stop4h 29m
United Airlines
Deal found 6/5![United Airlines logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 6/5. 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 11/147:00 am
SEA
- LAX
Nonstop2h 50m
Alaska Airlines
Sat 11/219:15 pm
LAX
- SEA
Nonstop2h 49m
Alaska Airlines
Deal found 6/5![Alaska Airlines logo]()
$262
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Fri 9/46:52 pm
SEA
- LAX
Nonstop2h 49m
United Airlines
Sun 9/610:55 am
LAX
- SEA
1 stop7h 37m
United Airlines
Deal found 6/9![United Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 6/8. 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 8/63:25 pm
SEA
- LAX
2 stops6h 25m
Southwest
Mon 8/1011:05 am
LAX
- SEA
1 stop4h 45m
Southwest
Deal found 6/8![Southwest logo]()
$263
This Southwest deal was found by Cheapflights users on 6/8. 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 7/284:35 pm
SEA
- LAX
1 stop4h 40m
Southwest
Tue 8/41:25 pm
LAX
- SEA
1 stop7h 50m
Southwest
Deal found 6/8![Southwest logo]()
$267
This United Airlines deal was found by Cheapflights users on 6/6. 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 9/223:30 pm
SEA
- LAX
1 stop4h 57m
United Airlines
Sat 9/261:25 pm
LAX
- SEA
1 stop5h 19m
United Airlines
Deal found 6/6![United Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 6/5. 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 8/261:45 pm
SEA
- LAX
2 stops7h 25m
Southwest
Sun 8/303:05 pm
LAX
- SEA
1 stop5h 00m
Southwest
Deal found 6/5![Southwest logo]()
$272
Last-minute flights from Seattle to Costa MesaDiscover last-minute flight deals from Seattle to Costa Mesa. Data last updated June 10, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Costa Mesa. Data last updated June 10, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 6/6. 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.
Mon 6/157:41 pm
SEA
- LAX
1 stop13h 17m
Frontier
Sat 6/273:25 pm
LAX
- SEA
Nonstop3h 01m
Frontier
Deal found 6/6![Frontier logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 6/7. 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 6/156:03 am
SEA
- LAX
Nonstop2h 44m
Multiple Airlines
Sat 6/273:25 pm
LAX
- SEA
Nonstop3h 01m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$297
This Super.com deal was found by Cheapflights users on 6/5. 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.
Tue 6/1611:03 am
SEA
- LAX
Nonstop2h 58m
Frontier
Thu 7/93:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 6/5![Frontier logo]()
$270
This Frontier deal was found by Cheapflights users on 6/6. 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 6/1611:03 am
SEA
- LAX
Nonstop2h 58m
Frontier
Sat 6/273:25 pm
LAX
- SEA
Nonstop3h 01m
Frontier
Deal found 6/6![Frontier logo]()
$272
This Frontier deal was found by Cheapflights users on 6/9. 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 6/1611:03 am
SEA
- LAX
Nonstop2h 58m
Frontier
Wed 7/83:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 6/9![Frontier logo]()
$287
This CheapOair deal was found by Cheapflights users on 6/6. 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.
Tue 6/1611:03 am
SEA
- LAX
Nonstop2h 58m
Frontier
Wed 6/172:00 pm
LAX
- SEA
2 stops20h 35m
Frontier
Deal found 6/6![Frontier logo]()
$288
This Super.com deal was found by Cheapflights users on 6/9. 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 6/1711:03 am
SEA
- LAX
Nonstop2h 58m
Frontier
Tue 7/143:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 6/9![Frontier logo]()
$274
This Super.com deal was found by Cheapflights users on 6/5. 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 6/2011:03 am
SEA
- LAX
Nonstop2h 58m
Frontier
Tue 6/303:25 pm
LAX
- SEA
Nonstop3h 01m
Frontier
Deal found 6/5![Frontier logo]()
$284
This Super.com deal was found by Cheapflights users on 6/5. 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 6/2011:03 am
SEA
- LAX
Nonstop2h 58m
Frontier
Sat 6/273:25 pm
LAX
- SEA
Nonstop3h 01m
Frontier
Deal found 6/5![Frontier logo]()
$285
This CheapOair deal was found by Cheapflights users on 6/5. 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.
Sat 6/2011:03 am
SEA
- LAX
Nonstop2h 58m
Frontier
Tue 6/233:25 pm
LAX
- SEA
Nonstop3h 01m
Frontier
Deal found 6/5![Frontier logo]()
$293
This Frontier deal was found by Cheapflights users on 6/10. 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.
Sat 6/207:41 pm
SEA
- LAX
1 stop12h 52m
Frontier
Sat 7/253:04 pm
LAX
- SEA
Nonstop2h 47m
Frontier
Deal found 6/10![Frontier logo]()
$294
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 June 10, 2026.
Search for one-way flight options from Seattle to Costa Mesa. Find affordable one-way fares based on user searches. Data last updated June 10, 2026.
