$130+ 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 6/22. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SJO
Jul 1 — Jul 81
Round-trip
1 adult, Economy
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Find cheap flights from Dulles Intl 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 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 June 1, 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 June 1, 2026.
This American Airlines deal was found by Cheapflights users on 5/27. 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 7/258:21 pm
IAD
- LIR
2 stops18h 54m
American Airlines
Wed 7/292:15 pm
LIR
- IAD
2 stops20h 23m
American Airlines
Deal found 5/27![American Airlines logo]()
$297
This American Airlines deal was found by Cheapflights users on 5/28. 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.
Mon 7/138:22 pm
IAD
- LIR
2 stops18h 53m
American Airlines
Thu 7/163:40 pm
LIR
- IAD
1 stop29h 12m
American Airlines
Deal found 5/28![American Airlines logo]()
$304
This American Airlines deal was found by Cheapflights users on 5/28. 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.
Thu 8/276:38 pm
IAD
- LIR
2 stops20h 37m
American Airlines
Sat 12/191:21 pm
LIR
- IAD
2 stops18h 21m
American Airlines
Deal found 5/28![American Airlines logo]()
$332
This Avianca deal was found by Cheapflights users on 5/30. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/77:35 pm
IAD
- SJO
2 stops14h 55m
Avianca
Fri 8/144:35 pm
SJO
- IAD
2 stops9h 45m
Avianca
Deal found 5/30![Avianca logo]()
$334
This Copa Airlines deal was found by Cheapflights users on 5/29. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/302:21 am
IAD
- SJO
1 stop8h 45m
Copa Airlines
Wed 6/32:59 pm
SJO
- IAD
1 stop7h 34m
Copa Airlines
Deal found 5/29![Copa Airlines logo]()
$344
This American Airlines deal was found by Cheapflights users on 5/30. 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.
Mon 11/96:04 am
IAD
- LIR
1 stop9h 41m
American Airlines
Fri 11/131:21 pm
LIR
- IAD
2 stops18h 20m
American Airlines
Deal found 5/30![American Airlines logo]()
$345
This American Airlines deal was found by Cheapflights users on 5/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/258:22 pm
IAD
- LIR
2 stops18h 56m
American Airlines
Thu 7/22:47 pm
LIR
- IAD
2 stops26h 53m
American Airlines
Deal found 5/29![American Airlines logo]()
$347
This Delta deal was found by Cheapflights users on 5/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:00 am
IAD
- LIR
1 stop8h 00m
Delta
Thu 10/221:25 pm
LIR
- IAD
1 stop8h 55m
Delta
Deal found 5/30![Delta logo]()
$350
This United Airlines deal was found by Cheapflights users on 5/30. 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 9/1910:29 pm
IAD
- LIR
1 stop15h 41m
United Airlines
Fri 9/251:20 pm
LIR
- IAD
1 stop9h 10m
United Airlines
Deal found 5/30![United Airlines logo]()
$351
This Copa Airlines deal was found by Cheapflights users on 6/1. 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.
Fri 6/54:38 pm
IAD
- SJO
1 stop16h 31m
Copa Airlines
Sun 6/74:10 am
SJO
- IAD
1 stop18h 23m
Copa Airlines
Deal found 6/1![Copa Airlines logo]()
$354
This American Airlines deal was found by Cheapflights users on 5/30. 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.
Thu 11/198:09 pm
IAD
- LIR
2 stops19h 04m
American Airlines
Thu 11/263:10 pm
LIR
- IAD
2 stops21h 02m
American Airlines
Deal found 5/30![American Airlines logo]()
$356
This Delta deal was found by Cheapflights users on 5/31. 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 8/166:00 am
IAD
- SJO
1 stop7h 49m
Delta
Wed 10/71:23 pm
SJO
- IAD
1 stop8h 57m
Delta
Deal found 5/31![Delta logo]()
$356
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 June 1, 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 June 1, 2026.
This Copa Airlines deal was found by Cheapflights users on 6/1. 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.
Wed 10/214:34 pm
IAD
- SJO
1 stop16h 36m
Copa Airlines
Tue 10/278:44 am
SJO
- IAD
1 stop13h 53m
Copa Airlines
Deal found 6/1![Copa Airlines logo]()
$354
This Delta deal was found by Cheapflights users on 5/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:00 am
IAD
- SJO
1 stop7h 58m
Delta
Sat 10/311:23 pm
SJO
- IAD
1 stop8h 57m
Delta
Deal found 5/30![Delta logo]()
$356
This United Airlines deal was found by Cheapflights users on 5/29. 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.
