How long is the flight from Boise to San Juan?

There are many flights that can get you from Boise to San Juan in 12h 06m. Fly via Southwest, Delta, or American 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 62% lower than the current average price of a flight leaving 3 months from now.

In terms of precipitation, rainfall in San Juan ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit San Juan when rainfall is around 2.2 in.

If weather is an important factor for your trip to San Juan, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

What are the most popular airlines that fly from Boise to San Juan?

When booking a flight from Boise to San Juan, you may want to consider flying on Southwest, Delta or United Airlines as they are the most popular for this route.

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.

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.

$178+ Flights from Boise to San Juan

Q: 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 $422 and $1,023 in February. The cheapest round-trip price found within the last 3 days was $395 on Southwest (Feb 3-Feb 10).

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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 December 12, 2025.

Thu 12/115:25 pmBOI - SJU

2 stops15h 34mAmerican Airlines

Sat 12/206:44 amSJU - BOI

1 stop18h 18mAmerican Airlines

Deal found 12/9

$730

Thu 12/117:45 pmBOI - SJU

2 stops15h 02mDelta

Sat 12/204:45 pmSJU - BOI

1 stop10h 08mDelta

Deal found 12/11

$987

Thu 12/115:25 pmBOI - SJU

1 stop22h 00mUnited Airlines

Sat 12/202:25 pmSJU - BOI

1 stop11h 15mUnited Airlines

Deal found 12/11

$1,038

Thu 12/252:40 pmBOI - SJU

2 stops12h 31mUnited Airlines

Mon 12/293:46 pmSJU - BOI

2 stops24h 50mUnited Airlines

Deal found 12/10

$1,060

Thu 12/257:00 amBOI - SJU

1 stop11h 23mAmerican Airlines

Mon 12/297:00 amSJU - BOI

1 stop18h 02mAmerican Airlines

Deal found 12/10

$1,081

Fri 12/195:20 amBOI - SJU

2 stops15h 39mDelta

Sat 12/274:45 pmSJU - BOI

1 stop10h 08mDelta

Deal found 12/10

$1,347

Best flights from Boise to San Juan
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 December 12, 2025.

Tue 2/37:45 amBOI - SJU

2 stops13h 50mSouthwest

Tue 2/1012:10 pmSJU - BOI

2 stops13h 20mSouthwest

Deal found 12/11

$395

Mon 2/26:20 pmBOI - SJU

2 stops15h 45mDelta

Fri 2/67:30 amSJU - BOI

2 stops19h 29mDelta

Deal found 12/10

$405

Mon 2/27:20 amBOI - SJU

1 stop12h 06mAmerican Airlines

Fri 2/67:07 amSJU - BOI

1 stop15h 18mAmerican Airlines

Deal found 12/10

$431

Mon 2/236:55 pmBOI - SJU

2 stops16h 45mUnited Airlines

Thu 2/267:45 amSJU - BOI

2 stops16h 10mUnited Airlines

Deal found 12/11

$485

Mon 2/27:45 amBOI - SJU

2 stops12h 25mSouthwest

Fri 2/65:35 amSJU - BOI

2 stops13h 15mSouthwest

Deal found 12/10

$405

Sat 3/71:36 pmBOI - SJU

2 stops16h 24mAmerican Airlines

Tue 3/101:30 amSJU - BOI

1 stop13h 18mAmerican Airlines

Deal found 12/9

$470

Sat 3/74:25 pmBOI - SJU

2 stops13h 30mSouthwest

Wed 3/116:40 amSJU - BOI

2 stops17h 40mSouthwest

Deal found 12/9

$431

Tue 4/216:00 amBOI - SJU

2 stops13h 05mSouthwest

Sat 4/256:25 amSJU - BOI

2 stops11h 50mSouthwest

Deal found 12/10

$441

Last-minute flights from Boise to San Juan
Discover last-minute flight deals from Boise to San Juan. Data last updated December 12, 2025 and is based on user searches.

Thu 12/115:25 pmBOI - SJU

2 stops15h 34mAmerican Airlines

Sat 12/206:44 amSJU - BOI

1 stop18h 18mAmerican Airlines

Deal found 12/9

$730

Thu 12/117:45 pmBOI - SJU

2 stops15h 02mDelta

Sat 12/204:45 pmSJU - BOI

1 stop10h 08mDelta

Deal found 12/11

$987

Mon 1/56:15 pmBOI - SJU

2 stops19h 35mDelta

Sat 1/106:15 amSJU - BOI

2 stops19h 57mDelta

Deal found 12/11

$630

Mon 1/58:20 amBOI - SJU

1 stop9h 40mUnited Airlines

Fri 1/92:05 amSJU - BOI

2 stops14h 30mUnited Airlines

Deal found 12/11

$725

Mon 1/51:35 pmBOI - SJU

1 stop12h 25mAmerican Airlines

Sat 1/106:00 amSJU - BOI

1 stop11h 51mAmerican Airlines

Deal found 12/11

$847

Tue 1/207:20 amBOI - SJU

1 stop12h 06mAmerican Airlines

Sun 1/257:07 amSJU - BOI

1 stop15h 18mAmerican Airlines

Deal found 12/11

$431

Tue 1/205:55 pmBOI - SJU

2 stops25h 31mAlaska Airlines

Sun 1/257:07 amSJU - BOI

3 stops19h 52mAlaska Airlines

Deal found 12/11

$846

One-way flights from Boise to San Juan
Search for one-way flight options from Boise to San Juan. Find affordable one-way fares based on user searches. Data last updated December 12, 2025.

