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$346+ Cheap flights from Idaho to Spain

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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — MAD
Mar 15 — Mar 221
Sun 3/15
Sun 3/22
1 adult, Economy
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Cheap flight deals from Idaho to Spain

Cheapest flights from Idaho to Spain
Explore the most affordable flight options available from Idaho to Spain. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.

This United Airlines deal was found by Cheapflights users on 2/10. 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 4/156:15 am
BOI
-
BCN
2 stops17h 45m
United Airlines
Wed 4/221:15 pm
BCN
-
BOI
2 stops40h 07m
United Airlines
Deal found 2/10$475
This United Airlines deal was found by Cheapflights users on 2/10. 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 4/122:37 pm
BOI
-
BCN
2 stops23h 48m
United Airlines
Wed 4/221:15 pm
BCN
-
BOI
2 stops40h 07m
United Airlines
Deal found 2/10$479
This CheapOair deal was found by Cheapflights users on 2/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/125:00 am
BOI
-
BCN
2 stops44h 20m
Air Canada
Wed 4/221:15 pm
BCN
-
BOI
2 stops40h 07m
Air Canada
Deal found 2/11$481
This American Airlines deal was found by Cheapflights users on 2/10. 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 4/126:26 pm
BOI
-
BCN
2 stops17h 54m
American Airlines
Wed 4/2210:45 am
BCN
-
BOI
1 stop20h 09m
American Airlines
Deal found 2/10$483
This Gurufare deal was found by Cheapflights users on 2/10. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/152:18 pm
BOI
-
BCN
1 stop14h 32m
Multiple Airlines
Wed 4/2211:00 am
BCN
-
BOI
1 stop19h 28m
Multiple Airlines
Deal found 2/10$486
This Finnair deal was found by Cheapflights users on 2/12. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/121:29 pm
BOI
-
BCN
1 stop13h 26m
Finnair
Wed 4/2210:45 am
BCN
-
BOI
1 stop20h 09m
Finnair
Deal found 2/12$487
This American Airlines deal was found by Cheapflights users on 2/13. 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.
Tue 4/141:29 pm
BOI
-
MAD
2 stops18h 21m
American Airlines
Tue 4/283:55 pm
MAD
-
BOI
1 stop28h 56m
American Airlines
Deal found 2/13$493
This Cheapflightsfares deal was found by Cheapflights users on 2/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/142:37 pm
BOI
-
MAD
2 stops17h 33m
Lufthansa
Tue 4/287:00 am
MAD
-
BOI
2 stops22h 22m
Lufthansa
Deal found 2/10$494
This United Airlines deal was found by Cheapflights users on 2/11. 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 4/146:15 am
BOI
-
MAD
2 stops16h 35m
United Airlines
Tue 4/285:55 am
MAD
-
BOI
2 stops22h 18m
United Airlines
Deal found 2/11$496
This Delta deal was found by Cheapflights users on 2/10. 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 4/225:00 am
GEG
-
MAD
2 stops19h 55m
Delta
Wed 4/292:35 pm
MAD
-
GEG
2 stops18h 45m
Delta
Deal found 2/10$496
This Finnair deal was found by Cheapflights users on 2/10. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/141:43 pm
BOI
-
MAD
1 stop16h 42m
Multiple Airlines
Tue 4/283:55 pm
MAD
-
BOI
1 stop28h 56m
Multiple Airlines
Deal found 2/10$497
This United Airlines deal was found by Cheapflights users on 2/9. 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 4/215:00 am
BOI
-
BCN
2 stops28h 55m
United Airlines
Mon 5/412:15 pm
BCN
-
BOI
2 stops36h 31m
United Airlines
Deal found 2/9$524

Find flight deals from Idaho to Spain

Keep the following information in mind while searching for Idaho to Spain flight deals. Data was last updated February 13, 2026.

