$158+ Cheap flights from Boston (BOS) 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 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SJO
Jun 16 — Jun 231
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Boston 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 Boston to Costa Rica
Cheapest
Best
Last-minute
One-way
Cheapest flights from Boston to Costa RicaExplore the most affordable flight options available from Boston to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 17, 2026.
Explore the most affordable flight options available from Boston to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 17, 2026.
This Copa Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/14:00 pm
BOS
- SJO
1 stop17h 09m
Copa Airlines
Thu 6/410:05 am
SJO
- BOS
1 stop11h 03m
Copa Airlines
Deal found 5/13![Copa Airlines logo]()
$344
This Avianca deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/24:50 pm
BOS
- SJO
1 stop8h 50m
Avianca
Mon 9/75:05 am
SJO
- BOS
1 stop7h 45m
Avianca
Deal found 5/13![Avianca logo]()
$345
This Kiwi.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/34:50 pm
BOS
- SJO
1 stop8h 50m
Avianca
Mon 9/75:05 am
SJO
- BOS
1 stop7h 45m
Avianca
Deal found 5/13![Avianca logo]()
$353
This Avianca deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/74:50 pm
BOS
- SJO
1 stop8h 50m
Avianca
Sun 6/147:45 pm
SJO
- BOS
1 stop17h 05m
Avianca
Deal found 5/12![Avianca logo]()
$354
This Avianca deal was found by Cheapflights users on 5/16. 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.
Wed 6/104:50 pm
BOS
- SJO
1 stop8h 50m
Avianca
Thu 6/187:45 pm
SJO
- BOS
1 stop17h 05m
Avianca
Deal found 5/16![Avianca logo]()
$355
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/288:15 pm
BOS
- SJO
1 stop17h 39m
Delta
Fri 10/21:25 pm
SJO
- BOS
1 stop9h 41m
Delta
Deal found 5/13![Delta logo]()
$356
This United Airlines deal was found by Cheapflights users on 5/14. 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 9/116:00 am
BOS
- SJO
1 stop7h 38m
United Airlines
Sat 9/197:55 am
SJO
- BOS
1 stop13h 39m
United Airlines
Deal found 5/14![United Airlines logo]()
$358
This Copa Airlines deal was found by Cheapflights users on 5/14. 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 5/158:52 am
BOS
- SJO
1 stop24h 17m
Copa Airlines
Thu 5/216:01 pm
SJO
- BOS
1 stop27h 07m
Copa Airlines
Deal found 5/14![Copa Airlines logo]()
$359
This Avianca deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/164:50 pm
BOS
- SJO
1 stop20h 40m
Avianca
Thu 6/255:05 am
SJO
- BOS
1 stop7h 45m
Avianca
Deal found 5/13![Avianca logo]()
$362
This Avianca deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/133:25 pm
BOS
- SJO
1 stop18h 15m
Avianca
Sat 11/217:50 pm
SJO
- BOS
1 stop17h 00m
Avianca
Deal found 5/12![Avianca logo]()
$364
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/45:47 am
BOS
- LIR
1 stop8h 23m
United Airlines
Mon 6/154:30 pm
LIR
- BOS
1 stop20h 46m
United Airlines
Deal found 5/12![United Airlines logo]()
$474
This American Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:19 pm
BOS
- LIR
2 stops17h 46m
American Airlines
Mon 10/262:10 pm
LIR
- BOS
1 stop20h 00m
American Airlines
Deal found 5/13![American Airlines logo]()
$475
Best flights from Boston to Costa RicaDiscover carefully curated flight deals from Boston to Costa Rica that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 17, 2026.
Discover carefully curated flight deals from Boston to Costa Rica that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 17, 2026.
This Copa Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/244:00 pm
BOS
- SJO
1 stop18h 21m
Copa Airlines
Sun 6/710:05 am
SJO
- BOS
1 stop11h 03m
Copa Airlines
Deal found 5/13![Copa Airlines logo]()
$344
This United Airlines deal was found by Cheapflights users on 5/14. 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.
