HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Spain

$357+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — MAD
Jul 20 — Jul 271
Mon 7/20
Mon 7/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Idaho to Spain with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 June 20, 2026.

This FlightHub deal was found by Cheapflights users on 6/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:29 pm
BOI
-
BIO
2 stops21h 36m
Lufthansa
Thu 11/266:45 am
BIO
-
BOI
2 stops22h 45m
Lufthansa
Deal found 6/19$731
This Justfly.com deal was found by Cheapflights users on 6/18. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/102:43 pm
BOI
-
BIO
2 stops43h 22m
Lufthansa
Fri 11/137:25 am
BIO
-
BOI
2 stops21h 51m
Lufthansa
Deal found 6/18$738
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:42 pm
BOI
-
BIO
2 stops20h 43m
Delta
Thu 11/266:50 am
BIO
-
BOI
2 stops16h 40m
Delta
Deal found 6/16$741
This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:50 pm
BOI
-
BIO
2 stops20h 35m
United Airlines
Tue 10/136:50 am
BIO
-
BOI
2 stops23h 43m
United Airlines
Deal found 6/15$742
This Air France deal was found by Cheapflights users on 6/18. 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.
Wed 11/181:43 pm
BOI
-
BIO
2 stops19h 42m
Air France
Fri 11/277:10 am
BIO
-
BOI
2 stops17h 39m
Air France
Deal found 6/18$748
This United Airlines deal was found by Cheapflights users on 6/19. 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 10/1311:10 am
GEG
-
BCN
1 stop17h 05m
United Airlines
Fri 10/2312:15 pm
BCN
-
GEG
2 stops36h 07m
United Airlines
Deal found 6/19$749
This Gotogate deal was found by Cheapflights users on 6/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/126:25 am
BOI
-
BCN
2 stops42h 55m
Air Canada
Wed 10/2112:15 pm
BCN
-
BOI
2 stops41h 20m
Air Canada
Deal found 6/19$757
This FlightHub deal was found by Cheapflights users on 6/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1312:44 pm
GEG
-
BCN
2 stops24h 26m
Multiple Airlines
Fri 10/238:00 am
BCN
-
GEG
2 stops22h 25m
Multiple Airlines
Deal found 6/15$759
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Mon 9/286:50 pm
BOI
-
BIO
2 stops20h 35m
United Airlines
Mon 10/122:10 pm
BIO
-
BOI
2 stops41h 49m
United Airlines
Deal found 6/16$763
This Expedia deal was found by Cheapflights users on 6/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1210:52 am
BOI
-
BCN
2 stops27h 18m
Multiple Airlines
Wed 8/268:00 am
BCN
-
BOI
2 stops22h 27m
Multiple Airlines
Deal found 6/16$766
This Priceline deal was found by Cheapflights users on 6/18. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:00 am
GEG
-
BCN
2 stops20h 00m
Iberia
Wed 10/2810:40 am
BCN
-
GEG
1 stop18h 07m
Iberia
Deal found 6/18$766
This KLM deal was found by Cheapflights users on 6/17. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/139:10 am
GEG
-
BCN
1 stop17h 00m
KLM
Fri 10/231:20 pm
BCN
-
GEG
1 stop16h 45m
KLM
Deal found 6/17$769

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 June 20, 2026.

Round-trip from

$731
(FlightHub)

One-way from

$357
(American Airlines)

Popular in

June

Cheapest in

February

Average price

$3,383
From Idaho to Spain
Search Deals
One-way flight from Idaho to Spain
Search Deals
Highest demand for flights based on searches. 39% potential increase in price ($759 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 21% potential price decrease ($203 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 20, 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

