$145+ 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 6/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SJO
Jun 5 — Jun 121
Round-trip
1 adult, Economy
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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
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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 6, 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 6, 2026.
This Avianca deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 5/5![Avianca logo]()
$339
This Avianca deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 5/204:50 pm
BOS
- SJO
1 stop8h 50m
Avianca
Wed 6/35:05 am
SJO
- BOS
1 stop7h 45m
Avianca
Deal found 5/5![Avianca logo]()
$343
This Copa Airlines deal was found by Cheapflights users on 5/1. 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.
Thu 5/144:00 pm
BOS
- SJO
1 stop18h 21m
Copa Airlines
Fri 5/224:10 am
SJO
- BOS
1 stop16h 58m
Copa Airlines
Deal found 5/1![Copa Airlines logo]()
$344
This Avianca deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/294:50 pm
BOS
- SJO
1 stop8h 50m
Avianca
Fri 9/45:05 am
SJO
- BOS
1 stop7h 45m
Avianca
Deal found 5/2![Avianca logo]()
$347
This Avianca deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 10/94:50 pm
BOS
- SJO
1 stop8h 50m
Avianca
Sat 10/177:45 pm
SJO
- BOS
1 stop17h 05m
Avianca
Deal found 5/5![Avianca logo]()
$349
This United Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/28:30 am
BOS
- SJO
2 stops13h 07m
United Airlines
Sat 5/91:00 pm
SJO
- BOS
1 stop9h 59m
United Airlines
Deal found 5/1![United Airlines logo]()
$350
This Avianca deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/184:50 pm
BOS
- SJO
1 stop8h 50m
Avianca
Tue 6/27:45 pm
SJO
- BOS
1 stop17h 05m
Avianca
Deal found 5/3![Avianca logo]()
$353
This Copa Airlines deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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 5/144:00 pm
BOS
- SJO
1 stop17h 09m
Copa Airlines
Sun 5/1710:05 am
SJO
- BOS
1 stop11h 03m
Copa Airlines
Deal found 5/6![Copa Airlines logo]()
$354
This American Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 10/147:19 pm
BOS
- SJO
2 stops17h 46m
American Airlines
Wed 10/211:05 pm
SJO
- BOS
2 stops16h 10m
American Airlines
Deal found 5/4![American Airlines logo]()
$355
This Avianca deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/54:50 pm
BOS
- SJO
1 stop20h 40m
Avianca
Mon 6/85:05 am
SJO
- BOS
1 stop7h 45m
Avianca
Deal found 5/4![Avianca logo]()
$356
This BusinessClass deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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.
Tue 6/26:57 pm
BOS
- SJO
2 stops18h 53m
GOL
Fri 6/52:00 pm
SJO
- BOS
1 stop17h 21m
GOL
Deal found 5/5![GOL logo]()
$357
This JetBlue deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:55 am
BOS
- SJO
1 stop7h 02m
JetBlue
Wed 8/261:05 pm
SJO
- BOS
1 stop9h 37m
JetBlue
Deal found 5/2![JetBlue logo]()
$358
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 6, 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 6, 2026.
