$357+ 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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — BCN
May 24 — May 311
Round-trip
1 adult, Economy
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Find cheap flights from Boise to Barcelona with Cheapflights
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Cheapest flights from Boise to BarcelonaExplore 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 April 24, 2026.
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 April 24, 2026.
This Expedia deal was found by Cheapflights users on 4/21. 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.
Sun 9/206:44 am
BOI
- BCN
1 stop19h 26m
Iberia
Tue 10/139:30 pm
BCN
- BOI
2 stops31h 35m
Iberia
Deal found 4/21![Iberia logo]()
$785
This Booking.com deal was found by Cheapflights users on 4/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:30 am
BOI
- BCN
2 stops18h 50m
Air Canada
Tue 10/1312:15 pm
BCN
- BOI
2 stops41h 16m
Air Canada
Deal found 4/21![Air Canada logo]()
$792
This United Airlines deal was found by Cheapflights users on 4/22. 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.
Mon 9/218:15 am
BOI
- BCN
1 stop22h 05m
United Airlines
Fri 10/23:15 pm
BCN
- BOI
1 stop15h 51m
United Airlines
Deal found 4/22![United Airlines logo]()
$804
This United Airlines deal was found by Cheapflights users on 4/22. 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.
Sun 9/207:01 pm
BOI
- BCN
1 stop35h 19m
United Airlines
Fri 10/23:15 pm
BCN
- BOI
1 stop15h 51m
United Airlines
Deal found 4/22![United Airlines logo]()
$809
This United Airlines deal was found by Cheapflights users on 4/21. 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 11/75:22 pm
BOI
- BCN
2 stops32h 13m
United Airlines
Tue 11/173:05 pm
BCN
- BOI
1 stop16h 01m
United Airlines
Deal found 4/21![United Airlines logo]()
$813
This United Airlines deal was found by Cheapflights users on 4/22. 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.
Tue 9/227:01 pm
BOI
- BCN
1 stop35h 19m
United Airlines
Tue 10/63:15 pm
BCN
- BOI
2 stops32h 16m
United Airlines
Deal found 4/22![United Airlines logo]()
$814
This American Airlines deal was found by Cheapflights users on 4/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:00 am
BOI
- BCN
1 stop17h 50m
Multiple Airlines
Mon 11/910:40 am
BCN
- BOI
2 stops20h 15m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$828
This Air Canada deal was found by Cheapflights users on 4/22. 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.
Sat 9/195:44 pm
BOI
- BCN
2 stops31h 36m
Air Canada
Fri 10/21:15 pm
BCN
- BOI
2 stops32h 10m
Air Canada
Deal found 4/22![Air Canada logo]()
$832
This American Airlines deal was found by Cheapflights users on 4/21. 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 8/1012:17 pm
BOI
- BCN
2 stops18h 08m
American Airlines
Fri 8/2110:45 am
BCN
- BOI
1 stop19h 35m
American Airlines
Deal found 4/21![American Airlines logo]()
$833
This United Airlines deal was found by Cheapflights users on 4/19. 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.
Mon 11/912:29 pm
BOI
- BCN
1 stop16h 41m
United Airlines
Fri 11/133:05 pm
BCN
- BOI
1 stop16h 01m
United Airlines
Deal found 4/19![United Airlines logo]()
$834
This Air Canada deal was found by Cheapflights users on 4/19. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/94:05 pm
BOI
- BCN
2 stops33h 30m
Air Canada
Fri 11/131:35 pm
BCN
- BOI
2 stops28h 08m
Air Canada
Deal found 4/19![Air Canada logo]()
$836
Best flights from Boise to BarcelonaDiscover carefully curated flight deals from Boise to Barcelona that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 24, 2026.
Discover carefully curated flight deals from Boise to Barcelona that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 24, 2026.
This CheapOair deal was found by Cheapflights users on 4/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/176:30 am
BOI
- BCN
2 stops42h 50m
Air Canada
Tue 5/2612:15 pm
BCN
- BOI
2 stops37h 41m
Air Canada
Deal found 4/19![Air Canada logo]()
$949
This United Airlines deal was found by Cheapflights users on 4/19. 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.
