HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Barcelona

$310+ Cheap flights from Boise (BOI) to Barcelona

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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — BCN
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boise to Barcelona 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 Boise to Barcelona

Discover tips and strategies to find the most affordable flight options for your journey from Boise (BOI) to Barcelona (S37). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 8, 2026.

Round-trip from

$424
(United Airlines)

One-way from

$310
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,292
From Boise Air Term. Gowen Fld to Barcelona
Search Deals
One-way flight from Boise Air Term. Gowen Fld to Barcelona
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($254 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Find flight deals from Boise to Barcelona

Cheapest flights from Boise to Barcelona
Explore the most affordable flight options available from Boise to Barcelona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 8, 2026.

This United Airlines deal was found by Cheapflights users on 1/7. 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.
Tue 2/310:48 amBOI - BCN
2 stops38h 47mUnited Airlines
Tue 2/101:35 pmBCN - BOI
2 stops38h 16mUnited Airlines
Deal found 1/7$424
This American Airlines deal was found by Cheapflights users on 1/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/31:58 pmBOI - BCN
2 stops16h 47mAmerican Airlines
Tue 2/1010:40 amBCN - BOI
1 stop16h 45mAmerican Airlines
Deal found 1/7$432
This Finnair deal was found by Cheapflights users on 1/7. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/37:20 amBOI - BCN
1 stop17h 30mFinnair
Wed 2/1810:40 amBCN - BOI
1 stop19h 42mFinnair
Deal found 1/7$435
This American Airlines deal was found by Cheapflights users on 1/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/31:58 pmBOI - BCN
2 stops19h 22mAmerican Airlines
Wed 2/1812:30 pmBCN - BOI
2 stops19h 08mAmerican Airlines
Deal found 1/7$436
This Delta deal was found by Cheapflights users on 1/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/35:45 amBOI - BCN
2 stops18h 55mDelta
Wed 2/1110:55 amBCN - BOI
2 stops34h 16mDelta
Deal found 1/7$440
This Finnair deal was found by Cheapflights users on 1/7. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/117:20 amBOI - BCN
2 stops28h 35mFinnair
Wed 2/1810:40 amBCN - BOI
1 stop19h 42mFinnair
Deal found 1/7$443
This Delta deal was found by Cheapflights users on 1/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/45:40 amBOI - BCN
2 stops18h 20mDelta
Wed 2/1110:55 amBCN - BOI
1 stop33h 33mDelta
Deal found 1/7$445
This Iberia deal was found by Cheapflights users on 1/7. 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.
Wed 2/187:00 amBOI - BCN
1 stop17h 50mIberia
Wed 3/49:45 amBCN - BOI
2 stops20h 37mIberia
Deal found 1/7$451
This Delta deal was found by Cheapflights users on 1/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/187:30 amBOI - BCN
2 stops25h 35mDelta
Wed 3/410:15 amBCN - BOI
2 stops31h 35mDelta
Deal found 1/7$459
This Finnair deal was found by Cheapflights users on 1/7. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/207:00 amBOI - BCN
1 stop17h 50mFinnair
Fri 2/2710:40 amBCN - BOI
1 stop19h 42mFinnair
Deal found 1/7$460
This Delta deal was found by Cheapflights users on 1/8. 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.
Fri 2/205:50 amBOI - BCN
2 stops18h 10mDelta
Fri 2/2710:55 amBCN - BOI
2 stops30h 55mDelta
Deal found 1/8$465
This United Airlines deal was found by Cheapflights users on 1/6. 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.
Thu 3/58:39 amBOI - BCN
2 stops40h 56mUnited Airlines
Thu 3/1212:35 pmBCN - BOI
2 stops28h 31mUnited Airlines
Deal found 1/6$467

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boise to Barcelona 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 January 8, 2026.
Use the filters below to find and compare flights from Boise to Barcelona that are best for you.