Mon 1/1212:07 pmBOI - SJU

3 stops24h 28mMultiple Airlines

Deal found 12/10

$178

Mon 1/1212:07 pmBOI - SJU

2 stops26h 44mFrontier

Deal found 12/10

$194

Mon 1/127:05 pmBOI - SJU

2 stops14h 50mUnited Airlines

Deal found 12/10

$198

Wed 1/215:40 amBOI - SJU

2 stops15h 17mDelta

Deal found 12/10

$203

Wed 1/217:20 amBOI - SJU

1 stop12h 06mAmerican Airlines

Deal found 12/11

$216

Wed 12/312:40 pmBOI - SJU

2 stops12h 31mUnited Airlines

Deal found 12/9

$233

Mon 1/127:20 amBOI - SJU

1 stop12h 06mAmerican Airlines

Deal found 12/10

$255

Sun 12/2812:38 pmBOI - SJU

2 stops33h 46mFrontier

Deal found 12/9

$293

Tue 12/305:25 pmBOI - SJU

2 stops14h 00mSouthwest

Deal found 12/9

$299

Tue 12/303:20 pmBOI - SJU

3 stops54h 17mMultiple Airlines

Deal found 12/9

$300

Fri 12/1910:41 pmBOI - SJU

3 stops47h 43mMultiple Airlines

Deal found 12/9

$309

Mon 12/2210:41 pmBOI - SJU

3 stops47h 43mMultiple Airlines

Deal found 12/9

$313

Find flight deals from Boise to San Juan

Round-trip from	$395 (Southwest)
One-way from	$178 (Kiwi.com)
Popular in	March
Cheapest in	September
Average price	$618

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. 2% potential increase in price ($18 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 December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Tue 2/3

7:45 am-12:35 am

2 stops13h 50m

San Juan Luis Munoz Marin Intl

Tue 2/10

12:10 pm-10:30 pm

2 stops13h 20m

$395

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Mon 2/2

6:20 pm-1:05 pm

2 stops15h 45m

San Juan Luis Munoz Marin Intl

Fri 2/6

7:30 am-11:59 pm

2 stops19h 29m

$405

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Mon 2/2

7:45 am-11:10 pm

2 stops12h 25m

San Juan Luis Munoz Marin Intl

Fri 2/6

5:35 am-3:50 pm

2 stops13h 15m

$405

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Mon 2/2

7:20 am-10:26 pm

1 stop12h 06m

San Juan Luis Munoz Marin Intl

Fri 2/6

7:07 am-7:25 pm

1 stop15h 18m

$431

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Sat 3/7

4:25 pm-8:55 am

2 stops13h 30m

San Juan Luis Munoz Marin Intl

Wed 3/11

6:40 am-10:20 pm

2 stops17h 40m

$431

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Tue 4/21

6:00 am-9:05 pm

2 stops13h 05m

San Juan Luis Munoz Marin Intl

Sat 4/25

6:25 am-4:15 pm

2 stops11h 50m

$441

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Sat 3/7

1:36 pm-9:00 am

2 stops16h 24m

San Juan Luis Munoz Marin Intl

Tue 3/10

1:30 am-12:48 pm

1 stop13h 18m

$470

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Mon 2/23

6:55 pm-2:40 pm

2 stops16h 45m

San Juan Luis Munoz Marin Intl

Thu 2/26

7:45 am-8:55 pm

2 stops16h 10m

$485

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Mon 1/12

12:07 pm-3:35 pm

3 stops24h 28m

$178

BoiseSan Juan

BOI - SJU

BOISJU

Boise Air Term. Gowen Fld

Mon 1/12

12:07 pm-5:51 pm

2 stops26h 44m

$194

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 18 results

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, June is the cheapest month in which you can book a flight from Boise to San Juan (average of $217). Flying from Boise to San Juan in July is currently the most expensive (average of $504). 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?

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 61% versus a flight in the morning.

How much does it cost to fly round-trip from Boise to San Juan?

Reviews of airlines servicing San Juan

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

7.9

Good

4,253 reviews

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

7.9

Good

4,253 reviews

Southwest

7.9

Good

4,253 reviews

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

8,008 reviews

Southwest

7.9

Good

4,253 reviews

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

9,095 reviews

Southwest

7.9

Good

4,253 reviews

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

11,050 reviews

Southwest

7.9

Good

4,253 reviews

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

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 12h 06m. Fly via Southwest, Delta, or American 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 62% 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 $217). Flying from Boise to San Juan in July is currently the most expensive (average of $504). 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

Alternative routes for Boise to San Juan

Boise to Luis Munoz Marin Intl flights

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Boise to Vieques flights

Complete your trip

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Santurce car rentals

San Juan Antiguo car rentals

Hato Rey Sur car rentals

Hato Rey Central car rentals

Top 4 airlines flying from Boise to San Juan

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$338	Average$565	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$449	Average$746	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$463	Average$629	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$530	Average$665	FlexibilityNo cancel fee	On-time71%

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$178+ 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 1/12. 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

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Cheap 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 December 12, 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 December 12, 2025.

Find flight deals from Boise to San Juan

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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Use the filters below to find and compare flights from Boise to San Juan that are best for you.

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

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

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 December 12, 2025.

How much does it cost to fly round-trip from Boise to San Juan?

Reviews of airlines servicing San Juan

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.

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?

How long is the flight from Boise to San Juan?

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

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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 December 12, 2025.