Sun 5/178:34 am
BOI
- BCN
2 stops40h 46m
United Airlines
Tue 5/263:15 pm
BCN
- BOI
1 stop28h 17m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,072
This KLM deal was found by Cheapflights users on 4/19. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1910:39 am
BOI
- BCN
1 stop16h 31m
KLM
Tue 5/2611:10 am
BCN
- BOI
2 stops19h 03m
KLM
Deal found 4/19![KLM logo]()
$1,091
This Delta deal was found by Cheapflights users on 4/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1910:39 am
BOI
- BCN
2 stops20h 11m
Delta
Tue 5/2611:10 am
BCN
- BOI
2 stops20h 45m
Delta
Deal found 4/19![Delta logo]()
$1,106
This United Airlines deal was found by Cheapflights users on 4/23. 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.
Tue 7/77:05 pm
BOI
- BCN
1 stop35h 15m
United Airlines
Tue 7/141:15 pm
BCN
- BOI
2 stops54h 17m
United Airlines
Deal found 4/23![United Airlines logo]()
$1,142
This Delta deal was found by Cheapflights users on 4/21. 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 7/75:20 am
BOI
- BCN
2 stops19h 25m
Delta
Tue 7/1410:55 am
BCN
- BOI
2 stops21h 10m
Delta
Deal found 4/21![Delta logo]()
$1,189
This United Airlines deal was found by Cheapflights users on 4/19. 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.
Sat 6/66:30 am
BOI
- BCN
2 stops17h 30m
United Airlines
Sat 6/1312:15 pm
BCN
- BOI
2 stops36h 29m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,200
Last-minute flights from Boise to BarcelonaDiscover last-minute flight deals from Boise to Barcelona. Data last updated April 24, 2026 and is based on user searches.
Discover last-minute flight deals from Boise to Barcelona. Data last updated April 24, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 4/20. 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.
Fri 4/2412:04 pm
BOI
- BCN
1 stop17h 11m
United Airlines
Thu 4/3012:15 pm
BCN
- BOI
2 stops38h 56m
United Airlines
Deal found 4/20![United Airlines logo]()
$984
This Expedia deal was found by Cheapflights users on 4/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/62:57 pm
BOI
- BCN
2 stops17h 08m
Multiple Airlines
Sat 5/910:25 am
BCN
- BOI
2 stops20h 37m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$876
This CheapOair deal was found by Cheapflights users on 4/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/176:30 am
BOI
- BCN
2 stops42h 50m
Air Canada
Tue 5/2612:15 pm
BCN
- BOI
2 stops37h 41m
Air Canada
Deal found 4/19![Air Canada logo]()
$949
This United Airlines deal was found by Cheapflights users on 4/23. 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.
Sun 5/178:34 am
BOI
- BCN
2 stops40h 46m
United Airlines
Tue 5/261:15 pm
BCN
- BOI
2 stops40h 20m
United Airlines
Deal found 4/23![United Airlines logo]()
$1,057
This KLM deal was found by Cheapflights users on 4/19. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1910:39 am
BOI
- BCN
1 stop16h 31m
KLM
Tue 5/2611:10 am
BCN
- BOI
2 stops19h 03m
KLM
Deal found 4/19![KLM logo]()
$1,091
One-way flights from Boise to BarcelonaSearch for one-way flight options from Boise to Barcelona. Find affordable one-way fares based on user searches. Data last updated April 24, 2026.
Search for one-way flight options from Boise to Barcelona. Find affordable one-way fares based on user searches. Data last updated April 24, 2026.
This American Airlines deal was found by Cheapflights users on 4/21. 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 10/122:21 pm
BOI
- BCN
2 stops18h 04m
American Airlines
Deal found 4/21![American Airlines logo]()
$357
This Iberia deal was found by Cheapflights users on 4/20. 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.
