$132+ Cheap flights from Dulles Intl (IAD) 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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SJO
Nov 18 — Nov 251
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Dulles Intl to Costa Rica with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Dulles Intl to Costa Rica
Cheapest
Best
Last-minute
One-way
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 October 19, 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 October 19, 2026.
This American Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 10/276:15 am -
2 stops9h 03m
Thu 10/292:44 pm -
2 stops16h 00m
Deal found 10/16![American Airlines logo]()
$339
This Air Canada deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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 12/19:05 am -
1 stop30h 15m
Tue 12/83:20 pm -
1 stop28h 03m
Deal found 10/17![Air Canada logo]()
$346
This Air Canada deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 11/169:55 am -
1 stop29h 25m
Mon 11/233:10 pm -
1 stop23h 35m
Deal found 10/19![Air Canada logo]()
$351
This American Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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.
Fri 10/306:42 am -
1 stop9h 01m
Tue 11/31:33 pm -
2 stops19h 38m
Deal found 10/16![American Airlines logo]()
$353
This American Airlines deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 12/97:14 pm -
2 stops20h 05m
Fri 12/1811:58 am -
1 stop10h 23m
Deal found 10/18![American Airlines logo]()
$355
This Air Canada deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 11/301:19 pm -
1 stop26h 01m
Sat 12/53:20 pm -
2 stops23h 33m
Deal found 10/16![Air Canada logo]()
$356
This Air Canada deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 12/210:10 pm -
2 stops17h 10m
Wed 12/93:20 pm -
1 stop28h 03m
Deal found 10/18![Air Canada logo]()
$359
This American Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 10/297:13 pm -
1 stop20h 30m
Tue 11/31:33 pm -
2 stops19h 38m
Deal found 10/15![American Airlines logo]()
$362
This American Airlines deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 11/92:42 pm -
2 stops22h 51m
Fri 11/133:17 pm -
1 stop31h 13m
Deal found 10/19![American Airlines logo]()
$363
This Air Canada deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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 10/285:46 pm -
2 stops21h 24m
Mon 11/23:10 pm -
1 stop28h 00m
Deal found 10/17![Air Canada logo]()
$364
This American Airlines deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 12/31:09 pm -
2 stops24h 26m
Thu 12/103:35 pm -
2 stops20h 04m
Deal found 10/19![American Airlines logo]()
$365
This Copa Airlines deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 10/294:34 pm -
1 stop16h 30m
Wed 11/45:55 pm -
1 stop19h 03m
Deal found 10/19![Copa Airlines logo]()
$387
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 October 19, 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 October 19, 2026.
This United Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 2/76:00 am -
1 stop8h 10m
Fri 2/128:45 am -
1 stop12h 51m
Deal found 10/15![United Airlines logo]()
$351
This Copa Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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.
Mon 10/264:34 pm -
1 stop18h 30m
Sun 11/16:10 pm -
1 stop18h 48m
Deal found 10/15![Copa Airlines logo]()
$387
This Delta deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 10/306:00 am -
1 stop7h 45m
Tue 11/32:00 pm -
1 stop9h 42m
Deal found 10/16![Delta logo]()
$400
This United Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/116:00 am -
1 stop8h 10m
Sat 1/162:06 pm -
1 stop9h 39m
Deal found 10/15![United Airlines logo]()
$379
This Copa Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 10/224:34 pm -
1 stop16h 36m
Sat 10/243:58 am -
1 stop18h 39m
Deal found 10/15![Copa Airlines logo]()
$387
This United Airlines deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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 11/166:00 am -
1 stop8h 22m
Sat 11/212:15 pm -
Nonstop4h 44m
Deal found 10/17![United Airlines logo]()
$389
This Copa Airlines deal was found by Cheapflights users on 10/14. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/232:25 am -
1 stop8h 39m
Tue 2/25:34 am -
1 stop7h 25m
Deal found 10/14![Copa Airlines logo]()
$407
This Delta deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 1/206:00 am -
1 stop7h 45m
Thu 1/283:25 pm -
1 stop7h 55m
Deal found 10/18![Delta logo]()
$453
This United Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/910:28 pm -
1 stop15h 28m
Sat 1/162:06 pm -
1 stop9h 39m
Deal found 10/15![United Airlines logo]()
$411
This Kiwi.com deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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.
