$184+ Cheap flights from Boise (BOI) to Costa Rica
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SJO
Jun 20 — Jun 271
Round-trip
1 adult, Economy
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Find cheap flights from Boise 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 Boise to Costa RicaExplore the most affordable flight options available from Boise to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 21, 2026.
Explore the most affordable flight options available from Boise to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 21, 2026.
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.
Mon 5/187:33 pm
BOI
- SJO
2 stops13h 12m
Multiple Airlines
Thu 5/215:45 am
SJO
- BOI
2 stops17h 13m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$396
This Avianca 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/48:03 am
BOI
- SJO
2 stops15h 12m
Multiple Airlines
Tue 8/185:45 am
SJO
- BOI
2 stops17h 00m
Multiple Airlines
Deal found 5/17![Multiple Airlines logo]()
$426
This United Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:05 pm
BOI
- SJO
1 stop12h 10m
United Airlines
Sat 6/68:45 am
SJO
- BOI
1 stop12h 55m
United Airlines
Deal found 5/18![United Airlines logo]()
$430
This FlightHub deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/38:03 am
BOI
- SJO
2 stops15h 37m
Multiple Airlines
Sat 8/155:45 am
SJO
- BOI
2 stops17h 00m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$433
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:54 pm
BOI
- SJO
2 stops28h 39m
Alaska Airlines
Tue 6/212:53 am
SJO
- BOI
2 stops14h 41m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$435
This FlightHub deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:47 pm
BOI
- SJO
2 stops28h 28m
Multiple Airlines
Mon 9/145:05 am
SJO
- BOI
2 stops17h 55m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$441
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.
Tue 7/288:03 am
BOI
- SJO
2 stops15h 12m
Multiple Airlines
Tue 8/115:45 am
SJO
- BOI
2 stops17h 00m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$444
This Alaska Airlines deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” 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 5/306:54 pm
BOI
- SJO
2 stops28h 39m
Alaska Airlines
Fri 6/512:53 am
SJO
- BOI
2 stops34h 10m
Alaska Airlines
Deal found 5/20![Alaska Airlines logo]()
$445
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:54 pm
BOI
- SJO
2 stops52h 39m
Alaska Airlines
Tue 6/212:53 am
SJO
- BOI
2 stops14h 41m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$448
This FlightHub deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:03 am
BOI
- SJO
2 stops15h 37m
Multiple Airlines
Thu 8/205:45 am
SJO
- BOI
2 stops17h 15m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$450
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:51 pm
BOI
- LIR
1 stop11h 46m
Alaska Airlines
Thu 8/136:39 pm
LIR
- BOI
1 stop15h 33m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$555
This Alaska Airlines deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” 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 8/28:03 am
BOI
- LIR
1 stop22h 34m
Alaska Airlines
Thu 8/136:39 pm
LIR
- BOI
1 stop15h 33m
Alaska Airlines
Deal found 5/20![Alaska Airlines logo]()
$564
Best flights from Boise to Costa RicaDiscover carefully curated flight deals from Boise to Costa Rica that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 21, 2026.
Discover carefully curated flight deals from Boise to Costa Rica that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 21, 2026.
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:54 pm
BOI
- SJO
2 stops28h 39m
Alaska Airlines
Fri 6/512:53 am
SJO
- BOI
2 stops34h 10m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$449
This FlightHub deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/287:07 pm
BOI
- SJO
3 stops16h 38m
Multiple Airlines
Tue 8/115:45 am
SJO
- BOI
2 stops17h 00m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$502
This United Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:05 pm
BOI
- SJO
1 stop12h 10m
United Airlines
Mon 9/141:25 pm
SJO
- BOI
2 stops20h 10m
United Airlines
Deal found 5/19![United Airlines logo]()
$555
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/134:06 pm
BOI
- LIR
2 stops19h 16m
American Airlines
Tue 6/2312:35 pm
LIR
- BOI
2 stops22h 43m
American Airlines
Deal found 5/16![American Airlines logo]()
$713
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/307:33 pm
BOI
- SJO
1 stop28h 00m
Alaska Airlines
Sat 6/612:53 am
SJO
- BOI
2 stops47h 05m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$456
This Alaska Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/39:00 am
BOI
- SJO
2 stops13h 08m
Alaska Airlines
Wed 11/41:43 am
SJO
- BOI
2 stops20h 38m
Alaska Airlines
Deal found 5/19![Alaska Airlines logo]()
$511
This United Airlines deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:44 pm
BOI
- SJO
2 stops16h 41m
United Airlines
Tue 10/278:40 am
SJO
- BOI
1 stop10h 36m
United Airlines
Deal found 5/20![United Airlines logo]()
$575
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.