Mon 10/126:44 am
BOI
- BCN
1 stop19h 26m
Iberia
Deal found 4/20![Iberia logo]()
$360
This KLM deal was found by Cheapflights users on 4/20. 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 10/138:40 am
BOI
- BCN
1 stop18h 30m
KLM
Deal found 4/20![KLM logo]()
$392
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/319:00 am
BOI
- BCN
3 stops45h 40m
Multiple Airlines
Deal found 4/23![Multiple Airlines logo]()
$521
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/18:51 pm
BOI
- BCN
3 stops34h 14m
Multiple Airlines
Deal found 4/23![Multiple Airlines logo]()
$528
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:13 pm
BOI
- BCN
3 stops45h 57m
Multiple Airlines
Deal found 4/23![Multiple Airlines logo]()
$559
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/118:47 pm
BOI
- BCN
2 stops32h 33m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$668
Find 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 April 24, 2026.
Round-trip from | $785 (Expedia) |
|---|---|
One-way from | $357 (American Airlines) |
Popular in | June |
Cheapest in | February |
Average price | $814 |
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 April 24, 2026.
Use the filters below to find and compare flights from Boise to Barcelona that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Sun 5/17
6:30 am-9:20 am
2 stops42h 50m
Barcelona-El Prat
Tue 5/26
12:15 pm-5:56 pm
2 stops37h 41m
$949
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Sun 5/17
8:34 am-9:20 am
2 stops40h 46m
Barcelona-El Prat
Tue 5/26
3:15 pm-11:32 am
1 stop28h 17m
$1,072
Quickest round-trip
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Tue 5/19
10:39 am-11:10 am
1 stop16h 31m
Barcelona-El Prat
Tue 5/26
11:10 am-10:13 pm
2 stops19h 03m
$1,091
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Tue 5/19
10:39 am-2:50 pm
2 stops20h 11m
Barcelona-El Prat
Tue 5/26
11:10 am-11:55 pm
2 stops20h 45m
$1,106
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Tue 7/7
7:05 pm-2:20 pm
1 stop35h 15m
Barcelona-El Prat
Tue 7/14
1:15 pm-11:32 am
2 stops54h 17m
$1,142
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Tue 7/7
5:20 am-8:45 am
2 stops19h 25m
Barcelona-El Prat
Tue 7/14
10:55 am-12:05 am
2 stops21h 10m
$1,189
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Sat 6/6
6:30 am-8:00 am
2 stops17h 30m
Barcelona-El Prat
Sat 6/13
12:15 pm-4:44 pm
2 stops36h 29m
$1,200
Cheapest one-way
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Wed 7/1
6:13 pm-12:10 am
3 stops45h 57m
$559
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Sun 5/31
9:00 am-2:30 pm
3 stops45h 30m
$570
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Mon 6/1
4:19 pm-12:30 pm
2 stops36h 11m
$653
Showing 1-10 of 15 resultsSorted by cheapest first
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.
BOI-S37
BOI-BCN
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
BOI-S37
BOI-BCN
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 $467). Flying from Boise to Barcelona in December is currently the most expensive (average of $1,153). 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.
How much does it cost to fly round-trip from Boise to Barcelona?
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 April 24, 2026.
Read through reviews of airlines operating flights from Boise to Barcelona, such as Delta,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Entertainment
7.8
Crew
8.5
Boarding
8.1
Food
7.2
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Entertainment
7.8
Crew
8.5
Boarding
8.1
Food
7.2
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Entertainment
7.8
Crew
8.5
Boarding
8.1
Food
7.2
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Entertainment
7.8
Crew
8.5
Boarding
8.1
Food
7.2
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Entertainment
7.8
Crew
8.5
Boarding
8.1
Food
7.2
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Entertainment
7.8
Crew
8.5
Boarding
8.1
Food
7.2
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
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.
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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for Boise to Barcelona
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Complete your trip
Complete your trip to Barcelona by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Boise to Barcelona by cabin class
Find flights from Boise to Barcelona, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boise and Barcelona flights
Browse other Boise and Barcelona flight options. Last updated on April 24, 2026.
Other flights from Boise
Browse through other flights departing from Boise. Flights are based on user searches made on Cheapflights and were last updated on April 24, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 April 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$483 | Average$940 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$498 | Average$812 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$599 | Average$999 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$634 | Average$1,029 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$651 | Average$857 | FlexibilityNo cancel fee | On-time67% |