Thu 11/122:30 am -
2 stops15h 30m
Mon 11/233:05 pm -
2 stops27h 22m
Deal found 10/17![Multiple Airlines logo]()
$1,146
This United Airlines deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/96:00 am -
1 stop8h 10m
Fri 12/182:00 pm -
Nonstop4h 35m
Deal found 10/18![United Airlines logo]()
$491
This Copa Airlines deal was found by Cheapflights users on 10/14. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/198:32 am -
1 stop23h 30m
Thu 11/262:46 pm -
1 stop7h 47m
Deal found 10/14![Copa Airlines logo]()
$553
This United Airlines deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 2/288:30 am -
1 stop11h 07m
Sun 3/72:06 pm -
1 stop18h 19m
Deal found 10/18![United Airlines logo]()
$500
This United Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 11/156:00 am -
1 stop13h 37m
Sat 12/52:06 pm -
1 stop9h 18m
Deal found 10/16![United Airlines logo]()
$509
This Copa Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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.
Mon 11/231:16 am -
1 stop8h 51m
Tue 11/246:10 pm -
1 stop8h 05m
Deal found 10/16![Copa Airlines logo]()
$639
This United Airlines deal was found by Cheapflights users on 10/14. 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 12/410:15 pm -
1 stop15h 41m
Tue 12/85:20 pm -
1 stop13h 02m
Deal found 10/14![United Airlines logo]()
$509
This United Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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
Sun 12/1311:28 pm -
1 stop10h 57m
Deal found 10/15![United Airlines logo]()
$560
This Copa Airlines deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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.
Tue 11/171:16 am -
1 stop8h 51m
Sun 11/298:44 am -
1 stop17h 31m
Deal found 10/17![Copa Airlines logo]()
$842
This United Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 1/106:00 am -
1 stop8h 10m
Sun 1/179:25 am -
1 stop19h 00m
Deal found 10/16![United Airlines logo]()
$580
This Kiwi.com deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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 11/172:30 am -
2 stops11h 25m
Mon 11/233:05 pm -
2 stops27h 22m
Deal found 10/17![Multiple Airlines logo]()
$1,263
This Copa Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 11/191:16 am -
1 stop8h 51m
Sun 11/295:37 am -
1 stop16h 56m
Deal found 10/16![Copa Airlines logo]()
$882
This United Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 1/96:00 am -
1 stop8h 10m
Sun 1/179:25 am -
1 stop14h 34m
Deal found 10/15![United Airlines logo]()
$608
This United Airlines deal was found by Cheapflights users on 10/14. 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.
Thu 3/46:30 am -
1 stop13h 07m
Tue 3/98:35 am -
1 stop14h 16m
Deal found 10/14![United Airlines logo]()
$660
This Kiwi.com deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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.
Thu 12/102:30 am -
2 stops13h 25m
Mon 12/143:05 pm -
2 stops11h 10m
Deal found 10/18![Multiple Airlines logo]()
$1,583
This United Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 12/136:05 am -
1 stop7h 37m
Sat 12/192:15 pm -
Nonstop4h 44m
Deal found 10/16![United Airlines logo]()
$672
This Kiwi.com deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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 11/302:30 am -
2 stops9h 00m
Tue 12/83:15 pm -
2 stops11h 00m
Deal found 10/17![Multiple Airlines logo]()
$1,586
This United Airlines deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1612:39 pm -
1 stop8h 14m
Sat 1/237:30 am -
1 stop11h 06m
Deal found 10/17![United Airlines logo]()
$719
This United Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 12/1212:38 pm -
1 stop8h 15m
Thu 12/248:45 am -
1 stop11h 06m
Deal found 10/16![United Airlines logo]()
$743
This Kiwi.com deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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.
