San Juan

$308+ 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 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SJU
Jun 20 — Jun 271
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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 May 21, 2026.

This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2811:30 pm
BOI
-
SJU
1 stop11h 46m
Delta
Thu 10/12:26 pm
SJU
-
BOI
1 stop10h 06m
Delta
Deal found 5/18$526
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.
Sat 10/316:44 am
BOI
-
SJU
1 stop14h 49m
American Airlines
Sat 11/76:44 am
SJU
-
BOI
1 stop18h 19m
American Airlines
Deal found 5/20$542
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:20 pm
BOI
-
SJU
2 stops17h 28m
American Airlines
Fri 8/1412:59 am
SJU
-
BOI
1 stop14h 57m
American Airlines
Deal found 5/17$552
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:55 am
BOI
-
SJU
2 stops11h 20m
Southwest
Sun 11/85:35 am
SJU
-
BOI
2 stops13h 30m
Southwest
Deal found 5/17$596
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:10 pm
BOI
-
SJU
1 stop9h 23m
American Airlines
Mon 10/267:00 pm
SJU
-
BOI
2 stops18h 26m
American Airlines
Deal found 5/17$609
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.
Mon 10/266:55 pm
BOI
-
SJU
2 stops16h 45m
United Airlines
Fri 10/307:10 am
SJU
-
BOI
2 stops16h 06m
United Airlines
Deal found 5/20$616
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 10/195:00 am
BOI
-
SJU
1 stop10h 38m
United Airlines
Mon 10/261:25 pm
SJU
-
BOI
1 stop9h 51m
United Airlines
Deal found 5/17$630
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.
Mon 7/66:30 am
BOI
-
SJU
1 stop9h 08m
United Airlines
Tue 7/71:40 pm
SJU
-
BOI
1 stop10h 57m
United Airlines
Deal found 5/19$654
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.
Sat 10/1712:10 pm
BOI
-
SJU
1 stop9h 23m
American Airlines
Sat 10/246:00 am
SJU
-
BOI
1 stop18h 17m
American Airlines
Deal found 5/20$656
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.
Wed 7/291:57 pm
BOI
-
SJU
2 stops12h 42m
American Airlines
Sat 8/112:58 am
SJU
-
BOI
1 stop12h 22m
American Airlines
Deal found 5/20$659
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/37:10 am
BOI
-
SJU
2 stops12h 20m
Southwest
Mon 7/65:30 am
SJU
-
BOI
2 stops13h 45m
Southwest
Deal found 5/18$666

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 May 21, 2026.

Round-trip from

$526
(Delta)

One-way from

$308
(United Airlines)

Popular in

November

Cheapest in

September

Average price

$662
From Boise Air Term. Gowen Fld to San Juan
One-way flight from Boise Air Term. Gowen Fld to San Juan
Highest demand for flights based on searches. 4% potential increase in price ($29 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Average for round-trip flights in May 2026

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 May 21, 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

Price

Cheapest round-trip

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Sat 10/31

5:45 pm-2:21 pm

2 stops18h 36m

San Juan Luis Munoz Marin Intl

Sat 11/7

5:18 pm-11:55 pm

1 stop9h 37m

$526

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Thu 11/12

7:30 am-8:45 pm

2 stops10h 15m

San Juan Luis Munoz Marin Intl

Sun 11/22

6:05 am-4:05 pm

2 stops13h 00m

$526

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Sat 10/17

7:05 pm-12:34 pm

2 stops15h 29m

San Juan Luis Munoz Marin Intl

Fri 10/23

1:00 am-12:02 pm

2 stops13h 02m

$526

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Tue 11/3

7:55 am-10:15 pm

2 stops11h 20m

San Juan Luis Munoz Marin Intl

Sun 11/8

5:35 am-4:05 pm

2 stops13h 30m

$596

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Mon 10/26

6:55 pm-1:40 pm

2 stops16h 45m

San Juan Luis Munoz Marin Intl

Fri 10/30

1:25 pm-9:16 pm

1 stop9h 51m

$616

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Tue 11/3

2:06 pm-5:30 am

2 stops12h 24m

San Juan Luis Munoz Marin Intl

Sun 11/8

6:44 am-10:03 pm

1 stop18h 19m

$659

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Fri 7/3

7:10 am-9:30 pm

2 stops12h 20m

San Juan Luis Munoz Marin Intl

Mon 7/6

5:30 am-5:15 pm

2 stops13h 45m

$666

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Thu 7/9

10:25 am-1:20 am

2 stops12h 55m

San Juan Luis Munoz Marin Intl

Mon 7/13

10:20 am-10:55 pm

2 stops14h 35m

$691
Quickest round-trip

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Mon 8/10

6:30 am-5:38 pm

1 stop9h 08m

San Juan Luis Munoz Marin Intl

Sat 8/15

2:00 pm-10:40 pm

1 stop10h 40m

$718
Cheapest one-way

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Sat 10/10

5:00 am-5:38 pm

1 stop10h 38m

$308

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/21

Showing 1-10 of 17 resultsSorted by cheapest first
1
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

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

Currently, December is the cheapest month in which you can book a flight from Boise to San Juan (average of $234). Flying from Boise to San Juan in April is currently the most expensive (average of $540). 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?

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 May 21, 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.

Crew

8.6

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

7.9

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Crew

8.6

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

7.9

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Crew

8.6

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

7.9

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Crew

8.6

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

7.9

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Crew

8.6

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

7.9

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 15m. Fly via Delta, Southwest, 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 $338, 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 47% 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, December is the cheapest month in which you can book a flight from Boise to San Juan (average of $234). Flying from Boise to San Juan in April is currently the most expensive (average of $540). 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

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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 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 May 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$338Average$581FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$442Average$765FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$452Average$585FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$499Average$679FlexibilityNo cancel feeOn-time71%

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