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$133+ Cheap flights from Boise (BOI) to Costa Rica

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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SJO
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Boise to Costa Rica

Keep the following information in mind while searching for Boise to Costa Rica flight deals. Data was last updated September 17, 2025.

Round-trip from

$280
(SmartFares)

One-way from

$133
(American Airlines)

Popular in

December

Cheapest in

August

Average price

$467
From Boise Air Term. Gowen Fld to Costa Rica
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One-way flight from Boise Air Term. Gowen Fld to Costa Rica
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($95 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Boise to Costa Rica

Cheapest flights from Boise to Costa Rica
Explore the most affordable flight options available from Boise to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This SmartFares deal was found by Cheapflights users on 9/17. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/116:05 pmBOI - SJO
2 stops29h 33mAlaska Airlines
Tue 11/181:55 amSJO - BOI
2 stops21h 04mAlaska Airlines
Deal found 9/17$280
This SmartFares deal was found by Cheapflights users on 9/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/115:54 amBOI - SJO
2 stops17h 44mAlaska Airlines
Mon 11/171:55 amSJO - BOI
1 stop12h 45mAlaska Airlines
Deal found 9/15$282
This SmartFares deal was found by Cheapflights users on 9/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/115:54 amBOI - SJO
2 stops17h 44mAlaska Airlines
Sun 11/161:55 amSJO - BOI
1 stop22h 07mAlaska Airlines
Deal found 9/15$288
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 11/112:40 pmBOI - SJO
1 stop16h 52mUnited Airlines
Tue 11/189:40 amSJO - BOI
1 stop10h 14mUnited Airlines
Deal found 9/15$298
This Alaska Airlines deal was found by Cheapflights users on 9/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/55:54 amBOI - SJO
2 stops41h 44mAlaska Airlines
Tue 11/111:55 amSJO - BOI
1 stop12h 45mAlaska Airlines
Deal found 9/17$314
This Delta deal was found by Cheapflights users on 9/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1311:35 pmBOI - SJO
1 stop12h 31mDelta
Mon 11/177:00 amSJO - BOI
2 stops18h 09mDelta
Deal found 9/17$320
This Alaska Airlines deal was found by Cheapflights users on 9/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/248:26 pmBOI - SJO
1 stop22h 34mAlaska Airlines
Thu 10/301:11 amSJO - BOI
1 stop12h 29mAlaska Airlines
Deal found 9/17$334
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sun 12/76:20 amBOI - LIR
1 stop8h 48mUnited Airlines
Sat 12/134:53 pmLIR - BOI
2 stops21h 46mUnited Airlines
Deal found 9/15$441
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 10/316:15 amBOI - LIR
1 stop8h 53mUnited Airlines
Sat 11/158:35 amLIR - BOI
2 stops15h 02mUnited Airlines
Deal found 9/15$461
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/289:08 amBOI - LIR
2 stops20h 12mAlaska Airlines
Fri 12/57:17 pmLIR - BOI
2 stops27h 41mAlaska Airlines
Deal found 9/16$476
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Thu 11/136:15 amBOI - LIR
1 stop8h 53mUnited Airlines
Mon 11/178:35 amLIR - BOI
2 stops15h 53mUnited Airlines
Deal found 9/15$489
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/316:58 pmBOI - LIR
1 stop11h 22mAlaska Airlines
Fri 11/711:20 amLIR - BOI
2 stops35h 48mAlaska Airlines
Deal found 9/16$509

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boise to Costa Rica 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 September 17, 2025.
Use the filters below to find and compare flights from Boise to Costa Rica that are best for you.

