$383+ Cheap flights from Idaho to Spain
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 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — MAD
Aug 31 — Sep 71
Round-trip
1 adult, Economy
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Find cheap flights from Idaho to Spain with Cheapflights
1. Tell us where you want to go
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Cheapest flights from Idaho to SpainExplore the most affordable flight options available from Idaho to Spain. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 1, 2026.
Explore the most affordable flight options available from Idaho to Spain. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 1, 2026.
This United Airlines deal was found by Cheapflights users on 7/30. 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 11/25:00 am
BOI
- MAD
2 stops19h 00m
United Airlines
Tue 11/101:25 pm
MAD
- BOI
2 stops30h 05m
United Airlines
Deal found 7/30![United Airlines logo]()
$733
This FlightHub deal was found by Cheapflights users on 8/1. 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.
Mon 11/25:00 am
BOI
- MAD
2 stops19h 00m
Air Canada
Tue 11/101:25 pm
MAD
- BOI
2 stops41h 26m
Air Canada
Deal found 8/1![Air Canada logo]()
$734
This United Airlines deal was found by Cheapflights users on 7/31. 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 9/225:00 am
GEG
- MAD
2 stops16h 50m
United Airlines
Tue 9/291:30 pm
MAD
- GEG
2 stops40h 19m
United Airlines
Deal found 7/31![United Airlines logo]()
$738
This Expedia deal was found by Cheapflights users on 7/31. 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.
Tue 11/37:00 am
BOI
- BIO
2 stops21h 50m
Iberia
Tue 11/101:35 pm
BIO
- BOI
2 stops41h 07m
Iberia
Deal found 7/31![Iberia logo]()
$738
This Delta deal was found by Cheapflights users on 7/29. 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 11/1811:30 am
BOI
- BIO
2 stops21h 55m
Delta
Fri 11/276:50 am
BIO
- BOI
2 stops23h 36m
Delta
Deal found 7/29![Delta logo]()
$740
This Air Canada deal was found by Cheapflights users on 8/1. 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 11/22:51 pm
BOI
- MAD
3 stops33h 09m
Multiple Airlines
Tue 11/101:25 pm
MAD
- BOI
2 stops30h 05m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$741
This Delta deal was found by Cheapflights users on 7/28. 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 9/2111:10 pm
BOI
- MAD
1 stop29h 05m
Delta
Tue 10/66:00 am
MAD
- BOI
2 stops25h 59m
Delta
Deal found 7/28![Delta logo]()
$743
This Air France deal was found by Cheapflights users on 7/29. 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.
Sun 12/63:00 pm
BOI
- VLC
2 stops20h 30m
Multiple Airlines
Thu 12/106:00 am
VLC
- BOI
2 stops20h 37m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$744
This Expedia deal was found by Cheapflights users on 7/27. 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 9/307:02 am
BOI
- MAD
1 stop18h 03m
Iberia
Mon 10/59:00 pm
MAD
- BOI
2 stops33h 29m
Iberia
Deal found 7/27![Iberia logo]()
$744
This American Airlines deal was found by Cheapflights users on 7/30. 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 11/21:27 pm
BOI
- MAD
2 stops16h 08m
American Airlines
Mon 11/912:55 am
MAD
- BOI
1 stop20h 50m
American Airlines
Deal found 7/30![American Airlines logo]()
$746
This United Airlines deal was found by Cheapflights users on 7/29. 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 12/612:29 pm
BOI
- VLC
2 stops20h 56m
United Airlines
Thu 12/106:05 am
VLC
- BOI
2 stops25h 54m
United Airlines
Deal found 7/29![United Airlines logo]()
$753
This United Airlines deal was found by Cheapflights users on 7/30. 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 11/185:00 am
BOI
- MAD
2 stops19h 00m
United Airlines
Fri 11/276:05 am
MAD
- BOI
2 stops24h 54m
United Airlines
Deal found 7/30![United Airlines logo]()
$753
Best flights from Idaho to SpainDiscover carefully curated flight deals from Idaho to Spain that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 1, 2026.