Tue 10/276:30 am
IAD
- SJO
1 stop7h 45m
United Airlines
Mon 11/212:35 pm
SJO
- IAD
1 stop9h 01m
United Airlines
Deal found 5/29![United Airlines logo]()
$356
This Copa Airlines deal was found by Cheapflights users on 5/28. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/262:22 am
IAD
- SJO
1 stop10h 44m
Copa Airlines
Mon 8/310:03 am
SJO
- IAD
1 stop16h 18m
Copa Airlines
Deal found 5/28![Copa Airlines logo]()
$412
This United Airlines deal was found by Cheapflights users on 5/29. 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.
Tue 9/88:31 am
IAD
- SJO
1 stop13h 06m
United Airlines
Sun 9/1312:44 pm
SJO
- IAD
1 stop8h 15m
United Airlines
Deal found 5/29![United Airlines logo]()
$425
This Alaska Airlines deal was found by Cheapflights users on 5/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/276:03 am
IAD
- LIR
3 stops26h 34m
Alaska Airlines
Tue 8/46:39 pm
LIR
- IAD
3 stops27h 20m
Alaska Airlines
Deal found 5/28![Alaska Airlines logo]()
$962
This Copa Airlines deal was found by Cheapflights users on 6/1. 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.
Mon 8/244:34 pm
IAD
- SJO
1 stop17h 45m
Copa Airlines
Mon 8/312:48 pm
SJO
- IAD
1 stop11h 33m
Copa Airlines
Deal found 6/1![Copa Airlines logo]()
$470
This United Airlines deal was found by Cheapflights users on 5/31. 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.
Sun 8/1610:29 pm
IAD
- SJO
1 stop15h 52m
United Airlines
Fri 9/257:55 am
SJO
- IAD
1 stop12h 35m
United Airlines
Deal found 5/31![United Airlines logo]()
$476
This Copa Airlines deal was found by Cheapflights users on 6/1. 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 8/294:34 pm
IAD
- SJO
1 stop16h 36m
Copa Airlines
Sun 9/64:08 am
SJO
- IAD
1 stop22h 12m
Copa Airlines
Deal found 6/1![Copa Airlines logo]()
$470
This United Airlines deal was found by Cheapflights users on 5/31. 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.
Sun 11/110:10 pm
IAD
- SJO
1 stop14h 15m
United Airlines
Wed 11/112:20 pm
SJO
- IAD
1 stop8h 31m
United Airlines
Deal found 5/31![United Airlines logo]()
$476
This United Airlines deal was found by Cheapflights users on 5/31. 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.
Sun 10/1810:18 pm
IAD
- SJO
1 stop16h 03m
United Airlines
Thu 10/2911:35 am
SJO
- IAD
1 stop10h 16m
United Airlines
Deal found 5/31![United Airlines logo]()
$476
This Copa Airlines deal was found by Cheapflights users on 5/29. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/214:38 pm
IAD
- SJO
1 stop16h 31m
Copa Airlines
Sat 6/275:57 pm
SJO
- IAD
1 stop19h 08m
Copa Airlines
Deal found 5/29![Copa Airlines logo]()
$495
This Copa Airlines deal was found by Cheapflights users on 6/1. 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.
Mon 11/238:32 am
IAD
- SJO
1 stop24h 47m
Copa Airlines
Thu 12/102:44 pm
SJO
- IAD
1 stop11h 35m
Copa Airlines
Deal found 6/1![Copa Airlines logo]()
$515
This United Airlines deal was found by Cheapflights users on 5/28. 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.
Sun 7/510:23 pm
IAD
- LIR
1 stop18h 56m
United Airlines
Thu 7/1611:10 am
LIR
- IAD
1 stop11h 21m
United Airlines
Deal found 5/28![United Airlines logo]()
$608
This Alaska Airlines deal was found by Cheapflights users on 5/31. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:14 pm
IAD
- LIR
3 stops25h 15m
Alaska Airlines
Tue 8/116:39 pm
LIR
- IAD
3 stops27h 20m
Alaska Airlines
Deal found 5/31![Alaska Airlines logo]()
$1,076
This United Airlines deal was found by Cheapflights users on 5/30. 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.
