$239+ Cheap flights from Seattle (SEA) to Costa Rica
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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
Sep 9 — Sep 161
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Costa Rica 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.Cheap flight deals from Seattle to Costa Rica
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Cheapest flights from Seattle to Costa RicaExplore the most affordable flight options available from Seattle to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 10, 2026.
Explore the most affordable flight options available from Seattle to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 10, 2026.
This American Airlines deal was found by Cheapflights users on 8/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1212:25 am -
2 stops11h 53m
Tue 10/272:44 pm -
2 stops19h 47m
Deal found 8/10![American Airlines logo]()
$445
This Air Canada deal was found by Cheapflights users on 8/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2410:30 am -
2 stops25h 40m
Sat 10/312:20 pm -
2 stops30h 02m
Deal found 8/10![Air Canada logo]()
$479
This Air Canada deal was found by Cheapflights users on 8/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/210:10 am -
2 stops26h 10m
Tue 11/103:20 pm -
2 stops25h 17m
Deal found 8/8![Air Canada logo]()
$526
This oojo deal was found by Cheapflights users on 8/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:58 pm -
2 stops15h 47m
Thu 10/15:45 am -
2 stops13h 48m
Deal found 8/7![Multiple Airlines logo]()
$526
This oojo deal was found by Cheapflights users on 8/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/68:20 am -
2 stops13h 55m
Mon 10/1912:40 pm -
3 stops21h 15m
Deal found 8/10![Multiple Airlines logo]()
$527
This oojo deal was found by Cheapflights users on 8/5. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:10 pm -
2 stops13h 35m
Sun 9/203:10 pm -
2 stops18h 42m
Deal found 8/5![Multiple Airlines logo]()
$529
This Air Canada deal was found by Cheapflights users on 8/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:45 am -
1 stop28h 25m
Thu 11/53:20 pm -
2 stops25h 17m
Deal found 8/9![Air Canada logo]()
$531
This Avianca deal was found by Cheapflights users on 8/10. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/296:49 am -
2 stops15h 26m
Sat 9/55:45 am -
2 stops15h 54m
Deal found 8/10![Multiple Airlines logo]()
$532
This Avianca deal was found by Cheapflights users on 8/8. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/19:35 am -
2 stops12h 40m
Sun 9/65:05 am -
2 stops13h 18m
Deal found 8/8![Multiple Airlines logo]()
$534
This Avianca deal was found by Cheapflights users on 8/10. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1610:07 am -
2 stops12h 08m
Thu 10/225:45 am -
2 stops15h 05m
Deal found 8/10![Multiple Airlines logo]()
$535
This Air Canada deal was found by Cheapflights users on 8/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3110:10 am -
2 stops27h 00m
Sun 11/83:10 pm -
2 stops29h 12m
Deal found 8/10![Air Canada logo]()
$536
This oojo deal was found by Cheapflights users on 8/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:10 pm -
2 stops27h 05m
Fri 9/113:10 pm -
2 stops20h 46m
Deal found 8/10![Multiple Airlines logo]()
$541
Best flights from Seattle to Costa RicaDiscover carefully curated flight deals from Seattle to Costa Rica that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 10, 2026.
Discover carefully curated flight deals from Seattle to Costa Rica that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 10, 2026.
This Air Canada deal was found by Cheapflights users on 8/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:45 am -
1 stop28h 25m
Mon 11/163:10 pm -
2 stops25h 27m
Deal found 8/10![Air Canada logo]()
$588
This United Airlines deal was found by Cheapflights users on 8/5. 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 9/93:30 pm -
1 stop14h 45m
Sat 9/198:45 am -
1 stop10h 44m
Deal found 8/5![United Airlines logo]()
$598
This Delta deal was found by Cheapflights users on 8/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/169:20 pm -
1 stop13h 25m
Sat 1/238:25 am -
1 stop14h 06m
Deal found 8/9![Delta logo]()
$639
This Alaska Airlines deal was found by Cheapflights users on 8/5. 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 1/167:55 pm -
1 stop20h 30m
Wed 1/2010:00 am -
2 stops15h 00m
Deal found 8/5![Alaska Airlines logo]()
$656
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Wed 12/211:59 pm -
1 stop11h 16m
Fri 12/112:20 pm -
1 stop10h 18m
Deal found 8/6![United Airlines logo]()
$598
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Wed 11/411:59 pm -
1 stop9h 26m
Wed 11/188:45 am -
1 stop12h 32m
Deal found 8/8![United Airlines logo]()
$598
This Alaska Airlines deal was found by Cheapflights users on 8/5. 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.