Discover carefully curated flight deals from Idaho to Spain that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 1, 2026.
This United Airlines deal was found by Cheapflights users on 7/30. 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 11/25:00 am
BOI
- MAD
2 stops19h 00m
United Airlines
Tue 11/101:25 pm
MAD
- BOI
2 stops30h 05m
United Airlines
Deal found 7/30![United Airlines logo]()
$733
This American Airlines deal was found by Cheapflights users on 7/29. 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 1/131:58 pm
BOI
- MAD
2 stops20h 32m
American Airlines
Wed 1/201:00 pm
MAD
- BOI
1 stop32h 08m
American Airlines
Deal found 7/29![American Airlines logo]()
$737
This Delta deal was found by Cheapflights users on 7/30. 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 11/188:15 am
BOI
- BIO
2 stops25h 10m
Delta
Thu 11/266:50 am
BIO
- BOI
2 stops18h 25m
Delta
Deal found 7/30![Delta logo]()
$740
This Expedia deal was found by Cheapflights users on 7/31. 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.
Tue 9/2212:45 pm
GEG
- MAD
1 stop16h 40m
Iberia
Tue 9/297:30 am
MAD
- GEG
2 stops21h 55m
Iberia
Deal found 7/31![Iberia logo]()
$754
This Iberia deal was found by Cheapflights users on 7/29. 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 11/22:41 pm
BOI
- MAD
1 stop31h 29m
Multiple Airlines
Mon 11/912:55 am
MAD
- BOI
1 stop20h 50m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$756
This KLM deal was found by Cheapflights users on 7/30. 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 9/2211:10 am
GEG
- MAD
2 stops17h 30m
KLM
Tue 9/297:00 am
MAD
- GEG
2 stops18h 21m
KLM
Deal found 7/30![KLM logo]()
$759
This British Airways deal was found by Cheapflights users on 7/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/68:18 am
BOI
- AGP
2 stops25h 32m
British Airways
Wed 12/99:10 am
AGP
- BOI
2 stops21h 45m
British Airways
Deal found 7/29![British Airways logo]()
$978
This Scandinavian Airlines deal was found by Cheapflights users on 7/28. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/64:14 pm
BOI
- AGP
2 stops41h 26m
Scandinavian Airlines
Wed 12/96:30 pm
AGP
- BOI
2 stops36h 24m
Scandinavian Airlines
Deal found 7/28![Scandinavian Airlines logo]()
$1,078
This Delta deal was found by Cheapflights users on 7/31. 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 11/1811:30 am
BOI
- BIO
2 stops21h 55m
Delta
Fri 11/276:50 am
BIO
- BOI
2 stops23h 36m
Delta
Deal found 7/31![Delta logo]()
$740
This American Airlines deal was found by Cheapflights users on 7/28. 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 11/21:27 pm
BOI
- MAD
2 stops16h 08m
American Airlines
Mon 11/912:55 am
MAD
- BOI
1 stop20h 50m
American Airlines
Deal found 7/28![American Airlines logo]()
$751
This United Airlines deal was found by Cheapflights users on 7/29. 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 12/612:29 pm
BOI
- VLC
2 stops20h 56m
United Airlines
Thu 12/106:05 am
VLC
- BOI
2 stops25h 54m
United Airlines
Deal found 7/29![United Airlines logo]()
$753
This Iberia deal was found by Cheapflights users on 7/31. 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.
Tue 9/2212:45 pm
GEG
- MAD
1 stop16h 40m
Multiple Airlines
Tue 9/293:55 pm
MAD
- GEG
1 stop29h 00m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$756
This Air Canada deal was found by Cheapflights users on 7/28. 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.
