$198 Cheap Flights from Boise (BOI) to San Juan (SJU)

View $198 flight on Sun, Jan 4, 2026Opens in a new window

Popular airlines from Boise Airport (BOI) to Luis Munoz Marin Intl. Airport (SJU)

Cheap Flights from Boise to San Juan (BOI-SJU)

Prices were available within the past 7 days and start at $198 for one-way flights and $390 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Dec 9 - Wed, Dec 10
BOI
Boise
SJU
San Juan
$390 Roundtrip, found 2 days ago
$390
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Dec 9 from Boise to San Juan, returning Wed, Dec 10, priced at $390 found 2 days ago
United
Tue, Jan 13 - Tue, Feb 3
BOI
Boise
SJU
San Juan
$395 Roundtrip, found 6 hours ago
$395
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Jan 13 from Boise to San Juan, returning Tue, Feb 3, priced at $395 found 6 hours ago
Southwest Airlines
Mon, Dec 1 - Fri, Dec 5
BOI
Boise
SJU
San Juan
$395 Roundtrip, found 4 hours ago
$395
Roundtrip
found 4 hours ago
Select Southwest Airlines flight, departing Mon, Dec 1 from Boise to San Juan, returning Fri, Dec 5, priced at $395 found 4 hours ago
Southwest Airlines
Mon, Dec 1 - Fri, Dec 5
BOI
Boise
SJU
San Juan
$401 Roundtrip, found 4 hours ago
$401
Roundtrip
found 4 hours ago
Select Southwest Airlines flight, departing Mon, Dec 1 from Boise to San Juan, returning Fri, Dec 5, priced at $401 found 4 hours ago
Delta
Mon, Dec 8 - Sat, Dec 13
BOI
Boise
SJU
San Juan
$407 Roundtrip, found 14 hours ago
$407
Roundtrip
found 14 hours ago
Select Delta flight, departing Mon, Dec 8 from Boise to San Juan, returning Sat, Dec 13, priced at $407 found 14 hours ago
Southwest Airlines
Fri, Jun 12 - Tue, Jun 16
BOI
Boise
SJU
San Juan
$413 Roundtrip, found 3 hours ago
$413
Roundtrip
found 3 hours ago
Select Southwest Airlines flight, departing Fri, Jun 12 from Boise to San Juan, returning Tue, Jun 16, priced at $413 found 3 hours ago
United
Wed, Dec 10 - Sun, Dec 14
BOI
Boise
SJU
San Juan
$419 Roundtrip, found 14 hours ago
$419
Roundtrip
found 14 hours ago
Select United flight, departing Wed, Dec 10 from Boise to San Juan, returning Sun, Dec 14, priced at $419 found 14 hours ago
American Airlines
Mon, Dec 8 - Sat, Dec 13
BOI
Boise
SJU
San Juan
$420 Roundtrip, found 14 hours ago
$420
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Mon, Dec 8 from Boise to San Juan, returning Sat, Dec 13, priced at $420 found 14 hours ago
American Airlines
Sat, Jan 10 - Wed, Jan 14
BOI
Boise
SJU
San Juan
$426 Roundtrip, found 8 hours ago
$426
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Sat, Jan 10 from Boise to San Juan, returning Wed, Jan 14, priced at $426 found 8 hours ago
Alaska Airlines
Tue, Jan 13 - Tue, Feb 3
BOI
Boise
SJU
San Juan
$541 Roundtrip, found 6 hours ago
$541
Roundtrip
found 6 hours ago
Select Alaska Airlines flight, departing Tue, Jan 13 from Boise to San Juan, returning Tue, Feb 3, priced at $541 found 6 hours ago

Find the cheapest month to fly from Boise (BOI) to San Juan (SJU)

March is typically the cheapest month to fly

From $277 - $860 per traveler.

Alternative airports near San Juan

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Luis Munoz Marin Intl. SJU. Cheapest option available. Average driving time to city center is 16 minutes. Flights from $568
SJU
Luis Munoz Marin Intl.
Cheapest
Average driving time to city center16 min
Flights from $568
Flights from Boise (BOI) to San Juan (SJU)
Origin airport
Boise
Destination airport
Luis Munoz Marin Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Southwest Airlines, United
Roundtrip price
$389
Distance
3375 mi

Boise to San Juan Flights

The cheapest times to fly from Boise to San Juan

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Boise to San Juan are during the month of December. You can find some of the cheapest flights from Boise to San Juan with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Boise to San Juan

Sunday is one of the best days to book for cheap flights from Boise to San Juan: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Boise to San Juan

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Boise to San Juan in 2025. You can also book with separate airlines for your outbound and return journeys, from $198 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Boise to San Juan flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Boise to San Juan airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Boise Airport (BOI) to Luis Munoz Marin Intl. Airport (SJU) cost?
Secure a cheap one-way flight from $198 or cheap return flight from $390 from Boise Airport (BOI) to Luis Munoz Marin Intl. Airport (SJU) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Boise Airport (BOI) to Luis Munoz Marin Intl. Airport (SJU)?
Planning your trip for December can help you save, as it's the cheapest month for flights between BOI and SJU. You'll often find the lowest prices during the off-season.
What is the cheapest airline that flies from Boise Airport (BOI) to Luis Munoz Marin Intl. Airport (SJU)?
To find the cheapest airline that'll fly you from BOI to SJU, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Boise Airport (BOI) to Luis Munoz Marin Intl. Airport (SJU)?
You'll have to catch a flight with a layover if you're traveling from Boise Airport (BOI) to Luis Munoz Marin Intl. Airport (SJU). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from BOI to SJU?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* However, this can change depending on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Boise Airport (BOI) to Luis Munoz Marin Intl. Airport (SJU)?
Choose a flight from Boise Airport (BOI) to Luis Munoz Marin Intl. Airport (SJU) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Boise Airport (BOI) to Luis Munoz Marin Intl. Airport (SJU) last-minute?
Booking your flight from BOI to SJU right before your trip is typically more expensive. However, if there's some wiggle room with your travel dates and times, you could grab a cheap last-minute fare.
Can I cancel or change the date of my flight from Boise Airport (BOI) to Luis Munoz Marin Intl. Airport (SJU)?
If you reserved your BOI to SJU flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

Explore a world of travel with Expedia

*Available to One Key members.