$204+ Cheap flights from Seattle (SEA) to Costa Rica
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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
Oct 14 — Oct 211
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
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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 September 14, 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 September 14, 2026.
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/17:05 pm -
2 stops17h 15m
Sun 12/63:10 pm -
2 stops29h 12m
Deal found 9/9![Air Canada logo]()
$543
This eDestinos deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2611:15 pm -
1 stop32h 15m
Sat 10/37:45 am -
1 stop15h 14m
Deal found 9/13![Multiple Airlines logo]()
$549
This Avianca 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/92:02 pm -
2 stops17h 28m
Sun 10/184:35 pm -
2 stops19h 00m
Deal found 9/11![Multiple Airlines logo]()
$562
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/317:05 pm -
2 stops18h 05m
Sun 11/83:10 pm -
1 stop31h 49m
Deal found 9/10![Air Canada logo]()
$566
This Avianca deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/239:27 am -
2 stops22h 03m
Thu 10/17:45 am -
1 stop15h 09m
Deal found 9/13![Multiple Airlines logo]()
$567
This Avianca deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/112:02 pm -
2 stops17h 28m
Sun 10/184:35 pm -
2 stops19h 00m
Deal found 9/13![Multiple Airlines logo]()
$571
This Avianca 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/279:27 am -
2 stops22h 03m
Thu 10/17:45 am -
1 stop15h 09m
Deal found 9/11![Multiple Airlines logo]()
$576
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:55 am -
1 stop28h 15m
Fri 10/302:10 pm -
2 stops29h 12m
Deal found 9/10![Air Canada logo]()
$584
This Avianca 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/231:30 pm -
2 stops18h 00m
Mon 9/287:45 am -
1 stop15h 09m
Deal found 9/11![Multiple Airlines logo]()
$584
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 9/297:35 pm -
2 stops15h 50m
Fri 10/167:15 am -
1 stop27h 25m
Deal found 9/9![WestJet logo]()
$585
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.
Sun 10/256:30 am -
2 stops12h 10m
Fri 10/301:30 pm -
2 stops21h 30m
Deal found 9/11![Southwest logo]()
$586
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/238:40 am -
2 stops27h 40m
Wed 12/93:10 pm -
1 stop31h 49m
Deal found 9/9![Air Canada logo]()
$589
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 September 14, 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 September 14, 2026.
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 10/215:35 am -
2 stops13h 05m
Tue 10/271:00 pm -
2 stops11h 55m
Deal found 9/9![Southwest logo]()
$597
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/911:45 pm -
1 stop20h 30m
Mon 11/162:37 pm -
1 stop21h 28m
Deal found 9/12![Delta logo]()
$618
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.
Wed 11/1111:59 pm -
1 stop9h 26m
Wed 11/189:40 am -
1 stop13h 07m
Deal found 9/12![United Airlines logo]()
$618
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1711:10 pm -
2 stops17h 15m
Wed 2/2410:00 am -
2 stops25h 09m
Deal found 9/9![Alaska Airlines logo]()
$628
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.
Sat 10/176:15 am -
2 stops12h 25m
Sat 10/249:00 am -
2 stops13h 45m
Deal found 9/9![Southwest logo]()
$614
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:00 am -
1 stop14h 15m
Wed 11/252:37 pm -
1 stop11h 20m
Deal found 9/14![Delta logo]()
$618
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.
Wed 10/217:25 pm -
1 stop10h 50m
Wed 10/288:40 am -
1 stop13h 07m
Deal found 9/12![United Airlines logo]()
$618
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.
Mon 12/711:59 pm -
1 stop11h 23m
Fri 12/118:45 am -
1 stop12h 47m
Deal found 9/12![United Airlines logo]()
$618
This Alaska Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/202:10 pm -
1 stop15h 35m
Mon 3/17:35 pm -
1 stop15h 16m
Deal found 9/13![Alaska Airlines logo]()
$735
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.
Wed 2/177:32 pm -
2 stops15h 38m
Wed 2/2412:50 pm -
1 stop10h 22m
Deal found 9/9![United Airlines logo]()
$626
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/83:55 pm -
1 stop19h 17m
Wed 11/182:37 pm -
1 stop21h 28m
Deal found 9/12![Delta logo]()
$696
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/223:55 pm -
1 stop19h 05m
Sat 10/241:25 pm -
1 stop21h 38m
Deal found 9/9![Delta logo]()
$706
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.