Fri 9/1111:11 am
GEG
- MAD
3 stops19h 09m
Air Canada
Fri 9/181:30 pm
MAD
- GEG
3 stops32h 05m
Air Canada
Deal found 7/28![Air Canada logo]()
$1,548
This KLM deal was found by Cheapflights users on 7/30. 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 9/293:28 pm
BOI
- BIO
2 stops17h 02m
KLM
Tue 10/137:10 am
BIO
- BOI
2 stops19h 23m
KLM
Deal found 7/30![KLM logo]()
$812
This United Airlines deal was found by Cheapflights users on 7/29. 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 12/55:22 pm
BOI
- BIO
2 stops45h 28m
United Airlines
Wed 12/97:30 am
BIO
- BOI
2 stops19h 46m
United Airlines
Deal found 7/29![United Airlines logo]()
$760
This American Airlines deal was found by Cheapflights users on 7/30. 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 12/71:58 pm
IDA
- BCN
2 stops19h 57m
American Airlines
Thu 12/106:45 pm
BCN
- IDA
2 stops26h 42m
American Airlines
Deal found 7/30![American Airlines logo]()
$769
This Expedia deal was found by Cheapflights users on 7/31. 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.
Mon 9/147:02 am
BOI
- VLC
2 stops33h 18m
Iberia
Mon 9/212:25 pm
VLC
- BOI
2 stops40h 02m
Iberia
Deal found 7/31![Iberia logo]()
$860
This Delta deal was found by Cheapflights users on 7/28. 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 9/212:05 pm
GEG
- BCN
2 stops33h 30m
Delta
Wed 10/71:20 pm
BCN
- GEG
1 stop14h 25m
Delta
Deal found 7/28![Delta logo]()
$801
This Finnair deal was found by Cheapflights users on 7/27. 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.
Sat 9/195:00 am
GEG
- BCN
2 stops23h 35m
Multiple Airlines
Fri 10/23:50 pm
BCN
- GEG
2 stops29h 05m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$847
This United Airlines deal was found by Cheapflights users on 7/31. 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 12/512:30 pm
JAC
- BCN
3 stops36h 30m
United Airlines
Wed 12/910:30 am
BCN
- JAC
2 stops31h 33m
United Airlines
Deal found 7/31![United Airlines logo]()
$773
This KLM deal was found by Cheapflights users on 8/1. 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.
Fri 10/95:09 pm
GEG
- AGP
2 stops20h 41m
KLM
Fri 10/1610:45 am
AGP
- GEG
2 stops22h 05m
KLM
Deal found 8/1![KLM logo]()
$856
This American Airlines deal was found by Cheapflights users on 7/27. 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.
Sat 9/192:11 pm
GEG
- BCN
1 stop35h 44m
American Airlines
Fri 10/210:30 am
BCN
- GEG
1 stop35h 49m
American Airlines
Deal found 7/27![American Airlines logo]()
$797
This Delta deal was found by Cheapflights users on 7/30. 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 10/133:30 pm
GEG
- BCN
2 stops16h 40m
Delta
Fri 10/231:20 pm
BCN
- GEG
1 stop14h 25m
Delta
Deal found 7/30![Delta logo]()
$806
This United Airlines deal was found by Cheapflights users on 7/31. 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 11/75:44 pm
BOI
- BCN
2 stops31h 16m
United Airlines
Wed 11/183:10 pm
BCN
- BOI
1 stop15h 41m
United Airlines
Deal found 7/31![United Airlines logo]()
$773
This Finnair deal was found by Cheapflights users on 8/1. 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 10/67:00 am
BOI
- BCN
2 stops22h 35m
Multiple Airlines
Sun 10/187:00 pm
BCN
- BOI
2 stops27h 33m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$857
This Expedia deal was found by Cheapflights users on 7/28. 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.