Sun 6/1410:29 pm
IAD
- LIR
1 stop14h 15m
United Airlines
Sat 6/201:03 pm
LIR
- IAD
1 stop9h 56m
United Airlines
Deal found 5/30![United Airlines logo]()
$702
This Alaska Airlines deal was found by Cheapflights users on 5/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:03 am
IAD
- LIR
2 stops26h 34m
Alaska Airlines
Thu 7/169:03 am
LIR
- IAD
2 stops19h 36m
Alaska Airlines
Deal found 5/30![Alaska Airlines logo]()
$1,103
This United Airlines deal was found by Cheapflights users on 5/28. 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 10/1610:30 pm
IAD
- LIR
1 stop14h 14m
United Airlines
Sun 10/181:20 pm
LIR
- IAD
1 stop9h 10m
United Airlines
Deal found 5/28![United Airlines logo]()
$706
This Alaska Airlines deal was found by Cheapflights users on 5/31. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/156:40 pm
IAD
- LIR
3 stops49h 15m
Alaska Airlines
Sat 12/56:23 pm
LIR
- IAD
2 stops23h 38m
Alaska Airlines
Deal found 5/31![Alaska Airlines logo]()
$1,107
This United Airlines deal was found by Cheapflights users on 5/28. 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.
Tue 8/46:30 am
IAD
- LIR
1 stop7h 40m
United Airlines
Sat 8/811:49 am
LIR
- IAD
1 stop15h 38m
United Airlines
Deal found 5/28![United Airlines logo]()
$737
This Alaska Airlines deal was found by Cheapflights users on 5/31. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/276:03 am
IAD
- LIR
3 stops26h 34m
Alaska Airlines
Fri 7/319:03 am
LIR
- IAD
2 stops19h 36m
Alaska Airlines
Deal found 5/31![Alaska Airlines logo]()
$1,157
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Sun 8/210:23 pm
IAD
- LIR
1 stop18h 56m
United Airlines
Sun 8/94:05 pm
LIR
- IAD
1 stop12h 42m
United Airlines
Deal found 5/27![United Airlines logo]()
$754
This United Airlines deal was found by Cheapflights users on 5/29. 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 6/136:30 am
IAD
- LIR
1 stop10h 49m
United Airlines
Sat 6/201:03 pm
LIR
- IAD
1 stop9h 56m
United Airlines
Deal found 5/29![United Airlines logo]()
$789
This United Airlines deal was found by Cheapflights users on 5/27. 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 8/110:20 pm
IAD
- LIR
1 stop13h 30m
United Airlines
Sat 8/811:49 am
LIR
- IAD
1 stop15h 38m
United Airlines
Deal found 5/27![United Airlines logo]()
$834
Last-minute flights from Dulles Intl to Costa RicaDiscover last-minute flight deals from Dulles Intl to Costa Rica. Data last updated June 1, 2026 and is based on user searches.
Discover last-minute flight deals from Dulles Intl to Costa Rica. Data last updated June 1, 2026 and is based on user searches.
This Copa Airlines deal was found by Cheapflights users on 6/1. 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.
Tue 6/22:21 am
IAD
- SJO
1 stop13h 43m
Copa Airlines
Wed 6/1710:05 am
SJO
- IAD
1 stop16h 16m
Copa Airlines
Deal found 6/1![Copa Airlines logo]()
$359
This United Airlines deal was found by Cheapflights users on 5/31. 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.
Tue 6/26:30 am
IAD
- LIR
1 stop9h 55m
United Airlines
Mon 6/81:20 pm
LIR
- IAD
1 stop9h 11m
United Airlines
Deal found 5/31![United Airlines logo]()
$368
This Copa Airlines deal was found by Cheapflights users on 6/1. 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.
Wed 6/36:25 am
IAD
- SJO
1 stop9h 39m
Copa Airlines
Sun 6/76:19 pm
SJO
- IAD
1 stop8h 02m
Copa Airlines
Deal found 6/1![Copa Airlines logo]()
$344
This Copa Airlines deal was found by Cheapflights users on 5/31. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:25 am
IAD
- SJO
1 stop9h 39m
Copa Airlines
Sat 6/65:57 pm
SJO
- IAD
1 stop8h 24m
Copa Airlines
Deal found 5/31![Copa Airlines logo]()
$364
This Copa Airlines deal was found by Cheapflights users on 6/1. 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.
Fri 6/54:38 pm
IAD
- SJO
1 stop16h 31m
Copa Airlines
Sun 6/74:10 am
SJO
- IAD
1 stop18h 23m
Copa Airlines
Deal found 6/1![Copa Airlines logo]()
$354
This United Airlines deal was found by Cheapflights users on 5/31. 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.