Tue 11/39:07 pm -
1 stop19h 48m
Tue 3/210:00 am -
1 stop12h 05m
Deal found 8/5![Alaska Airlines logo]()
$671
This Delta deal was found by Cheapflights users on 8/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/203:55 pm -
1 stop19h 05m
Mon 10/261:25 pm -
1 stop21h 38m
Deal found 8/8![Delta logo]()
$680
This Alaska Airlines deal was found by Cheapflights users on 8/5. 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.
Wed 11/114:20 pm -
1 stop28h 48m
Sun 11/151:43 am -
1 stop11h 09m
Deal found 8/5![Alaska Airlines logo]()
$688
This Delta deal was found by Cheapflights users on 8/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1210:45 pm -
1 stop12h 00m
Tue 12/221:50 pm -
1 stop12h 05m
Deal found 8/8![Delta logo]()
$736
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Sat 9/511:59 pm -
1 stop11h 11m
Sat 9/121:20 pm -
2 stops24h 00m
Deal found 8/6![United Airlines logo]()
$701
This Alaska Airlines deal was found by Cheapflights users on 8/6. 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.
Sat 1/3011:10 pm -
2 stops17h 15m
Sat 2/610:00 am -
2 stops15h 00m
Deal found 8/6![Alaska Airlines logo]()
$715
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Sat 1/910:40 pm -
1 stop11h 35m
Tue 1/191:15 am -
2 stops15h 03m
Deal found 8/8![United Airlines logo]()
$718
This Alaska Airlines deal was found by Cheapflights users on 8/5. 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.
Mon 11/29:07 pm -
1 stop19h 48m
Mon 3/110:00 am -
1 stop12h 05m
Deal found 8/5![Alaska Airlines logo]()
$751
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Mon 1/1110:45 am -
1 stop19h 47m
Fri 1/229:40 am -
1 stop16h 53m
Deal found 8/6![United Airlines logo]()
$718
This Alaska Airlines deal was found by Cheapflights users on 8/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/238:15 am -
Nonstop6h 58m
Sat 1/306:23 pm -
1 stop16h 46m
Deal found 8/9![Alaska Airlines logo]()
$752
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Tue 1/127:03 am -
1 stop9h 13m
Thu 1/219:40 am -
1 stop15h 41m
Deal found 8/5![United Airlines logo]()
$718
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/102:56 pm -
1 stop27h 56m
Sun 9/208:32 am -
1 stop12h 07m
Deal found 8/10![Alaska Airlines logo]()
$760
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Thu 2/410:40 pm -
1 stop11h 35m
Tue 2/239:40 am -
1 stop16h 53m
Deal found 8/8![United Airlines logo]()
$718
This Alaska Airlines deal was found by Cheapflights users on 8/6. 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.
Fri 1/227:55 pm -
1 stop20h 30m
Sun 1/318:30 am -
Nonstop7h 50m
Deal found 8/6![Alaska Airlines logo]()
$766
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Mon 1/116:51 pm -
2 stops16h 19m
Sat 1/164:53 pm -
2 stops19h 28m
Deal found 8/5![United Airlines logo]()
$760
Last-minute flights from Seattle to Costa RicaDiscover last-minute flight deals from Seattle to Costa Rica. Data last updated August 10, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Costa Rica. Data last updated August 10, 2026 and is based on user searches.
