$219+ 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
Jul 29 — Aug 51
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Costa Rica with Cheapflights
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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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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 June 29, 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 June 29, 2026.
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Wed 9/235:34 pm
SEA
- SJO
1 stop19h 23m
American Airlines
Thu 10/11:00 pm
SJO
- SEA
1 stop11h 58m
American Airlines
Deal found 6/24![American Airlines logo]()
$480
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Wed 10/212:05 pm
SEA
- SJO
1 stop22h 53m
American Airlines
Fri 10/3012:57 pm
SJO
- SEA
1 stop10h 23m
American Airlines
Deal found 6/24![American Airlines logo]()
$489
This American Airlines deal was found by Cheapflights users on 6/25. 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.
Wed 10/1411:30 pm
SEA
- SJO
1 stop13h 28m
American Airlines
Sun 10/252:45 pm
SJO
- SEA
2 stops21h 23m
American Airlines
Deal found 6/25![American Airlines logo]()
$490
This American Airlines deal was found by Cheapflights users on 6/26. 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.
Tue 9/18:21 pm
SEA
- SJO
1 stop14h 42m
American Airlines
Mon 9/141:00 pm
SJO
- SEA
1 stop26h 52m
American Airlines
Deal found 6/26![American Airlines logo]()
$492
This American Airlines deal was found by Cheapflights users on 6/28. 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.
Tue 9/1511:57 pm
SEA
- SJO
2 stops19h 10m
American Airlines
Sat 9/261:00 pm
SJO
- SEA
1 stop21h 25m
American Airlines
Deal found 6/28![American Airlines logo]()
$496
This Booking.com deal was found by Cheapflights users on 6/26. 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.
Fri 10/26:51 pm
SEA
- SJO
2 stops47h 39m
Alaska Airlines
Mon 10/57:00 am
SJO
- SEA
2 stops16h 25m
Alaska Airlines
Deal found 6/26![Alaska Airlines logo]()
$499
This American Airlines deal was found by Cheapflights users on 6/26. 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 8/275:31 pm
SEA
- SJO
1 stop19h 21m
American Airlines
Mon 9/76:00 am
SJO
- SEA
1 stop19h 20m
American Airlines
Deal found 6/26![American Airlines logo]()
$505
This Southwest deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:40 am
SEA
- SJO
2 stops11h 00m
Southwest
Sat 9/269:30 am
SJO
- SEA
2 stops14h 25m
Southwest
Deal found 6/27![Southwest logo]()
$517
This Southwest deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/228:55 am
SEA
- SJO
1 stop8h 45m
Southwest
Tue 9/299:00 am
SJO
- SEA
2 stops15h 35m
Southwest
Deal found 6/24![Southwest logo]()
$522
This Avianca deal was found by Cheapflights users on 6/25. 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.
Thu 8/610:03 am
SEA
- SJO
2 stops12h 12m
Multiple Airlines
Tue 8/185:45 am
SJO
- SEA
2 stops13h 25m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$525
This Avianca deal was found by Cheapflights users on 6/24. 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 10/2110:05 am
SEA
- SJO
2 stops12h 10m
Multiple Airlines
Fri 10/305:45 am
SJO
- SEA
2 stops16h 08m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$526
This American Airlines deal was found by Cheapflights users on 6/27. 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 12/1210:08 pm
SEA
- LIR
1 stop12h 17m
American Airlines
Wed 12/161:25 pm
LIR
- SEA
1 stop11h 51m
American Airlines
Deal found 6/27![American Airlines logo]()
$530
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 June 29, 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 June 29, 2026.
This United Airlines deal was found by Cheapflights users on 6/26. 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 8/177:35 pm
SEA
- SJO
2 stops15h 46m
United Airlines
Mon 8/248:45 am
SJO
- SEA
1 stop10h 44m
United Airlines
Deal found 6/26![United Airlines logo]()
$558
This Delta deal was found by Cheapflights users on 6/27. 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 8/253:50 pm
SEA
- LIR
1 stop19h 10m
Delta
Mon 8/311:25 pm
LIR
- SEA
1 stop11h 32m
Delta
Deal found 6/27![Delta logo]()
$662
This Southwest deal was found by Cheapflights users on 6/28. 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.