Tue 6/27:27 pm
BOS
- LIR
2 stops17h 17m
United Airlines
Mon 6/154:30 pm
LIR
- BOS
2 stops24h 44m
United Airlines
Deal found 5/14![United Airlines logo]()
$547
This Delta deal was found by Cheapflights users on 5/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/318:40 pm
BOS
- LIR
1 stop17h 20m
Delta
Sat 8/82:40 pm
LIR
- BOS
1 stop8h 45m
Delta
Deal found 5/15![Delta logo]()
$641
This Copa Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/93:57 pm
BOS
- SJO
1 stop17h 15m
Copa Airlines
Wed 7/224:08 am
SJO
- BOS
1 stop17h 02m
Copa Airlines
Deal found 5/13![Copa Airlines logo]()
$383
This Copa Airlines deal was found by Cheapflights users on 5/17. 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.
Sun 6/148:52 am
BOS
- SJO
1 stop26h 14m
Copa Airlines
Thu 6/185:47 am
SJO
- BOS
1 stop15h 21m
Copa Airlines
Deal found 5/17![Copa Airlines logo]()
$383
This Copa Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/48:52 am
BOS
- SJO
1 stop12h 07m
Copa Airlines
Mon 6/154:10 am
SJO
- BOS
1 stop16h 58m
Copa Airlines
Deal found 5/12![Copa Airlines logo]()
$383
This Copa Airlines deal was found by Cheapflights users on 5/14. 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 6/114:00 pm
BOS
- SJO
1 stop19h 06m
Copa Airlines
Mon 6/158:47 am
SJO
- BOS
1 stop12h 21m
Copa Airlines
Deal found 5/14![Copa Airlines logo]()
$383
This Copa Airlines deal was found by Cheapflights users on 5/17. 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.
Wed 7/83:57 pm
BOS
- SJO
1 stop17h 15m
Copa Airlines
Fri 7/178:45 am
SJO
- BOS
1 stop12h 25m
Copa Airlines
Deal found 5/17![Copa Airlines logo]()
$383
This United Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/58:26 pm
BOS
- LIR
1 stop16h 18m
United Airlines
Mon 6/83:27 pm
LIR
- BOS
2 stops17h 38m
United Airlines
Deal found 5/13![United Airlines logo]()
$561
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/128:15 am
BOS
- LIR
2 stops27h 35m
United Airlines
Mon 7/203:27 pm
LIR
- BOS
2 stops19h 30m
United Airlines
Deal found 5/12![United Airlines logo]()
$561
This United Airlines deal was found by Cheapflights users on 5/17. 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 6/39:30 am
BOS
- LIR
2 stops28h 40m
United Airlines
Thu 6/114:30 pm
LIR
- BOS
2 stops22h 59m
United Airlines
Deal found 5/17![United Airlines logo]()
$561
This Copa Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/184:00 pm
BOS
- SJO
1 stop18h 21m
Copa Airlines
Tue 6/236:19 pm
SJO
- BOS
1 stop18h 25m
Copa Airlines
Deal found 5/12![Copa Airlines logo]()
$422
This Copa Airlines deal was found by Cheapflights users on 5/17. 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.
Wed 7/223:57 pm
BOS
- SJO
1 stop21h 09m
Copa Airlines
Fri 7/314:08 am
SJO
- BOS
1 stop8h 26m
Copa Airlines
Deal found 5/17![Copa Airlines logo]()
$422
This United Airlines deal was found by Cheapflights users on 5/14. 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 5/226:40 pm
BOS
- LIR
1 stop19h 13m
United Airlines
Fri 5/294:30 pm
LIR
- BOS
1 stop16h 46m
United Airlines
Deal found 5/14![United Airlines logo]()
$585
This Copa Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/254:00 pm
BOS
- SJO
1 stop17h 09m
Copa Airlines
Mon 6/14:10 am
SJO
- BOS
1 stop8h 34m
Copa Airlines
Deal found 5/13![Copa Airlines logo]()
$434
This United Airlines deal was found by Cheapflights users on 5/16. 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.