This Avianca deal was found by Cheapflights users on 8/7. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:35 am -
2 stops12h 40m
Tue 8/255:45 am -
2 stops14h 54m
Deal found 8/7![Multiple Airlines logo]()
$535
This Avianca deal was found by Cheapflights users on 8/10. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/296:49 am -
2 stops15h 26m
Sat 9/55:45 am -
2 stops15h 54m
Deal found 8/10![Multiple Airlines logo]()
$532
This oojo deal was found by Cheapflights users on 8/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:10 pm -
2 stops13h 35m
Wed 9/93:10 pm -
2 stops18h 42m
Deal found 8/10![Multiple Airlines logo]()
$545
This Avianca deal was found by Cheapflights users on 8/8. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/19:35 am -
2 stops12h 40m
Sun 9/65:05 am -
2 stops13h 18m
Deal found 8/8![Multiple Airlines logo]()
$534
This oojo deal was found by Cheapflights users on 8/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/19:35 am -
2 stops12h 40m
Mon 9/1412:40 pm -
3 stops21h 12m
Deal found 8/7![Multiple Airlines logo]()
$543
This oojo deal was found by Cheapflights users on 8/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/45:59 pm -
2 stops28h 16m
Wed 9/93:10 pm -
2 stops18h 42m
Deal found 8/10![Multiple Airlines logo]()
$541
This oojo deal was found by Cheapflights users on 8/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:49 am -
2 stops15h 26m
Sat 9/1212:40 pm -
3 stops22h 36m
Deal found 8/6![Multiple Airlines logo]()
$527
This oojo deal was found by Cheapflights users on 8/5. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:10 pm -
2 stops13h 35m
Sun 9/203:10 pm -
2 stops18h 42m
Deal found 8/5![Multiple Airlines logo]()
$529
This oojo deal was found by Cheapflights users on 8/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:10 pm -
2 stops15h 20m
Sun 9/1312:40 pm -
3 stops21h 12m
Deal found 8/9![Multiple Airlines logo]()
$546
This American Airlines deal was found by Cheapflights users on 8/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/208:50 pm -
1 stop15h 28m
Fri 9/252:47 pm -
2 stops20h 22m
Deal found 8/7![American Airlines logo]()
$571
This oojo deal was found by Cheapflights users on 8/5. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:58 pm -
2 stops15h 47m
Thu 10/15:45 am -
2 stops13h 48m
Deal found 8/5![Multiple Airlines logo]()
$526
This American Airlines deal was found by Cheapflights users on 8/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:50 pm -
1 stop15h 28m
Thu 10/12:18 pm -
1 stop20h 05m
Deal found 8/9![American Airlines logo]()
$561
One-way flights from Seattle to Costa RicaSearch for one-way flight options from Seattle to Costa Rica. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
Search for one-way flight options from Seattle to Costa Rica. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
This Southwest deal was found by Cheapflights users on 8/7. 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 9/285:30 am -
2 stops12h 15m
Deal found 8/7![Southwest logo]()
$239
This Avianca deal was found by Cheapflights users on 8/6. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/169:57 am -
2 stops12h 18m
Deal found 8/6![Multiple Airlines logo]()
$255
This Avianca deal was found by Cheapflights users on 8/9. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1210:07 am -
2 stops12h 08m
Deal found 8/9![Multiple Airlines logo]()
$256
This Avianca deal was found by Cheapflights users on 8/8. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:49 am -
2 stops15h 26m
Deal found 8/8![Multiple Airlines logo]()
$258
This oojo deal was found by Cheapflights users on 8/5. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/204:59 pm -
2 stops17h 31m
Deal found 8/5![Multiple Airlines logo]()
$261
This Southwest deal was found by Cheapflights users on 8/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/276:45 pm -
2 stops17h 00m
Deal found 8/6![Southwest logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Wed 11/1111:06 am -
2 stops36h 19m
Deal found 8/6![Multiple Airlines logo]()
$269
This FlightHub deal was found by Cheapflights users on 8/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/129:57 am -
2 stops12h 18m
Deal found 8/7![Multiple Airlines logo]()
$273
This Air Canada deal was found by Cheapflights users on 8/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/710:10 am -
2 stops26h 10m
Deal found 8/8![Air Canada logo]()
$276
This Air Canada deal was found by Cheapflights users on 8/7. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/103:15 pm -
2 stops20h 55m
Deal found 8/7![Air Canada logo]()
$281
This Air Canada deal was found by Cheapflights users on 8/7. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/157:45 am -
2 stops28h 35m
Deal found 8/7![Air Canada logo]()
$284
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Wed 9/95:20 pm -
2 stops17h 50m
Deal found 8/8![United Airlines logo]()
$328
Find flight deals from Seattle to Costa Rica
Keep the following information in mind while searching for Seattle to Costa Rica flight deals. Data was last updated August 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $445 (American Airlines) |
One-way from | $239 (Southwest) |
Popular in | April |
Cheapest in | October |
Average price | $678 |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Costa Rica 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 August 10, 2026.
