$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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — BCN
Jul 9 — Jul 161
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 June 9, 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 June 9, 2026.
This American Airlines deal was found by Cheapflights users on 6/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/223:21 pm
BOI
- BCN
2 stops19h 19m
American Airlines
Wed 9/3010:45 am
BCN
- BOI
2 stops19h 42m
American Airlines
Deal found 6/6![American Airlines logo]()
$781
This United Airlines deal was found by Cheapflights users on 6/6. 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.
Tue 9/228:15 am
BOI
- BCN
1 stop22h 05m
United Airlines
Wed 9/301:15 pm
BCN
- BOI
2 stops34h 16m
United Airlines
Deal found 6/6![United Airlines logo]()
$784
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Mon 11/1612:29 pm
BOI
- BCN
1 stop16h 41m
United Airlines
Thu 11/193:05 pm
BCN
- BOI
1 stop16h 01m
United Airlines
Deal found 6/8![United Airlines logo]()
$799
This Orbitz deal was found by Cheapflights users on 6/4. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:02 am
BOI
- BCN
1 stop19h 08m
Iberia
Mon 10/59:20 pm
BCN
- BOI
2 stops31h 45m
Iberia
Deal found 6/4![Iberia logo]()
$802
This American Airlines deal was found by Cheapflights users on 6/5. 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.
Wed 11/187:00 am
BOI
- BCN
1 stop17h 50m
Multiple Airlines
Fri 11/2711:35 am
BCN
- BOI
2 stops20h 36m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$851
This United Airlines deal was found by Cheapflights users on 6/9. 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 8/1012:34 pm
BOI
- BCN
1 stop16h 41m
United Airlines
Fri 8/2112:15 pm
BCN
- BOI
2 stops37h 43m
United Airlines
Deal found 6/9![United Airlines logo]()
$861
This Air Canada deal was found by Cheapflights users on 6/9. 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 8/107:05 pm
BOI
- BCN
2 stops28h 55m
Air Canada
Fri 8/2112:15 pm
BCN
- BOI
2 stops33h 23m
Air Canada
Deal found 6/9![Air Canada logo]()
$864
This CheapOair deal was found by Cheapflights users on 6/9. 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 8/97:05 pm
BOI
- BCN
2 stops28h 55m
Air Canada
Thu 8/201:15 pm
BCN
- BOI
2 stops34h 16m
Air Canada
Deal found 6/9![Air Canada logo]()
$869
This United Airlines deal was found by Cheapflights users on 6/9. 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 8/97:05 pm
BOI
- BCN
1 stop35h 15m
United Airlines
Thu 8/201:15 pm
BCN
- BOI
2 stops30h 13m
United Airlines
Deal found 6/9![United Airlines logo]()
$871
This American Airlines deal was found by Cheapflights users on 6/5. 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 8/93:16 pm
BOI
- BCN
2 stops19h 09m
American Airlines
Thu 8/2010:45 am
BCN
- BOI
1 stop19h 35m
American Airlines
Deal found 6/5![American Airlines logo]()
$878
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 June 9, 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 June 9, 2026.
This United Airlines deal was found by Cheapflights users on 6/7. 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 11/1612:29 pm
BOI
- BCN
1 stop16h 41m
United Airlines
Thu 11/193:05 pm
BCN
- BOI
1 stop16h 01m
United Airlines
Deal found 6/7![United Airlines logo]()
$799
This United Airlines deal was found by Cheapflights users on 6/6. 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.
Mon 8/102:00 pm
BOI
- BCN
1 stop16h 20m
United Airlines
Fri 8/213:15 pm
BCN
- BOI
1 stop15h 38m
United Airlines
Deal found 6/6![United Airlines logo]()
$881
This United Airlines deal was found by Cheapflights users on 6/6. 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 8/65:46 pm
BOI
- BCN
2 stops16h 09m
United Airlines
Fri 8/2112:15 pm
BCN
- BOI
2 stops37h 43m
United Airlines
Deal found 6/6![United Airlines logo]()
$919
Last-minute flights from Boise to BarcelonaDiscover last-minute flight deals from Boise to Barcelona. Data last updated June 9, 2026 and is based on user searches.
Discover last-minute flight deals from Boise to Barcelona. Data last updated June 9, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 6/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/710:20 am
BOI
- BCN
2 stops20h 35m
Lufthansa
Tue 7/146:40 am
BCN
- BOI
2 stops24h 16m
Lufthansa
Deal found 6/9![Lufthansa logo]()
$961
This Delta deal was found by Cheapflights users on 6/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/78:42 am
BOI
- BCN
1 stop18h 28m
Delta
Tue 7/1410:55 am
BCN
- BOI
2 stops21h 10m
Delta
Deal found 6/5![Delta logo]()
$980
This Delta deal was found by Cheapflights users on 6/4. 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.