This Copa Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 5/124:00 pm
BOS
- SJO
1 stop20h 00m
Copa Airlines
Mon 5/258:47 am
SJO
- BOS
1 stop12h 21m
Copa Airlines
Deal found 5/4![Copa Airlines logo]()
$344
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/92:15 pm
BOS
- SJO
2 stops21h 56m
United Airlines
Mon 6/1512:30 am
SJO
- BOS
2 stops16h 44m
United Airlines
Deal found 5/5![United Airlines logo]()
$475
This Copa Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/128:52 am
BOS
- SJO
1 stop26h 14m
Copa Airlines
Thu 5/216:19 pm
SJO
- BOS
1 stop26h 49m
Copa Airlines
Deal found 5/2![Copa Airlines logo]()
$344
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/17:10 pm
BOS
- LIR
1 stop18h 50m
Delta
Wed 8/51:25 pm
LIR
- BOS
1 stop10h 00m
Delta
Deal found 5/4![Delta logo]()
$702
This Copa Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 5/264:00 pm
BOS
- SJO
1 stop18h 21m
Copa Airlines
Tue 6/24:10 am
SJO
- BOS
1 stop16h 58m
Copa Airlines
Deal found 5/4![Copa Airlines logo]()
$344
This Copa Airlines deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/278:52 am
BOS
- SJO
1 stop24h 17m
Copa Airlines
Wed 6/105:47 am
SJO
- BOS
1 stop15h 21m
Copa Airlines
Deal found 5/3![Copa Airlines logo]()
$385
This United Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:00 am
BOS
- SJO
3 stops18h 39m
United Airlines
Tue 6/912:30 am
SJO
- BOS
2 stops21h 29m
United Airlines
Deal found 5/2![United Airlines logo]()
$479
This Copa Airlines deal was found by Cheapflights users on 5/1. 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 6/14:00 pm
BOS
- SJO
1 stop19h 06m
Copa Airlines
Thu 6/254:10 am
SJO
- BOS
1 stop16h 58m
Copa Airlines
Deal found 5/1![Copa Airlines logo]()
$385
This Copa Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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
Wed 6/108:47 am
SJO
- BOS
1 stop12h 21m
Copa Airlines
Deal found 5/5![Copa Airlines logo]()
$395
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 7/159:50 am
BOS
- LIR
2 stops26h 00m
United Airlines
Mon 7/203:27 pm
LIR
- BOS
2 stops17h 38m
United Airlines
Deal found 5/5![United Airlines logo]()
$561
This Copa Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 5/308:52 am
BOS
- SJO
1 stop24h 17m
Copa Airlines
Sat 6/135:57 pm
SJO
- BOS
1 stop27h 11m
Copa Airlines
Deal found 5/5![Copa Airlines logo]()
$421
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 5/298:26 pm
BOS
- LIR
2 stops17h 44m
United Airlines
Mon 6/13:27 pm
LIR
- BOS
2 stops16h 02m
United Airlines
Deal found 5/4![United Airlines logo]()
$561
This Copa Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 7/73:57 pm
BOS
- SJO
1 stop17h 15m
Copa Airlines
Thu 7/235:45 am
SJO
- BOS
1 stop15h 25m
Copa Airlines
Deal found 5/5![Copa Airlines logo]()
$421
This United Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2212:30 pm
BOS
- LIR
2 stops23h 20m
United Airlines
Tue 5/263:27 pm
LIR
- BOS
2 stops16h 12m
United Airlines
Deal found 5/2![United Airlines logo]()
$561
This Copa Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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
Mon 6/225:57 pm
SJO
- BOS
1 stop18h 47m
Copa Airlines
Deal found 5/5![Copa Airlines logo]()
$436
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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
Sun 6/74:30 pm
LIR
- BOS
1 stop20h 46m
United Airlines
Deal found 5/4![United Airlines logo]()
$603
This Copa Airlines deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/198:52 am
BOS
- SJO
1 stop26h 14m
Copa Airlines
Sun 6/285:47 am
SJO
- BOS
1 stop15h 21m
Copa Airlines
Deal found 5/3![Copa Airlines logo]()
$469
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 8/158:22 pm
BOS
- LIR
2 stops17h 48m
United Airlines
Sat 8/221:20 pm
LIR
- BOS
2 stops18h 03m
United Airlines
Deal found 5/5![United Airlines logo]()
$633
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/39:50 am
BOS
- LIR
2 stops26h 54m
United Airlines
Wed 8/53:27 pm
LIR
- BOS
2 stops16h 02m
United Airlines
Deal found 5/4![United Airlines logo]()
$683
This United Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/108:20 pm
BOS
- LIR
2 stops20h 05m
United Airlines
Sun 7/123:27 pm
LIR
- BOS
2 stops17h 38m
United Airlines
Deal found 5/2![United Airlines logo]()
$683
This United Airlines deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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 6/69:50 am
BOS
- LIR
2 stops26h 54m
United Airlines
Sun 6/143:27 pm
LIR
- BOS
2 stops17h 38m
United Airlines
Deal found 5/6![United Airlines logo]()
$683
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/102:15 pm
BOS
- LIR
2 stops21h 35m
United Airlines
Wed 6/174:30 pm
LIR
- BOS
1 stop20h 46m
United Airlines
Deal found 5/5![United Airlines logo]()
$689
This United Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/198:15 am
BOS
- LIR
2 stops29h 55m
United Airlines
Sun 7/2611:10 am
LIR
- BOS
2 stops21h 55m
United Airlines
Deal found 5/1![United Airlines logo]()
$793
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/247:27 pm
BOS
- LIR
2 stops16h 23m
United Airlines
Sun 6/2811:10 am
LIR
- BOS
2 stops21h 55m
United Airlines
Deal found 5/5![United Airlines logo]()
$875
Last-minute flights from Boston to Costa RicaDiscover last-minute flight deals from Boston to Costa Rica. Data last updated May 6, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Costa Rica. Data last updated May 6, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 5/56:00 am
BOS
- SJO
1 stop9h 22m
American Airlines
Tue 5/122:31 pm
SJO
- BOS
1 stop17h 31m
American Airlines
Deal found 5/4![American Airlines logo]()
$350
This American Airlines deal was found by Cheapflights users on 5/1. 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.