Fly from

Boise

Fly to

Barcelona

Route

Depart

Return

Price

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Tue 2/3

10:48 am-9:35 am

2 stops38h 47m

Barcelona-El Prat

Tue 2/10

1:35 pm-7:51 pm

2 stops38h 16m

$424

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Tue 2/3

7:20 am-8:50 am

1 stop17h 30m

Barcelona-El Prat

Wed 2/11

10:40 am-9:18 pm

1 stop18h 38m

$435

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Tue 2/3

7:20 am-8:50 am

1 stop17h 30m

Barcelona-El Prat

Tue 2/10

10:40 am-7:25 pm

1 stop16h 45m

$435

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Tue 2/3

5:45 am-8:40 am

2 stops18h 55m

Barcelona-El Prat

Wed 2/11

10:55 am-1:11 pm

2 stops34h 16m

$440

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Fri 2/20

7:00 am-8:50 am

1 stop17h 50m

Barcelona-El Prat

Fri 2/27

10:40 am-10:22 pm

1 stop19h 42m

$460

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Fri 2/20

7:00 am-8:50 am

1 stop17h 50m

Barcelona-El Prat

Fri 2/27

10:40 am-10:22 pm

1 stop19h 42m

$460

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Fri 2/20

7:00 am-8:50 am

1 stop17h 50m

Barcelona-El Prat

Fri 2/27

10:40 am-10:22 pm

1 stop19h 42m

$460

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Fri 2/20

7:00 am-8:50 am

1 stop17h 50m

Barcelona-El Prat

Fri 2/27

3:05 pm-12:51 pm

2 stops29h 46m

$465

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Fri 2/20

5:50 am-8:00 am

2 stops18h 10m

Barcelona-El Prat

Fri 2/27

10:55 am-9:50 am

2 stops30h 55m

$465

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Mon 3/9

11:30 pm-7:00 am

2 stops24h 30m

Barcelona-El Prat

Mon 3/16

9:15 am-9:55 am

2 stops31h 40m

$465

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 17 results
1
2

Best time to book a flight from Boise to Barcelona

Have a flexible travel schedule? Discover the best time to fly to Barcelona from Boise 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 Boise to Barcelona

What is the cheapest month to book a flight from Boise to Barcelona?

Currently, February is the cheapest month in which you can book a flight from Boise to Barcelona (average of $482). Flying from Boise to Barcelona in December is currently the most expensive (average of $1,165). 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.

Reviews of airlines servicing Barcelona

Get insights into the airlines that provide service to Barcelona. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Barcelona. Reviews last updated January 8, 2026.
Read through reviews of airlines operating flights from Boise to Barcelona, such as Delta, Finnair, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,032 reviews

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,032 reviews
Delta
7.9
Good
8,032 reviews

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Finnair
7.6
Good
1,346 reviews
Delta
7.9
Good
8,032 reviews

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,142 reviews
Delta
7.9
Good
8,032 reviews

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,097 reviews
Delta
7.9
Good
8,032 reviews

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air Canada
7.1
Good
10,603 reviews
Delta
7.9
Good
8,032 reviews

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

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

  • What airport do you fly from for flights from Boise to Barcelona?

    Most people fly from Boise Air Term. Gowen Fld (BOI) if they book a flight from Boise to Barcelona. On average, Air Term. Gowen Fld has 0 outbound flights to Barcelona per day from 5 airlines. Boise Air Term. Gowen Fld is conveniently located just 3.3 mi from Boise’s city center.

  • How long is the flight from Boise to Barcelona?

    There are many flights that can get you from Boise to Barcelona in 17h 30m. Fly via United Airlines, Iberia, or Finnair to get the fastest option. The distance between Boise and Barcelona is about 5431 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Boise to Barcelona round-trip?

    Flying on United Airlines is currently your cheapest option to Barcelona, with prices starting at $552. Additional round-trip tickets that might be worth considering are offered by Delta and Finnair, with the lowest prices starting at $599 and $637, respectively. United Airlines is currently priced 43% below the average price you’ll pay for this route.

  • Can I find deals for flights from Boise to Barcelona that include hotel bookings?

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

  • How can I find direct flights from Boise to Barcelona?

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

  • Can I find deals for business class flights from Boise to Barcelona?

    Yes. Cheapflights offers flight deals from Boise to Barcelona 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 Boise to Barcelona?

    Currently, February is the cheapest month in which you can book a flight from Boise to Barcelona (average of $482). Flying from Boise to Barcelona in December is currently the most expensive (average of $1,165). 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 Boise to Barcelona

See prices for flight routes from nearby airports that may be better suited for you.
Boise to Barcelona-El Prat flights
Spokane to Barcelona-El Prat flights
Idaho Falls to Barcelona-El Prat flights
Jackson to Barcelona-El Prat flights

Top 5 airlines flying from Boise to Barcelona

Discover the top 5 airlines that operate flights from Boise to Barcelona. 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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$552Average$863FlexibilityNo cancel feeOn-time69%
DeltaCheapest$599Average$935FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$637Average$972FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$641Average$1,040FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$651Average$865FlexibilityNo 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.