$146+ Cheap flights from Dulles Intl (IAD) 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 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SJO
Oct 3 — Oct 101
Round-trip
1 adult, Economy
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Find cheap flights from Dulles Intl to Costa Rica with Cheapflights
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Cheapest flights from Dulles Intl to Costa RicaExplore the most affordable flight options available from Dulles Intl to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 3, 2026.
Explore the most affordable flight options available from Dulles Intl to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 3, 2026.
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 11/910:35 pm -
1 stop14h 09m
Fri 11/135:20 pm -
1 stop13h 00m
Deal found 9/2![United Airlines logo]()
$324
This Delta deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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.
Wed 10/286:00 am -
1 stop7h 45m
Tue 11/32:00 pm -
1 stop9h 42m
Deal found 9/2![Delta logo]()
$326
This American Airlines deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 11/95:15 pm -
2 stops20h 18m
Fri 11/133:35 pm -
2 stops18h 42m
Deal found 8/31![American Airlines logo]()
$331
This Air Canada deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 12/89:55 am -
1 stop29h 25m
Mon 12/143:10 pm -
1 stop23h 35m
Deal found 9/1![Air Canada logo]()
$337
This Air Canada deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 10/244:00 pm -
1 stop23h 10m
Wed 10/282:10 pm -
1 stop23h 35m
Deal found 8/31![Air Canada logo]()
$342
This American Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 10/46:52 am -
1 stop8h 55m
Thu 10/82:44 pm -
2 stops16h 00m
Deal found 9/2![American Airlines logo]()
$345
This Air Canada deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” 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 11/164:30 pm -
1 stop22h 40m
Tue 11/243:10 pm -
2 stops19h 18m
Deal found 8/30![Air Canada logo]()
$350
This Air Canada deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 10/259:55 am -
1 stop29h 15m
Mon 11/163:10 pm -
2 stops19h 38m
Deal found 8/31![Air Canada logo]()
$352
This United Airlines deal was found by Cheapflights users on 8/29. 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.
Sat 12/1210:10 pm -
1 stop14h 34m
Thu 12/172:00 pm -
Nonstop4h 35m
Deal found 8/29![United Airlines logo]()
$353
This Air Canada deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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.
Wed 10/284:30 pm -
1 stop22h 40m
Sat 10/312:20 pm -
1 stop29h 03m
Deal found 9/2![Air Canada logo]()
$357
This Booking.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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.
Thu 10/152:25 am -
1 stop6h 59m
Fri 10/235:55 pm -
1 stop8h 25m
Deal found 9/1![Copa Airlines logo]()
$362
This Kiwi.com deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” 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.
Sun 10/42:25 am -
1 stop8h 39m
Sat 10/102:48 pm -
1 stop11h 32m
Deal found 8/30![Copa Airlines logo]()
$363
Best flights from Dulles Intl to Costa RicaDiscover carefully curated flight deals from Dulles Intl to Costa Rica that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 3, 2026.
Discover carefully curated flight deals from Dulles Intl to Costa Rica that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 3, 2026.
This Copa Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/292:25 am -
1 stop6h 59m
Wed 11/46:05 pm -
1 stop8h 10m
Deal found 9/2![Copa Airlines logo]()
$366
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 9/2110:29 pm -
1 stop15h 41m
Fri 9/251:20 pm -
1 stop9h 25m
Deal found 9/2![United Airlines logo]()
$379
This Delta deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 9/206:00 am -
1 stop8h 00m
Tue 9/221:25 pm -
1 stop9h 16m
Deal found 8/31![Delta logo]()
$509
This Air Canada deal was found by Cheapflights users on 8/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/75:46 pm -
2 stops21h 24m
Sat 11/143:10 pm -
1 stop28h 00m
Deal found 8/29![Air Canada logo]()
$605
This Copa Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/233:26 pm -
1 stop16h 36m
Sun 1/318:08 am -
1 stop18h 08m
Deal found 9/1![Copa Airlines logo]()
$366
This United Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/236:15 am -
1 stop7h 55m
Mon 10/267:40 am -
1 stop14h 57m
Deal found 9/1![United Airlines logo]()
$400
This Copa Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/282:25 am -
1 stop10h 33m
Tue 11/35:55 pm -
1 stop8h 20m
Deal found 9/2![Copa Airlines logo]()
$366
This United Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:00 am -
1 stop14h 37m
Sat 11/72:06 pm -
1 stop9h 24m
Deal found 9/1![United Airlines logo]()
$400
This Copa Airlines deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/189:35 am -
1 stop23h 35m
Sat 10/244:08 am -
1 stop22h 12m
Deal found 8/30![Copa Airlines logo]()
$386
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 9/216:30 am -
1 stop7h 40m
Sat 9/264:30 pm -
1 stop12h 49m
Deal found 9/2![United Airlines logo]()
$409
This United Airlines deal was found by Cheapflights users on 8/29. 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.