Thu 5/77:00 am
BOS
- SJO
1 stop16h 36m
American Airlines
Tue 5/1212:35 pm
SJO
- BOS
1 stop19h 26m
American Airlines
Deal found 5/1![American Airlines logo]()
$358
This Copa Airlines deal was found by Cheapflights users on 5/1. 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.
Thu 5/144:00 pm
BOS
- SJO
1 stop18h 21m
Copa Airlines
Fri 5/224:10 am
SJO
- BOS
1 stop16h 58m
Copa Airlines
Deal found 5/1![Copa Airlines logo]()
$344
This Copa Airlines deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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 5/144:00 pm
BOS
- SJO
1 stop17h 09m
Copa Airlines
Sun 5/1710:05 am
SJO
- BOS
1 stop11h 03m
Copa Airlines
Deal found 5/6![Copa Airlines logo]()
$354
This Copa Airlines deal was found by Cheapflights users on 5/1. 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.
Thu 5/144:00 pm
BOS
- SJO
1 stop7h 47m
Copa Airlines
Tue 5/266:19 pm
SJO
- BOS
1 stop18h 25m
Copa Airlines
Deal found 5/1![Copa Airlines logo]()
$359
This Avianca deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/184:50 pm
BOS
- SJO
1 stop8h 50m
Avianca
Tue 6/27:45 pm
SJO
- BOS
1 stop17h 05m
Avianca
Deal found 5/3![Avianca logo]()
$353
This Avianca deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 5/204:50 pm
BOS
- SJO
1 stop8h 50m
Avianca
Wed 6/35:05 am
SJO
- BOS
1 stop7h 45m
Avianca
Deal found 5/5![Avianca logo]()
$343
This Avianca deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/14:50 pm
BOS
- SJO
1 stop8h 50m
Avianca
Sat 6/67:45 pm
SJO
- BOS
1 stop17h 05m
Avianca
Deal found 5/5![Avianca logo]()
$349
This BusinessClass deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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.
Tue 6/26:57 pm
BOS
- SJO
2 stops18h 53m
GOL
Fri 6/52:00 pm
SJO
- BOS
1 stop17h 21m
GOL
Deal found 5/5![GOL logo]()
$357
This Avianca deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/54:50 pm
BOS
- SJO
1 stop20h 40m
Avianca
Mon 6/85:05 am
SJO
- BOS
1 stop7h 45m
Avianca
Deal found 5/4![Avianca logo]()
$356
This Air Canada deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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
Sat 6/201:00 pm
LIR
- BOS
2 stops42h 50m
Air Canada
Deal found 5/4![Air Canada logo]()
$468
This Avianca deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 5/5![Avianca logo]()
$339
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 6, 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 6, 2026.
This SmartFares deal was found by Cheapflights users on 5/1. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/156:20 am
BOS
- SJO
1 stop7h 36m
JetBlue
Deal found 5/1![JetBlue logo]()
$145
This United Airlines deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/265:35 pm
BOS
- SJO
1 stop18h 36m
United Airlines
Deal found 5/3![United Airlines logo]()
$158
This BusinessClass deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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.