Fri 6/56:30 am
IAD
- SJO
1 stop7h 51m
United Airlines
Fri 6/127:55 am
SJO
- IAD
1 stop12h 48m
United Airlines
Deal found 5/31![United Airlines logo]()
$356
This Copa Airlines deal was found by Cheapflights users on 5/28. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/56:25 am
IAD
- SJO
1 stop9h 39m
Copa Airlines
Mon 6/810:05 am
SJO
- IAD
1 stop12h 28m
Copa Airlines
Deal found 5/28![Copa Airlines logo]()
$366
This Copa Airlines deal was found by Cheapflights users on 6/1. 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.
Mon 6/152:00 am
IAD
- SJO
1 stop7h 09m
Copa Airlines
Sun 6/215:57 pm
SJO
- IAD
1 stop19h 08m
Copa Airlines
Deal found 6/1![Copa Airlines logo]()
$369
This American Airlines deal was found by Cheapflights users on 5/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/258:22 pm
IAD
- LIR
2 stops18h 56m
American Airlines
Thu 7/22:47 pm
LIR
- IAD
2 stops26h 53m
American Airlines
Deal found 5/29![American Airlines logo]()
$347
This American Airlines deal was found by Cheapflights users on 5/28. 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.
Wed 7/81:08 pm
IAD
- LIR
2 stops26h 07m
American Airlines
Tue 7/142:47 pm
LIR
- IAD
2 stops26h 47m
American Airlines
Deal found 5/28![American Airlines logo]()
$367
This American Airlines deal was found by Cheapflights users on 5/28. 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.
Mon 7/138:22 pm
IAD
- LIR
2 stops18h 53m
American Airlines
Thu 7/163:40 pm
LIR
- IAD
1 stop29h 12m
American Airlines
Deal found 5/28![American Airlines logo]()
$304
This American Airlines deal was found by Cheapflights users on 5/27. 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 7/258:21 pm
IAD
- LIR
2 stops18h 54m
American Airlines
Wed 7/292:15 pm
LIR
- IAD
2 stops20h 23m
American Airlines
Deal found 5/27![American Airlines logo]()
$297
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 June 1, 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 June 1, 2026.
This American Airlines deal was found by Cheapflights users on 5/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/228:22 pm
IAD
- LIR
2 stops17h 00m
American Airlines
Deal found 5/29![American Airlines logo]()
$130
This United Airlines deal was found by Cheapflights users on 5/27. 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 8/110:20 pm
IAD
- LIR
1 stop13h 30m
United Airlines
Deal found 5/27![United Airlines logo]()
$153
This United Airlines deal was found by Cheapflights users on 5/30. 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.
Tue 6/306:30 am
IAD
- LIR
1 stop7h 40m
United Airlines
Deal found 5/30![United Airlines logo]()
$154
This United Airlines deal was found by Cheapflights users on 6/1. 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.
Mon 9/76:30 am
IAD
- SJO
1 stop15h 07m
United Airlines
Deal found 6/1![United Airlines logo]()
$157
This United Airlines deal was found by Cheapflights users on 5/28. 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.
Mon 11/96:30 am
IAD
- LIR
1 stop13h 07m
United Airlines
Deal found 5/28![United Airlines logo]()
$159
This American Airlines deal was found by Cheapflights users on 5/30. 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 8/18:21 pm
IAD
- LIR
1 stop17h 09m
American Airlines
Deal found 5/30![American Airlines logo]()
$165
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/258:25 pm
IAD
- SJO
2 stops18h 35m
American Airlines
Deal found 6/1![American Airlines logo]()
$165
This United Airlines deal was found by Cheapflights users on 5/28. 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 6/612:50 pm
IAD
- SJO
1 stop8h 47m
United Airlines
Deal found 5/28![United Airlines logo]()
$167
This United Airlines deal was found by Cheapflights users on 5/30. 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.
Sun 8/96:30 am
IAD
- LIR
1 stop7h 40m
United Airlines
Deal found 5/30![United Airlines logo]()
$168
This American Airlines deal was found by Cheapflights users on 5/27. 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 6/208:22 pm
IAD
- LIR
2 stops18h 56m
American Airlines
Deal found 5/27![American Airlines logo]()
$171
This American Airlines deal was found by Cheapflights users on 5/30. 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.
Wed 6/178:22 pm
IAD
- LIR
2 stops17h 00m
American Airlines
Deal found 5/30![American Airlines logo]()
$176
This United Airlines deal was found by Cheapflights users on 5/28. 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.