Mon 11/96:55 pm
BOI
- LIR
2 stops17h 15m
United Airlines
Thu 11/1912:50 pm
LIR
- BOI
1 stop9h 26m
United Airlines
Deal found 5/17![United Airlines logo]()
$580
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/307:33 pm
BOI
- SJO
1 stop28h 00m
Alaska Airlines
Mon 6/812:53 am
SJO
- BOI
2 stops23h 05m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$532
This United Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:05 pm
BOI
- LIR
2 stops17h 05m
United Airlines
Thu 10/11:20 pm
LIR
- BOI
2 stops20h 15m
United Airlines
Deal found 5/18![United Airlines logo]()
$585
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/102:55 pm
BOI
- LIR
2 stops20h 10m
American Airlines
Sat 10/172:10 pm
LIR
- BOI
2 stops22h 22m
American Airlines
Deal found 5/16![American Airlines logo]()
$738
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/45:57 am
BOI
- LIR
2 stops11h 32m
Alaska Airlines
Thu 8/136:39 pm
LIR
- BOI
1 stop15h 33m
Alaska Airlines
Deal found 5/17![Alaska Airlines logo]()
$583
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:51 pm
BOI
- LIR
1 stop11h 46m
Alaska Airlines
Tue 8/186:39 pm
LIR
- BOI
1 stop17h 54m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$628
This United Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/117:05 pm
BOI
- LIR
2 stops14h 45m
United Airlines
Sat 7/188:30 am
LIR
- BOI
1 stop13h 10m
United Airlines
Deal found 5/18![United Airlines logo]()
$745
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/78:03 am
BOI
- LIR
1 stop9h 26m
Alaska Airlines
Mon 8/176:39 pm
LIR
- BOI
1 stop15h 33m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$630
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:51 pm
BOI
- LIR
1 stop11h 46m
Alaska Airlines
Mon 8/176:39 pm
LIR
- BOI
2 stops19h 28m
Alaska Airlines
Deal found 5/17![Alaska Airlines logo]()
$635
This Alaska Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:51 pm
BOI
- LIR
1 stop11h 46m
Alaska Airlines
Tue 8/189:03 am
LIR
- BOI
1 stop13h 42m
Alaska Airlines
Deal found 5/19![Alaska Airlines logo]()
$687
Last-minute flights from Boise to Costa RicaDiscover last-minute flight deals from Boise to Costa Rica. Data last updated May 21, 2026 and is based on user searches.
Discover last-minute flight deals from Boise to Costa Rica. Data last updated May 21, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:05 pm
BOI
- SJO
1 stop12h 10m
United Airlines
Sat 6/68:45 am
SJO
- BOI
1 stop12h 55m
United Airlines
Deal found 5/18![United Airlines logo]()
$430
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/278:51 pm
BOI
- SJO
2 stops26h 42m
Alaska Airlines
Tue 6/212:53 am
SJO
- BOI
2 stops23h 05m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$475
This Avianca deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” 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.