Thu 12/242:30 am -
2 stops11h 25m
Fri 1/16:55 am -
2 stops37h 35m
Deal found 10/16![Multiple Airlines logo]()
$2,115
Last-minute flights from Dulles Intl to Costa RicaDiscover last-minute flight deals from Dulles Intl to Costa Rica. Data last updated October 19, 2026 and is based on user searches.
Discover last-minute flight deals from Dulles Intl to Costa Rica. Data last updated October 19, 2026 and is based on user searches.
This Air Canada deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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 10/245:15 pm -
2 stops21h 55m
Wed 10/282:10 pm -
2 stops23h 43m
Deal found 10/17![Air Canada logo]()
$366
This American Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 10/276:15 am -
2 stops9h 03m
Thu 10/292:44 pm -
2 stops16h 00m
Deal found 10/16![American Airlines logo]()
$339
This Air Canada deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 10/285:46 pm -
2 stops21h 24m
Mon 11/23:10 pm -
1 stop28h 00m
Deal found 10/19![Air Canada logo]()
$364
This American Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 10/297:13 pm -
1 stop20h 30m
Tue 11/31:33 pm -
2 stops19h 38m
Deal found 10/15![American Airlines logo]()
$362
This Copa Airlines deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 10/294:34 pm -
1 stop18h 30m
Tue 11/38:44 am -
1 stop17h 31m
Deal found 10/19![Copa Airlines logo]()
$387
This American Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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.
Fri 10/306:42 am -
1 stop9h 01m
Tue 11/31:33 pm -
2 stops19h 38m
Deal found 10/16![American Airlines logo]()
$353
This United Airlines deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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 11/76:00 am -
1 stop13h 37m
Tue 11/102:20 pm -
1 stop9h 17m
Deal found 10/17![United Airlines logo]()
$370
This American Airlines deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 11/92:42 pm -
2 stops22h 51m
Fri 11/133:35 pm -
2 stops18h 42m
Deal found 10/19![American Airlines logo]()
$355
This Avianca deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/102:30 am -
1 stop12h 25m
Sat 11/213:10 pm -
1 stop9h 25m
Deal found 10/16![Avianca logo]()
$389
This Air Canada deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 11/169:55 am -
1 stop29h 25m
Mon 11/233:10 pm -
1 stop23h 35m
Deal found 10/19![Air Canada logo]()
$351
This Air Canada deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” 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 11/165:20 pm -
2 stops22h 00m
Thu 11/193:10 pm -
2 stops19h 38m
Deal found 10/19![Air Canada logo]()
$361
This Air Canada deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 11/301:19 pm -
1 stop26h 01m
Sat 12/53:20 pm -
2 stops23h 33m
Deal found 10/16![Air Canada logo]()
$356
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 October 19, 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 October 19, 2026.