Sun 7/192:03 pm
BOI
- BCN
1 stop14h 47m
Delta
Sun 7/261:20 pm
BCN
- BOI
1 stop18h 31m
Delta
Deal found 6/4![Delta logo]()
$1,045
This United Airlines deal was found by Cheapflights users on 6/7. 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 7/2112:34 pm
BOI
- BCN
1 stop16h 41m
United Airlines
Tue 7/283:15 pm
BCN
- BOI
2 stops34h 41m
United Airlines
Deal found 6/7![United Airlines logo]()
$972
This Air France deal was found by Cheapflights users on 6/8. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/242:50 pm
BOI
- BCN
2 stops16h 45m
Multiple Airlines
Fri 7/311:20 pm
BCN
- BOI
1 stop16h 58m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$1,034
This Delta deal was found by Cheapflights users on 6/7. 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.
Fri 7/242:50 pm
BOI
- BCN
2 stops16h 45m
Delta
Fri 7/316:20 am
BCN
- BOI
2 stops20h 26m
Delta
Deal found 6/7![Delta logo]()
$1,044
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 June 9, 2026.
Search for one-way flight options from Boise to Barcelona. Find affordable one-way fares based on user searches. Data last updated June 9, 2026.
This American Airlines deal was found by Cheapflights users on 6/9. 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 10/122:55 pm
BOI
- BCN
2 stops18h 40m
American Airlines
Deal found 6/9![American Airlines logo]()
$357
This Iberia deal was found by Cheapflights users on 6/9. 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 6/9![Iberia logo]()
$360
This KLM deal was found by Cheapflights users on 6/9. 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 10/1310:38 am
BOI
- BCN
1 stop16h 32m
KLM
Deal found 6/9![KLM logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/211:24 pm
BOI
- BCN
3 stops48h 31m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$404
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Tue 9/294:20 pm
BOI
- BCN
3 stops23h 39m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$442
This American Airlines deal was found by Cheapflights users on 6/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/213:10 pm
BOI
- BCN
2 stops19h 30m
American Airlines
Deal found 6/8![American Airlines logo]()
$460
This TravelUp deal was found by Cheapflights users on 6/8. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/218:25 am
BOI
- BCN
1 stop20h 50m
Lufthansa
Deal found 6/8![Lufthansa logo]()
$461
This Mytrip deal was found by Cheapflights users on 6/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:30 am
BOI
- BCN
2 stops42h 50m
Air Canada
Deal found 6/4![Air Canada logo]()
$472
This United Airlines deal was found by Cheapflights users on 6/4. 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 8/87:05 pm
BOI
- BCN
1 stop35h 15m
United Airlines
Deal found 6/4![United Airlines logo]()
$475
This Air Canada deal was found by Cheapflights users on 6/9. 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.
Tue 10/135:00 am
BOI
- BCN
3 stops20h 20m
Air Canada
Deal found 6/9![Air Canada logo]()
$514
This Kiwi.com deal was found by Cheapflights users on 6/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/275:57 am
BOI
- BCN
3 stops35h 53m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$617
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 June 9, 2026.
Round-trip from | $781 (American Airlines) |
|---|---|
One-way from | $357 (American Airlines) |
Popular in | June |
Cheapest in | February |
Average price | $2,554 |
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 June 9, 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
Mon 11/16
12:29 pm-1:10 pm
1 stop16h 41m
Barcelona-El Prat
Thu 11/19
3:05 pm-11:06 pm
1 stop16h 01m
$799
Quickest round-trip
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Mon 8/10
2:00 pm-2:20 pm
1 stop16h 20m
Barcelona-El Prat
Fri 8/21
3:15 pm-10:53 pm
1 stop15h 38m
$881
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Thu 8/6
5:46 pm-5:55 pm
2 stops16h 09m
Barcelona-El Prat
Fri 8/21
12:15 pm-5:58 pm
2 stops37h 43m
$919
Cheapest one-way
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Tue 9/29
3:21 pm-6:40 pm
2 stops19h 19m
$357
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Tue 10/13
6:01 pm-6:40 pm
2 stops16h 39m
$357
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Mon 10/12
2:55 pm-5:35 pm
2 stops18h 40m
$357
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Mon 10/12
6:44 am-10:10 am
1 stop19h 26m
$360
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Tue 9/29
8:22 am-11:10 am
1 stop18h 48m
$375
Quickest one-way
BoiseBarcelona
BOI - BCN
BOIBCN
Boise Air Term. Gowen Fld
Tue 10/13
10:38 am-11:10 am
1 stop16h 32m
$375
Sorted 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 $1,042). 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 June 9, 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.
Crew
8.5
Food
7.2
Entertainment
7.8
Boarding
8.1
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Food
7.2
Entertainment
7.8
Boarding
8.1
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Food
7.2
Entertainment
7.8
Boarding
8.1
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Food
7.2
Entertainment
7.8
Boarding
8.1
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Food
7.2
Entertainment
7.8
Boarding
8.1
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Food
7.2
Entertainment
7.8
Boarding
8.1
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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 June 9, 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 June 9, 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 June 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$483 | Average$940 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$498 | Average$857 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$599 | Average$1,044 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$751 | Average$1,033 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$856 | Average$869 | FlexibilityNo cancel fee | On-time67% |