Thu 11/56:10 am -
1 stop11h 00m
Tue 11/105:20 pm -
1 stop13h 00m
Deal found 8/29![United Airlines logo]()
$455
This Copa Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/163:26 pm -
1 stop16h 36m
Sun 1/2410:01 am -
1 stop16h 12m
Deal found 9/1![Copa Airlines logo]()
$462
This United Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 11/66:10 am -
1 stop14h 43m
Sat 11/142:15 pm -
Nonstop4h 44m
Deal found 9/1![United Airlines logo]()
$466
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 11/1510:35 pm -
1 stop14h 09m
Sat 12/52:06 pm -
1 stop9h 08m
Deal found 9/2![United Airlines logo]()
$475
This United Airlines deal was found by Cheapflights users on 8/29. 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 10/510:18 pm -
1 stop15h 52m
Sat 10/101:20 pm -
1 stop9h 10m
Deal found 8/29![United Airlines logo]()
$483
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 11/78:59 am -
Nonstop5h 01m
Thu 11/128:45 am -
1 stop11h 04m
Deal found 9/2![United Airlines logo]()
$495
This United Airlines deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” 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 9/2510:34 pm -
1 stop18h 45m
Fri 10/21:20 pm -
1 stop9h 10m
Deal found 8/30![United Airlines logo]()
$534
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/110:18 pm -
1 stop15h 52m
Mon 10/51:20 pm -
1 stop9h 10m
Deal found 9/2![United Airlines logo]()
$554
This United Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 1/238:59 am -
Nonstop5h 01m
Fri 1/298:45 am -
1 stop11h 27m
Deal found 9/1![United Airlines logo]()
$554
This United Airlines deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:00 am -
1 stop8h 10m
Fri 11/205:20 pm -
1 stop13h 00m
Deal found 8/30![United Airlines logo]()
$620
This United Airlines deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” 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 12/58:59 am -
Nonstop5h 01m
Sat 12/1211:28 pm -
1 stop22h 32m
Deal found 8/30![United Airlines logo]()
$621
Last-minute flights from Dulles Intl to Costa RicaDiscover last-minute flight deals from Dulles Intl to Costa Rica. Data last updated September 3, 2026 and is based on user searches.
Discover last-minute flight deals from Dulles Intl to Costa Rica. Data last updated September 3, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 9/277:35 pm -
2 stops19h 43m
Fri 10/22:18 pm -
2 stops25h 13m
Deal found 8/31![American Airlines logo]()
$364
This American Airlines deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 9/286:52 am -
1 stop8h 55m
Sat 10/1012:32 pm -
1 stop9h 26m
Deal found 8/31![American Airlines logo]()
$361
This American Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 10/46:52 am -
1 stop8h 55m
Thu 10/82:44 pm -
2 stops16h 00m
Deal found 9/2![American Airlines logo]()
$345
This Kiwi.com deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” 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.
Sun 10/42:25 am -
1 stop8h 39m
Sat 10/102:48 pm -
1 stop11h 32m
Deal found 8/30![Copa Airlines logo]()
$363
This United Airlines deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 10/56:15 am -
1 stop7h 55m
Sat 10/101:03 pm -
1 stop9h 47m
Deal found 8/31![United Airlines logo]()
$363
This Booking.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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.
