$422+ Cheap flights from Boise (BOI) to Barcelona
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — BCN
Oct 18 — Oct 251
Round-trip
1 adult, Economy
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Find cheap flights from Boise to Barcelona with Cheapflights
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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
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Cheapest
Best
Last-minute
One-way
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 September 18, 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 September 18, 2026.
This Air Canada deal was found by Cheapflights users on 9/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/712:31 pm -
2 stops37h 04m
Wed 11/181:35 pm -
2 stops29h 56m
Deal found 9/17![Multiple Airlines logo]()
$578
This Flysmarter deal was found by Cheapflights users on 9/15. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:50 pm -
2 stops29h 10m
Wed 10/144:05 pm -
1 stop15h 54m
Deal found 9/15![Air Canada logo]()
$581
This KLM deal was found by Cheapflights users on 9/15. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/282:11 pm -
1 stop14h 39m
Wed 10/141:20 pm -
1 stop16h 48m
Deal found 9/15![KLM logo]()
$587
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/116:25 am -
2 stops42h 55m
Wed 10/211:15 pm -
2 stops42h 44m
Deal found 9/14![United Airlines logo]()
$588
This United Airlines deal was found by Cheapflights users on 9/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/77:10 pm -
2 stops34h 05m
Wed 11/183:10 pm -
1 stop15h 41m
Deal found 9/17![United Airlines logo]()
$600
This Delta deal was found by Cheapflights users on 9/14. 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 10/1111:10 pm -
1 stop29h 40m
Wed 10/211:20 pm -
1 stop16h 48m
Deal found 9/14![Delta logo]()
$601
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Wed 11/1112:31 pm -
1 stop16h 44m
Thu 11/263:10 pm -
1 stop28h 21m
Deal found 9/16![United Airlines logo]()
$602
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 September 18, 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 September 18, 2026.
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sun 10/115:00 am -
2 stops44h 20m
Wed 10/211:15 pm -
2 stops42h 44m
Deal found 9/15![United Airlines logo]()
$588
This Delta deal was found by Cheapflights users on 9/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1111:10 pm -
1 stop29h 40m
Wed 10/211:20 pm -
1 stop16h 48m
Deal found 9/18![Delta logo]()
$600
This Travelocity deal was found by Cheapflights users on 9/18. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:44 am -
2 stops29h 11m
Mon 11/309:10 pm -
2 stops34h 39m
Deal found 9/18![Iberia logo]()
$688
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Wed 11/1112:31 pm -
1 stop16h 44m
Thu 11/263:10 pm -
1 stop28h 21m
Deal found 9/16![United Airlines logo]()
$602
This United Airlines deal was found by Cheapflights users on 9/14. 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 11/2312:31 pm -
1 stop16h 44m
Mon 12/76:50 am -
2 stops22h 40m
Deal found 9/14![United Airlines logo]()
$655
This United Airlines deal was found by Cheapflights users on 9/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2312:31 pm -
1 stop16h 44m
Mon 11/301:50 pm -
2 stops52h 09m
Deal found 9/18![United Airlines logo]()
$718
Last-minute flights from Boise to BarcelonaDiscover last-minute flight deals from Boise to Barcelona. Data last updated September 18, 2026 and is based on user searches.
Discover last-minute flight deals from Boise to Barcelona. Data last updated September 18, 2026 and is based on user searches.
This Flysmarter deal was found by Cheapflights users on 9/15. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:50 pm -
2 stops29h 10m
Wed 10/144:05 pm -
1 stop15h 54m
Deal found 9/15![Air Canada logo]()
$581
This KLM deal was found by Cheapflights users on 9/15. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/282:11 pm -
1 stop14h 39m
Wed 10/141:20 pm -
1 stop16h 48m
Deal found 9/15![KLM logo]()
$587
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/285:30 am -
2 stops19h 05m
Wed 10/149:20 am -
2 stops22h 39m
Deal found 9/15![Delta logo]()
$614
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:45 am -
1 stop20h 25m
Tue 10/1312:20 pm -
2 stops31h 07m
Deal found 9/15![Delta logo]()
$627
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/116:25 am -
2 stops42h 55m
Wed 10/211:15 pm -
2 stops42h 44m
Deal found 9/14![United Airlines logo]()
$588
This Delta deal was found by Cheapflights users on 9/16. 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.
Sun 10/1111:10 pm -
1 stop29h 40m
Wed 10/211:20 pm -
1 stop16h 48m
Deal found 9/16![Delta logo]()
$600
This CheapOair deal was found by Cheapflights users on 9/14. 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 10/116:25 am -
2 stops42h 55m
Wed 10/211:15 pm -
2 stops28h 19m
Deal found 9/14![Air Canada logo]()
$612
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 September 18, 2026.