Wed 7/1512:30 pm
BOS
- LIR
2 stops23h 20m
United Airlines
Mon 7/203:27 pm
LIR
- BOS
2 stops17h 38m
United Airlines
Deal found 5/16![United Airlines logo]()
$601
This United Airlines deal was found by Cheapflights users on 5/14. 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.
Sun 5/247:00 pm
BOS
- LIR
2 stops19h 10m
United Airlines
Fri 5/291:20 pm
LIR
- BOS
2 stops23h 20m
United Airlines
Deal found 5/14![United Airlines logo]()
$608
This Copa Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/213:57 pm
BOS
- SJO
1 stop17h 15m
Copa Airlines
Fri 7/314:08 am
SJO
- BOS
1 stop8h 26m
Copa Airlines
Deal found 5/13![Copa Airlines logo]()
$466
This United Airlines deal was found by Cheapflights users on 5/15. 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 7/2012:30 pm
BOS
- LIR
2 stops23h 20m
United Airlines
Tue 7/283:27 pm
LIR
- BOS
2 stops16h 02m
United Airlines
Deal found 5/15![United Airlines logo]()
$641
This United Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/218:15 am
BOS
- LIR
2 stops27h 35m
United Airlines
Mon 6/294:30 pm
LIR
- BOS
2 stops21h 59m
United Airlines
Deal found 5/13![United Airlines logo]()
$684
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/108:15 am
BOS
- LIR
2 stops27h 35m
United Airlines
Sun 7/1911:10 am
LIR
- BOS
2 stops20h 19m
United Airlines
Deal found 5/12![United Airlines logo]()
$684
This Copa Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/214:00 pm
BOS
- SJO
1 stop17h 09m
Copa Airlines
Sat 6/274:10 am
SJO
- BOS
1 stop16h 58m
Copa Airlines
Deal found 5/12![Copa Airlines logo]()
$629
Last-minute flights from Boston to Costa RicaDiscover last-minute flight deals from Boston to Costa Rica. Data last updated May 17, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Costa Rica. Data last updated May 17, 2026 and is based on user searches.
This Copa Airlines deal was found by Cheapflights users on 5/14. 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 5/158:52 am
BOS
- SJO
1 stop24h 17m
Copa Airlines
Thu 5/216:01 pm
SJO
- BOS
1 stop27h 07m
Copa Airlines
Deal found 5/14![Copa Airlines logo]()
$359
This Copa Airlines deal was found by Cheapflights users on 5/15. 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 5/218:52 am
BOS
- SJO
1 stop24h 17m
Copa Airlines
Mon 5/256:01 pm
SJO
- BOS
1 stop27h 07m
Copa Airlines
Deal found 5/15![Copa Airlines logo]()
$368
This Super.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/264:00 pm
BOS
- SJO
1 stop17h 09m
Copa Airlines
Fri 5/296:19 pm
SJO
- BOS
1 stop26h 49m
Copa Airlines
Deal found 5/13![Copa Airlines logo]()
$369
This Copa Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/14:00 pm
BOS
- SJO
1 stop17h 09m
Copa Airlines
Thu 6/410:05 am
SJO
- BOS
1 stop11h 03m
Copa Airlines
Deal found 5/13![Copa Airlines logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/38:52 am
BOS
- SJO
1 stop24h 17m
Copa Airlines
Sun 6/74:10 am
SJO
- BOS
1 stop8h 34m
Copa Airlines
Deal found 5/13![Copa Airlines logo]()
$382
This United Airlines deal was found by Cheapflights users on 5/15. 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.
Wed 6/37:27 pm
BOS
- LIR
2 stops16h 23m
United Airlines
Thu 6/114:30 pm
LIR
- BOS
1 stop13h 47m
United Airlines
Deal found 5/15![United Airlines logo]()
$478
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/45:47 am
BOS
- LIR
1 stop8h 23m
United Airlines
Mon 6/154:30 pm
LIR
- BOS
1 stop20h 46m
United Airlines
Deal found 5/12![United Airlines logo]()
$474
This Avianca deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/74:50 pm
BOS
- SJO
1 stop8h 50m
Avianca
Sun 6/147:45 pm
SJO
- BOS
1 stop17h 05m
Avianca
Deal found 5/12![Avianca logo]()
$354
This Avianca deal was found by Cheapflights users on 5/16. 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.
