$218+ Cheap flights from Boise (BOI) to San Juan
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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SJU
Aug 22 — Aug 291
Round-trip
1 adult, Economy
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Find cheap flights from Boise to San Juan 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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Best
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Cheapest flights from Boise to San JuanExplore the most affordable flight options available from Boise to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 23, 2026.
Explore the most affordable flight options available from Boise to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 23, 2026.
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/227:05 pm
BOI
- SJU
2 stops16h 48m
United Airlines
Mon 9/282:00 pm
SJU
- BOI
1 stop9h 35m
United Airlines
Deal found 7/23![United Airlines logo]()
$436
This Southwest deal was found by Cheapflights users on 7/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:25 am
BOI
- SJU
2 stops12h 40m
Southwest
Wed 8/261:45 pm
SJU
- BOI
2 stops11h 25m
Southwest
Deal found 7/20![Southwest logo]()
$451
This Southwest deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2011:30 am
BOI
- SJU
2 stops10h 20m
Southwest
Thu 8/275:00 am
SJU
- BOI
2 stops13h 15m
Southwest
Deal found 7/22![Southwest logo]()
$481
This Southwest deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:25 am
BOI
- SJU
2 stops12h 40m
Southwest
Mon 9/285:00 am
SJU
- BOI
2 stops13h 15m
Southwest
Deal found 7/21![Southwest logo]()
$496
This Southwest deal was found by Cheapflights users on 7/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:55 am
BOI
- SJU
2 stops13h 50m
Southwest
Sun 11/155:35 am
SJU
- BOI
2 stops13h 30m
Southwest
Deal found 7/19![Southwest logo]()
$512
This United Airlines deal was found by Cheapflights users on 7/19. 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.
Sun 11/15:00 am
BOI
- SJU
2 stops13h 00m
United Airlines
Fri 11/62:21 pm
SJU
- BOI
1 stop10h 09m
United Airlines
Deal found 7/19![United Airlines logo]()
$526
This Delta deal was found by Cheapflights users on 7/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/167:13 pm
BOI
- SJU
2 stops17h 48m
Delta
Fri 10/237:00 am
SJU
- BOI
2 stops13h 33m
Delta
Deal found 7/19![Delta logo]()
$536
This American Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:02 pm
BOI
- SJU
2 stops17h 44m
American Airlines
Sat 10/176:00 am
SJU
- BOI
1 stop9h 51m
American Airlines
Deal found 7/22![American Airlines logo]()
$538
This Southwest deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/105:50 am
BOI
- SJU
2 stops13h 05m
Southwest
Mon 12/145:45 am
SJU
- BOI
2 stops12h 25m
Southwest
Deal found 7/23![Southwest logo]()
$539
This American Airlines deal was found by Cheapflights users on 7/20. 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.
Wed 8/195:19 pm
BOI
- SJU
2 stops14h 24m
American Airlines
Tue 8/2512:55 am
SJU
- BOI
1 stop15h 34m
American Airlines
Deal found 7/20![American Airlines logo]()
$543
This American Airlines deal was found by Cheapflights users on 7/19. 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.
Fri 9/42:49 pm
BOI
- SJU
2 stops16h 54m
American Airlines
Mon 9/712:55 am
SJU
- BOI
1 stop15h 34m
American Airlines
Deal found 7/19![American Airlines logo]()
$547
Best flights from Boise to San JuanDiscover carefully curated flight deals from Boise to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 23, 2026.
Discover carefully curated flight deals from Boise to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 23, 2026.
This United Airlines deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/227:05 pm
BOI
- SJU
2 stops14h 52m
United Airlines
Mon 9/282:00 pm
SJU
- BOI
1 stop9h 35m
United Airlines
Deal found 7/21![United Airlines logo]()
$436
This Southwest deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2011:30 am
BOI
- SJU
2 stops10h 20m
Southwest
Thu 8/275:00 am
SJU
- BOI
2 stops13h 15m
Southwest
Deal found 7/22![Southwest logo]()
$481
This Delta deal was found by Cheapflights users on 7/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/63:36 pm
BOI
- SJU
2 stops18h 20m
Delta
Fri 11/133:35 pm
SJU
- BOI
1 stop10h 06m
Delta
Deal found 7/19![Delta logo]()
$536
This Southwest deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:25 am
BOI
- SJU
2 stops12h 40m
Southwest
Mon 9/285:00 am
SJU
- BOI
2 stops13h 15m
Southwest
Deal found 7/21![Southwest logo]()
$496
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” 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 9/217:05 pm
BOI
- SJU
2 stops16h 48m
United Airlines
Thu 9/242:00 pm
SJU
- BOI
1 stop9h 35m
United Airlines
Deal found 7/23![United Airlines logo]()
$526
This United Airlines deal was found by Cheapflights users on 7/19. 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 9/256:25 am
BOI
- SJU
1 stop9h 13m
United Airlines
Thu 10/11:00 am
SJU
- BOI
2 stops14h 38m
United Airlines
Deal found 7/19![United Airlines logo]()
$526
This Delta deal was found by Cheapflights users on 7/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2511:10 pm
BOI
- SJU
1 stop10h 35m
Delta
Fri 10/212:55 pm
SJU
- BOI
1 stop11h 05m
Delta
Deal found 7/19![Delta logo]()
$581
This Southwest deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/105:50 am
BOI
- SJU
2 stops13h 05m
Southwest
Mon 12/145:45 am
SJU
- BOI
2 stops12h 25m
Southwest
Deal found 7/23![Southwest logo]()
$539
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/195:00 am
BOI
- SJU
1 stop10h 38m
United Airlines
Tue 9/221:00 am
SJU
- BOI
2 stops12h 26m
United Airlines
Deal found 7/23![United Airlines logo]()
$566
Last-minute flights from Boise to San JuanDiscover last-minute flight deals from Boise to San Juan. Data last updated July 23, 2026 and is based on user searches.