Fly from

Boise

Fly to

Costa Rica

Route

Depart

Return

Price

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Tue 2/24

7:07 am-8:39 pm

2 stops12h 32m

San José Juan Santamaria Intl

Tue 3/10

8:30 am-9:08 pm

1 stop12h 38m

$298

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Mon 2/2

7:05 pm-8:32 am

1 stop12h 27m

San José Juan Santamaria Intl

Mon 2/9

9:40 am-9:23 pm

1 stop12h 43m

$298

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Tue 11/11

2:31 pm-11:25 am

2 stops19h 54m

San José Juan Santamaria Intl

Tue 11/18

9:40 am-6:54 pm

1 stop10h 14m

$298

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Tue 11/11

6:05 pm-12:38 am

2 stops29h 33m

San José Juan Santamaria Intl

Mon 11/17

1:55 am-10:20 pm

2 stops21h 25m

$302

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Mon 1/12

7:05 pm-8:32 am

1 stop12h 27m

San José Juan Santamaria Intl

Wed 1/21

8:45 am-11:48 pm

2 stops16h 03m

$302

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Tue 3/3

5:00 am-6:16 pm

2 stops12h 16m

San José Juan Santamaria Intl

Tue 3/10

7:45 am-9:08 pm

2 stops13h 23m

$302

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Wed 11/5

5:54 am-12:38 am

2 stops41h 44m

San José Juan Santamaria Intl

Tue 11/11

1:55 am-1:40 pm

1 stop12h 45m

$314

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Fri 10/24

8:26 pm-7:00 pm

1 stop22h 34m

San José Juan Santamaria Intl

Thu 10/30

1:11 am-1:40 pm

1 stop12h 29m

$334

BoiseLiberia

BOI - LIR

BOILIR

Boise Air Term. Gowen Fld

Tue 2/10

6:00 am-6:35 pm

2 stops11h 35m

Liberia

Tue 3/3

7:45 pm-6:20 pm

2 stops23h 35m

$441

BoiseLiberia

BOI - LIR

BOILIR

Boise Air Term. Gowen Fld

Tue 2/10

6:00 am-6:35 pm

2 stops11h 35m

Liberia

Fri 2/27

7:45 pm-10:20 pm

2 stops27h 35m

$441

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 33 results
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Best time to book a flight from Boise to Costa Rica

Have a flexible travel schedule? Discover the best time to fly to Costa Rica 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 Costa Rica

What is the cheapest month to book a flight from Boise to Costa Rica?

Currently, September is the cheapest month in which you can book a flight from Boise to Costa Rica (average of $398). Flying from Boise to Costa Rica in March is currently the most expensive (average of $554). 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 CR?

Find hourly flight availability from Boise to Costa Rica. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Boise to Costa Rica as you normally would.

Reviews of airlines servicing Costa Rica

Get insights into the airlines that provide service to Costa Rica. 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 Costa Rica. Reviews last updated September 17, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from Boise to Costa Rica by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Southwest
8.0
Very good
4,242 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
8.0
Very good
7,961 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
8,926 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Related info for your journey

Find useful and relevant information for your journey from Boise to Costa Rica. 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 Costa Rica?

    Most people fly from Boise Air Term. Gowen Fld (BOI) if they book a flight from Boise to Costa Rica. Boise Air Term. Gowen Fld is conveniently located just 3.3 mi from Boise’s city center.

  • How long is the flight from Boise to Costa Rica?

    United Airlines and Alaska Airlines can get you from Boise to Costa Rica in just under 12h 32m. Your travel time can differ by up to 17h 01m. There are 3008 mi between Boise and Costa Rica. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Boise to Costa Rica one-way?

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $133. Delta flights start at $142 while deals on United Airlines start at $145 one-way.

  • Can I find deals for flights from Boise to Costa Rica that include hotel bookings?

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

  • How can I find direct flights from Boise to Costa Rica?

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

  • Can I find deals for business class flights from Boise to Costa Rica?

    Yes. Cheapflights offers flight deals from Boise to Costa Rica 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 Costa Rica?

    Currently, September is the cheapest month in which you can book a flight from Boise to Costa Rica (average of $398). Flying from Boise to Costa Rica in March is currently the most expensive (average of $554). 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 Costa Rica

See prices for flight routes from nearby airports that may be better suited for you.
Boise to San José flights
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Top 6 airlines flying from Boise to Costa Rica

Discover the top 6 airlines that operate flights from Boise to Costa Rica. 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$147Average$815FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$365Average$716FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$429Average$698FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$439Average$610FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$557Average$688FlexibilityNo cancel feeOn-time63%
Copa AirlinesCheapest$591Average$1,029FlexibilityNo cancel feeOn-time70%

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