Sun 6/76:20 am
IAD
- SJO
1 stop18h 19m
United Airlines
Deal found 5/28![United Airlines logo]()
$177
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 June 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $297 (American Airlines) |
One-way from | $130 (American Airlines) |
Popular in | December |
Cheapest in | October |
Average price | $399 |
Good round-trip deal | $701 or less |
Good one-way deal | $362 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 2,558,603 searches. Data last updated June 1, 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.San José
IAD - SJO
IADSJO
Washington, D.C. Dulles Intl
Wed 10/21
4:34 pm-7:10 am
1 stop16h 36m
San José Juan Santamaria Intl
Tue 10/27
8:44 am-12:37 am
1 stop13h 53m
$354
Washington, D.C.San José
IAD - SJO
IADSJO
Washington, D.C. Dulles Intl
Wed 10/21
6:00 am-11:58 am
1 stop7h 58m
San José Juan Santamaria Intl
Sat 10/31
1:23 pm-12:20 am
1 stop8h 57m
$356
Quickest round-trip
Washington, D.C.San José
IAD - SJO
IADSJO
Washington, D.C. Dulles Intl
Tue 10/27
6:30 am-12:15 pm
1 stop7h 45m
San José Juan Santamaria Intl
Mon 11/2
12:35 pm-10:36 pm
1 stop9h 01m
$356
Washington, D.C.San José
IAD - SJO
IADSJO
Washington, D.C. Dulles Intl
Sun 7/26
2:22 am-11:06 am
1 stop10h 44m
San José Juan Santamaria Intl
Mon 8/3
10:03 am-4:21 am
1 stop16h 18m
$412
Washington, D.C.San José
IAD - SJO
IADSJO
Washington, D.C. Dulles Intl
Tue 9/8
8:31 am-7:37 pm
1 stop13h 06m
San José Juan Santamaria Intl
Sun 9/13
12:44 pm-10:59 pm
1 stop8h 15m
$425
Washington, D.C.San José
IAD - SJO
IADSJO
Washington, D.C. Dulles Intl
Mon 8/24
4:34 pm-8:19 am
1 stop17h 45m
San José Juan Santamaria Intl
Mon 8/31
2:48 pm-4:21 am
1 stop11h 33m
$470
Washington, D.C.San José
IAD - SJO
IADSJO
Washington, D.C. Dulles Intl
Sat 8/29
4:34 pm-7:10 am
1 stop16h 36m
San José Juan Santamaria Intl
Sun 9/6
4:08 am-4:20 am
1 stop22h 12m
$470
Washington, D.C.San José
IAD - SJO
IADSJO
Washington, D.C. Dulles Intl
Sun 8/16
10:29 pm-12:21 pm
1 stop15h 52m
San José Juan Santamaria Intl
Fri 9/25
7:55 am-10:30 pm
1 stop12h 35m
$476
Washington, D.C.San José
IAD - SJO
IADSJO
Washington, D.C. Dulles Intl
Sun 11/1
10:10 pm-11:25 am
1 stop14h 15m
San José Juan Santamaria Intl
Wed 11/11
2:20 pm-11:51 pm
1 stop8h 31m
$476
Washington, D.C.San José
IAD - SJO
IADSJO
Washington, D.C. Dulles Intl
Sun 10/18
10:18 pm-12:21 pm
1 stop16h 03m
San José Juan Santamaria Intl
Thu 10/29
11:35 am-11:51 pm
1 stop10h 16m
$476
Showing 1-10 of 44 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-SJO
IAD-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 Washington, D.C. Dulles Intl Airport to Costa Rica
IAD-CR0
IAD-SJO
IAD-LIR
What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Costa Rica?
Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Costa Rica (average of $109). Flying from Washington, D.C. Dulles Intl Airport to Costa Rica in June is currently the most expensive (average of $259). 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 June 1, 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 4 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 June 1, 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.
Food
7.2
Entertainment
7.8
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Entertainment
7.8
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Entertainment
7.8
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Entertainment
7.8
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Entertainment
7.8
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Entertainment
7.8
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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 June 1, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 6 airlines flying from Dulles Intl to Costa Rica
Discover the top 6 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 2,558,603 searches. Data last updated June 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$174 | Average$356 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$174 | Average$456 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$197 | Average$340 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$238 | Average$371 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$240 | Average$438 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$248 | Average$506 | FlexibilityNo cancel fee | On-time69% |