Thu 10/152:25 am -
1 stop6h 59m
Fri 10/235:55 pm -
1 stop8h 25m
Deal found 9/1![Copa Airlines logo]()
$362
This American Airlines deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” 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 10/247:13 pm -
2 stops20h 05m
Fri 10/302:44 pm -
2 stops21h 34m
Deal found 8/30![American Airlines logo]()
$331
This Air Canada deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 10/244:00 pm -
1 stop23h 10m
Wed 10/282:10 pm -
1 stop23h 35m
Deal found 8/31![Air Canada logo]()
$342
This Air Canada deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/2410:10 pm -
2 stops17h 00m
Sun 11/13:10 pm -
1 stop28h 00m
Deal found 9/1![Air Canada logo]()
$347
This Air Canada deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 10/259:55 am -
1 stop29h 15m
Mon 11/163:10 pm -
1 stop28h 00m
Deal found 8/31![Air Canada logo]()
$352
This Delta deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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.
Wed 10/286:00 am -
1 stop7h 45m
Tue 11/32:00 pm -
1 stop9h 42m
Deal found 9/2![Delta logo]()
$326
This Air Canada deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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.
Wed 10/284:30 pm -
1 stop22h 40m
Sat 10/312:20 pm -
1 stop29h 03m
Deal found 9/2![Air Canada logo]()
$357
One-way flights from Dulles Intl to Costa RicaSearch for one-way flight options from Dulles Intl to Costa Rica. Find affordable one-way fares based on user searches. Data last updated September 3, 2026.
Search for one-way flight options from Dulles Intl to Costa Rica. Find affordable one-way fares based on user searches. Data last updated September 3, 2026.
This United Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/2510:35 pm -
1 stop14h 09m
Deal found 9/1![United Airlines logo]()
$146
This Delta deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 9/216:00 am -
1 stop8h 00m
Deal found 8/31![Delta logo]()
$147
This American Airlines deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 9/214:56 pm -
2 stops22h 22m
Deal found 8/31![American Airlines logo]()
$153
This Air Canada deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” 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 10/244:00 pm -
1 stop23h 10m
Deal found 8/30![Air Canada logo]()
$158
This American Airlines deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” 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 9/194:56 pm -
1 stop22h 51m
Deal found 8/30![American Airlines logo]()
$161
This United Airlines deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/318:59 am -
Nonstop5h 01m
Deal found 8/31![United Airlines logo]()
$163
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2410:18 pm -
1 stop14h 07m
Deal found 9/2![United Airlines logo]()
$168
This American Airlines deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 2/204:41 pm -
2 stops18h 44m
Deal found 8/31![American Airlines logo]()
$173
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 9/1610:29 pm -
1 stop15h 52m
Deal found 9/3![United Airlines logo]()
$178
This Delta deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 10/316:00 am -
1 stop7h 45m
Deal found 9/2![Delta logo]()
$184
This Jetabroad deal was found by Cheapflights users on 8/29. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/36:40 am -
1 stop18h 19m
Deal found 8/29![Multiple Airlines logo]()
$185
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 9/2110:29 pm -
1 stop15h 52m
Deal found 9/3![United Airlines logo]()
$187
Find flight deals from Dulles Intl to Costa Rica
Keep the following information in mind while searching for Dulles Intl to Costa Rica flight deals. Data was last updated September 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $281 (American Airlines) |
One-way from | $146 (United Airlines) |
Popular in | December |
Cheapest in | October |
Average price | $386 |
Good round-trip deal | $590 or less |
Good one-way deal | $545 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Dulles Intl 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 3, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Costa Rica that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
Washington, D.C.San José
IAD Washington, D.C. Dulles Intl - SJO San José Juan Santamaria Intl
IADSJO
Washington, D.C. Dulles Intl
Thu 10/29
2:25 am-7:24 am
1 stop6h 59m
San José Juan Santamaria Intl
Wed 11/4
6:05 pm-3:15 am
1 stop8h 10m
