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$161+ 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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SJO
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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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 November 6, 2025.

This Alaska Airlines deal was found by Cheapflights users on 11/5. 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.
Tue 11/116:28 amBOI - SJO
2 stops17h 10mAlaska Airlines
Mon 11/171:55 amSJO - BOI
2 stops15h 22mAlaska Airlines
Deal found 11/5$320
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Sat 11/87:00 pmBOI - SJO
1 stop12h 32mUnited Airlines
Wed 11/129:40 amSJO - BOI
1 stop14h 48mUnited Airlines
Deal found 11/5$328
This United Airlines deal was found by Cheapflights users on 11/6. 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 11/710:40 amBOI - SJO
1 stop20h 52mUnited Airlines
Fri 11/149:40 amSJO - BOI
1 stop14h 48mUnited Airlines
Deal found 11/6$334
This Delta deal was found by Cheapflights users on 11/6. 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.
Sun 11/93:54 pmBOI - SJO
2 stops20h 11mDelta
Sat 11/158:26 amSJO - BOI
2 stops16h 41mDelta
Deal found 11/6$341
This Alaska Airlines deal was found by Cheapflights users on 11/5. 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.
Tue 11/118:08 amBOI - SJO
1 stop15h 30mAlaska Airlines
Tue 11/181:55 amSJO - BOI
2 stops15h 22mAlaska Airlines
Deal found 11/5$366
This United Airlines deal was found by Cheapflights users on 11/5. 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 11/72:40 pmBOI - SJO
1 stop16h 52mUnited Airlines
Wed 11/1212:35 pmSJO - BOI
2 stops11h 10mUnited Airlines
Deal found 11/5$387
This United Airlines deal was found by Cheapflights users on 11/6. 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 12/57:11 pmBOI - SJO
1 stop12h 21mUnited Airlines
Fri 12/129:40 amSJO - BOI
1 stop15h 04mUnited Airlines
Deal found 11/6$394
This Alaska Airlines deal was found by Cheapflights users on 11/6. 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.
Sat 12/65:59 pmBOI - LIR
2 stops23h 08mAlaska Airlines
Wed 12/107:17 pmLIR - BOI
1 stop18h 56mAlaska Airlines
Deal found 11/6$454
This Delta deal was found by Cheapflights users on 11/5. 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 11/2411:39 pmBOI - LIR
1 stop12h 01mDelta
Thu 12/42:05 pmLIR - BOI
2 stops22h 57mDelta
Deal found 11/5$621
This United Airlines deal was found by Cheapflights users on 11/4. 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 11/137:00 pmBOI - LIR
2 stops20h 08mUnited Airlines
Mon 11/1712:50 pmLIR - BOI
1 stop10h 55mUnited Airlines
Deal found 11/4$715
This American Airlines deal was found by Cheapflights users on 11/6. 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 11/241:25 pmBOI - LIR
1 stop23h 53mAmerican Airlines
Thu 12/43:14 pmLIR - BOI
1 stop22h 13mAmerican Airlines
Deal found 11/6$792
This Alaska Airlines deal was found by Cheapflights users on 11/5. 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.
Mon 11/2412:46 pmBOI - LIR
2 stops16h 34mAlaska Airlines
Thu 12/49:00 amLIR - BOI
2 stops15h 50mAlaska Airlines
Deal found 11/5$794

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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$298
(United Airlines)

One-way from

$161
(United Airlines)

Popular in

December

Cheapest in

January

Average price

$536
Provider with most accurate pricing for Boise Air Term. Gowen Fld-San José Juan Santamaria Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-San José Juan Santamaria Intl flights.
Search Deals
From Boise Air Term. Gowen Fld to Costa Rica
Search Deals
One-way flight from Boise Air Term. Gowen Fld to Costa Rica
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 6, 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

Mon 2/2

7:05 pm-8:32 am

1 stop12h 27m

San José Juan Santamaria Intl

Mon 2/9

9:40 am-11:48 pm

1 stop15h 08m

$298

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Tue 11/11

8:50 am-12:38 am

2 stops14h 48m

San José Juan Santamaria Intl

Mon 11/17

1:55 am-1:40 pm

1 stop12h 45m

$320

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Tue 11/11

6:28 am-12:38 am

2 stops17h 10m

San José Juan Santamaria Intl

Tue 11/18

1:55 am-3:12 pm

2 stops14h 17m

$320

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Fri 12/5

7:11 pm-8:32 am

1 stop12h 21m

San José Juan Santamaria Intl

Fri 12/12

9:40 am-11:44 pm

1 stop15h 04m

$394

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Fri 12/5

11:44 am-7:00 am

2 stops18h 16m

San José Juan Santamaria Intl

Fri 12/12

2:31 pm-11:04 am

2 stops21h 33m

$400

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Tue 11/11

2:40 pm-8:32 am

1 stop16h 52m

San José Juan Santamaria Intl

Wed 11/19

9:40 am-11:28 pm

1 stop14h 48m

$438

BoiseLiberia

BOI - LIR

BOILIR

Boise Air Term. Gowen Fld

Sat 12/6

3:39 pm-6:07 pm

2 stops25h 28m

Liberia

Wed 12/10

9:00 am-11:50 pm

2 stops15h 50m

$454

BoiseLiberia

BOI - LIR

BOILIR

Boise Air Term. Gowen Fld

Tue 1/27

6:10 am-4:08 pm

1 stop8h 58m

Liberia

Sun 2/1

9:30 am-9:23 pm

1 stop12h 53m

$509

BoiseLiberia

BOI - LIR

BOILIR

Boise Air Term. Gowen Fld

Sun 1/25

6:10 am-4:08 pm

1 stop8h 58m

Liberia

Sun 2/1

2:20 pm-10:06 am

2 stops20h 46m

$513

BoiseLiberia

BOI - LIR

BOILIR

Boise Air Term. Gowen Fld

Mon 11/24

11:39 pm-12:40 pm

1 stop12h 01m

Liberia

Thu 12/4

2:05 pm-12:02 pm

2 stops22h 57m

$621

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 18 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, October is the cheapest month in which you can book a flight from Boise to Costa Rica (average of $165). Flying from Boise to Costa Rica in December is currently the most expensive (average of $568). 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 November 6, 2025.

It’s optimal to fly from Boise to Costa Rica in the afternoon. By choosing this option you can save up to 20% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Boise to Costa Rica?

Use this chart to determine the cheapest time to fly round-trip from Boise to Costa Rica. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Boise to Costa Rica flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 6, 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
11,247 reviews

Entertainment

7.0

Food

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Alaska Airlines
8.0
Very good
11,247 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Entertainment

7.0

Food

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Southwest
8.0
Very good
4,241 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Entertainment

7.0

Food

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Delta
7.9
Good
8,001 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Entertainment

7.0

Food

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
United Airlines
7.4
Good
9,007 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Entertainment

7.0

Food

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
American Airlines
7.2
Good
11,040 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Entertainment

7.0

Food

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

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 27m. Your travel time can differ by up to 2h 21m. 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 United Airlines, which is currently one of the cheapest options available, starting at $161. Delta flights start at $163 while deals on American Airlines start at $163 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, October is the cheapest month in which you can book a flight from Boise to Costa Rica (average of $165). Flying from Boise to Costa Rica in December is currently the most expensive (average of $568). 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.
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Top 5 airlines flying from Boise to Costa Rica

Discover the top 5 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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$141Average$815FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$317Average$570FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$323Average$653FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$376Average$636FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$477Average$710FlexibilityNo cancel feeOn-time63%

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