Fri 9/117:25 pm
SEA
- LIR
2 stops16h 20m
Southwest
Sun 9/202:10 pm
LIR
- SEA
1 stop10h 25m
Southwest
Deal found 6/28![Southwest logo]()
$683
This Alaska Airlines deal was found by Cheapflights users on 6/25. 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 11/24:20 pm
SEA
- SJO
1 stop28h 48m
Alaska Airlines
Tue 11/31:43 am
SJO
- SEA
1 stop12h 57m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$683
This United Airlines deal was found by Cheapflights users on 6/27. 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 9/25:00 am
SEA
- SJO
2 stops13h 37m
United Airlines
Sat 9/128:45 am
SJO
- SEA
1 stop12h 58m
United Airlines
Deal found 6/27![United Airlines logo]()
$609
This Alaska Airlines deal was found by Cheapflights users on 6/26. 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 8/1210:03 am
SEA
- SJO
1 stop12h 43m
Alaska Airlines
Fri 8/141:06 am
SJO
- SEA
1 stop15h 27m
Alaska Airlines
Deal found 6/26![Alaska Airlines logo]()
$739
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2511:13 pm
SEA
- LIR
1 stop11h 40m
United Airlines
Sun 10/251:20 pm
LIR
- SEA
1 stop10h 35m
United Airlines
Deal found 6/28![United Airlines logo]()
$676
This Delta deal was found by Cheapflights users on 6/24. 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 8/213:50 pm
SEA
- SJO
1 stop18h 59m
Delta
Tue 8/251:14 pm
SJO
- SEA
1 stop11h 43m
Delta
Deal found 6/24![Delta logo]()
$780
This Alaska Airlines deal was found by Cheapflights users on 6/25. 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 8/85:59 pm
SEA
- SJO
2 stops28h 47m
Alaska Airlines
Thu 8/131:06 am
SJO
- SEA
1 stop12h 42m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$751
This United Airlines deal was found by Cheapflights users on 6/25. 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 9/193:30 pm
SEA
- SJO
2 stops19h 51m
United Airlines
Sat 9/267:55 am
SJO
- SEA
3 stops16h 31m
United Airlines
Deal found 6/25![United Airlines logo]()
$683
This Delta deal was found by Cheapflights users on 6/24. 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 8/203:50 pm
SEA
- SJO
1 stop18h 59m
Delta
Tue 8/251:14 pm
SJO
- SEA
1 stop11h 43m
Delta
Deal found 6/24![Delta logo]()
$780
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:11 am
SEA
- SJO
1 stop11h 26m
United Airlines
Wed 10/147:55 am
SJO
- SEA
2 stops16h 31m
United Airlines
Deal found 6/27![United Airlines logo]()
$693
This United Airlines deal was found by Cheapflights users on 6/27. 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 7/236:00 am
SEA
- SJO
2 stops27h 11m
United Airlines
Mon 7/2712:30 am
SJO
- SEA
3 stops23h 40m
United Airlines
Deal found 6/27![United Airlines logo]()
$693
This United Airlines deal was found by Cheapflights users on 6/28. 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 8/18:45 am
SEA
- SJO
2 stops19h 45m
United Airlines
Sat 8/86:00 am
SJO
- SEA
1 stop14h 38m
United Airlines
Deal found 6/28![United Airlines logo]()
$693
This United Airlines deal was found by Cheapflights users on 6/25. 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 7/108:05 pm
SEA
- LIR
2 stops15h 05m
United Airlines
Sat 7/188:30 am
LIR
- SEA
1 stop11h 17m
United Airlines
Deal found 6/25![United Airlines logo]()
$732
This United Airlines deal was found by Cheapflights users on 6/27. 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 7/213:33 pm
SEA
- SJO
1 stop14h 42m
United Airlines
Tue 7/2812:30 am
SJO
- SEA
2 stops19h 33m
United Airlines
Deal found 6/27![United Airlines logo]()
$781