$366
Washington, D.C.San José
IAD Washington, D.C. Dulles Intl - SJO San José Juan Santamaria Intl
IADSJO
Washington, D.C. Dulles Intl
Sat 1/23
3:26 pm-7:02 am
1 stop16h 36m
San José Juan Santamaria Intl
Sun 1/31
8:08 am-3:16 am
1 stop18h 08m
$366
Washington, D.C.San José
IAD Washington, D.C. Dulles Intl - SJO San José Juan Santamaria Intl
IADSJO
Washington, D.C. Dulles Intl
Wed 10/28
2:25 am-10:58 am
1 stop10h 33m
San José Juan Santamaria Intl
Tue 11/3
5:55 pm-3:15 am
1 stop8h 20m
$366
Washington, D.C.Liberia
IAD Washington, D.C. Dulles Intl - LIR Liberia
IADLIR
Washington, D.C. Dulles Intl
Mon 9/21
10:29 pm-12:10 pm
1 stop15h 41m
Liberia
Fri 9/25
1:20 pm-12:45 am
1 stop9h 25m
$379
Washington, D.C.San José
IAD Washington, D.C. Dulles Intl - SJO San José Juan Santamaria Intl
IADSJO
Washington, D.C. Dulles Intl
Sun 10/18
9:35 am-7:10 am
1 stop23h 35m
San José Juan Santamaria Intl
Sat 10/24
4:08 am-4:20 am
1 stop22h 12m
$386
Washington, D.C.Liberia
IAD Washington, D.C. Dulles Intl - LIR Liberia
IADLIR
Washington, D.C. Dulles Intl
Fri 10/23
6:15 am-12:10 pm
1 stop7h 55m
Liberia
Mon 10/26
7:40 am-12:37 am
1 stop14h 57m
$400
Washington, D.C.Liberia
IAD Washington, D.C. Dulles Intl - LIR Liberia
IADLIR
Washington, D.C. Dulles Intl
Sat 10/31
6:00 am-6:37 pm
1 stop14h 37m
Liberia
Sat 11/7
2:06 pm-12:30 am
1 stop9h 24m
$400
Washington, D.C.Liberia
IAD Washington, D.C. Dulles Intl - LIR Liberia
IADLIR
Washington, D.C. Dulles Intl
Mon 9/21
6:30 am-12:10 pm
1 stop7h 40m
Liberia
Sat 9/26
4:30 pm-7:19 am
1 stop12h 49m
$409
Washington, D.C.Liberia
IAD Washington, D.C. Dulles Intl - LIR Liberia
IADLIR
Washington, D.C. Dulles Intl
Thu 11/5
6:10 am-4:10 pm
1 stop11h 00m
Liberia
Tue 11/10
5:20 pm-7:20 am
1 stop13h 00m
$455
Washington, D.C.San José
IAD Washington, D.C. Dulles Intl - SJO San José Juan Santamaria Intl
IADSJO
Washington, D.C. Dulles Intl
Sat 1/16
3:26 pm-7:02 am
1 stop16h 36m
San José Juan Santamaria Intl
Sun 1/24
10:01 am-3:13 am
1 stop16h 12m
$462
Showing 1-10 of 35 resultsSorted by cheapest first
Best time to book a flight from Dulles Intl to Costa Rica
Have a flexible travel schedule? Discover the best time to fly to Costa Rica from Dulles Intl with our price prediction graph.
IAD-LIR
IAD-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 Washington, D.C. Dulles Intl Airport to Costa Rica
IAD-CR0
IAD-LIR
IAD-SJO
What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Costa Rica?
Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Costa Rica (average of $322). Flying from Washington, D.C. Dulles Intl Airport to Costa Rica in December is currently the most expensive (average of $550). 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.
What is the cheapest time of day to fly from IAD to CR?
Find hourly flight availability from Dulles Intl to Costa Rica. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 3, 2026.
When flying from Washington, D.C. Dulles Intl Airport to Costa Rica, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Costa Rica?
Booking 28 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Dulles Intl Airport to Costa Rica. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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 3, 2026.
See what other customers who have flown with Delta,Copa Airlines, andUnited Airlines from Washington, D.C. Dulles Intl Airport to Costa Rica have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Related info for your journey
Find useful and relevant information for your journey from Dulles Intl 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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Complete your trip
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Dulles Intl and Costa Rica flights
Browse other Dulles Intl and Costa Rica flight options. Last updated on September 3, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 5 airlines flying from Dulles Intl to Costa Rica
Discover the top 5 airlines that operate flights from Dulles Intl 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 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$136 | Average$531 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$233 | Average$400 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$239 | Average$395 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$240 | Average$507 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$248 | Average$562 | FlexibilityNo cancel fee | On-time69% |