Wed 6/104:50 pm
BOS
- SJO
1 stop8h 50m
Avianca
Thu 6/187:45 pm
SJO
- BOS
1 stop17h 05m
Avianca
Deal found 5/16![Avianca logo]()
$355
This Copa Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/114:00 pm
BOS
- SJO
1 stop19h 06m
Copa Airlines
Mon 6/155:57 pm
SJO
- BOS
1 stop18h 47m
Copa Airlines
Deal found 5/13![Copa Airlines logo]()
$383
This Avianca deal was found by Cheapflights users on 5/14. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/154:50 pm
BOS
- SJO
1 stop8h 50m
Avianca
Fri 6/195:05 am
SJO
- BOS
1 stop7h 45m
Avianca
Deal found 5/14![Avianca logo]()
$371
This Avianca deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/164:50 pm
BOS
- SJO
1 stop20h 40m
Avianca
Thu 6/255:05 am
SJO
- BOS
1 stop7h 45m
Avianca
Deal found 5/13![Avianca logo]()
$362
One-way flights from Boston to Costa RicaSearch for one-way flight options from Boston to Costa Rica. Find affordable one-way fares based on user searches. Data last updated May 17, 2026.
Search for one-way flight options from Boston to Costa Rica. Find affordable one-way fares based on user searches. Data last updated May 17, 2026.
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/45:47 am
BOS
- SJO
1 stop18h 52m
United Airlines
Deal found 5/12![United Airlines logo]()
$158
This BusinessClass deal was found by Cheapflights users on 5/16. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/76:00 am
BOS
- SJO
1 stop18h 43m
GOL
Deal found 5/16![GOL logo]()
$165
This Air Canada deal was found by Cheapflights users on 5/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:10 am
BOS
- LIR
1 stop8h 55m
Air Canada
Deal found 5/14![Air Canada logo]()
$169
This Air Canada deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/55:50 am
BOS
- LIR
2 stops32h 15m
Air Canada
Deal found 5/13![Air Canada logo]()
$177
This United Airlines deal was found by Cheapflights users on 5/17. 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.
Thu 5/215:47 am
BOS
- SJO
1 stop15h 50m
United Airlines
Deal found 5/17![United Airlines logo]()
$198
This American Airlines deal was found by Cheapflights users on 5/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/285:23 pm
BOS
- SJO
2 stops20h 27m
American Airlines
Deal found 5/17![American Airlines logo]()
$201
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:30 am
BOS
- LIR
1 stop8h 30m
Delta
Deal found 5/13![Delta logo]()
$202
This BusinessClass deal was found by Cheapflights users on 5/17. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/135:45 pm
BOS
- LIR
2 stops19h 37m
GOL
Deal found 5/17![GOL logo]()
$204
This KAYAK deal was found by Cheapflights users on 5/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/211:20 am
BOS
- SJO
2 stops27h 49m
American Airlines
Deal found 5/15![American Airlines logo]()
$206
This American Airlines deal was found by Cheapflights users on 5/15. 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.
Wed 6/36:00 am
BOS
- LIR
1 stop9h 18m
American Airlines
Deal found 5/15![American Airlines logo]()
$207
This American Airlines deal was found by Cheapflights users on 5/15. 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.
Mon 8/105:36 pm
BOS
- LIR
2 stops19h 51m
American Airlines
Deal found 5/15![American Airlines logo]()
$208
This BusinessClass deal was found by Cheapflights users on 5/16. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:22 pm
BOS
- LIR
2 stops20h 05m
GOL
Deal found 5/16![GOL logo]()
$209
Find flight deals from Boston to Costa Rica
Keep the following information in mind while searching for Boston to Costa Rica flight deals. Data was last updated May 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $344 (Copa Airlines) |
One-way from | $158 (United Airlines) |
Popular in | December |
Cheapest in | October |
Average price | $454 |
Good round-trip deal | $622 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Boston 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 May 17, 2026.
