$57+ Cheap flights from Seattle (SEA) to Costa Mesa, CA
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
Oct 13 — Oct 201
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 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 September 13, 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 September 13, 2026.
This Super.com deal was found by Cheapflights users on 9/12. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:00 pm -
Nonstop2h 46m
Wed 10/213:35 pm -
Nonstop3h 10m
Deal found 9/12![Frontier logo]()
$66
This Booking.com deal was found by Cheapflights users on 9/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:00 pm -
Nonstop2h 46m
Fri 10/233:35 pm -
Nonstop3h 10m
Deal found 9/12![Frontier logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Wed 10/148:00 pm -
Nonstop2h 46m
Thu 10/223:35 pm -
Nonstop3h 10m
Deal found 9/11![Frontier logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/138:00 pm -
Nonstop2h 46m
Fri 10/233:35 pm -
Nonstop3h 10m
Deal found 9/11![Frontier logo]()
$115
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sat 10/318:09 pm -
Nonstop2h 50m
Fri 11/69:57 pm -
1 stop13h 02m
Deal found 9/10![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Wed 10/288:09 pm -
Nonstop2h 50m
Sat 10/316:15 am -
1 stop8h 57m
Deal found 9/10![Frontier logo]()
$117
This Frontier deal was found by Cheapflights users on 9/10. 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.
Wed 10/77:25 pm -
Nonstop2h 55m
Fri 10/233:35 pm -
Nonstop3h 10m
Deal found 9/10![Frontier logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/64:27 pm -
1 stop7h 43m
Tue 10/136:05 am -
1 stop9h 07m
Deal found 9/11![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Fri 10/29:45 pm -
1 stop10h 02m
Mon 10/52:50 pm -
1 stop18h 52m
Deal found 9/9![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:00 pm -
Nonstop2h 46m
Sat 10/173:35 pm -
Nonstop3h 10m
Deal found 9/8![Frontier logo]()
$121
This Priceline deal was found by Cheapflights users on 9/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:15 pm -
Nonstop2h 49m
Mon 10/53:35 pm -
Nonstop3h 01m
Deal found 9/10![Frontier logo]()
$122
This Trip.com deal was found by Cheapflights users on 9/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/58:09 pm -
Nonstop2h 50m
Mon 11/99:57 pm -
1 stop13h 02m
Deal found 9/10![Frontier logo]()
$123
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 September 13, 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 September 13, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/7. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/132:01 pm -
Nonstop2h 40m
Sun 11/158:00 am -
Nonstop3h 01m
Deal found 9/7![Alaska Airlines logo]()
$157
This Delta deal was found by Cheapflights users on 9/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/88:16 pm -
Nonstop2h 49m
Sun 11/227:05 am -
Nonstop3h 00m
Deal found 9/7![Delta logo]()
$157
This Southwest deal was found by Cheapflights users on 9/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/29:10 am -
2 stops7h 50m
Fri 11/65:00 pm -
1 stop6h 55m
Deal found 9/7![Southwest logo]()
$182
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 10/36:30 am -
Nonstop3h 04m
Mon 10/57:10 pm -
Nonstop2h 49m
Deal found 9/9![United Airlines logo]()
$248
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/118:15 pm -
Nonstop2h 52m
Sun 12/137:05 am -
Nonstop3h 00m
Deal found 9/10![Delta logo]()
$157
This Southwest deal was found by Cheapflights users on 9/9. 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 10/2111:30 am -
2 stops8h 20m
Sun 10/258:50 am -
1 stop5h 40m
Deal found 9/9![Southwest logo]()
$247
This United Airlines deal was found by Cheapflights users on 9/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/264:39 pm -
Nonstop2h 42m
Tue 12/14:10 pm -
1 stop7h 34m
Deal found 9/12![United Airlines logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/19:50 am -
Nonstop2h 52m
Fri 12/47:55 pm -
1 stop13h 14m
Deal found 9/8![Alaska Airlines logo]()
$262
This Southwest deal was found by Cheapflights users on 9/11. 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.