Discover last-minute flight deals from Boise to San Juan. Data last updated July 23, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 7/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2310:25 am
BOI
- SJU
2 stops13h 00m
Southwest
Sat 7/257:00 am
SJU
- BOI
2 stops12h 20m
Southwest
Deal found 7/19![Southwest logo]()
$662
This United Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 7/242:41 pm
BOI
- SJU
2 stops12h 48m
United Airlines
Wed 8/261:00 am
SJU
- BOI
2 stops12h 28m
United Airlines
Deal found 7/22![United Airlines logo]()
$569
This American Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 7/248:11 am
BOI
- SJU
2 stops13h 37m
American Airlines
Wed 8/2612:55 am
SJU
- BOI
1 stop15h 34m
American Airlines
Deal found 7/22![American Airlines logo]()
$620
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” 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 8/75:00 am
BOI
- SJU
1 stop10h 38m
United Airlines
Mon 8/102:05 am
SJU
- BOI
2 stops15h 26m
United Airlines
Deal found 7/23![United Airlines logo]()
$656
This Southwest deal was found by Cheapflights users on 7/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:25 am
BOI
- SJU
2 stops12h 40m
Southwest
Wed 8/261:45 pm
SJU
- BOI
2 stops11h 25m
Southwest
Deal found 7/20![Southwest logo]()
$451
This American Airlines deal was found by Cheapflights users on 7/20. 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.
Wed 8/195:19 pm
BOI
- SJU
2 stops14h 24m
American Airlines
Tue 8/2512:55 am
SJU
- BOI
1 stop15h 34m
American Airlines
Deal found 7/20![American Airlines logo]()
$543
This United Airlines deal was found by Cheapflights users on 7/20. 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.
Wed 8/196:30 am
BOI
- SJU
2 stops15h 20m
United Airlines
Tue 8/251:00 am
SJU
- BOI
3 stops14h 38m
United Airlines
Deal found 7/20![United Airlines logo]()
$633
This Southwest deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2011:30 am
BOI
- SJU
2 stops10h 20m
Southwest
Thu 8/275:00 am
SJU
- BOI
2 stops13h 15m
Southwest
Deal found 7/22![Southwest logo]()
$481
This American Airlines deal was found by Cheapflights users on 7/20. 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.
Thu 8/208:01 am
BOI
- SJU
2 stops13h 58m
American Airlines
Wed 8/2612:55 am
SJU
- BOI
1 stop15h 34m
American Airlines
Deal found 7/20![American Airlines logo]()
$538
One-way flights from Boise to San JuanSearch for one-way flight options from Boise to San Juan. Find affordable one-way fares based on user searches. Data last updated July 23, 2026.
Search for one-way flight options from Boise to San Juan. Find affordable one-way fares based on user searches. Data last updated July 23, 2026.
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:49 am
BOI
- SJU
2 stops13h 40m
Delta
Deal found 7/23![Delta logo]()
$218
This United Airlines deal was found by Cheapflights users on 7/20. 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 8/155:00 am
BOI
- SJU
2 stops13h 38m
United Airlines
Deal found 7/20![United Airlines logo]()
$263
This Delta deal was found by Cheapflights users on 7/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:10 pm
BOI
- SJU
1 stop12h 32m
Delta
Deal found 7/20![Delta logo]()
$268
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/181:24 pm
BOI
- SJU
2 stops33h 32m
Frontier
Deal found 7/20![Frontier logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/161:24 pm
BOI
- SJU
2 stops33h 17m
Frontier
Deal found 7/20![Frontier logo]()
$313
This Southwest deal was found by Cheapflights users on 7/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:25 am
BOI
- SJU
2 stops12h 40m
Southwest
Deal found 7/20![Southwest logo]()
$328
This American Airlines deal was found by Cheapflights users on 7/20. 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.