Use the filters below to find and compare flights from Boston to Costa Rica that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Sun 5/24
4:00 pm-8:21 am
1 stop18h 21m
San José Juan Santamaria Intl
Sun 6/7
10:05 am-11:08 pm
1 stop11h 03m
$344
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Thu 7/9
3:57 pm-7:12 am
1 stop17h 15m
San José Juan Santamaria Intl
Wed 7/22
4:08 am-11:10 pm
1 stop17h 02m
$383
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Sun 6/14
8:52 am-9:06 am
1 stop26h 14m
San José Juan Santamaria Intl
Thu 6/18
5:47 am-11:08 pm
1 stop15h 21m
$383
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Thu 6/4
8:52 am-6:59 pm
1 stop12h 07m
San José Juan Santamaria Intl
Mon 6/15
4:10 am-11:08 pm
1 stop16h 58m
$383
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Thu 6/11
4:00 pm-9:06 am
1 stop19h 06m
San José Juan Santamaria Intl
Mon 6/15
8:47 am-11:08 pm
1 stop12h 21m
$383
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Wed 7/8
3:57 pm-7:12 am
1 stop17h 15m
San José Juan Santamaria Intl
Fri 7/17
8:45 am-11:10 pm
1 stop12h 25m
$383
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Thu 6/18
4:00 pm-8:21 am
1 stop18h 21m
San José Juan Santamaria Intl
Tue 6/23
6:19 pm-2:44 pm
1 stop18h 25m
$422
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Wed 7/22
3:57 pm-11:06 am
1 stop21h 09m
San José Juan Santamaria Intl
Fri 7/31
4:08 am-2:34 pm
1 stop8h 26m
$422
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Mon 5/25
4:00 pm-7:09 am
1 stop17h 09m
San José Juan Santamaria Intl
Mon 6/1
4:10 am-2:44 pm
1 stop8h 34m
$434
Quickest round-trip
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Tue 7/21
3:57 pm-7:12 am
1 stop17h 15m
San José Juan Santamaria Intl
Fri 7/31
4:08 am-2:34 pm
1 stop8h 26m
$466
Showing 1-10 of 38 resultsSorted by cheapest first
Best time to book a flight from Boston to Costa Rica
Have a flexible travel schedule? Discover the best time to fly to Costa Rica from Boston with our price prediction graph.
BOS-SJO
BOS-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 Boston to Costa Rica
BOS-CR0
BOS-SJO
BOS-LIR
How far ahead should I book a flight from Boston to Costa Rica?
The price you pay for your flight from Boston to Costa Rica may vary depending on when you book. For the best chance of a lower fare, look to book 12 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Boston to Costa Rica?
Currently, September is the cheapest month in which you can book a flight from Boston to Costa Rica (average of $73). Flying from Boston to Costa Rica in December is currently the most expensive (average of $1,131). 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.
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 May 17, 2026.
Peruse reviews from past customers who have flown with Delta,Copa Airlines, andJetBlue from Boston to Costa Rica to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Boarding
8.1
Food
7.2
Overall
7.9
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Boarding
8.1
Food
7.2
Overall
7.9
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Boarding
8.1
Food
7.2
Overall
7.9
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Boarding
8.1
Food
7.2
Overall
7.9
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Boarding
8.1
Food
7.2
Overall
7.9
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Boarding
8.1
Food
7.2
Overall
7.9
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
Find useful and relevant information for your journey from Boston 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 Boston 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 Boston to Costa Rica by cabin class
Find flights from Boston to Costa Rica, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boston and Costa Rica flights
Browse other Boston and Costa Rica flight options. Last updated on May 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 10 airlines flying from Boston to Costa Rica
Discover the top 10 airlines that operate flights from Boston 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 May 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$496 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$143 | Average$397 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$159 | Average$504 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$159 | Average$453 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$179 | Average$380 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$251 | Average$504 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$287 | Average$528 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$309 | Average$439 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$316 | Average$540 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$381 | Average$847 | FlexibilityNo cancel fee | On-time62% |