Tue 2/167:32 pm -
2 stops15h 38m
Wed 3/312:50 pm -
1 stop10h 22m
Deal found 9/12![United Airlines logo]()
$646
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/88:15 am -
1 stop10h 16m
Sun 1/178:33 am -
1 stop11h 23m
Deal found 9/11![Alaska Airlines logo]()
$799
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/85:05 am -
1 stop9h 05m
Mon 11/168:45 am -
1 stop16h 06m
Deal found 9/11![United Airlines logo]()
$671
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/265:07 am -
1 stop9h 01m
Sun 1/318:35 am -
1 stop16h 03m
Deal found 9/13![United Airlines logo]()
$671
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:20 pm -
1 stop12h 55m
Mon 9/288:45 am -
1 stop10h 59m
Deal found 9/13![United Airlines logo]()
$690
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.
Mon 10/267:35 pm -
1 stop10h 57m
Wed 10/287:45 am -
2 stops14h 34m
Deal found 9/9![United Airlines logo]()
$723
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1311:59 pm -
1 stop9h 26m
Wed 11/258:45 am -
2 stops16h 33m
Deal found 9/14![United Airlines logo]()
$743
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/142:30 pm -
1 stop20h 25m
Fri 1/2212:50 pm -
1 stop10h 22m
Deal found 9/11![United Airlines logo]()
$791
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 1/25:00 am -
1 stop11h 34m
Sun 1/172:20 pm -
2 stops21h 39m
Deal found 9/9![United Airlines logo]()
$801
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.
Sat 12/123:28 pm -
2 stops25h 09m
Sun 12/208:45 am -
2 stops17h 13m
Deal found 9/12![United Airlines logo]()
$821
Last-minute flights from Seattle to Costa RicaDiscover last-minute flight deals from Seattle to Costa Rica. Data last updated September 14, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Costa Rica. Data last updated September 14, 2026 and is based on user searches.
This Avianca deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/239:27 am -
2 stops22h 03m
Thu 10/17:45 am -
1 stop15h 09m
Deal found 9/13![Multiple Airlines logo]()
$567
This Avianca 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/231:30 pm -
2 stops18h 00m
Mon 9/287:45 am -
1 stop15h 09m
Deal found 9/11![Multiple Airlines logo]()
$584
This eDestinos deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2611:15 pm -
1 stop32h 15m
Sat 10/37:45 am -
1 stop15h 14m
Deal found 9/13![Multiple Airlines logo]()
$549
This Avianca 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/279:27 am -
2 stops22h 03m
Thu 10/17:45 am -
1 stop15h 09m
Deal found 9/11![Multiple Airlines logo]()
$576
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 9/297:35 pm -
2 stops15h 50m
Fri 10/167:15 am -
1 stop27h 25m
Deal found 9/9![WestJet logo]()
$585
This Avianca 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/92:02 pm -
2 stops17h 28m
Sun 10/184:35 pm -
2 stops19h 00m
Deal found 9/11![Multiple Airlines logo]()
$562
This Avianca deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/112:02 pm -
2 stops17h 28m
Sun 10/184:35 pm -
2 stops19h 00m
Deal found 9/13![Multiple Airlines logo]()
$571
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/193:55 pm -
1 stop19h 05m
Sat 10/311:25 pm -
1 stop11h 27m
Deal found 9/9![Delta logo]()
$589
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.
Wed 10/215:35 am -
2 stops13h 05m
Wed 10/281:00 pm -
2 stops11h 55m
Deal found 9/11![Southwest logo]()
$592
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:55 am -
1 stop28h 15m
Fri 10/302:10 pm -
2 stops29h 12m
Deal found 9/10![Air Canada logo]()
$584
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.
Sun 10/256:30 am -
2 stops12h 10m
Fri 10/301:30 pm -
2 stops21h 30m
Deal found 9/11![Southwest logo]()
$586
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/317:05 pm -
2 stops18h 05m
Sun 11/83:10 pm -
1 stop31h 49m
Deal found 9/10![Air Canada logo]()
$566
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 September 14, 2026.