Wed 8/195:19 pm
BOI
- SJU
2 stops20h 52m
American Airlines
Deal found 7/20![American Airlines logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/163:14 pm
BOI
- SJU
3 stops33h 01m
Multiple Airlines
Deal found 7/20![Multiple Airlines logo]()
$406
This American Airlines deal was found by Cheapflights users on 7/20. 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.
Tue 8/183:19 pm
BOI
- SJU
1 stop29h 56m
American Airlines
Deal found 7/20![American Airlines logo]()
$425
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/152:14 pm
BOI
- SJU
3 stops22h 02m
Multiple Airlines
Deal found 7/20![Multiple Airlines logo]()
$436
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:23 am
BOI
- SJU
3 stops28h 16m
Multiple Airlines
Deal found 7/20![Multiple Airlines logo]()
$453
Find flight deals from Boise to San Juan
Discover tips and strategies to find the most affordable flight options for your journey from Boise (BOI) to San Juan (PR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 23, 2026.
Round-trip from | $436 (United Airlines) |
|---|---|
One-way from | $218 (Delta) |
Popular in | November |
Cheapest in | September |
Average price | $828 |
Cheapflights Fare Finder
Customize your flight search to find flights from Boise to San Juan 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 July 23, 2026.
Use the filters below to find and compare flights from Boise to San Juan that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Tue 9/22
7:05 pm-11:57 am
2 stops14h 52m
San Juan Luis Munoz Marin Intl
Mon 9/28
2:00 pm-9:35 pm
1 stop9h 35m
$436
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Thu 8/20
11:30 am-11:50 pm
2 stops10h 20m
San Juan Luis Munoz Marin Intl
Thu 8/27
5:00 am-4:15 pm
2 stops13h 15m
$481
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Tue 9/22
6:25 am-9:05 pm
2 stops12h 40m
San Juan Luis Munoz Marin Intl
Mon 9/28
5:00 am-4:15 pm
2 stops13h 15m
$496
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Mon 9/21
7:05 pm-1:53 pm
2 stops16h 48m
San Juan Luis Munoz Marin Intl
Thu 9/24
2:00 pm-9:35 pm
1 stop9h 35m
$526
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Fri 9/25
6:25 am-5:38 pm
1 stop9h 13m
San Juan Luis Munoz Marin Intl
Thu 10/1
1:00 am-1:38 pm
2 stops14h 38m
$526
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Fri 11/6
3:36 pm-12:56 pm
2 stops18h 20m
San Juan Luis Munoz Marin Intl
Fri 11/13
3:35 pm-10:41 pm
1 stop10h 06m
$536
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Thu 12/10
5:50 am-9:55 pm
2 stops13h 05m
San Juan Luis Munoz Marin Intl
Mon 12/14
5:45 am-3:10 pm
2 stops12h 25m
$539
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Sat 9/19
5:00 am-5:38 pm
1 stop10h 38m
San Juan Luis Munoz Marin Intl
Tue 9/22
1:00 am-11:26 am
2 stops12h 26m
$566
Quickest round-trip
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Fri 9/25
11:10 pm-11:45 am
1 stop10h 35m
San Juan Luis Munoz Marin Intl
Fri 10/2
12:55 pm-10:00 pm
1 stop11h 05m
$581
Cheapest one-way
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Wed 9/2
6:49 am-10:29 pm
2 stops13h 40m
$218
Showing 1-10 of 17 resultsSorted by cheapest first
Best time to book a flight from Boise to San Juan
Have a flexible travel schedule? Discover the best time to fly to San Juan from Boise with our price prediction graph.
BOI-PR1
BOI-SJU
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 San Juan
BOI-PR1
BOI-SJU
What is the cheapest month to book a flight from Boise to San Juan?
Currently, September is the cheapest month in which you can book a flight from Boise to San Juan (average of $526). Flying from Boise to San Juan in November is currently the most expensive (average of $896). 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 much does it cost to fly round-trip from Boise to San Juan?
Airfare is below average for this route at the moment.
Boise to San Juan flights typically cost between $532 and $770 in September.The cheapest round-trip price found within the last 5 days was $436 on United Airlines (Sep 22-Sep 28).
Reviews of airlines servicing San Juan
Get insights into the airlines that provide service to San Juan. 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 San Juan. Reviews last updated July 23, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Boise to San Juan have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Related info for your journey
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Top 4 airlines flying from Boise to San Juan
Discover the top 4 airlines that operate flights from Boise to San Juan. 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 July 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$338 | Average$581 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$429 | Average$793 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$452 | Average$582 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$499 | Average$654 | FlexibilityNo cancel fee | On-time71% |