This United Airlines deal was found by Cheapflights users on 6/29. 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 7/127:54 pm
SEA
- LIR
2 stops15h 16m
United Airlines
Mon 7/201:20 pm
LIR
- SEA
1 stop10h 22m
United Airlines
Deal found 6/29![United Airlines logo]()
$799
This United Airlines deal was found by Cheapflights users on 6/24. 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 7/145:20 pm
SEA
- LIR
2 stops15h 30m
United Airlines
Fri 7/241:20 pm
LIR
- SEA
2 stops19h 40m
United Airlines
Deal found 6/24![United Airlines logo]()
$827
This United Airlines deal was found by Cheapflights users on 6/24. 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 7/145:20 pm
SEA
- LIR
2 stops17h 50m
United Airlines
Sun 7/2611:49 am
LIR
- SEA
1 stop12h 21m
United Airlines
Deal found 6/24![United Airlines logo]()
$852
This United Airlines deal was found by Cheapflights users on 6/25. 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 7/35:00 am
SEA
- LIR
1 stop9h 19m
United Airlines
Fri 7/103:27 pm
LIR
- SEA
2 stops17h 33m
United Airlines
Deal found 6/25![United Airlines logo]()
$855
This United Airlines deal was found by Cheapflights users on 6/24. 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 7/108:05 pm
SEA
- LIR
2 stops15h 05m
United Airlines
Mon 7/2711:49 am
LIR
- SEA
1 stop21h 11m
United Airlines
Deal found 6/24![United Airlines logo]()
$864
This United Airlines deal was found by Cheapflights users on 6/24. 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 7/126:00 am
SEA
- LIR
2 stops26h 50m
United Airlines
Mon 7/2711:49 am
LIR
- SEA
1 stop21h 11m
United Airlines
Deal found 6/24![United Airlines logo]()
$864
Last-minute flights from Seattle to Costa RicaDiscover last-minute flight deals from Seattle to Costa Rica. Data last updated June 29, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Costa Rica. Data last updated June 29, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 6/27. 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 6/277:05 pm
SEA
- SJO
1 stop11h 10m
United Airlines
Sun 7/1211:13 am
SJO
- SEA
1 stop11h 05m
United Airlines
Deal found 6/27![United Airlines logo]()
$569
This United Airlines deal was found by Cheapflights users on 6/27. 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 6/277:05 pm
SEA
- SJO
1 stop11h 10m
United Airlines
Tue 6/308:45 am
SJO
- SEA
1 stop11h 02m
United Airlines
Deal found 6/27![United Airlines logo]()
$580
This Justfly.com deal was found by Cheapflights users on 6/24. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/39:18 pm
SEA
- SJO
2 stops24h 57m
Multiple Airlines
Sat 7/115:45 am
SJO
- SEA
2 stops18h 13m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$574
This oojo deal was found by Cheapflights users on 6/25. 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 7/76:03 am
SEA
- SJO
2 stops16h 37m
Multiple Airlines
Fri 7/249:40 am
SJO
- SEA
2 stops24h 07m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$575
This United Airlines deal was found by Cheapflights users on 6/25. 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 7/105:00 am
SEA
- LIR
1 stop9h 19m
United Airlines
Sat 7/188:30 am
LIR
- SEA
1 stop15h 49m
United Airlines
Deal found 6/25![United Airlines logo]()
$727
This oojo deal was found by Cheapflights users on 6/24. 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 7/207:26 am
SEA
- SJO
2 stops15h 14m
Multiple Airlines
Tue 7/283:10 pm
SJO
- SEA
2 stops19h 39m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$558
This Priceline deal was found by Cheapflights users on 6/27. 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.