Thu 5/288:38 am
BOI
- SJO
2 stops14h 37m
Multiple Airlines
Mon 6/15:05 am
SJO
- BOI
2 stops12h 38m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$478
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:54 pm
BOI
- SJO
2 stops52h 39m
Alaska Airlines
Tue 6/212:53 am
SJO
- BOI
2 stops14h 41m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$448
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:54 pm
BOI
- SJO
2 stops52h 39m
Alaska Airlines
Sat 6/612:53 am
SJO
- BOI
2 stops47h 05m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$462
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:54 pm
BOI
- SJO
2 stops28h 39m
Alaska Airlines
Tue 6/212:53 am
SJO
- BOI
2 stops14h 41m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$435
This Alaska Airlines deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” 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 5/306:54 pm
BOI
- SJO
2 stops28h 39m
Alaska Airlines
Fri 6/512:53 am
SJO
- BOI
2 stops34h 10m
Alaska Airlines
Deal found 5/20![Alaska Airlines logo]()
$445
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/307:33 pm
BOI
- SJO
1 stop28h 00m
Alaska Airlines
Sat 6/612:53 am
SJO
- BOI
2 stops47h 05m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$456
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:54 pm
BOI
- SJO
2 stops28h 39m
Alaska Airlines
Wed 6/312:53 am
SJO
- BOI
1 stop22h 05m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$483
This American Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:57 pm
BOI
- LIR
2 stops19h 21m
American Airlines
Fri 6/53:37 pm
LIR
- BOI
1 stop19h 41m
American Airlines
Deal found 5/19![American Airlines logo]()
$781
This American Airlines deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/123:12 pm
BOI
- LIR
1 stop22h 07m
American Airlines
Wed 6/172:45 pm
LIR
- BOI
2 stops20h 33m
American Airlines
Deal found 5/20![American Airlines logo]()
$706
This American Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/134:06 pm
BOI
- LIR
1 stop22h 31m
American Airlines
Tue 6/2312:35 pm
LIR
- BOI
2 stops22h 43m
American Airlines
Deal found 5/18![American Airlines logo]()
$661
One-way flights from Boise to Costa RicaSearch for one-way flight options from Boise to Costa Rica. Find affordable one-way fares based on user searches. Data last updated May 21, 2026.
Search for one-way flight options from Boise to Costa Rica. Find affordable one-way fares based on user searches. Data last updated May 21, 2026.
This Avianca deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/56:57 pm
BOI
- SJO
2 stops13h 48m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$184
This Avianca deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” 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.
Thu 5/288:38 am
BOI
- SJO
2 stops14h 37m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$188
This eDestinos deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/258:38 am
BOI
- SJO
2 stops15h 02m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$194
This FlightHub deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/48:03 am
BOI
- SJO
2 stops15h 12m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$203
This American Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/33:53 pm
BOI
- SJO
2 stops21h 18m
American Airlines
Deal found 5/18![American Airlines logo]()
$248
This Justfly.com deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:51 pm
BOI
- SJO
2 stops28h 24m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$252
This deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/57:05 pm
BOI
- SJO
1 stop12h 10m
United Airlines
Deal found 5/20![United Airlines logo]()
$254
This United Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/256:30 am
BOI
- SJO
2 stops40h 09m
United Airlines
Deal found 5/18![United Airlines logo]()
$255
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.
Sun 6/285:46 pm
BOI
- SJO
2 stops16h 25m
United Airlines
Deal found 5/16![United Airlines logo]()
$258
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:51 pm
BOI
- LIR
1 stop11h 46m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$274
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:51 pm
BOI
- LIR
1 stop11h 46m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$294
This Alaska Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/26:13 pm
BOI
- LIR
2 stops12h 24m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$297
Find flight deals from Boise to Costa Rica
Keep the following information in mind while searching for Boise to Costa Rica flight deals. Data was last updated May 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $426 (Avianca) |
One-way from | $184 (Avianca) |
Popular in | December |
Cheapest in | January |
Average price | $604 |
Cheapflights Fare Finder
Customize your flight search to find flights from Boise 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 21, 2026.