Fri 9/1112:39 pm
GEG
- MAD
1 stop16h 46m
Iberia
Fri 9/1812:40 pm
MAD
- GEG
1 stop16h 41m
Iberia
Deal found 7/28![Iberia logo]()
$973
This Delta deal was found by Cheapflights users on 7/31. 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
BOI
- BCN
1 stop29h 40m
Delta
Wed 10/211:20 pm
BCN
- BOI
1 stop16h 48m
Delta
Deal found 7/31![Delta logo]()
$808
This United Airlines deal was found by Cheapflights users on 7/28. 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 11/1612:37 pm
BOI
- BCN
1 stop16h 38m
United Airlines
Fri 11/276:50 am
BCN
- BOI
2 stops24h 43m
United Airlines
Deal found 7/28![United Airlines logo]()
$776
This KLM deal was found by Cheapflights users on 7/31. 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.
Fri 10/2311:18 am
GEG
- AGP
2 stops19h 37m
KLM
Sat 10/318:25 pm
AGP
- GEG
2 stops29h 33m
KLM
Deal found 7/31![KLM logo]()
$945
This Delta deal was found by Cheapflights users on 7/27. 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 9/3012:17 pm
BOI
- MAD
2 stops20h 08m
Delta
Mon 10/56:00 am
MAD
- BOI
2 stops24h 34m
Delta
Deal found 7/27![Delta logo]()
$814
Last-minute flights from Idaho to SpainDiscover last-minute flight deals from Idaho to Spain. Data last updated August 1, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Spain. Data last updated August 1, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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.
Mon 8/310:20 am
BOI
- BIO
2 stops28h 05m
Lufthansa
Tue 10/66:50 am
BIO
- BOI
2 stops22h 45m
Lufthansa
Deal found 7/30![Lufthansa logo]()
$898
This Cheapflightsfares deal was found by Cheapflights users on 7/31. 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.
Wed 8/510:20 am
BOI
- BIO
2 stops23h 35m
Lufthansa
Wed 8/196:50 am
BIO
- BOI
2 stops22h 47m
Lufthansa
Deal found 7/31![Lufthansa logo]()
$922
This Air France deal was found by Cheapflights users on 8/1. 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.
Wed 8/55:00 pm
BOI
- BIO
2 stops21h 00m
Multiple Airlines
Wed 8/1912:00 pm
BIO
- BOI
2 stops18h 30m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$937
This CheapOair deal was found by Cheapflights users on 7/29. 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 8/910:52 am
BOI
- BCN
2 stops27h 18m
Multiple Airlines
Thu 8/208:00 am
BCN
- BOI
2 stops23h 55m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$951
This FlightHub deal was found by Cheapflights users on 7/30. 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.
Mon 8/1010:52 am
BOI
- BCN
2 stops27h 18m
Multiple Airlines
Fri 8/218:00 am
BCN
- BOI
2 stops22h 33m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$938
This FlightHub deal was found by Cheapflights users on 7/31. 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.
Sat 8/221:32 pm
BOI
- BCN
2 stops24h 38m
Multiple Airlines
Sun 8/3010:25 am
BCN
- BOI
2 stops20h 08m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$978
This FlightHub deal was found by Cheapflights users on 7/28. 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 8/2510:14 am
BOI
- BCN
2 stops27h 56m
Multiple Airlines
Wed 10/1410:25 am
BCN
- BOI
2 stops21h 34m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$812
This United Airlines deal was found by Cheapflights users on 7/28. 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 8/258:23 am
BOI
- BCN
1 stop20h 52m
United Airlines
Wed 10/1412:15 pm
BCN
- BOI
2 stops41h 20m
United Airlines
Deal found 7/28![United Airlines logo]()
$866
This Delta deal was found by Cheapflights users on 7/28. 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 8/2512:23 pm
BOI
- BCN
1 stop14h 47m
Delta
Wed 10/141:20 pm
BCN
- BOI
1 stop16h 48m
Delta
Deal found 7/28![Delta logo]()
$886
This United Airlines deal was found by Cheapflights users on 7/29. 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 8/274:25 pm
JAC
- BCN
2 stops31h 55m
United Airlines
Thu 9/31:15 pm
BCN
- JAC
2 stops39h 25m
United Airlines
Deal found 7/29![United Airlines logo]()
$1,026
This American Airlines deal was found by Cheapflights users on 7/29. 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.