Sat 10/3112:20 pm -
1 stop4h 35m
Tue 11/32:45 pm -
2 stops7h 30m
Deal found 9/11![Southwest logo]()
$252
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/86:43 pm -
Nonstop2h 49m
Thu 10/1510:57 am -
1 stop7h 47m
Deal found 9/10![United Airlines logo]()
$257
This United Airlines deal was found by Cheapflights users on 9/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/131:16 pm -
1 stop6h 01m
Fri 11/273:05 pm -
1 stop5h 42m
Deal found 9/8![United Airlines logo]()
$267
Last-minute flights from Seattle to Costa MesaDiscover last-minute flight deals from Seattle to Costa Mesa. Data last updated September 13, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Costa Mesa. Data last updated September 13, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Fri 10/29:45 pm -
1 stop10h 02m
Mon 10/52:50 pm -
1 stop18h 52m
Deal found 9/9![Frontier logo]()
$120
This Priceline deal was found by Cheapflights users on 9/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:15 pm -
Nonstop2h 49m
Mon 10/53:35 pm -
Nonstop3h 01m
Deal found 9/10![Frontier logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/64:27 pm -
1 stop7h 43m
Tue 10/136:05 am -
1 stop9h 07m
Deal found 9/11![Frontier logo]()
$119
This Frontier deal was found by Cheapflights users on 9/10. 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.
Wed 10/77:25 pm -
Nonstop2h 55m
Fri 10/233:35 pm -
Nonstop3h 10m
Deal found 9/10![Frontier logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/138:00 pm -
Nonstop2h 46m
Thu 10/223:35 pm -
Nonstop3h 10m
Deal found 9/11![Frontier logo]()
$115
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:00 pm -
Nonstop2h 46m
Sat 10/173:35 pm -
Nonstop3h 10m
Deal found 9/8![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Wed 10/148:00 pm -
Nonstop2h 46m
Thu 10/223:35 pm -
Nonstop3h 10m
Deal found 9/11![Frontier logo]()
$114
This Super.com deal was found by Cheapflights users on 9/12. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:00 pm -
Nonstop2h 46m
Wed 10/213:35 pm -
Nonstop3h 10m
Deal found 9/12![Frontier logo]()
$66
This Booking.com deal was found by Cheapflights users on 9/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:00 pm -
Nonstop2h 46m
Fri 10/233:35 pm -
Nonstop3h 10m
Deal found 9/12![Frontier logo]()
$102
This Trip.com deal was found by Cheapflights users on 9/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/234:27 pm -
1 stop8h 02m
Wed 11/43:41 pm -
Nonstop3h 13m
Deal found 9/9![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Wed 10/288:09 pm -
Nonstop2h 50m
Sat 10/316:15 am -
1 stop8h 57m
Deal found 9/10![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sat 10/318:09 pm -
Nonstop2h 50m
Fri 11/69:57 pm -
1 stop13h 02m
Deal found 9/10![Frontier logo]()
$116
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 September 13, 2026.