Mon 7/209:18 pm
SEA
- SJO
2 stops24h 57m
Multiple Airlines
Wed 7/291:06 am
SJO
- SEA
1 stop20h 50m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$568
This United Airlines deal was found by Cheapflights users on 6/29. 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 7/2011:49 pm
SEA
- LIR
1 stop9h 01m
United Airlines
Mon 7/2711:10 am
LIR
- SEA
1 stop12h 32m
United Airlines
Deal found 6/29![United Airlines logo]()
$736
This oojo deal was found by Cheapflights users on 6/27. 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 7/228:25 pm
SEA
- SJO
2 stops25h 50m
Multiple Airlines
Sun 7/267:45 am
SJO
- SEA
1 stop15h 15m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$570
This Kiwi.com deal was found by Cheapflights users on 6/27. 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 7/2212:35 pm
SEA
- SJO
2 stops34h 08m
Multiple Airlines
Wed 7/291:06 am
SJO
- SEA
1 stop16h 39m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$583
This oojo deal was found by Cheapflights users on 6/24. 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 7/2412:38 pm
SEA
- SJO
2 stops33h 37m
Multiple Airlines
Fri 7/319:40 am
SJO
- SEA
2 stops24h 07m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$551
This FlightHub deal was found by Cheapflights users on 6/27. 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.
Tue 7/286:03 am
SEA
- SJO
2 stops16h 12m
Multiple Airlines
Tue 8/45:45 am
SJO
- SEA
2 stops18h 13m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$581
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 June 29, 2026.
Search for one-way flight options from Seattle to Costa Rica. Find affordable one-way fares based on user searches. Data last updated June 29, 2026.
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Wed 9/165:34 pm
SEA
- SJO
1 stop19h 23m
American Airlines
Deal found 6/24![American Airlines logo]()
$219
This American Airlines deal was found by Cheapflights users on 6/27. 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 10/125:31 pm
SEA
- SJO
1 stop19h 27m
American Airlines
Deal found 6/27![American Airlines logo]()
$222
This Travelocity deal was found by Cheapflights users on 6/26. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1610:29 pm
SEA
- SJO
2 stops24h 17m
Alaska Airlines
Deal found 6/26![Alaska Airlines logo]()
$224
This eDestinos deal was found by Cheapflights users on 6/25. 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.
Thu 7/236:03 am
SEA
- SJO
1 stop16h 12m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$244
This eDestinos deal was found by Cheapflights users on 6/27. 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.
Mon 8/312:38 pm
SEA
- SJO
1 stop33h 37m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 6/27. 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 9/287:25 pm
SEA
- SJO
2 stops16h 20m
Southwest
Deal found 6/27![Southwest logo]()
$250
This Southwest deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:55 am
SEA
- SJO
1 stop8h 45m
Southwest
Deal found 6/24![Southwest logo]()
$255
This Avianca deal was found by Cheapflights users on 6/27. 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 10/1210:05 am
SEA
- SJO
2 stops12h 10m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$256
This United Airlines deal was found by Cheapflights users on 6/27. 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 9/287:11 am
SEA
- SJO
1 stop11h 26m
United Airlines
Deal found 6/27![United Airlines logo]()
$258
This Avianca deal was found by Cheapflights users on 6/24. 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
SEA
- SJO
2 stops12h 18m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$260
This oojo deal was found by Cheapflights users on 6/25. 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 9/207:10 pm
SEA
- SJO
2 stops15h 20m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$263
This Southwest deal was found by Cheapflights users on 6/25. 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 7/207:30 pm
SEA
- LIR
2 stops16h 40m
Southwest
Deal found 6/25![Southwest logo]()
$303