Round-trip from

$475
(United Airlines)

One-way from

$346
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$484
From Idaho to Spain
Search Deals
One-way flight from Idaho to Spain
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($280 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($49 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Spain 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 February 13, 2026.
Use the filters below to find and compare flights from Idaho to Spain that are best for you.

Fly from

Idaho

Fly to

Spain

Route

Depart

Return

Price

SpokaneBarcelona

GEG - BCN

GEGBCN

Spokane

Wed 4/15

5:05 am-1:15 pm

2 stops23h 10m

Barcelona-El Prat

Thu 4/23

1:15 pm-6:51 pm

2 stops38h 36m

$476

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Sun 4/12

2:37 pm-10:25 pm

2 stops23h 48m

Barcelona-El Prat

Wed 4/22

1:15 pm-9:22 pm

2 stops40h 07m

$479

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Sun 4/12

6:26 pm-8:20 pm

2 stops17h 54m

Barcelona-El Prat

Wed 4/22

10:45 am-10:54 pm

1 stop20h 09m

$484

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Sun 4/12

1:29 pm-10:55 am

1 stop13h 26m

Barcelona-El Prat

Wed 4/22

10:45 am-10:54 pm

1 stop20h 09m

$487

SpokaneBarcelona

GEG - BCN

GEGBCN

Spokane

Wed 4/22

12:36 pm-12:50 pm

1 stop15h 14m

Barcelona-El Prat

Wed 4/29

11:00 am-9:31 pm

1 stop19h 31m

$487

SpokaneBarcelona

GEG - BCN

GEGBCN

Spokane

Tue 4/14

4:01 pm-1:15 pm

2 stops36h 14m

Barcelona-El Prat

Thu 4/23

1:15 pm-6:51 pm

2 stops38h 36m

$487

SpokaneBarcelona

GEG - BCN

GEGBCN

Spokane

Sun 4/19

7:10 am-1:15 pm

1 stop21h 05m

Barcelona-El Prat

Tue 4/28

12:15 pm-12:41 pm

2 stops33h 26m

$490

SpokaneBarcelona

GEG - BCN

GEGBCN

Spokane

Tue 4/21

3:30 pm-5:10 pm

2 stops16h 40m

Barcelona-El Prat

Wed 4/29

11:00 am-9:31 pm

1 stop19h 31m

$491

SpokaneBarcelona

GEG - BCN

GEGBCN

Spokane

Tue 4/21

3:30 pm-5:10 pm

2 stops16h 40m

Barcelona-El Prat

Thu 4/30

11:00 am-9:31 pm

1 stop19h 31m

$491

SpokaneBarcelona

GEG - BCN

GEGBCN

Spokane

Wed 4/22

12:36 pm-12:50 pm

1 stop15h 14m

Barcelona-El Prat

Fri 5/1

11:00 am-11:41 am

1 stop33h 41m

$492

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/10

Showing 1-10 of 60 results
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Best time to book a flight from Idaho to Spain

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

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

Currently, March is the cheapest month in which you can book a flight from Idaho to Spain (average of $475). Flying from Idaho to Spain in June is currently the most expensive (average of $776). 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.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Spain. 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 Spain?

    A quick flight from Idaho to Spain can take about 13h 26m. United Airlines provides one of the quickest options available for as low as $487. There are 5431 mi between Idaho and Spain. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

  • How can I find direct flights from Idaho to Spain?

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

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

    Yes. Cheapflights offers flight deals from Idaho to Spain 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 Spain?

    Currently, March is the cheapest month in which you can book a flight from Idaho to Spain (average of $475). Flying from Idaho to Spain in June is currently the most expensive (average of $776). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Idaho to Spain

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Idaho to Spain

Discover the top 7 airlines that operate flights from Idaho to Spain. 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 February 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$483Average$668FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$493Average$730FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$541Average$902FlexibilityNo cancel feeOn-time71%
DeltaCheapest$550Average$941FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$637Average$856FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$651Average$857FlexibilityNo cancel feeOn-time67%
KLMCheapest$1,145Average$1,317FlexibilityNo cancel feeOn-time75%

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