Search for one-way flight options from Seattle to Costa Mesa. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Fri 10/29:45 pm -
1 stop22h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$57
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Mon 10/199:16 pm -
1 stop19h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$58
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/64:27 pm -
1 stop7h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$60
This Kissandfly.com deal was found by Cheapflights users on 9/10. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/99:16 pm -
1 stop13h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$61
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Sat 10/244:27 pm -
1 stop8h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$62
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Wed 10/79:45 pm -
1 stop9h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$64
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Fri 11/134:27 pm -
1 stop18h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$65
This FlightHub deal was found by Cheapflights users on 9/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/129:16 pm -
1 stop10h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$66
This Super.com deal was found by Cheapflights users on 9/10. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/178:00 pm -
Nonstop2h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$68
This Priceline deal was found by Cheapflights users on 9/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/188:00 pm -
Nonstop2h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$69
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 September 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $66 (Super.com) |
One-way from | $57 (Kiwi.com) |
Popular in | July |
Cheapest in | March |
Average price | $275 |
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 7,457,451 searches. Data last updated September 13, 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 Seattle/Tacoma Intl - LAX Los Angeles
SEALAX
Seattle/Tacoma Intl
Thu 10/1
5:30 am-10:35 am
1 stop5h 05m
Los Angeles
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$89
SeattleLos Angeles
SEA Seattle/Tacoma Intl - LAX Los Angeles
SEALAX
Seattle/Tacoma Intl
Sun 12/6
7:30 am-2:25 pm
1 stop6h 55m
Los Angeles
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$89
SeattleLos Angeles
SEA Seattle/Tacoma Intl - LAX Los Angeles
SEALAX
Seattle/Tacoma Intl
Fri 10/2
11:35 am-3:50 pm
1 stop4h 15m
Los Angeles
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$89
SeattleLos Angeles
SEA Seattle/Tacoma Intl - LAX Los Angeles
SEALAX
Seattle/Tacoma Intl
Tue 10/27
5:35 am-1:00 pm
2 stops7h 25m
Los Angeles
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$94
SeattleLos Angeles
SEA Seattle/Tacoma Intl - LAX Los Angeles
SEALAX
Seattle/Tacoma Intl
Wed 12/9
4:45 pm-11:26 pm
1 stop6h 41m
Los Angeles
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$102
Quickest round-trip
SeattleLos Angeles
SEA Seattle/Tacoma Intl - LAX Los Angeles
SEALAX
Seattle/Tacoma Intl
Fri 10/9
9:35 pm-12:21 am
Nonstop2h 46m
Los Angeles
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$109
SeattleLos Angeles
SEA Seattle/Tacoma Intl - LAX Los Angeles
SEALAX
Seattle/Tacoma Intl
Mon 10/5
4:35 pm-7:41 pm
Nonstop3h 06m
Los Angeles
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$109
SeattleLos Angeles
SEA Seattle/Tacoma Intl - LAX Los Angeles
SEALAX
Seattle/Tacoma Intl
Sat 12/5
8:00 am-10:52 am
Nonstop2h 52m
Los Angeles
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$109
SeattleLos Angeles
SEA Seattle/Tacoma Intl - LAX Los Angeles
SEALAX
Seattle/Tacoma Intl
Mon 10/12
9:35 pm-12:21 am
Nonstop2h 46m
Los Angeles
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$109
SeattleLos Angeles
SEA Seattle/Tacoma Intl - LAX Los Angeles
SEALAX
Seattle/Tacoma Intl
Tue 10/6
12:16 pm-3:22 pm
Nonstop3h 06m
Los Angeles
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$109
Showing 1-10 of 22 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 September 13, 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 9% 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 September 13, 2026.
The most flights from SEA to CM3 are scheduled on a Friday (108 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (49 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 $193 and $363 in October.The cheapest round-trip price found within the last 5 days was $66 on Frontier (Oct 20-Oct 21).
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 September 5, 2026.
Travelers seeking maximum savings on their Seattle to Costa Mesa flight should consider departing on Monday 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 September 13, 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.
Boarding
8.1
Entertainment
7.0
Crew
8.5
Comfort
7.8
Food
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Entertainment
7.0
Crew
8.5
Comfort
7.8
Food
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Entertainment
7.0
Crew
8.5
Comfort
7.8
Food
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Entertainment
7.0
Crew
8.5
Comfort
7.8
Food
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Entertainment
7.0
Crew
8.5
Comfort
7.8
Food
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Entertainment
7.0
Crew
8.5
Comfort
7.8
Food
7.0
Overall
7.9
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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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 7,457,451 searches. Data last updated September 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$44 | Average$211 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$98 | Average$337 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$108 | Average$294 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$130 | Average$293 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$136 | Average$238 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$139 | Average$301 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$148 | Average$311 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$224 | Average$365 | FlexibilityNo cancel fee | On-time71% |