Thu 8/2711:48 am
JAC
- BCN
1 stop14h 22m
American Airlines
Thu 9/37:00 pm
BCN
- JAC
1 stop25h 58m
American Airlines
Deal found 7/29![American Airlines logo]()
$1,037
This Delta deal was found by Cheapflights users on 8/1. 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 8/3011:09 am
GEG
- BCN
2 stops21h 01m
Delta
Sun 9/61:20 pm
BCN
- GEG
1 stop15h 12m
Delta
Deal found 8/1![Delta logo]()
$943
One-way flights from Idaho to SpainSearch for one-way flight options from Idaho to Spain. Find affordable one-way fares based on user searches. Data last updated August 1, 2026.
Search for one-way flight options from Idaho to Spain. Find affordable one-way fares based on user searches. Data last updated August 1, 2026.
This United Airlines deal was found by Cheapflights users on 7/31. 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 11/215:44 pm
BOI
- BCN
2 stops54h 36m
United Airlines
Deal found 7/31![United Airlines logo]()
$383
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/181:24 pm
BOI
- MAD
3 stops46h 01m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$391
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 10/121:30 pm
BOI
- MAD
3 stops49h 10m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$409
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/296:00 am
BOI
- MAD
3 stops47h 05m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$453
This American Airlines deal was found by Cheapflights users on 8/1. 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 10/123:24 pm
BOI
- BCN
2 stops18h 11m
American Airlines
Deal found 8/1![American Airlines logo]()
$460
This American Airlines deal was found by Cheapflights users on 7/30. 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 10/142:15 pm
GEG
- BCN
2 stops16h 40m
American Airlines
Deal found 7/30![American Airlines logo]()
$460
This American Airlines deal was found by Cheapflights users on 7/28. 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 8/316:44 am
BOI
- MAD
2 stops18h 51m
American Airlines
Deal found 7/28![American Airlines logo]()
$463
This United Airlines deal was found by Cheapflights users on 7/29. 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 8/265:00 am
GEG
- BCN
2 stops19h 00m
United Airlines
Deal found 7/29![United Airlines logo]()
$463
This Mytrip deal was found by Cheapflights users on 8/1. 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 8/2912:24 pm
BOI
- MAD
2 stops34h 26m
Air Canada
Deal found 8/1![Air Canada logo]()
$468
This United Airlines deal was found by Cheapflights users on 7/30. 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 8/3111:52 am
BOI
- MAD
2 stops36h 13m
United Airlines
Deal found 7/30![United Airlines logo]()
$469
This United Airlines deal was found by Cheapflights users on 7/30. 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 9/53:54 pm
GEG
- BCN
2 stops31h 26m
United Airlines
Deal found 7/30![United Airlines logo]()
$469
This United Airlines deal was found by Cheapflights users on 7/29. 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 9/53:54 pm
GEG
- MAD
2 stops31h 11m
United Airlines
Deal found 7/29![United Airlines logo]()
$469
Find flight deals from Idaho to Spain
Keep the following information in mind while searching for Idaho to Spain flight deals. Data was last updated August 1, 2026.
Round-trip from | $733 (United Airlines) |
|---|---|
One-way from | $383 (United Airlines) |
Popular in | June |
Cheapest in | February |
Average price | $881 |
Cheapflights Fare Finder
Customize your flight search to find flights from Idaho to Spain 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 August 1, 2026.