Tue 6/26:57 pm
BOS
- SJO
2 stops18h 53m
GOL
Deal found 5/6![GOL logo]()
$165
This Air Canada deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 5/4![Air Canada logo]()
$177
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 5/271:37 pm
BOS
- SJO
1 stop11h 02m
United Airlines
Deal found 5/4![United Airlines logo]()
$177
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/96:51 am
BOS
- SJO
1 stop8h 24m
Delta
Deal found 5/4![Delta logo]()
$181
This Air Canada deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/56:55 pm
BOS
- LIR
1 stop19h 10m
Air Canada
Deal found 5/5![Air Canada logo]()
$182
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/93:54 pm
BOS
- SJO
1 stop20h 17m
United Airlines
Deal found 5/4![United Airlines logo]()
$192
This Air Canada deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:10 am
BOS
- LIR
1 stop8h 55m
Air Canada
Deal found 5/1![Air Canada logo]()
$194
This Air Canada deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/153:40 pm
BOS
- LIR
2 stops22h 25m
Air Canada
Deal found 5/2![Air Canada logo]()
$197
This American Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/186:53 pm
BOS
- SJO
2 stops18h 14m
American Airlines
Deal found 5/2![American Airlines logo]()
$201
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 5/246:40 pm
BOS
- LIR
2 stops17h 10m
United Airlines
Deal found 5/4![United Airlines logo]()
$202
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 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $339 (Avianca) |
One-way from | $145 (SmartFares) |
Popular in | December |
Cheapest in | October |
Average price | $449 |
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 6, 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
Tue 5/12
4:00 pm-10:00 am
1 stop20h 00m
San José Juan Santamaria Intl
Mon 5/25
8:47 am-11:08 pm
1 stop12h 21m
$344
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Tue 5/12
8:52 am-9:06 am
1 stop26h 14m
San José Juan Santamaria Intl
Thu 5/21
6:19 pm-11:08 pm
1 stop26h 49m
$344
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Tue 5/26
4:00 pm-8:21 am
1 stop18h 21m
San José Juan Santamaria Intl
Tue 6/2
4:10 am-11:08 pm
1 stop16h 58m
$344
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Wed 5/27
8:52 am-7:09 am
1 stop24h 17m
San José Juan Santamaria Intl
Wed 6/10
5:47 am-11:08 pm
1 stop15h 21m
$385
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Mon 6/1
4:00 pm-9:06 am
1 stop19h 06m
San José Juan Santamaria Intl
Thu 6/25
4:10 am-11:08 pm
1 stop16h 58m
$385
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Mon 6/1
4:00 pm-7:09 am
1 stop17h 09m
San José Juan Santamaria Intl
Wed 6/10
8:47 am-11:08 pm
1 stop12h 21m
$395
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Sat 5/30
8:52 am-7:09 am
1 stop24h 17m
San José Juan Santamaria Intl
Sat 6/13
5:57 pm-11:08 pm
1 stop27h 11m
$421
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Tue 7/7
3:57 pm-7:12 am
1 stop17h 15m
San José Juan Santamaria Intl
Thu 7/23
5:45 am-11:10 pm
1 stop15h 25m
$421
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Sun 6/21
4:00 pm-7:09 am
1 stop17h 09m
San José Juan Santamaria Intl
Mon 6/22
5:57 pm-2:44 pm
1 stop18h 47m
$436
BostonSan José
BOS - SJO
BOSSJO
Boston Logan Intl
Fri 6/19
8:52 am-9:06 am
1 stop26h 14m
San José Juan Santamaria Intl
Sun 6/28
5:47 am-11:08 pm
1 stop15h 21m
$469
Showing 1-10 of 43 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 $1,161). 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 6, 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
Food
7.2
Overall
7.9
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
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
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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 6, 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 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$497 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$141 | Average$391 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$159 | Average$505 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$159 | Average$453 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$178 | Average$377 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$251 | Average$503 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$287 | Average$527 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$289 | Average$446 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$316 | Average$546 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$381 | Average$847 | FlexibilityNo cancel fee | On-time62% |