$375+ Cheap flights from Boise (BOI) to San Juan
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Boise Air Term. Gowen Fld to San Juan are usually found in October or September, booked 60 days in advance, depart on a Monday or Thursday and return on a Monday
Cheap 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 25, 2025.
Round-trip from | $375 (Delta) |
|---|---|
Popular in | December |
Cheapest in | October |
Average price | $658 |
Find flight deals from Boise to San Juan
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 25, 2025.
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 25, 2025.
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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.
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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.
This Southwest deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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.
This United Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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.
This Mytrip deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Alaska Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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.
Cheapflights Fare Finder
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
Price
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Thu 9/25
11:35 pm-1:16 pm
1 stop11h 41m
San Juan Luis Munoz Marin Intl
Tue 9/30
7:00 am-11:57 pm
2 stops18h 57m
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Sun 9/21
2:16 pm-11:04 am
2 stops18h 48m
San Juan Luis Munoz Marin Intl
Sun 9/28
2:48 pm-8:21 pm
2 stops31h 33m
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Sat 9/6
7:00 am-11:37 pm
2 stops14h 37m
San Juan Luis Munoz Marin Intl
Sat 9/13
6:10 am-9:48 pm
2 stops17h 38m
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Thu 9/25
6:15 am-8:45 pm
2 stops12h 30m
San Juan Luis Munoz Marin Intl
Tue 9/30
8:00 am-10:25 pm
2 stops16h 25m
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Wed 9/24
7:09 pm-12:00 pm
2 stops14h 51m
San Juan Luis Munoz Marin Intl
Sun 9/28
1:05 am-1:33 pm
2 stops14h 28m
BoiseSan Juan
BOI - SJU
BOISJU
Boise Air Term. Gowen Fld
Sun 8/10
5:50 pm-12:02 pm
3 stops40h 12m
San Juan Luis Munoz Marin Intl
Sat 8/16
10:10 am-5:11 pm
3 stops33h 01m
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.
Cheapflights Insights
Everything you need to know about your flight from Boise to San Juan
How far ahead should I book a flight from Boise to San Juan?
Use this chart to determine the optimal time to book a round-trip flight from Boise to San Juan. Price data was last updated on July 18, 2025.
The best time to book flights from Boise to San Juan is 59 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.
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 $254). Flying from Boise to San Juan in June is currently the most expensive (average of $339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from BOI to SJU?
Find hourly flight availability from Boise to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 25, 2025.
When flying from Boise to San Juan, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 29% versus a flight in the morning.
What is the cheapest day to fly from Boise to San Juan?
Use this chart to determine the cheapest time to fly round-trip from Boise to San Juan. Price data was last updated on December 16, 2024.
Travelers seeking maximum savings on their Boise to San Juan flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
How much does it cost to fly round-trip from Boise to San Juan?
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 25, 2025.
See what other customers who have flown with Southwest, Delta, and United 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.
Comfort
Food
Entertainment
Boarding
Crew
Overall
Reviews
John,May 2025
PVD - BNA
Comfort
Food
Entertainment
Boarding
Crew
Overall
Reviews
John,May 2025
PVD - BNA
Comfort
Food
Entertainment
Boarding
Crew
Overall
Reviews
John,May 2025
PVD - BNA
Comfort
Food
Entertainment
Boarding
Crew
Overall
Reviews
John,May 2025
PVD - BNA
Comfort
Food
Entertainment
Boarding
Crew
Overall
Reviews
John,May 2025
PVD - BNA
Comfort
Food
Entertainment
Boarding
Crew
Overall
Reviews
John,May 2025
PVD - BNA
Related info for your journey
Find useful and relevant information for your journey from Boise to San Juan. 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 San Juan
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Boise to San Juan
Discover the top 5 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 25, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$253 | Average$415 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$384 | Average$551 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$501 | Average$665 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$504 | Average$709 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$530 | Average$755 | FlexibilityNo cancel fee | On-time71% |