Use the filters below to find and compare flights from Idaho to Spain that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BoiseMadrid
BOI - MAD
BOIMAD
Boise Air Term. Gowen Fld
Mon 11/2
5:00 am-8:00 am
2 stops19h 00m
Madrid Barajas
Tue 11/10
1:25 pm-11:30 am
2 stops30h 05m
$733
BoiseMadrid
BOI - MAD
BOIMAD
Boise Air Term. Gowen Fld
Wed 1/13
1:58 pm-6:30 pm
2 stops20h 32m
Madrid Barajas
Wed 1/20
1:00 pm-1:08 pm
1 stop32h 08m
$737
BoiseBilbao
BOI - BIO
BOIBIO
Boise Air Term. Gowen Fld
Wed 11/18
8:15 am-5:25 pm
2 stops25h 10m
Bilbao
Thu 11/26
6:50 am-5:15 pm
2 stops18h 25m
$740
BoiseBilbao
BOI - BIO
BOIBIO
Boise Air Term. Gowen Fld
Wed 11/18
11:30 am-5:25 pm
2 stops21h 55m
Bilbao
Fri 11/27
6:50 am-10:26 pm
2 stops23h 36m
$740
BoiseMadrid
BOI - MAD
BOIMAD
Boise Air Term. Gowen Fld
Mon 11/2
1:27 pm-1:35 pm
2 stops16h 08m
Madrid Barajas
Mon 11/9
12:55 am-1:45 pm
1 stop20h 50m
$751
BoiseValencia
BOI - VLC
BOIVLC
Boise Air Term. Gowen Fld
Sun 12/6
12:29 pm-5:25 pm
2 stops20h 56m
Valencia
Thu 12/10
6:05 am-11:59 pm
2 stops25h 54m
$753
SpokaneMadrid
GEG - MAD
GEGMAD
Spokane
Tue 9/22
12:45 pm-2:25 pm
1 stop16h 40m
Madrid Barajas
Tue 9/29
7:30 am-8:25 pm
2 stops21h 55m
$754
BoiseMadrid
BOI - MAD
BOIMAD
Boise Air Term. Gowen Fld
Mon 11/2
2:41 pm-6:10 am
1 stop31h 29m
Madrid Barajas
Mon 11/9
12:55 am-1:45 pm
1 stop20h 50m
$756
SpokaneMadrid
GEG - MAD
GEGMAD
Spokane
Tue 9/22
12:45 pm-2:25 pm
1 stop16h 40m
Madrid Barajas
Tue 9/29
3:55 pm-11:55 am
1 stop29h 00m
$756
SpokaneMadrid
GEG - MAD
GEGMAD
Spokane
Tue 9/22
11:10 am-1:40 pm
2 stops17h 30m
Madrid Barajas
Tue 9/29
7:00 am-4:21 pm
2 stops18h 21m
$759
Showing 1-10 of 55 resultsSorted by cheapest first
Best time to book a flight from Idaho to Spain
Have a flexible travel schedule? Discover the best time to fly to Spain from Idaho with our price prediction graph.
BOI-MAD
BOI-BIO
GEG-MAD
BOI-AGP
BOI-VLC
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 Idaho to Spain
USID-ES0
BOI-MAD
BOI-BIO
GEG-MAD
BOI-AGP
What is the cheapest month to book a flight from Idaho to Spain?
Currently, February is the cheapest month in which you can book a flight from Idaho to Spain (average of $504). Flying from Idaho to Spain in June is currently the most expensive (average of $1,433). 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.
Related info for your journey
Find useful and relevant information for your journey from Idaho to Spain. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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
Complete your trip
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Top destinations
Top regions
Alternative routes for Idaho to Spain
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Spain by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Idaho to Spain by cabin class
Find flights from Idaho to Spain, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Idaho and Spain flights
Browse other Idaho and Spain flight options. Last updated on August 1, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Spain
Find the right flight back to Idaho after your stay in Spain
Idaho to Spain flights
Consider these flights traveling from Idaho to Spain.
Fly to Spain regions
Consider these flights traveling to Spain regions.
Top 5 airlines flying from Idaho to Spain
Discover the top 5 airlines that operate flights from Idaho to Spain. 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 August 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$483 | Average$939 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$493 | Average$894 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$541 | Average$969 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$599 | Average$946 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$856 | Average$869 | FlexibilityNo cancel fee | On-time67% |