Use the filters below to find and compare flights from Seattle to Costa Rica that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleLiberia
SEA Seattle/Tacoma Intl - LIR Liberia
SEALIR
Seattle/Tacoma Intl
Sun 11/8
7:45 am-2:10 pm
1 stop28h 25m
Liberia
Mon 11/16
3:10 pm-2:37 pm
2 stops25h 27m
$588
SeattleSan José
SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl
SEASJO
Seattle/Tacoma Intl
Wed 9/9
3:30 pm-7:15 am
1 stop14h 45m
San José Juan Santamaria Intl
Sat 9/19
8:45 am-6:29 pm
1 stop10h 44m
$598
Quickest round-trip
SeattleSan José
SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl
SEASJO
Seattle/Tacoma Intl
Wed 12/2
11:59 pm-1:15 pm
1 stop11h 16m
San José Juan Santamaria Intl
Fri 12/11
2:20 pm-10:38 pm
1 stop10h 18m
$598
SeattleSan José
SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl
SEASJO
Seattle/Tacoma Intl
Wed 11/4
11:59 pm-11:25 am
1 stop9h 26m
San José Juan Santamaria Intl
Wed 11/18
8:45 am-7:17 pm
1 stop12h 32m
$598
SeattleSan José
SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl
SEASJO
Seattle/Tacoma Intl
Sat 1/16
9:20 pm-12:45 pm
1 stop13h 25m
San José Juan Santamaria Intl
Sat 1/23
8:25 am-8:31 pm
1 stop14h 06m
$639
SeattleLiberia
SEA Seattle/Tacoma Intl - LIR Liberia
SEALIR
Seattle/Tacoma Intl
Sat 1/16
7:55 pm-6:25 pm
1 stop20h 30m
Liberia
Wed 1/20
10:00 am-11:00 pm
2 stops15h 00m
$656
SeattleLiberia
SEA Seattle/Tacoma Intl - LIR Liberia
SEALIR
Seattle/Tacoma Intl
Tue 11/3
9:07 pm-6:55 pm
1 stop19h 48m
Liberia
Tue 3/2
10:00 am-8:05 pm
1 stop12h 05m
$671
SeattleSan José
SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl
SEASJO
Seattle/Tacoma Intl
Tue 10/20
3:55 pm-12:00 pm
1 stop19h 05m
San José Juan Santamaria Intl
Mon 10/26
1:25 pm-10:03 am
1 stop21h 38m
$680
SeattleSan José
SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl
SEASJO
Seattle/Tacoma Intl
Wed 11/11
4:20 pm-11:08 pm
1 stop28h 48m
San José Juan Santamaria Intl
Sun 11/15
1:43 am-10:52 am
1 stop11h 09m
$688
SeattleLiberia
SEA Seattle/Tacoma Intl - LIR Liberia
SEALIR
Seattle/Tacoma Intl
Sat 9/5
11:59 pm-12:10 pm
1 stop11h 11m
Liberia
Sat 9/12
1:20 pm-12:20 pm
2 stops24h 00m
$701
Showing 1-10 of 40 resultsSorted by cheapest first
Best time to book a flight from Seattle to Costa Rica
Have a flexible travel schedule? Discover the best time to fly to Costa Rica from Seattle with our price prediction graph.
SEA-SJO
SEA-LIR
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 Rica
SEA-CR0
SEA-SJO
SEA-LIR
What is the cheapest month to book a flight from Seattle to Costa Rica?
Currently, January is the cheapest month in which you can book a flight from Seattle to Costa Rica (average of $552). Flying from Seattle to Costa Rica in April is currently the most expensive (average of $819). 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.
How far ahead should I book a flight from Seattle to Costa Rica?
The best time to book flights from Seattle to Costa Rica is 38 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Reviews of airlines servicing Costa Rica
Get insights into the airlines that provide service to Costa Rica. 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 Rica. Reviews last updated August 10, 2026.
Get a feel of what it's like to fly with Alaska Airlines,Delta, andUnited Airlines from Seattle to Costa Rica by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Entertainment
7.0
Overall
7.9
Comfort
7.8
Food
7.0
Crew
8.5
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Boarding
8.1
Entertainment
7.0
Overall
7.9
Comfort
7.8
Food
7.0
Crew
8.5
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Boarding
8.1
Entertainment
7.0
Overall
7.9
Comfort
7.8
Food
7.0
Crew
8.5
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Boarding
8.1
Entertainment
7.0
Overall
7.9
Comfort
7.8
Food
7.0
Crew
8.5
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Boarding
8.1
Entertainment
7.0
Overall
7.9
Comfort
7.8
Food
7.0
Crew
8.5
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Boarding
8.1
Entertainment
7.0
Overall
7.9
Comfort
7.8
Food
7.0
Crew
8.5
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Related info for your journey
Find useful and relevant information for your journey from Seattle to Costa Rica. 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 Rica
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Complete your trip
Complete your trip to Costa Rica by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from Seattle to Costa Rica, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Costa Rica flights
Browse other Seattle and Costa Rica flight options. Last updated on August 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 7 airlines flying from Seattle to Costa Rica
Discover the top 7 airlines that operate flights from Seattle to Costa Rica. 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 August 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$316 | Average$670 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$345 | Average$673 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$346 | Average$686 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$362 | Average$682 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$381 | Average$693 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$384 | Average$740 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$516 | Average$703 | FlexibilityNo cancel fee | On-time63% |