This American Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 1/127:00 am -
1 stop8h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![American Airlines logo]()
$132
This American Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 12/67:04 pm -
2 stops20h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![American Airlines logo]()
$138
This United Airlines deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 11/410:10 pm -
1 stop19h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![United Airlines logo]()
$156
This United Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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 12/66:00 am -
1 stop8h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![United Airlines logo]()
$159
This Air Canada deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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 11/239:55 am -
1 stop29h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/17![Air Canada logo]()
$160
This Flightnetwork deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/69:05 am -
2 stops30h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![Air Canada logo]()
$162
This Air Canada deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 11/165:20 pm -
2 stops22h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![Air Canada logo]()
$165
This Air Canada deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/291:19 pm -
2 stops25h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![Air Canada logo]()
$170
This American Airlines deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” 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 10/311:23 pm -
2 stops26h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![American Airlines logo]()
$171
This Mytrip deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/256:40 am -
1 stop19h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Multiple Airlines logo]()
$171
This United Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/48:27 am -
1 stop11h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![United Airlines logo]()
$172
This Air Canada deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/710:10 pm -
2 stops17h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![Air Canada logo]()
$173
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 October 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $301 (American Airlines) |
One-way from | $132 (American Airlines) |
Popular in | December |
Cheapest in | May |
Average price | $418 |
Good round-trip deal | $527 or less |
Good one-way deal | $261 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 October 19, 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
Washington, D.C.Liberia
IAD Washington, D.C. Dulles Intl - LIR Liberia
IADLIR
Washington, D.C. Dulles Intl
Sun 11/15
8:34 am-6:37 pm
1 stop11h 03m
Liberia
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$156
Washington, D.C.Liberia
IAD Washington, D.C. Dulles Intl - LIR Liberia
IADLIR
Washington, D.C. Dulles Intl
Mon 3/22
10:10 pm-12:10 pm
1 stop16h 00m
Liberia
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$159
Washington, D.C.Liberia
IAD Washington, D.C. Dulles Intl - LIR Liberia
IADLIR
Washington, D.C. Dulles Intl
Sun 12/6
6:00 am-1:10 pm
1 stop8h 10m
Liberia
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$159
Washington, D.C.Liberia
IAD Washington, D.C. Dulles Intl - LIR Liberia
IADLIR
Washington, D.C. Dulles Intl
Mon 11/23
5:20 pm-2:20 pm
2 stops22h 00m
Liberia
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$165
Washington, D.C.Liberia
IAD Washington, D.C. Dulles Intl - LIR Liberia
IADLIR
Washington, D.C. Dulles Intl
Sat 1/9
8:25 am-6:37 pm
1 stop11h 12m
Liberia
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$181
Washington, D.C.Liberia
IAD Washington, D.C. Dulles Intl - LIR Liberia
IADLIR
Washington, D.C. Dulles Intl
Sat 11/14
6:00 am-6:37 pm
1 stop13h 37m
Liberia
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$187
Washington, D.C.Liberia
IAD Washington, D.C. Dulles Intl - LIR Liberia
IADLIR
Washington, D.C. Dulles Intl
Thu 1/14
10:28 pm-12:56 pm
1 stop15h 28m
Liberia
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$194
Quickest round-trip
Washington, D.C.Liberia
IAD Washington, D.C. Dulles Intl - LIR Liberia
IADLIR
Washington, D.C. Dulles Intl
Mon 1/4
8:51 am-12:50 pm
Nonstop4h 59m
Liberia
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$196
Washington, D.C.San José
IAD Washington, D.C. Dulles Intl - SJO San José Juan Santamaria Intl
IADSJO
Washington, D.C. Dulles Intl
Sun 11/8
5:54 pm-11:25 am
1 stop18h 31m
San José Juan Santamaria Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$220
Washington, D.C.Liberia
IAD Washington, D.C. Dulles Intl - LIR Liberia
IADLIR
Washington, D.C. Dulles Intl
Tue 12/29
10:54 pm-11:24 am
1 stop13h 30m
Liberia
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$221
Showing 1-10 of 49 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
IAD-LIO
IAD-XQP
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
IAD-LIO
IAD-XQP
What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Costa Rica?
Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Costa Rica (average of $381). Flying from Washington, D.C. Dulles Intl Airport to Costa Rica in December is currently the most expensive (average of $583). 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 October 19, 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 90 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 October 19, 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.
Comfort
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - 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.
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.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Alternative routes for Dulles Intl 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 Dulles Intl to Costa Rica by cabin class
Find flights from Dulles Intl to Costa Rica, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Dulles Intl and Costa Rica flights
Browse other Dulles Intl and Costa Rica flight options. Last updated on October 19, 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 October 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$186 | Average$530 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$225 | Average$422 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$240 | Average$516 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$245 | Average$408 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$261 | Average$578 | FlexibilityNo cancel fee | On-time69% |