Wed 11/18

12:29 pm-6:05 pm

2 stops21h 36m

Bilbao

Thu 11/26

6:45 am-9:30 pm

2 stops22h 45m

$731

BoiseBilbao

BOI - BIO

BOIBIO

Boise Air Term. Gowen Fld

Tue 11/10

2:43 pm-6:05 pm

2 stops43h 22m

Bilbao

Fri 11/13

7:25 am-9:16 pm

2 stops21h 51m

$738

BoiseBilbao

BOI - BIO

BOIBIO

Boise Air Term. Gowen Fld

Wed 11/18

12:42 pm-5:25 pm

2 stops20h 43m

Bilbao

Thu 11/26

6:50 am-3:30 pm

2 stops16h 40m

$741

BoiseBilbao

BOI - BIO

BOIBIO

Boise Air Term. Gowen Fld

Tue 11/10

8:22 am-11:05 pm

2 stops30h 43m

Bilbao

Fri 11/13

6:45 am-5:54 pm

2 stops19h 09m

$743

BoiseBilbao

BOI - BIO

BOIBIO

Boise Air Term. Gowen Fld

Wed 11/18

12:32 pm-11:05 pm

2 stops26h 33m

Bilbao

Fri 11/27

6:45 am-10:42 pm

2 stops23h 57m

$743

BoiseBilbao

BOI - BIO

BOIBIO

Boise Air Term. Gowen Fld

Wed 11/18

1:43 pm-5:25 pm

2 stops19h 42m

Bilbao

Fri 11/27

7:10 am-4:49 pm

2 stops17h 39m

$748

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Mon 10/12

1:15 pm-2:50 pm

2 stops17h 35m

Barcelona-El Prat

Wed 10/21

11:00 am-10:41 pm

1 stop19h 41m

$773

JacksonBarcelona

JAC - BCN

JACBCN

Jackson Hole

Tue 10/6

7:41 am-2:20 pm

1 stop22h 39m

Barcelona-El Prat

Tue 10/20

6:40 am-8:46 pm

2 stops22h 06m

$773

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Sun 12/6

5:22 pm-8:20 am

2 stops30h 58m

Barcelona-El Prat

Wed 12/9

11:00 am-9:43 am

2 stops30h 43m

$774

SpokaneBarcelona

GEG - BCN

GEGBCN

Spokane

Wed 10/14

1:05 pm-2:20 pm

1 stop16h 15m

Barcelona-El Prat

Wed 10/28

3:05 pm-10:55 am

1 stop27h 50m

$775

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/20

Showing 1-10 of 53 resultsSorted by cheapest first
1
2
3
...
6

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 $1,000). 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 20h 43m. Lufthansa provides one of the quickest options available for as low as $741. There are 5157 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 $1,000). 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.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Charles de Gaulle flights
John F Kennedy Intl to Leonardo da Vinci/Fiumicino flights
Newark to Charles de Gaulle flights
Newark to Leonardo da Vinci/Fiumicino flights
LaGuardia to Heathrow flights
Newark to Gatwick flights
John F Kennedy Intl to London City flights
John F Kennedy Intl to Gatwick flights
John F Kennedy Intl to Istanbul flights
Newark to Athens flights
John F Kennedy Intl to Lisbon flights
Dulles Intl to Heathrow flights
John F Kennedy Intl to Barcelona-El Prat flights
John F Kennedy Intl to Madrid flights
Boston to Heathrow flights
Newark to Lisbon flights
John F Kennedy Intl to Athens flights
Los Angeles to Heathrow flights
John F Kennedy Intl to Orly flights
John F Kennedy Intl to Malpensa flights
Newark to Madrid flights
Newark to Orly flights
Baltimore to Heathrow flights
Newark to Barcelona-El Prat flights
LaGuardia to Gatwick flights
Newark to Malpensa flights
John F Kennedy Intl to Dublin flights
Newark to Dublin flights
Los Angeles to Charles de Gaulle flights
John F Kennedy Intl to Frankfurt flights
Newark to Stansted flights
O'Hare Intl to Heathrow flights
Dallas/Fort Worth to Heathrow flights
Los Angeles to Leonardo da Vinci/Fiumicino flights
John F Kennedy Intl to Frederic Chopin flights
Miami to Madrid flights
San Francisco to Heathrow flights
Dulles Intl to Charles de Gaulle flights
Newark to Luton flights
Newark to London City flights
Newark to Frankfurt flights
Seattle to Heathrow flights
O'Hare Intl to Leonardo da Vinci/Fiumicino flights
Boston to Charles de Gaulle flights

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 June 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$483Average$872FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$493Average$931FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$541Average$998FlexibilityNo cancel feeOn-time71%
DeltaCheapest$599Average$961FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$856Average$869FlexibilityNo cancel feeOn-time67%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights