$387+ Cheap flights from Idaho to Portugal
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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
May 12 — May 191
Round-trip
1 adult, Economy
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Find cheap flights from Idaho to Portugal with Cheapflights
1. Tell us where you want to go
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 flights from Idaho to PortugalExplore the most affordable flight options available from Idaho to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 12, 2026.
Explore the most affordable flight options available from Idaho to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 12, 2026.
This American Airlines deal was found by Cheapflights users on 4/9. 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.
Wed 11/41:14 pm
GEG
- LIS
2 stops20h 26m
American Airlines
Wed 11/116:30 am
LIS
- GEG
2 stops22h 25m
American Airlines
Deal found 4/9![American Airlines logo]()
$716
This United Airlines deal was found by Cheapflights users on 4/12. 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 11/45:00 am
GEG
- LIS
2 stops21h 15m
United Airlines
Wed 11/111:00 pm
LIS
- GEG
2 stops40h 09m
United Airlines
Deal found 4/12![United Airlines logo]()
$717
This American Airlines deal was found by Cheapflights users on 4/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/222:14 pm
BOI
- LIS
2 stops18h 26m
American Airlines
Wed 5/66:35 am
LIS
- BOI
2 stops23h 19m
American Airlines
Deal found 4/7![American Airlines logo]()
$781
This United Airlines deal was found by Cheapflights users on 4/8. 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.
Sat 11/72:40 pm
JAC
- LIS
2 stops37h 20m
United Airlines
Tue 11/101:00 pm
LIS
- JAC
2 stops31h 29m
United Airlines
Deal found 4/8![United Airlines logo]()
$786
This Delta deal was found by Cheapflights users on 4/11. 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 4/145:40 am
BOI
- LIS
2 stops19h 20m
Delta
Tue 4/285:00 am
LIS
- BOI
2 stops24h 24m
Delta
Deal found 4/11![Delta logo]()
$786
This Air France deal was found by Cheapflights users on 4/10. 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.
Tue 4/146:00 am
GEG
- LIS
2 stops20h 45m
Multiple Airlines
Tue 4/285:00 am
LIS
- GEG
2 stops17h 49m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$786
This American Airlines deal was found by Cheapflights users on 4/8. 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.
Wed 4/228:11 am
BOI
- LIS
2 stops17h 54m
Multiple Airlines
Wed 5/66:35 am
LIS
- BOI
2 stops23h 19m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$791
This United Airlines deal was found by Cheapflights users on 4/7. 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.
Sun 11/86:55 pm
BOI
- LIS
2 stops32h 20m
United Airlines
Thu 11/1211:55 am
LIS
- BOI
2 stops31h 07m
United Airlines
Deal found 4/7![United Airlines logo]()
$803
This American Airlines deal was found by Cheapflights users on 4/9. 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.
Tue 4/147:20 am
BOI
- LIS
2 stops18h 45m
Multiple Airlines
Tue 4/287:10 am
LIS
- BOI
2 stops22h 28m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$814
This Expedia deal was found by Cheapflights users on 4/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:25 am
GEG
- LIS
2 stops28h 40m
Iberia
Mon 11/304:45 pm
LIS
- GEG
2 stops36h 10m
Iberia
Deal found 4/9![Iberia logo]()
$818
This American Airlines deal was found by Cheapflights users on 4/8. 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.
Mon 5/42:14 pm
BOI
- LIS
2 stops18h 31m
American Airlines
Tue 5/126:35 am
LIS
- BOI
2 stops23h 03m
American Airlines
Deal found 4/8![American Airlines logo]()
$828
This Delta deal was found by Cheapflights users on 4/11. 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 4/225:40 am
BOI
- LIS
2 stops19h 20m
Delta
Wed 5/135:00 am
LIS
- BOI
2 stops24h 28m
Delta
Deal found 4/11![Delta logo]()
$833
Best flights from Idaho to PortugalDiscover carefully curated flight deals from Idaho to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 12, 2026.
Discover carefully curated flight deals from Idaho to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 12, 2026.
This FlightHub deal was found by Cheapflights users on 4/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/83:23 pm
BOI
- LIS
2 stops22h 17m
Scandinavian Airlines
Sat 5/2310:55 pm
LIS
- BOI
2 stops28h 39m
Scandinavian Airlines
Deal found 4/9![Scandinavian Airlines logo]()
$837
This Delta deal was found by Cheapflights users on 4/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:10 pm
GEG
- LIS
2 stops17h 35m
Delta
Sat 5/95:00 am
LIS
- GEG
2 stops25h 29m
Delta
Deal found 4/9![Delta logo]()
$890
This KLM deal was found by Cheapflights users on 4/10. 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 4/245:10 pm
GEG
- LIS
2 stops17h 35m
Multiple Airlines
Sat 5/99:50 am
LIS
- GEG
2 stops21h 28m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$898
This United Airlines deal was found by Cheapflights users on 4/10. 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 8/107:05 pm
BOI
- LIS
2 stops32h 25m
United Airlines
Tue 8/1811:25 am
LIS
- BOI
3 stops60h 23m
United Airlines
Deal found 4/10![United Airlines logo]()
$955
This Booking.com deal was found by Cheapflights users on 4/11. 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.
Sat 8/151:38 pm
GEG
- LIS
2 stops35h 42m
Air Canada
Sat 8/2211:25 am
LIS
- GEG
2 stops35h 33m
Air Canada
Deal found 4/11![Air Canada logo]()
$982
This Finnair deal was found by Cheapflights users on 4/7. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/151:18 pm
BOI
- LIS
2 stops27h 07m
Finnair
Sat 9/266:35 am
LIS
- BOI
2 stops22h 42m
Finnair
Deal found 4/7![Finnair logo]()
$1,024
This KLM deal was found by Cheapflights users on 4/11. 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.
Sat 5/2311:05 am
GEG
- FAO
2 stops24h 05m
KLM
Sat 6/69:05 pm
FAO
- GEG
2 stops27h 05m
KLM
Deal found 4/11![KLM logo]()
$1,354
This Finnair deal was found by Cheapflights users on 4/10. 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.
Mon 8/102:55 pm
BOI
- LIS
2 stops25h 30m
Multiple Airlines
Tue 8/186:45 pm
LIS
- BOI
2 stops34h 32m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$923
This United Airlines deal was found by Cheapflights users on 4/10. 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 9/24:25 pm
JAC
- LIS
2 stops33h 55m
United Airlines
Thu 9/1011:25 am
LIS
- JAC
2 stops40h 40m
United Airlines
Deal found 4/10![United Airlines logo]()
$1,045
This Delta deal was found by Cheapflights users on 4/7. 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.
Thu 8/68:42 am
BOI
- LIS
2 stops23h 13m
Delta
Thu 8/135:00 am
LIS
- BOI
2 stops25h 04m
Delta
Deal found 4/7![Delta logo]()
$1,067
This Air France deal was found by Cheapflights users on 4/11. 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.
Tue 9/151:15 pm
BOI
- LIS
2 stops18h 40m
Multiple Airlines
Sat 9/265:00 am
LIS
- BOI
2 stops20h 35m
Multiple Airlines
Deal found 4/11![Multiple Airlines logo]()
$1,000
This United Airlines deal was found by Cheapflights users on 4/7. 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.
Thu 8/66:30 am
BOI
- LIS
2 stops21h 35m
United Airlines
Fri 8/1412:20 pm
LIS
- BOI
2 stops28h 15m
United Airlines
Deal found 4/7![United Airlines logo]()
$1,068
This Delta deal was found by Cheapflights users on 4/11. 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 5/181:11 pm
GEG
- LIS
2 stops20h 39m
Delta
Mon 5/255:00 am
LIS
- GEG
2 stops18h 31m
Delta
Deal found 4/11![Delta logo]()
$1,083
This Air France deal was found by Cheapflights users on 4/10. 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 6/112:55 pm
BOI
- LIS
2 stops19h 00m
Multiple Airlines
Wed 6/105:00 am
LIS
- BOI
2 stops19h 28m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$1,036
This United Airlines deal was found by Cheapflights users on 4/11. 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 9/168:40 am
JAC
- LIS
2 stops20h 05m
United Airlines
Fri 9/2511:25 am
LIS
- JAC
2 stops38h 27m
United Airlines
Deal found 4/11![United Airlines logo]()
$1,078
This Delta deal was found by Cheapflights users on 4/7. 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.
Mon 6/18:58 am
BOI
- LIS
2 stops19h 17m
Delta
Wed 6/105:00 am
LIS
- BOI
2 stops19h 28m
Delta
Deal found 4/7![Delta logo]()
$1,085
This United Airlines deal was found by Cheapflights users on 4/9. 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.
Tue 6/95:00 am
GEG
- LIS
2 stops46h 05m
United Airlines
Wed 7/811:25 am
LIS
- GEG
2 stops35h 46m
United Airlines
Deal found 4/9![United Airlines logo]()
$1,080
This Delta deal was found by Cheapflights users on 4/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2011:05 am
GEG
- LIS
2 stops23h 40m
Delta
Tue 5/265:00 am
LIS
- GEG
2 stops21h 43m
Delta
Deal found 4/9![Delta logo]()
$1,097
This Delta deal was found by Cheapflights users on 4/11. 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 6/226:20 am
GEG
- LIS
2 stops20h 55m
Delta
Tue 6/305:35 am
LIS
- GEG
2 stops25h 22m
Delta
Deal found 4/11![Delta logo]()
$1,147
This Delta deal was found by Cheapflights users on 4/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1012:00 pm
BOI
- LIS
2 stops22h 50m
Delta
Mon 6/155:00 am
LIS
- BOI
2 stops19h 28m
Delta
Deal found 4/8![Delta logo]()
$1,155
This Delta deal was found by Cheapflights users on 4/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1012:00 pm
BOI
- LIS
2 stops23h 45m
Delta
Sun 6/145:00 am
LIS
- BOI
2 stops21h 13m
Delta
Deal found 4/8![Delta logo]()
$1,160
This Delta deal was found by Cheapflights users on 4/10. 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.
Thu 6/48:58 am
BOI
- LIS
2 stops19h 17m
Delta
Sun 6/215:00 am
LIS
- BOI
2 stops21h 13m
Delta
Deal found 4/10![Delta logo]()
$1,176
This Mytrip deal was found by Cheapflights users on 4/11. 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 5/237:00 am
GEG
- FAO
3 stops32h 20m
Multiple Airlines
Sat 6/67:30 am
FAO
- GEG
3 stops24h 29m
Multiple Airlines
Deal found 4/11![Multiple Airlines logo]()
$2,068
This AranGrant deal was found by Cheapflights users on 4/8. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/97:00 am
JAC
- LIS
1 stop18h 20m
Multiple Airlines
Wed 6/1711:45 pm
LIS
- JAC
2 stops28h 15m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$6,603
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Thu 6/1112:59 pm
JAC
- LIS
1 stop20h 36m
Multiple Airlines
Wed 6/179:40 am
LIS
- JAC
1 stop33h 51m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$9,687
Last-minute flights from Idaho to PortugalDiscover last-minute flight deals from Idaho to Portugal. Data last updated April 12, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Portugal. Data last updated April 12, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 4/11. 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 4/145:40 am
BOI
- LIS
2 stops19h 20m
Delta
Tue 4/285:00 am
LIS
- BOI
2 stops24h 24m
Delta
Deal found 4/11![Delta logo]()
$786
This Air France deal was found by Cheapflights users on 4/10. 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.
Tue 4/146:00 am
GEG
- LIS
2 stops20h 45m
Multiple Airlines
Tue 4/285:00 am
LIS
- GEG
2 stops17h 49m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$786
This American Airlines deal was found by Cheapflights users on 4/9. 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.
Tue 4/147:20 am
BOI
- LIS
2 stops18h 45m
Multiple Airlines
Tue 4/287:10 am
LIS
- BOI
2 stops22h 28m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$814
This KLM deal was found by Cheapflights users on 4/8. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/143:23 pm
BOI
- LIS
2 stops20h 22m
KLM
Tue 4/289:20 am
LIS
- BOI
2 stops18h 09m
KLM
Deal found 4/8![KLM logo]()
$840
This American Airlines deal was found by Cheapflights users on 4/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/222:14 pm
BOI
- LIS
2 stops18h 26m
American Airlines
Wed 5/66:35 am
LIS
- BOI
2 stops23h 19m
American Airlines
Deal found 4/7![American Airlines logo]()
$781
This American Airlines deal was found by Cheapflights users on 4/8. 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.
Wed 4/228:11 am
BOI
- LIS
2 stops17h 54m
Multiple Airlines
Wed 5/66:35 am
LIS
- BOI
2 stops23h 19m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$791
This Delta deal was found by Cheapflights users on 4/11. 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 4/225:40 am
BOI
- LIS
2 stops19h 20m
Delta
Wed 5/135:00 am
LIS
- BOI
2 stops24h 28m
Delta
Deal found 4/11![Delta logo]()
$833
This American Airlines deal was found by Cheapflights users on 4/9. 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.
Wed 4/228:11 am
BOI
- LIS
2 stops17h 54m
Multiple Airlines
Wed 5/1311:05 am
LIS
- BOI
2 stops18h 53m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$847
This American Airlines deal was found by Cheapflights users on 4/8. 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.
Sun 5/38:11 am
BOI
- LIS
2 stops17h 54m
Multiple Airlines
Tue 5/126:35 am
LIS
- BOI
2 stops23h 03m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$838
This American Airlines deal was found by Cheapflights users on 4/8. 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.
Mon 5/42:14 pm
BOI
- LIS
2 stops18h 31m
American Airlines
Tue 5/126:35 am
LIS
- BOI
2 stops23h 03m
American Airlines
Deal found 4/8![American Airlines logo]()
$828
This Priceline deal was found by Cheapflights users on 4/8. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/51:29 pm
BOI
- LIS
2 stops26h 56m
Finnair
Wed 5/134:35 pm
LIS
- BOI
2 stops37h 19m
Finnair
Deal found 4/8![Finnair logo]()
$845
This FlightHub deal was found by Cheapflights users on 4/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/83:23 pm
BOI
- LIS
2 stops22h 17m
Scandinavian Airlines
Sat 5/2310:55 pm
LIS
- BOI
2 stops28h 39m
Scandinavian Airlines
Deal found 4/9![Scandinavian Airlines logo]()
$837
One-way flights from Idaho to PortugalSearch for one-way flight options from Idaho to Portugal. Find affordable one-way fares based on user searches. Data last updated April 12, 2026.
Search for one-way flight options from Idaho to Portugal. Find affordable one-way fares based on user searches. Data last updated April 12, 2026.
This American Airlines deal was found by Cheapflights users on 4/8. 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 9/2212:10 pm
BOI
- LIS
2 stops19h 20m
American Airlines
Deal found 4/8![American Airlines logo]()
$387
This Iberia deal was found by Cheapflights users on 4/8. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2112:10 pm
BOI
- LIS
2 stops20h 55m
Iberia
Deal found 4/8![Iberia logo]()
$398
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 9/227:48 pm
BOI
- LIS
3 stops28h 02m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$444
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Mon 9/217:48 pm
BOI
- LIS
3 stops29h 17m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$451
This Expedia deal was found by Cheapflights users on 4/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/292:37 pm
BOI
- LIS
2 stops49h 08m
Lufthansa
Deal found 4/7![Lufthansa logo]()
$484
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/297:20 pm
BOI
- LIS
3 stops54h 40m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$488
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Thu 5/76:00 am
BOI
- LIS
3 stops44h 00m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$499
This Air France deal was found by Cheapflights users on 4/8. 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.
Thu 5/72:23 pm
BOI
- LIS
2 stops20h 27m
Air France
Deal found 4/8![Air France logo]()
$558
This Booking.com deal was found by Cheapflights users on 4/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:01 pm
BOI
- LIS
2 stops57h 04m
Air Canada
Deal found 4/7![Air Canada logo]()
$560
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/237:20 pm
BOI
- LIS
3 stops55h 15m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$570
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/284:25 pm
BOI
- LIS
3 stops34h 10m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$587
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/271:04 pm
BOI
- LIS
3 stops48h 51m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$590
Find flight deals from Idaho to Portugal
Keep the following information in mind while searching for Idaho to Portugal flight deals. Data was last updated April 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $781 (American Airlines) |
One-way from | $387 (American Airlines) |
Popular in | December |
Cheapest in | February |
Average price | $663 |
Cheapflights Fare Finder
Customize your flight search to find flights from Idaho to Portugal 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 12, 2026.
Use the filters below to find and compare flights from Idaho to Portugal that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Fri 5/8
3:23 pm-8:40 pm
2 stops22h 17m
Lisbon Humberto Delgado
Sat 5/23
10:55 pm-8:34 pm
2 stops28h 39m
$837
SpokaneLisbon
GEG - LIS
GEGLIS
Spokane
Fri 4/24
5:10 pm-6:45 pm
2 stops17h 35m
Lisbon Humberto Delgado
Sat 5/9
5:00 am-10:29 pm
2 stops25h 29m
$890
SpokaneLisbon
GEG - LIS
GEGLIS
Spokane
Fri 4/24
5:10 pm-6:45 pm
2 stops17h 35m
Lisbon Humberto Delgado
Sat 5/9
9:50 am-11:18 pm
2 stops21h 28m
$898
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Mon 8/10
2:55 pm-11:25 pm
2 stops25h 30m
Lisbon Humberto Delgado
Tue 8/18
6:45 pm-10:17 pm
2 stops34h 32m
$923
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Mon 8/10
7:05 pm-10:30 am
2 stops32h 25m
Lisbon Humberto Delgado
Tue 8/18
11:25 am-4:48 pm
3 stops60h 23m
$955
SpokaneLisbon
GEG - LIS
GEGLIS
Spokane
Sat 8/15
1:38 pm-9:20 am
2 stops35h 42m
Lisbon Humberto Delgado
Sat 8/22
11:25 am-2:58 pm
2 stops35h 33m
$982
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 9/15
1:15 pm-2:55 pm
2 stops18h 40m
Lisbon Humberto Delgado
Sat 9/26
5:00 am-6:35 pm
2 stops20h 35m
$1,000
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 9/15
1:18 pm-11:25 pm
2 stops27h 07m
Lisbon Humberto Delgado
Sat 9/26
6:35 am-10:17 pm
2 stops22h 42m
$1,024
Quickest round-trip
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Mon 6/1
12:55 pm-2:55 pm
2 stops19h 00m
Lisbon Humberto Delgado
Wed 6/10
5:00 am-5:28 pm
2 stops19h 28m
$1,036
JacksonLisbon
JAC - LIS
JACLIS
Jackson Hole
Wed 9/2
4:25 pm-9:20 am
2 stops33h 55m
Lisbon Humberto Delgado
Thu 9/10
11:25 am-9:05 pm
2 stops40h 40m
$1,045
Showing 1-10 of 39 resultsSorted by cheapest first
Best time to book a flight from Idaho to Portugal
Have a flexible travel schedule? Discover the best time to fly to Portugal from Idaho with our price prediction graph.
BOI-LIS
GEG-LIS
JAC-LIS
GEG-FAO
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 Portugal
USID-PT0
BOI-LIS
GEG-LIS
JAC-LIS
GEG-FAO
No data available for this route at this time. Please check back soon.
Related info for your journey
Find useful and relevant information for your journey from Idaho to Portugal. 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 Idaho to Portugal
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Portugal by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Idaho to Portugal by cabin class
Find flights from Idaho to Portugal, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Idaho and Portugal flights
Browse other Idaho and Portugal flight options. Last updated on April 12, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Idaho to Portugal flights
Consider these flights traveling from Idaho to Portugal.
Fly to Portugal regions
Consider these flights traveling to Portugal regions.
Top 2 airlines flying from Idaho to Portugal
Discover the top 2 airlines that operate flights from Idaho to Portugal. 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 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$549 | Average$827 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$618 | Average$982 | FlexibilityNo cancel fee | On-time69% |