Search for one-way flight options from Boise to Barcelona. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/92:50 pm -
2 stops25h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$422
This American Airlines deal was found by Cheapflights users on 9/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/133:24 pm -
2 stops19h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![American Airlines logo]()
$461
This Delta deal was found by Cheapflights users on 9/16. 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.
Tue 10/137:03 am -
2 stops21h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Delta logo]()
$463
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1211:32 am -
2 stops20h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Delta logo]()
$468
This FlightHub deal was found by Cheapflights users on 9/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:57 am -
2 stops29h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Multiple Airlines logo]()
$472
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:00 am -
3 stops53h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Multiple Airlines logo]()
$499
This Air France deal was found by Cheapflights users on 9/17. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/125:30 am -
2 stops19h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Air France logo]()
$509
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/911:10 pm -
1 stop29h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Delta logo]()
$570
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 September 18, 2026.
Round-trip from | $578 (Air Canada) |
|---|---|
One-way from | $422 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $839 |
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 7,457,451 searches. Data last updated September 18, 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 Boise Air Term. Gowen Fld - BCN Barcelona-El Prat
BOIBCN
Boise Air Term. Gowen Fld
Sun 11/1
12:31 pm-1:15 pm
1 stop16h 44m
Barcelona-El Prat
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$461
BoiseBarcelona
BOI Boise Air Term. Gowen Fld - BCN Barcelona-El Prat
BOIBCN
Boise Air Term. Gowen Fld
Tue 10/13
6:45 am-11:10 am
1 stop20h 25m
Barcelona-El Prat
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$463
Quickest round-trip
BoiseBarcelona
BOI Boise Air Term. Gowen Fld - BCN Barcelona-El Prat
BOIBCN
Boise Air Term. Gowen Fld
Mon 10/12
12:14 pm-10:10 am
1 stop13h 56m
Barcelona-El Prat
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$463
BoiseBarcelona
BOI Boise Air Term. Gowen Fld - BCN Barcelona-El Prat
BOIBCN
Boise Air Term. Gowen Fld
Mon 10/12
11:32 am-3:35 pm
2 stops20h 03m
Barcelona-El Prat
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$468
BoiseBarcelona
BOI Boise Air Term. Gowen Fld - BCN Barcelona-El Prat
BOIBCN
Boise Air Term. Gowen Fld
Tue 10/13
5:00 am-9:20 am
3 stops20h 20m
Barcelona-El Prat
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$472
BoiseBarcelona
BOI Boise Air Term. Gowen Fld - BCN Barcelona-El Prat
BOIBCN
Boise Air Term. Gowen Fld
Tue 10/13
8:57 am-10:10 pm
2 stops29h 13m
Barcelona-El Prat
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$472
BoiseBarcelona
BOI Boise Air Term. Gowen Fld - BCN Barcelona-El Prat
BOIBCN
Boise Air Term. Gowen Fld
Sun 10/11
5:00 am-9:20 am
2 stops44h 20m
Barcelona-El Prat
Wed 10/21
1:15 pm-11:59 pm
2 stops42h 44m
$588
BoiseBarcelona
BOI Boise Air Term. Gowen Fld - BCN Barcelona-El Prat
BOIBCN
Boise Air Term. Gowen Fld
Sun 10/11
11:10 pm-12:50 pm
1 stop29h 40m
Barcelona-El Prat
Wed 10/21
1:20 pm-10:08 pm
1 stop16h 48m
$600
BoiseBarcelona
BOI Boise Air Term. Gowen Fld - BCN Barcelona-El Prat
BOIBCN
Boise Air Term. Gowen Fld
Wed 11/11
12:31 pm-1:15 pm
1 stop16h 44m
Barcelona-El Prat
Thu 11/26
3:10 pm-11:31 am
1 stop28h 21m
$602
BoiseBarcelona
BOI Boise Air Term. Gowen Fld - BCN Barcelona-El Prat
BOIBCN
Boise Air Term. Gowen Fld
Mon 11/23
12:31 pm-1:15 pm
1 stop16h 44m
Barcelona-El Prat
Mon 12/7
6:50 am-9:30 pm
2 stops22h 40m
$655
Showing 1-10 of 12 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 $504). Flying from Boise to Barcelona in June is currently the most expensive (average of $3,383). 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 September 18, 2026.
Read through reviews of airlines operating flights from Boise to Barcelona, such as Delta,United Airlines, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.8
Crew
8.5
Comfort
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.8
Crew
8.5
Comfort
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.8
Crew
8.5
Comfort
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.8
Crew
8.5
Comfort
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.8
Crew
8.5
Comfort
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
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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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 September 18, 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 September 18, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated September 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$483 | Average$1,142 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$498 | Average$782 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$599 | Average$998 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$856 | Average$865 | FlexibilityNo cancel fee | On-time67% |