This Frontier deal was found by Cheapflights users on 6/7. 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 9/311:03 am
SEA
- LAX
Nonstop2h 58m
Frontier
Deal found 6/7![Frontier logo]()
$84
This iWofly deal was found by Cheapflights users on 6/8. 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.
Sun 9/2711:06 am
SEA
- LAX
Nonstop2h 55m
Frontier
Deal found 6/8![Frontier logo]()
$87
This Super.com deal was found by Cheapflights users on 6/6. 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.
Sun 8/2311:03 am
SEA
- LAX
Nonstop2h 58m
Frontier
Deal found 6/6![Frontier logo]()
$88
This Frontier deal was found by Cheapflights users on 6/5. 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.
Sun 9/1311:06 am
SEA
- LAX
Nonstop2h 55m
Frontier
Deal found 6/5![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2211:06 am
SEA
- LAX
Nonstop2h 55m
Frontier
Deal found 6/9![Frontier logo]()
$91
This Trip.com deal was found by Cheapflights users on 6/8. 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 9/152:15 pm
SEA
- LAX
Nonstop2h 48m
Frontier
Deal found 6/8![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 9/17:41 pm
SEA
- LAX
1 stop13h 17m
Frontier
Deal found 6/9![Frontier logo]()
$94
This hutchgo.com deal was found by Cheapflights users on 6/10. 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 hutchgo.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/162:15 pm
SEA
- LAX
Nonstop2h 48m
Frontier
Deal found 6/10![Frontier logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 8/258:13 pm
SEA
- LAX
1 stop23h 07m
Frontier
Deal found 6/10![Frontier logo]()
$97
This Super.com deal was found by Cheapflights users on 6/8. 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 7/2910:34 am
SEA
- LAX
Nonstop3h 00m
Frontier
Deal found 6/8![Frontier logo]()
$98
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 June 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $128 (Expedia) |
One-way from | $84 (Frontier) |
Popular in | December |
Cheapest in | March |
Average price | $265 |
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 June 10, 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
Wed 10/7
9:20 am-1:30 pm
1 stop4h 10m
Los Angeles
Sat 10/10
1:15 pm-7:45 pm
1 stop6h 30m
$222
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Wed 11/18
5:45 am-1:05 pm
2 stops7h 20m
Los Angeles
Tue 11/24
6:30 pm-12:05 am
1 stop5h 35m
$222
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Fri 8/21
7:35 pm-12:31 am
1 stop4h 56m
Los Angeles
Sat 8/29
1:25 pm-6:29 pm
1 stop5h 04m
$247
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Mon 10/5
3:59 pm-8:30 pm
1 stop4h 31m
Los Angeles
Tue 10/6
9:53 am-4:17 pm
1 stop6h 24m
$247
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Wed 9/2
7:35 pm-12:31 am
1 stop4h 56m
Los Angeles
Sun 9/6
11:45 am-4:14 pm
1 stop4h 29m
$247
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Fri 9/4
6:52 pm-9:41 pm
Nonstop2h 49m
Los Angeles
Sun 9/6
10:55 am-6:32 pm
1 stop7h 37m
$257
Quickest round-trip
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Sat 11/14
7:00 am-9:50 am
Nonstop2h 50m
Los Angeles
Sat 11/21
9:15 pm-12:04 am
Nonstop2h 49m
$262
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Thu 8/6
3:25 pm-9:50 pm
2 stops6h 25m
Los Angeles
Mon 8/10
11:05 am-3:50 pm
1 stop4h 45m
$263
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Tue 7/28
4:35 pm-9:15 pm
1 stop4h 40m
Los Angeles
Tue 8/4
1:25 pm-9:15 pm
1 stop7h 50m
$267
SeattleLos Angeles
SEA - LAX
SEALAX
Seattle/Tacoma Intl
Tue 9/22
3:30 pm-8:27 pm
1 stop4h 57m
Los Angeles
Sat 9/26
1:25 pm-6:44 pm
1 stop5h 19m
$267
Showing 1-10 of 20 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 June 10, 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 8% 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 June 10, 2026.
The most flights from SEA to CM3 are scheduled on a Monday (110 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (45 on average).
How much does it cost to fly round-trip from Seattle to Costa Mesa?
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 June 8, 2026.
Travelers seeking maximum savings on their Seattle to Costa Mesa flight should consider departing on Friday 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.
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 June 10, 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
Food
7.0
Entertainment
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Comfort
7.8
Food
7.0
Entertainment
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Comfort
7.8
Food
7.0
Entertainment
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Comfort
7.8
Food
7.0
Entertainment
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Comfort
7.8
Food
7.0
Entertainment
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Comfort
7.8
Food
7.0
Entertainment
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
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.
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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 June 10, 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 June 10, 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 June 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$44 | Average$207 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$98 | Average$300 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$111 | Average$262 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$130 | Average$245 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$136 | Average$238 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$137 | Average$294 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$147 | Average$273 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$186 | Average$342 | FlexibilityNo cancel fee | On-time71% |