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San Juan

$303+ 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 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SJU
maalis 5 — maalis 121
to 3/5
to 3/12
1 adult, Economy
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Cheap flight deals from Boise to San Juan

Cheapest flights from Boise to San Juan
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 helmikuu 3, 2026.

This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ti 10/275:45 pm
BOI
-
SJU
2 stops16h 11m
Delta
la 10/3112:46 pm
SJU
-
BOI
2 stops12h 49m
Delta
Deal found 2/3$416
This Southwest deal was found by Cheapflights users on 2/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ma 5/46:55 pm
BOI
-
SJU
2 stops13h 40m
Southwest
ma 5/1810:00 am
SJU
-
BOI
2 stops16h 45m
Southwest
Deal found 2/2$430
This American Airlines deal was found by Cheapflights users on 2/1. 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.
ma 3/236:33 pm
BOI
-
SJU
2 stops12h 27m
American Airlines
ti 3/316:33 am
SJU
-
BOI
1 stop17h 50m
American Airlines
Deal found 2/1$499
This United Airlines deal was found by Cheapflights users on 1/31. 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.
ma 3/26:55 pm
BOI
-
SJU
2 stops16h 45m
United Airlines
ke 3/48:30 am
SJU
-
BOI
2 stops16h 02m
United Airlines
Deal found 1/31$506
This American Airlines deal was found by Cheapflights users on 2/2. 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.
la 3/71:41 pm
BOI
-
SJU
2 stops16h 19m
American Airlines
ti 3/101:30 am
SJU
-
BOI
1 stop13h 18m
American Airlines
Deal found 2/2$519
This American Airlines deal was found by Cheapflights users on 2/2. 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.
ke 2/187:00 am
BOI
-
SJU
1 stop13h 31m
American Airlines
ti 3/37:00 am
SJU
-
BOI
2 stops18h 22m
American Airlines
Deal found 2/2$529
This American Airlines deal was found by Cheapflights users on 2/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ke 7/296:44 am
BOI
-
SJU
1 stop14h 32m
American Airlines
la 8/112:59 am
SJU
-
BOI
1 stop15h 09m
American Airlines
Deal found 2/3$559
This Southwest deal was found by Cheapflights users on 2/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ke 3/1811:10 am
BOI
-
SJU
2 stops11h 05m
Southwest
ke 3/256:40 am
SJU
-
BOI
2 stops17h 40m
Southwest
Deal found 2/2$566

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 helmikuu 3, 2026.

Round-trip from

$416
(United Airlines)

One-way from

$303
(American Airlines)

Popular in

March

Cheapest in

September

Average price

$560
From Boise Air Term. Gowen Fld to San Juan
Search Deals
One-way flight from Boise Air Term. Gowen Fld to San Juan
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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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 helmikuu 3, 2026.
Use the filters below to find and compare flights from Boise to San Juan that are best for you.

Fly from

Boise

Fly to

San Juan

Route

Depart

Return

Price

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

ti 5/5

6:00 am-9:05 pm

2 stops13h 05m

San Juan Luis Munoz Marin Intl

ti 5/12

5:05 am-7:00 pm

2 stops15h 55m

$416

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

ma 3/23

6:33 pm-9:00 am

2 stops12h 27m

San Juan Luis Munoz Marin Intl

ti 3/31

6:33 am-10:23 pm

1 stop17h 50m

$499

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

ti 5/5

8:34 am-8:34 pm

1 stop10h 00m

San Juan Luis Munoz Marin Intl

ti 5/12

1:40 pm-9:17 pm

1 stop9h 37m

$499

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

ma 3/2

6:55 pm-2:40 pm

2 stops16h 45m

San Juan Luis Munoz Marin Intl

ke 3/4

8:30 am-9:32 pm

2 stops16h 02m

$506

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

la 2/28

1:30 pm-5:24 am

1 stop12h 54m

San Juan Luis Munoz Marin Intl

ke 3/4

7:00 am-10:22 pm

2 stops18h 22m

$529

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

ke 7/29

4:05 pm-4:32 am

1 stop10h 27m

San Juan Luis Munoz Marin Intl

la 8/1

12:59 am-2:08 pm

1 stop15h 09m

$559

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

ti 2/17

1:35 pm-10:00 am

2 stops17h 25m

$303

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

ti 2/17

8:12 pm-11:09 pm

3 stops47h 57m

$511

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

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.
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

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 January 30, 2026.

The best time to book flights from Boise to San Juan is 58 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, June is the cheapest month in which you can book a flight from Boise to San Juan (average of $220). Flying from Boise to San Juan in August is currently the most expensive (average of $501). 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 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 helmikuu 3, 2026.
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.
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,272 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,138 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,236 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,216 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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.

  • What airport do you fly from for flights from Boise to San Juan?

    For a flight from Boise to San Juan, you will be flying from Air Term. Gowen Fld. Boise Air Term. Gowen Fld (BOI) is just 3.3 mi from the center of the city. Air Term. Gowen Fld is the only Boise airport and it handles 0 outbound flights to San Juan per day. 4 airlines have flights to San Juan from Boise Air Term. Gowen Fld on a regular basis.

  • How long is the flight from Boise to San Juan?

    There are many flights that can get you from Boise to San Juan in 10h. Fly via Southwest, American Airlines, or United Airlines to get the fastest option. The distance from Boise to San Juan is about 3374 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Boise to San Juan round-trip?

    Delta, at $234, was found to be the cheapest airline from Boise to San Juan.Alternate airlines to your destination round-trip include United Airlines and Southwest. Delta is priced at 61% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Boise to San Juan that include hotel bookings?

    Yes. In addition to deals on Boise to San Juan flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boise to San Juan?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boise to San Juan.

  • Can I find deals for business class flights from Boise to San Juan?

    Yes. Cheapflights offers flight deals from Boise to San Juan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boise to San Juan?

    Currently, June is the cheapest month in which you can book a flight from Boise to San Juan (average of $220). Flying from Boise to San Juan in August is currently the most expensive (average of $501). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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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.
Boise to Luis Munoz Marin Intl flights
Spokane to Luis Munoz Marin Intl flights
Boise to Vieques flights

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 helmikuu 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$234Average$560FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$442Average$718FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$480Average$641FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$499Average$665FlexibilityNo cancel feeOn-time71%

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