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Costa Rica

$135+ Cheap flights from Idaho 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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SJO
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Idaho to Costa Rica

Cheapest flights from Idaho to Costa Rica
Explore the most affordable flight options available from Idaho to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/211:27 pmBOI - SJO
1 stop8h 18mAmerican Airlines
Tue 12/307:00 amSJO - BOI
1 stop16h 59mAmerican Airlines
Deal found 12/16$679
This United Airlines deal was found by Cheapflights users on 12/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/195:12 pmBOI - LIR
2 stops16h 57mUnited Airlines
Tue 12/2312:30 pmLIR - BOI
1 stop11h 29mUnited Airlines
Deal found 12/17$715
This Delta deal was found by Cheapflights users on 12/17. 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.
Wed 12/171:15 pmGEG - LIR
2 stops21h 25mDelta
Sun 12/212:45 pmLIR - GEG
1 stop10h 31mDelta
Deal found 12/17$719
This United Airlines deal was found by Cheapflights users on 12/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/215:12 pmBOI - SJO
2 stops26h 27mUnited Airlines
Tue 12/306:30 amSJO - BOI
2 stops17h 10mUnited Airlines
Deal found 12/17$809
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/175:25 amGEG - LIR
1 stop8h 43mUnited Airlines
Sun 12/2112:50 pmLIR - GEG
1 stop10h 08mUnited Airlines
Deal found 12/16$825
This American Airlines deal was found by Cheapflights users on 12/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/171:14 pmGEG - LIR
1 stop22h 23mAmerican Airlines
Sun 12/212:37 pmLIR - GEG
1 stop23h 32mAmerican Airlines
Deal found 12/17$845
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:00 amBOI - SJO
2 stops16h 32mUnited Airlines
Fri 1/27:30 amSJO - BOI
1 stop27h 31mUnited Airlines
Deal found 12/16$857
This deal was found by Cheapflights users on 12/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2410:42 amBOI - SJO
1 stop10h 18mUnited Airlines
Wed 12/317:30 amSJO - BOI
1 stop11h 33mUnited Airlines
Deal found 12/15$882
This deal was found by Cheapflights users on 12/17. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:55 pmBOI - SJO
1 stop12h 37mUnited Airlines
Wed 12/319:40 amSJO - BOI
1 stop10h 33mUnited Airlines
Deal found 12/17$901
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/172:21 pmSUN - SJO
1 stop17h 11mUnited Airlines
Sat 1/39:40 amSJO - SUN
1 stop27h 54mUnited Airlines
Deal found 12/16$915
This deal was found by Cheapflights users on 12/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2410:42 amBOI - SJO
1 stop10h 18mUnited Airlines
Thu 1/17:30 amSJO - BOI
1 stop11h 33mUnited Airlines
Deal found 12/15$962
This deal was found by Cheapflights users on 12/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2510:42 amBOI - SJO
1 stop10h 18mUnited Airlines
Wed 12/317:30 amSJO - BOI
1 stop11h 33mUnited Airlines
Deal found 12/15$964

Find flight deals from Idaho to Costa Rica

Keep the following information in mind while searching for Idaho to Costa Rica flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$302
(American Airlines)

One-way from

$135
(American Airlines)

Popular in

December

Cheapest in

January

Average price

$968
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 Idaho to Costa Rica
Search Deals
One-way flight from Idaho to Costa Rica
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho 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 December 18, 2025.
Use the filters below to find and compare flights from Idaho to Costa Rica that are best for you.

Fly from

Idaho

Fly to

Costa Rica

Route

Depart

Return

Price

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Wed 1/7

7:05 pm-8:32 am

1 stop12h 27m

San José Juan Santamaria Intl

Sat 1/17

9:40 am-11:48 pm

1 stop15h 08m

$393

SpokaneSan José

GEG - SJO

GEGSJO

Spokane

Wed 2/25

12:38 pm-8:32 am

1 stop17h 54m

San José Juan Santamaria Intl

Thu 3/19

8:40 am-9:03 pm

1 stop13h 23m

$408

SpokaneSan José

GEG - SJO

GEGSJO

Spokane

Fri 1/23

5:00 am-10:00 pm

1 stop15h 00m

San José Juan Santamaria Intl

Wed 1/28

9:40 am-7:16 pm

1 stop11h 36m

$408

BoiseSan José

BOI - SJO

BOISJO

Boise Air Term. Gowen Fld

Tue 1/20

10:48 am-8:32 am

1 stop20h 44m

San José Juan Santamaria Intl

Fri 1/23

9:40 am-9:23 pm

1 stop12h 43m

$408

Idaho FallsSan José

IDA - SJO

IDASJO

Idaho Falls Fanning Field

Thu 1/22

4:19 pm-12:56 pm

2 stops19h 37m

San José Juan Santamaria Intl

Wed 1/28

2:20 pm-9:56 am

2 stops20h 36m

$412

Idaho FallsSan José

IDA - SJO

IDASJO

Idaho Falls Fanning Field

Wed 1/21

2:40 pm-12:56 pm

2 stops21h 16m

San José Juan Santamaria Intl

Fri 1/30

6:30 am-9:56 am

2 stops28h 26m

$412

Idaho FallsSan José

IDA - SJO

IDASJO

Idaho Falls Fanning Field

Fri 1/23

4:19 pm-1:15 pm

2 stops19h 56m

San José Juan Santamaria Intl

Thu 1/29

2:05 pm-1:30 pm

2 stops24h 25m

$412

Idaho FallsSan José

IDA - SJO

IDASJO

Idaho Falls Fanning Field

Sun 2/1

4:19 pm-6:16 pm

2 stops24h 57m

San José Juan Santamaria Intl

Tue 2/10

6:30 am-9:56 am

2 stops28h 26m

$412

Idaho FallsSan José

IDA - SJO

IDASJO

Idaho Falls Fanning Field

Thu 1/22

4:19 pm-6:16 pm

2 stops24h 57m

San José Juan Santamaria Intl

Mon 1/26

6:30 am-9:56 am

2 stops28h 26m

$412

SpokaneSan José

GEG - SJO

GEGSJO

Spokane

Tue 2/3

12:24 pm-1:15 pm

2 stops22h 51m

San José Juan Santamaria Intl

Thu 2/5

2:20 pm-10:44 am

2 stops22h 24m

$412

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 37 results
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Best time to book a flight from Idaho to Costa Rica

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

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

Currently, October is the cheapest month in which you can book a flight from Idaho to Costa Rica (average of $162). Flying from Idaho to Costa Rica in December is currently the most expensive (average of $575). 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 ID to CR?

Find hourly flight availability from Idaho 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 December 18, 2025.

It’s typically best to fly out from Idaho to Costa Rica at noon. Doing so could potentially save you 12% on the flight price compared to flying in the morning, which is usually more expensive.

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

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

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

Related info for your journey

Find useful and relevant information for your journey from Idaho to Costa Rica. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Departing from Idaho to Costa Rica will take you 12h 27m. There are 3008 mi between Idaho and Costa Rica. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Idaho to Costa Rica (average of $162). Flying from Idaho to Costa Rica in December is currently the most expensive (average of $575). 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

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Alternative routes for Idaho 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 Idaho to Costa Rica

Discover the top 5 airlines that operate flights from Idaho 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$141Average$815FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$303Average$682FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$309Average$716FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$376Average$620FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$454Average$752FlexibilityNo cancel feeOn-time63%

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