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$356+ 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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — MAD
Jun 8 — Jun 151
Mon 6/8
Mon 6/15
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 May 9, 2026.

This United Airlines deal was found by Cheapflights users on 5/7. 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 11/185:00 am
BOI
-
BIO
2 stops29h 05m
United Airlines
Fri 11/276:45 am
BIO
-
BOI
2 stops19h 10m
United Airlines
Deal found 5/7$743
This Delta deal was found by Cheapflights users on 5/8. 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.
Tue 9/292:45 pm
BOI
-
BIO
2 stops18h 45m
Delta
Tue 10/1310:30 am
BIO
-
BOI
2 stops20h 38m
Delta
Deal found 5/8$749
This United Airlines deal was found by Cheapflights users on 5/8. 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 9/295:00 am
BOI
-
BIO
2 stops34h 05m
United Airlines
Tue 10/136:50 am
BIO
-
BOI
2 stops22h 41m
United Airlines
Deal found 5/8$756
This United Airlines deal was found by Cheapflights users on 5/6. 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.
Sun 11/85:00 am
BOI
-
BIO
2 stops34h 05m
United Airlines
Tue 11/1011:35 am
BIO
-
BOI
2 stops43h 30m
United Airlines
Deal found 5/6$761
This United Airlines deal was found by Cheapflights users on 5/7. 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 9/287:05 pm
BOI
-
BIO
2 stops20h 20m
United Airlines
Mon 10/122:10 pm
BIO
-
BOI
2 stops41h 42m
United Airlines
Deal found 5/7$764
This Finnair deal was found by Cheapflights users on 5/6. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/221:18 pm
BOI
-
BCN
1 stop13h 17m
Finnair
Tue 9/2910:45 am
BCN
-
BOI
1 stop19h 32m
Finnair
Deal found 5/6$769
This American Airlines deal was found by Cheapflights users on 5/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/112:57 pm
BOI
-
BCN
2 stops19h 28m
American Airlines
Tue 10/2010:15 am
BCN
-
BOI
2 stops20h 02m
American Airlines
Deal found 5/5$782
This Expedia deal was found by Cheapflights users on 5/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1312:45 pm
GEG
-
BCN
2 stops24h 55m
Iberia
Fri 10/237:40 am
BCN
-
GEG
2 stops22h 07m
Iberia
Deal found 5/5$782
This British Airways deal was found by Cheapflights users on 5/7. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/133:44 pm
GEG
-
BCN
2 stops19h 46m
Multiple Airlines
Fri 10/237:40 am
BCN
-
GEG
2 stops22h 07m
Multiple Airlines
Deal found 5/7$784
This Air France deal was found by Cheapflights users on 5/6. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/261:43 pm
BOI
-
AGP
2 stops19h 12m
Multiple Airlines
Wed 12/24:05 pm
AGP
-
BOI
2 stops34h 28m
Multiple Airlines
Deal found 5/6$793
This Iberia deal was found by Cheapflights users on 5/7. 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 9/292:55 pm
BOI
-
MAD
1 stop15h 30m
Iberia
Wed 10/712:20 pm
MAD
-
BOI
1 stop17h 57m
Iberia
Deal found 5/7$794
This Iberia deal was found by Cheapflights users on 5/6. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/85:25 am
GEG
-
MAD
1 stop15h 45m
Multiple Airlines
Thu 11/121:00 pm
MAD
-
GEG
1 stop16h 55m
Multiple Airlines
Deal found 5/6$794

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 May 9, 2026.

Round-trip from

$744
(United Airlines)

One-way from

$356
(eDestinos)

Popular in

June

Cheapest in

February

Average price

$1,210
From Idaho to Spain
Search Deals
One-way flight from Idaho to Spain
Search Deals
Highest demand for flights based on searches. 29% potential increase in price ($399 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($70 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 9, 2026.
Use the filters below to find and compare flights from Idaho to Spain that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoiseBilbao

BOI - BIO

BOIBIO

Boise Air Term. Gowen Fld

Tue 9/29

8:40 am-4:00 pm

2 stops23h 20m

Bilbao

Tue 10/13

6:50 am-11:52 pm

2 stops25h 02m

$744

BoiseBilbao

BOI - BIO

BOIBIO

Boise Air Term. Gowen Fld

Tue 9/29

2:45 pm-5:30 pm

2 stops18h 45m

Bilbao

Tue 10/13

7:10 am-11:08 pm

2 stops23h 58m

$749

BoiseBilbao

BOI - BIO

BOIBIO

Boise Air Term. Gowen Fld

Mon 9/28

7:05 pm-11:25 pm

2 stops20h 20m

Bilbao

Mon 10/12

2:10 pm-11:52 pm

2 stops41h 42m

$764

SpokaneBarcelona

GEG - BCN

GEGBCN

Spokane

Tue 10/13

12:45 pm-10:40 pm

2 stops24h 55m

Barcelona-El Prat

Fri 10/23

7:40 am-8:47 pm

2 stops22h 07m

$782

JacksonMadrid

JAC - MAD

JACMAD

Jackson Hole

Tue 10/6

1:46 pm-1:20 pm

2 stops15h 34m

Madrid Barajas

Tue 10/20

3:25 pm-11:54 am

2 stops28h 29m

$799

SpokaneMadrid

GEG - MAD

GEGMAD

Spokane

Tue 9/22

6:00 am-2:25 pm

1 stop23h 25m

Madrid Barajas

Wed 10/7

3:55 pm-11:58 am

1 stop29h 03m

$800

SpokaneMálaga

GEG - AGP

GEGAGP

Spokane

Fri 10/9

7:55 am-6:40 pm

2 stops25h 45m

Malaga

Fri 10/16

5:55 am-5:09 pm

2 stops20h 14m

$800

JacksonMadrid

JAC - MAD

JACMAD

Jackson Hole

Tue 10/6

12:29 pm-1:50 pm

1 stop17h 21m

Madrid Barajas

Tue 10/20

5:30 pm-11:54 am

2 stops26h 24m

$801

BoiseBilbao

BOI - BIO

BOIBIO

Boise Air Term. Gowen Fld

Mon 9/28

2:45 pm-4:30 pm

2 stops17h 45m

Bilbao

Mon 10/12

10:30 am-11:08 pm

2 stops20h 38m

$804

JacksonBarcelona

JAC - BCN

JACBCN

Jackson Hole

Tue 10/6

1:46 pm-6:40 pm

2 stops20h 54m

Barcelona-El Prat

Tue 10/20

6:30 pm-12:33 pm

2 stops26h 03m

$805

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/4

Showing 1-10 of 60 resultsSorted by cheapest first
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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, February is the cheapest month in which you can book a flight from Idaho to Spain (average of $467). 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 15h 34m. United Airlines provides one of the quickest options available for as low as $799. There are 5070 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, February is the cheapest month in which you can book a flight from Idaho to Spain (average of $467). 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

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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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Top 5 airlines flying from Idaho to Spain

Discover the top 5 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 May 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$483Average$782FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$493Average$710FlexibilityNo cancel feeOn-time69%
DeltaCheapest$528Average$869FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$541Average$974FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$799Average$865FlexibilityNo cancel feeOn-time67%

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