Search for one-way flight options from Seattle to Costa Rica. Find affordable one-way fares based on user searches. Data last updated September 14, 2026.
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/511:34 pm -
2 stops12h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![American Airlines logo]()
$204
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.
Tue 10/610:57 am -
3 stops48h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$260
This eDestinos deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/142:02 pm -
1 stop17h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Multiple Airlines logo]()
$265
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 11/24:27 pm -
3 stops38h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$271
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:41 pm -
1 stop19h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![American Airlines logo]()
$273
This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:00 pm -
3 stops39h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Multiple Airlines logo]()
$274
This Avianca deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/92:43 pm -
2 stops15h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Multiple Airlines logo]()
$275
This BusinessClass 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/235:49 pm -
1 stop17h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![GOL logo]()
$276
This Avianca deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/92:02 pm -
2 stops17h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Multiple Airlines logo]()
$277
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.
Sat 10/246:15 am -
2 stops12h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Southwest logo]()
$278
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2310:10 am -
2 stops26h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Air Canada logo]()
$279
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.
Sun 10/187:25 pm -
1 stop10h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![United Airlines logo]()
$279
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 September 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $543 (Air Canada) |
One-way from | $204 (American Airlines) |
Popular in | March |
Cheapest in | October |
Average price | $628 |
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 7,457,451 searches. Data last updated September 14, 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
Sat 12/5
11:34 pm-2:17 pm
2 stops12h 43m
Liberia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$204
SeattleLiberia
SEA Seattle/Tacoma Intl - LIR Liberia
SEALIR
Seattle/Tacoma Intl
Sat 12/5
7:45 am-2:10 pm
1 stop28h 25m
Liberia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$279
SeattleSan José
SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl
SEASJO
Seattle/Tacoma Intl
Sat 12/5
11:59 pm-10:17 pm
1 stop20h 18m
San José Juan Santamaria Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$279
SeattleSan José
SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl
SEASJO
Seattle/Tacoma Intl
Sun 10/18
7:25 pm-7:15 am
1 stop10h 50m
San José Juan Santamaria Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$279
SeattleLiberia
SEA Seattle/Tacoma Intl - LIR Liberia
SEALIR
Seattle/Tacoma Intl
Sun 11/22
9:53 pm-2:20 pm
2 stops38h 27m
Liberia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$281
SeattleSan José
SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl
SEASJO
Seattle/Tacoma Intl
Thu 10/29
6:50 pm-12:35 pm
2 stops16h 45m
San José Juan Santamaria Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$288
SeattleSan José
SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl
SEASJO
Seattle/Tacoma Intl
Mon 11/2
11:59 pm-1:22 pm
1 stop11h 23m
San José Juan Santamaria Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$289
SeattleSan José
SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl
SEASJO
Seattle/Tacoma Intl
Thu 10/29
11:59 pm-7:39 pm
1 stop18h 40m
San José Juan Santamaria Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$289
Quickest round-trip
SeattleSan José
SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl
SEASJO
Seattle/Tacoma Intl
Fri 11/13
11:59 pm-11:25 am
1 stop9h 26m
San José Juan Santamaria Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$289
SeattleSan José
SEA Seattle/Tacoma Intl - SJO San José Juan Santamaria Intl
SEASJO
Seattle/Tacoma Intl
Thu 10/22
7:25 pm-7:15 am
1 stop10h 50m
San José Juan Santamaria Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$289
Showing 1-10 of 42 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-LIR
SEA-SJO
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-LIR
SEA-SJO
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 $557). Flying from Seattle to Costa Rica in April is currently the most expensive (average of $814). 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 74 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 September 14, 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.
Food
7.0
Entertainment
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Food
7.0
Entertainment
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Food
7.0
Entertainment
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Food
7.0
Entertainment
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Food
7.0
Entertainment
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Food
7.0
Entertainment
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
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 September 14, 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 7,457,451 searches. Data last updated September 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$316 | Average$685 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$357 | Average$704 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$362 | Average$682 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$369 | Average$769 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$384 | Average$740 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$390 | Average$692 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$516 | Average$703 | FlexibilityNo cancel fee | On-time63% |