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 June 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $480 (American Airlines) |
One-way from | $219 (American Airlines) |
Popular in | April |
Cheapest in | October |
Average price | $766 |
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 June 29, 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
SeattleSan José
SEA - SJO
SEASJO
Seattle/Tacoma Intl
Mon 8/17
7:35 pm-12:21 pm
2 stops15h 46m
San José Juan Santamaria Intl
Mon 8/24
8:45 am-6:29 pm
1 stop10h 44m
$558
SeattleSan José
SEA - SJO
SEASJO
Seattle/Tacoma Intl
Wed 9/2
5:00 am-7:37 pm
2 stops13h 37m
San José Juan Santamaria Intl
Sat 9/12
8:45 am-8:43 pm
1 stop12h 58m
$609
SeattleLiberia
SEA - LIR
SEALIR
Seattle/Tacoma Intl
Tue 8/25
3:50 pm-12:00 pm
1 stop19h 10m
Liberia
Mon 8/31
1:25 pm-11:57 pm
1 stop11h 32m
$662
Quickest round-trip
SeattleLiberia
SEA - LIR
SEALIR
Seattle/Tacoma Intl
Fri 9/25
11:13 pm-11:53 am
1 stop11h 40m
Liberia
Sun 10/25
1:20 pm-10:55 pm
1 stop10h 35m
$676
SeattleLiberia
SEA - LIR
SEALIR
Seattle/Tacoma Intl
Fri 9/11
7:25 pm-12:45 pm
2 stops16h 20m
Liberia
Sun 9/20
2:10 pm-11:35 pm
1 stop10h 25m
$683
SeattleSan José
SEA - SJO
SEASJO
Seattle/Tacoma Intl
Mon 11/2
4:20 pm-11:08 pm
1 stop28h 48m
San José Juan Santamaria Intl
Tue 11/3
1:43 am-12:40 pm
1 stop12h 57m
$683
SeattleSan José
SEA - SJO
SEASJO
Seattle/Tacoma Intl
Sat 9/19
3:30 pm-12:21 pm
2 stops19h 51m
San José Juan Santamaria Intl
Sat 9/26
7:55 am-11:26 pm
3 stops16h 31m
$683
SeattleSan José
SEA - SJO
SEASJO
Seattle/Tacoma Intl
Tue 9/29
7:11 am-7:37 pm
1 stop11h 26m
San José Juan Santamaria Intl
Wed 10/14
7:55 am-11:26 pm
2 stops16h 31m
$693
SeattleSan José
SEA - SJO
SEASJO
Seattle/Tacoma Intl
Thu 7/23
6:00 am-10:11 am
2 stops27h 11m
San José Juan Santamaria Intl
Mon 7/27
12:30 am-11:10 pm
3 stops23h 40m
$693
SeattleSan José
SEA - SJO
SEASJO
Seattle/Tacoma Intl
Sat 8/1
8:45 am-5:30 am
2 stops19h 45m
San José Juan Santamaria Intl
Sat 8/8
6:00 am-7:38 pm
1 stop14h 38m
$693
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, December is the cheapest month in which you can book a flight from Seattle to Costa Rica (average of $166). Flying from Seattle to Costa Rica in July is currently the most expensive (average of $519). 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 37 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 June 29, 2026.
Get a feel of what it's like to fly with Alaska Airlines,Southwest, andDelta 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.
Overall
7.9
Food
7.0
Crew
8.5
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Overall
7.9
Food
7.0
Crew
8.5
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Overall
7.9
Food
7.0
Crew
8.5
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Overall
7.9
Food
7.0
Crew
8.5
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Overall
7.9
Food
7.0
Crew
8.5
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Overall
7.9
Food
7.0
Crew
8.5
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Related info for your journey
Find useful and relevant information for your journey from Seattle to Costa Rica. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for Seattle to Costa Rica
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Costa Rica by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Costa Rica by cabin class
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 June 29, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 6 airlines flying from Seattle to Costa Rica
Discover the top 6 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 June 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$316 | Average$638 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$345 | Average$751 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$357 | Average$620 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$362 | Average$682 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$366 | Average$672 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$516 | Average$703 | FlexibilityNo cancel fee | On-time63% |