Use the filters below to find and compare flights from Boise to Costa Rica that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BoiseSan José
BOI - SJO
BOISJO
Boise Air Term. Gowen Fld
Sat 5/30
6:54 pm-11:33 pm
2 stops28h 39m
San José Juan Santamaria Intl
Fri 6/5
12:53 am-11:03 am
2 stops34h 10m
$449
BoiseSan José
BOI - SJO
BOISJO
Boise Air Term. Gowen Fld
Sat 5/30
7:33 pm-11:33 pm
1 stop28h 00m
San José Juan Santamaria Intl
Sat 6/6
12:53 am-11:58 pm
2 stops47h 05m
$456
BoiseSan José
BOI - SJO
BOISJO
Boise Air Term. Gowen Fld
Tue 7/28
7:07 pm-11:45 am
3 stops16h 38m
San José Juan Santamaria Intl
Tue 8/11
5:45 am-10:45 pm
2 stops17h 00m
$502
BoiseSan José
BOI - SJO
BOISJO
Boise Air Term. Gowen Fld
Tue 11/3
9:00 am-11:08 pm
2 stops13h 08m
San José Juan Santamaria Intl
Wed 11/4
1:43 am-9:21 pm
2 stops20h 38m
$511
BoiseSan José
BOI - SJO
BOISJO
Boise Air Term. Gowen Fld
Sat 5/30
7:33 pm-11:33 pm
1 stop28h 00m
San José Juan Santamaria Intl
Mon 6/8
12:53 am-11:58 pm
2 stops23h 05m
$532
BoiseSan José
BOI - SJO
BOISJO
Boise Air Term. Gowen Fld
Fri 9/4
7:05 pm-7:15 am
1 stop12h 10m
San José Juan Santamaria Intl
Mon 9/14
1:25 pm-9:35 am
2 stops20h 10m
$555
BoiseSan José
BOI - SJO
BOISJO
Boise Air Term. Gowen Fld
Sat 10/24
5:44 pm-10:25 am
2 stops16h 41m
San José Juan Santamaria Intl
Tue 10/27
8:40 am-7:16 pm
1 stop10h 36m
$575
BoiseLiberia
BOI - LIR
BOILIR
Boise Air Term. Gowen Fld
Mon 11/9
6:55 pm-1:10 pm
2 stops17h 15m
Liberia
Thu 11/19
12:50 pm-9:16 pm
1 stop9h 26m
$580
BoiseLiberia
BOI - LIR
BOILIR
Boise Air Term. Gowen Fld
Tue 8/4
5:57 am-5:29 pm
2 stops11h 32m
Liberia
Thu 8/13
6:39 pm-10:12 am
1 stop15h 33m
$583
BoiseLiberia
BOI - LIR
BOILIR
Boise Air Term. Gowen Fld
Mon 9/28
7:05 pm-12:10 pm
2 stops17h 05m
Liberia
Thu 10/1
1:20 pm-9:35 am
2 stops20h 15m
$585
Showing 1-10 of 28 resultsSorted by cheapest first
Best time to book a flight from Boise to Costa Rica
Have a flexible travel schedule? Discover the best time to fly to Costa Rica from Boise with our price prediction graph.
BOI-SJO
BOI-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 Boise to Costa Rica
BOI-CR0
BOI-SJO
BOI-LIR
What is the cheapest month to book a flight from Boise to Costa Rica?
Currently, October is the cheapest month in which you can book a flight from Boise to Costa Rica (average of $141). Flying from Boise to Costa Rica in June is currently the most expensive (average of $440). 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.
How far ahead should I book a flight from Boise to Costa Rica?
The best time to book flights from Boise to Costa Rica is 52 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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 21, 2026.
Get a feel of what it's like to fly with Alaska Airlines,Southwest, andDelta from Boise to Costa Rica by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Entertainment
7.0
Food
7.0
Comfort
7.8
Overall
7.9
Crew
8.5
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Boarding
8.1
Entertainment
7.0
Food
7.0
Comfort
7.8
Overall
7.9
Crew
8.5
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Boarding
8.1
Entertainment
7.0
Food
7.0
Comfort
7.8
Overall
7.9
Crew
8.5
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Boarding
8.1
Entertainment
7.0
Food
7.0
Comfort
7.8
Overall
7.9
Crew
8.5
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Boarding
8.1
Entertainment
7.0
Food
7.0
Comfort
7.8
Overall
7.9
Crew
8.5
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Boarding
8.1
Entertainment
7.0
Food
7.0
Comfort
7.8
Overall
7.9
Crew
8.5
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Related info for your journey
Find useful and relevant information for your journey from Boise 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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Alternative routes for Boise to Costa Rica
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Complete your trip
Complete your trip to Costa Rica by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from Boise to Costa Rica, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boise and Costa Rica flights
Browse other Boise and Costa Rica flight options. Last updated on May 21, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 5 airlines flying from Boise to Costa Rica
Discover the top 5 airlines that operate flights from Boise 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 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$141 | Average$815 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$279 | Average$474 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$315 | Average$532 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$376 | Average$621 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$477 | Average$698 | FlexibilityNo cancel fee | On-time63% |