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$318+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — BCN
Oct 23 — Oct 301
Thu 10/23
Thu 10/30
1 adult, Economy
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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 September 23, 2025.

Round-trip from

$560
(United Airlines)

One-way from

$318
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$974
From Boise Air Term. Gowen Fld to Barcelona
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One-way flight from Boise Air Term. Gowen Fld to Barcelona
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Highest demand for flights based on searches. 25% potential increase in price ($343 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($59 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 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 September 23, 2025.

This United Airlines deal was found by Cheapflights users on 9/22. 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 10/296:20 amBOI - BCN
2 stops19h 15mUnited Airlines
Fri 11/141:35 pmBCN - BOI
2 stops41h 10mUnited Airlines
Deal found 9/22$560
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Sat 11/12:11 pmBOI - BCN
2 stops36h 24mUnited Airlines
Tue 11/111:35 pmBCN - BOI
2 stops30h 04mUnited Airlines
Deal found 9/23$565
This Air Canada deal was found by Cheapflights users on 9/22. 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.
Wed 10/296:20 amBOI - BCN
2 stops19h 15mMultiple Airlines
Wed 11/121:35 pmBCN - BOI
3 stops31h 50mMultiple Airlines
Deal found 9/22$567
This Air Canada deal was found by Cheapflights users on 9/22. 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.
Wed 10/296:15 amBOI - BCN
3 stops19h 20mAir Canada
Wed 11/121:35 pmBCN - BOI
3 stops31h 50mAir Canada
Deal found 9/22$573
This United Airlines deal was found by Cheapflights users on 9/22. 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 10/298:17 amBOI - BCN
1 stop21h 53mUnited Airlines
Wed 11/123:05 pmBCN - BOI
1 stop15h 40mUnited Airlines
Deal found 9/22$583
This United Airlines deal was found by Cheapflights users on 9/22. 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 11/56:20 amBOI - BCN
2 stops19h 15mUnited Airlines
Wed 11/1910:30 amBCN - BOI
2 stops20h 58mUnited Airlines
Deal found 9/22$587
This Air Canada deal was found by Cheapflights users on 9/23. 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.
Sat 11/812:35 pmBOI - BCN
2 stops37h 00mMultiple Airlines
Mon 11/171:35 pmBCN - BOI
2 stops30h 04mMultiple Airlines
Deal found 9/23$610
This United Airlines deal was found by Cheapflights users on 9/22. 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 11/198:25 amBOI - BCN
2 stops23h 55mUnited Airlines
Thu 11/273:05 pmBCN - BOI
1 stop28h 34mUnited Airlines
Deal found 9/22$616
This United Airlines deal was found by Cheapflights users on 9/22. 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 11/1212:35 pmBOI - BCN
1 stop16h 35mUnited Airlines
Tue 11/253:05 pmBCN - BOI
1 stop15h 40mUnited Airlines
Deal found 9/22$618
This Air Canada deal was found by Cheapflights users on 9/23. 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.
Wed 11/196:20 amBOI - BCN
2 stops19h 15mMultiple Airlines
Thu 11/271:35 pmBCN - BOI
2 stops31h 55mMultiple Airlines
Deal found 9/23$621

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 September 23, 2025.
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

Wed 10/29

6:20 am-8:35 am

2 stops19h 15m

Barcelona-El Prat

Fri 11/14

1:35 pm-10:45 pm

2 stops41h 10m

$560

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Wed 10/29

6:20 am-8:35 am

2 stops19h 15m

Barcelona-El Prat

Fri 11/14

1:35 pm-1:25 pm

3 stops31h 50m

$567

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Wed 11/5

6:20 am-9:35 am

2 stops19h 15m

Barcelona-El Prat

Wed 11/19

3:05 pm-10:45 pm

1 stop15h 40m

$583

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Wed 10/29

8:17 am-1:10 pm

1 stop21h 53m

Barcelona-El Prat

Wed 11/12

3:05 pm-10:45 pm

1 stop15h 40m

$583

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Wed 11/5

6:20 am-9:35 am

2 stops19h 15m

Barcelona-El Prat

Wed 11/12

3:05 pm-10:45 pm

1 stop15h 40m

$583

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Sat 11/1

2:40 pm-9:35 am

2 stops35h 55m

Barcelona-El Prat

Tue 11/11

1:35 pm-1:44 pm

3 stops32h 09m

$588

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Wed 11/19

8:25 am-7:50 pm

2 stops27h 25m

Barcelona-El Prat

Thu 11/27

3:05 pm-11:39 am

1 stop28h 34m

$616

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Wed 11/12

12:35 pm-1:10 pm

1 stop16h 35m

Barcelona-El Prat

Tue 11/25

3:05 pm-10:45 pm

1 stop15h 40m

$618

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Wed 11/12

8:50 am-8:50 pm

3 stops28h 00m

$318

BoiseBarcelona

BOI - BCN

BOIBCN

Boise Air Term. Gowen Fld

Wed 11/12

6:20 am-9:35 am

2 stops19h 15m

$464

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/23

Showing 1-10 of 12 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, January is the cheapest month in which you can book a flight from Boise to Barcelona (average of $523). Flying from Boise to Barcelona in June is currently the most expensive (average of $1,060). 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 BOI to BCN?

Find hourly flight availability from Boise to Barcelona. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 23, 2025.

A simple way to save on the total cost of your ticket is to fly from Boise to Barcelona in the evening. If you’re flexible enough to do this you can expect to save up to 17% on your trip compared to booking a flight in the morning.

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 September 23, 2025.
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
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,326 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,928 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 4 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 19h 15m. Fly via United Airlines to get the fastest option. The distance between Boise and Barcelona is about 5431 mi.

  • 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 $607 and $637, respectively. United Airlines is currently priced 45% 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, January is the cheapest month in which you can book a flight from Boise to Barcelona (average of $523). Flying from Boise to Barcelona in June is currently the most expensive (average of $1,060). 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 Boise to Barcelona

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

Top 4 airlines flying from Boise to Barcelona

Discover the top 4 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 September 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$552Average$890FlexibilityNo cancel feeOn-time69%
DeltaCheapest$607Average$954FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$637Average$972FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$641Average$1,041FlexibilityNo cancel feeOn-time71%

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