$133 Cheap Flights from Boise (BOI) to San José (SJO)

View $133 flight on Sat, Sep 27, 2025Opens in a new window

Popular airlines from Boise Airport (BOI) to Juan Santamaria Intl. Airport (SJO)

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Cheap Flights from Boise to San José (BOI-SJO)

Prices were available within the past 7 days and start at $133 for one-way flights and $302 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Oct 18 - Sat, Oct 25
BOI
Boise
SJO
San José
$302 Roundtrip, found 17 hours ago
$302
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Sat, Oct 18 from Boise to San José, returning Sat, Oct 25, priced at $302 found 17 hours ago
Alaska Airlines
Thu, Jan 22 - Sun, Feb 1
BOI
Boise
SJO
San José
$307 Roundtrip, found 1 hour ago
$307
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Thu, Jan 22 from Boise to San José, returning Sun, Feb 1, priced at $307 found 1 hour ago
American Airlines
Sun, Jan 11 - Sun, Jan 18
BOI
Boise
SJO
San José
$307 Roundtrip, found 8 hours ago
$307
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Sun, Jan 11 from Boise to San José, returning Sun, Jan 18, priced at $307 found 8 hours ago
Alaska Airlines
Wed, Oct 29 - Wed, Nov 5
BOI
Boise
SJO
San José
$308 Roundtrip, found 23 hours ago
$308
Roundtrip
found 23 hours ago
Select Alaska Airlines flight, departing Wed, Oct 29 from Boise to San José, returning Wed, Nov 5, priced at $308 found 23 hours ago
American Airlines
Tue, Aug 26 - Sat, Aug 30
BOI
Boise
SJO
San José
$310 Roundtrip, found 14 hours ago
$310
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Tue, Aug 26 from Boise to San José, returning Sat, Aug 30, priced at $310 found 14 hours ago
Alaska Airlines
Thu, Jan 22 - Sun, Feb 1
BOI
Boise
SJO
San José
$311 Roundtrip, found 1 hour ago
$311
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Thu, Jan 22 from Boise to San José, returning Sun, Feb 1, priced at $311 found 1 hour ago
Alaska Airlines
Mon, Feb 23 - Tue, Mar 3
BOI
Boise
SJO
San José
$313 Roundtrip, found 9 hours ago
$313
Roundtrip
found 9 hours ago
Select Alaska Airlines flight, departing Mon, Feb 23 from Boise to San José, returning Tue, Mar 3, priced at $313 found 9 hours ago
Delta
Fri, Nov 14 - Sat, Nov 22
BOI
Boise
SJO
San José
$316 Roundtrip, found 22 hours ago
$316
Roundtrip
found 22 hours ago
Select Delta flight, departing Fri, Nov 14 from Boise to San José, returning Sat, Nov 22, priced at $316 found 22 hours ago
United
Sat, Sep 20 - Sat, Oct 11
BOI
Boise
SJO
San José
$316 Roundtrip, found 2 hours ago
$316
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Sep 20 from Boise to San José, returning Sat, Oct 11, priced at $316 found 2 hours ago
Southwest Airlines
Mon, Oct 6 - Wed, Oct 15
BOI
Boise
SJO
San José
$351 Roundtrip, just found
$351
Roundtrip
just found
Select Southwest Airlines flight, departing Mon, Oct 6 from Boise to San José, returning Wed, Oct 15, priced at $351 just found

Find the cheapest month to fly from Boise (BOI) to San José (SJO)

August is typically the cheapest month to fly

From $316 - $713 per traveler.

Graph displaying average flight prices per month

Alternative airports near San José

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

Select flight to Juan Santamaria Intl. SJO. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $377
SJO
Juan Santamaria Intl.
Cheapest
Average driving time to city center20 min
Flights from $377
Flights from Boise (BOI) to San José (SJO)
Origin airport
Boise
Destination airport
Juan Santamaría Intl.
Airlines serving
Aeromexico, Air Canada, Alaska Airlines, American Airlines, Copa, Delta, Southwest Airlines, Spirit Airlines, United
Roundtrip price
$302
Distance
3009 mi

Boise to San José Flights

The cheapest times to fly from Boise to San José

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 José are during the month of October. You can find some of the cheapest flights from Boise to San José with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Boise to San José: 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 José

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 José in 2025. You can also book with separate airlines for your outbound and return journeys, from $133 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 José 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 José 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 Juan Santamaria Intl. Airport (SJO) cost?
Discover the latest flight deals from BOI to SJO by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from BOI to SJO?
The cheapest flights from BOI to SJO are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from BOI to SJO?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from BOI to SJO. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Boise Airport (BOI) to Juan Santamaria Intl. Airport (SJO)?
There are no daily direct flights departing from Boise Airport (BOI) to Juan Santamaria Intl. Airport (SJO). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from BOI to SJO?
Generally you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* However, this can change depending on the season, carrier 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 Juan Santamaria Intl. Airport (SJO)?
To land at Juan Santamaria Intl. Airport (SJO) on time, choose a flight that leaves Boise Airport (BOI) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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 Juan Santamaria Intl. Airport (SJO) last-minute?
Booking your plane ticket from BOI to SJO just before your journey is usually more expensive. However, if there's some wiggle room with your travel times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a BOI to SJO flight and hotel package?
Compared with arranging flights and hotels separately, booking a BOI to SJO flight and hotel package with Expedia could result in significant savings. Better still, managing everything in one place takes the hassle out of planning your trip. Just secure your flights and choose from our wide range of hotels, then customize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Boise Airport (BOI) to Juan Santamaria Intl. Airport (SJO)?
If you booked your BOI to SJO flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

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*Available to One Key members.