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$322+ 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 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — MAD
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Idaho to Spain

Keep the following information in mind while searching for Idaho to Spain flight deals. Data was last updated September 15, 2025.

Round-trip from

$515
(lol.travel)

One-way from

$322
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,009
From Idaho to Spain
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One-way flight from Idaho to Spain
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Highest demand for flights based on searches. 25% potential increase in price ($342 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($58 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 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 September 15, 2025.

This lol.travel 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/272:31 pmBOI - MAD
2 stops34h 34mUnited Airlines
Wed 11/128:30 amMAD - BOI
2 stops22h 58mUnited Airlines
Deal found 9/15$515
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/215:00 amBOI - BCN
2 stops18h 50mAir Canada
Tue 10/712:10 pmBCN - BOI
2 stops39h 05mAir Canada
Deal found 9/13$530
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/227:09 pmBOI - MAD
2 stops27h 31mAir Canada
Tue 10/712:45 pmMAD - BOI
2 stops36h 13mAir Canada
Deal found 9/13$534
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/225:39 pmBOI - BCN
2 stops30h 11mAir Canada
Tue 10/712:10 pmBCN - BOI
2 stops43h 34mAir Canada
Deal found 9/13$535
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/235:00 amBOI - BCN
2 stops20h 20mAir Canada
Tue 10/712:10 pmBCN - BOI
2 stops43h 34mAir Canada
Deal found 9/13$536
This CheapOair deal was found by Cheapflights users on 9/14. 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 10/127:00 amBOI - BCN
2 stops42h 20mAir Canada
Fri 10/241:15 pmBCN - BOI
2 stops41h 15mAir Canada
Deal found 9/14$543
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/277:00 amBOI - MAD
1 stop19h 25mAmerican Airlines
Wed 11/121:00 pmMAD - BOI
2 stops31h 35mAmerican Airlines
Deal found 9/15$550
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/235:00 amBOI - BCN
2 stops18h 50mUnited Airlines
Tue 10/74:00 pmBCN - BOI
1 stop15h 44mUnited Airlines
Deal found 9/13$553
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/277:00 pmBOI - MAD
2 stops30h 00mMultiple Airlines
Wed 11/121:35 pmMAD - BOI
3 stops30h 04mMultiple Airlines
Deal found 9/15$556
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/245:00 amBOI - BCN
2 stops19h 20mUnited Airlines
Tue 10/711:15 amBCN - BOI
2 stops20h 29mUnited Airlines
Deal found 9/13$557
This Iberia deal was found by Cheapflights users on 9/13. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/187:00 amBOI - MAD
1 stop15h 15mIberia
Tue 12/912:40 pmMAD - BOI
1 stop17h 45mIberia
Deal found 9/13$557
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/227:09 pmBOI - BCN
1 stop34h 51mUnited Airlines
Tue 10/74:00 pmBCN - BOI
1 stop15h 44mUnited Airlines
Deal found 9/13$558

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 September 15, 2025.
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

BoiseMadrid

BOI - MAD

BOIMAD

Boise Air Term. Gowen Fld

Mon 10/27

2:31 pm-8:05 am

2 stops34h 34m

Madrid Barajas

Wed 11/12

8:30 am-11:28 pm

2 stops22h 58m

$515

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Sun 10/12

7:00 am-9:20 am

2 stops42h 20m

Barcelona-El Prat

Fri 10/24

1:15 pm-10:30 pm

2 stops41h 15m

$543

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Sun 1/25

5:40 am-8:00 am

2 stops18h 20m

Barcelona-El Prat

Tue 2/3

10:15 am-12:21 am

2 stops22h 06m

$557

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Sun 1/25

7:32 am-1:20 pm

2 stops21h 48m

Barcelona-El Prat

Tue 2/3

10:40 am-9:18 pm

1 stop18h 38m

$557

BoiseMadrid

BOI - MAD

BOIMAD

Boise Air Term. Gowen Fld

Tue 11/18

7:00 am-9:25 am

1 stop18h 25m

Madrid Barajas

Tue 12/9

12:40 pm-10:25 pm

1 stop17h 45m

$557

BoiseMadrid

BOI - MAD

BOIMAD

Boise Air Term. Gowen Fld

Tue 11/18

6:37 am-8:50 am

2 stops18h 13m

Madrid Barajas

Mon 12/8

12:55 am-12:20 pm

2 stops19h 25m

$562

BoiseMadrid

BOI - MAD

BOIMAD

Boise Air Term. Gowen Fld

Tue 11/18

5:35 am-8:00 am

2 stops18h 25m

Madrid Barajas

Tue 12/9

10:00 am-12:43 am

2 stops22h 43m

$562

BoiseMadrid

BOI - MAD

BOIMAD

Boise Air Term. Gowen Fld

Tue 11/18

7:00 am-8:50 am

2 stops17h 50m

Madrid Barajas

Tue 12/9

12:40 pm-10:25 pm

1 stop17h 45m

$562

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Mon 10/6

9:45 am-2:00 pm

1 stop20h 15m

Barcelona-El Prat

Wed 10/15

3:15 pm-9:24 pm

2 stops38h 09m

$568

SpokaneMadrid

GEG - MAD

GEGMAD

Spokane

Tue 2/17

1:45 pm-9:15 am

2 stops34h 30m

Madrid Barajas

Tue 2/24

11:15 am-10:47 am

2 stops32h 32m

$573

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 42 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, November is the cheapest month in which you can book a flight from Idaho to Spain (average of $543). Flying from Idaho to Spain in June is currently the most expensive (average of $1,054). 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 ES?

Find hourly flight availability from Idaho to Spain. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

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

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 18h 20m. United Airlines provides one of the quickest options available for as low as $557. There are 5431 mi between Idaho and Spain. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Idaho to Spain one-way?

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $468. Users have also found prices from $469 and $496 on KLM and United Airlines, respectively.

  • 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, November is the cheapest month in which you can book a flight from Idaho to Spain (average of $543). Flying from Idaho to Spain in June is currently the most expensive (average of $1,054). 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 Idaho to Spain

See prices for flight routes from nearby airports that may be better suited for you.
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Dallas/Fort Worth to Frankfurt flights
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Top 6 airlines flying from Idaho to Spain

Discover the top 6 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$570Average$775FlexibilityNo cancel feeOn-time69%
IberiaCheapest$586Average$807FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$591Average$966FlexibilityNo cancel feeOn-time71%
DeltaCheapest$617Average$1,025FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$637Average$972FlexibilityNo cancel feeOn-time76%
KLMCheapest$664Average$1,317FlexibilityNo cancel feeOn-time75%

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