$525+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
May 31 — Jun 71
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Idaho to Portugal
Cheapest
Best
Last-minute
One-way
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 May 1, 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 May 1, 2026.
This Air Canada deal was found by Cheapflights users on 4/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/197:05 pm
BOI
- LIS
2 stops31h 15m
Air Canada
Tue 11/31:00 pm
LIS
- BOI
2 stops37h 16m
Air Canada
Deal found 4/27![Air Canada logo]()
$727
This United Airlines deal was found by Cheapflights users on 4/28. 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 12/295:00 am
GEG
- LIS
2 stops19h 10m
United Airlines
Fri 1/81:00 pm
LIS
- GEG
2 stops40h 09m
United Airlines
Deal found 4/28![United Airlines logo]()
$728
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:25 am
BOI
- LIS
2 stops18h 55m
United Airlines
Tue 11/35:00 am
LIS
- BOI
2 stops25h 59m
United Airlines
Deal found 4/27![United Airlines logo]()
$731
This Air Canada deal was found by Cheapflights users on 4/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:44 pm
BOI
- LIS
2 stops35h 16m
Air Canada
Tue 11/31:00 pm
LIS
- BOI
2 stops41h 59m
Air Canada
Deal found 4/27![Air Canada logo]()
$737
This Delta deal was found by Cheapflights users on 4/27. 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.
Sun 10/181:15 pm
BOI
- LIS
2 stops18h 40m
Delta
Mon 11/212:20 pm
LIS
- BOI
2 stops34h 10m
Delta
Deal found 4/27![Delta logo]()
$752
This Delta deal was found by Cheapflights users on 4/27. 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.
Sat 10/245:45 pm
BOI
- LIS
2 stops33h 15m
Delta
Mon 11/212:20 pm
LIS
- BOI
2 stops35h 29m
Delta
Deal found 4/27![Delta logo]()
$763
This Finnair deal was found by Cheapflights users on 4/28. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/137:00 am
BOI
- LIS
2 stops24h 50m
Multiple Airlines
Thu 11/194:10 pm
LIS
- BOI
2 stops36h 53m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$777
This Air Canada deal was found by Cheapflights users on 4/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:25 am
BOI
- LIS
2 stops21h 40m
Air Canada
Tue 11/31:00 pm
LIS
- BOI
2 stops35h 55m
Air Canada
Deal found 4/27![Air Canada logo]()
$782
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:25 am
BOI
- LIS
2 stops18h 55m
United Airlines
Fri 10/301:00 pm
LIS
- BOI
2 stops30h 30m
United Airlines
Deal found 4/27![United Airlines logo]()
$784
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:15 am
BOI
- LIS
2 stops18h 05m
United Airlines
Thu 10/295:00 am
LIS
- BOI
2 stops24h 59m
United Airlines
Deal found 4/27![United Airlines logo]()
$787
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:25 am
BOI
- LIS
2 stops18h 55m
United Airlines
Wed 10/285:00 am
LIS
- BOI
2 stops22h 15m
United Airlines
Deal found 4/27![United Airlines logo]()
$788
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Fri 10/304:25 pm
JAC
- LIS
2 stops57h 45m
United Airlines
Sat 11/71:00 pm
LIS
- JAC
2 stops31h 29m
United Airlines
Deal found 4/28![United Airlines logo]()
$789
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 May 1, 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 May 1, 2026.
This Delta deal was found by Cheapflights users on 4/27. 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.
Mon 10/191:15 pm
BOI
- LIS
2 stops21h 35m
Delta
Mon 11/212:20 pm
LIS
- BOI
2 stops34h 10m
Delta
Deal found 4/27![Delta logo]()
$752
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:25 am
BOI
- LIS
2 stops18h 55m
United Airlines
Wed 10/285:00 am
LIS
- BOI
2 stops22h 15m
United Airlines
Deal found 4/27![United Airlines logo]()
$788
This Air France deal was found by Cheapflights users on 5/1. 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.
Mon 6/154:30 pm
GEG
- LIS
2 stops17h 20m
Multiple Airlines
Mon 6/225:00 am
LIS
- GEG
2 stops18h 40m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$1,238
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:25 am
BOI
- LIS
2 stops18h 55m
United Airlines
Thu 10/295:00 am
LIS
- BOI
2 stops24h 59m
United Airlines
Deal found 4/27![United Airlines logo]()
$788
This Delta deal was found by Cheapflights users on 4/27. 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.
Sun 10/1811:30 pm
BOI
- LIS
2 stops25h 30m
Delta
Sun 11/111:15 am
LIS
- BOI
2 stops19h 40m
Delta
Deal found 4/27![Delta logo]()
$793
This Delta deal was found by Cheapflights users on 4/27. 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.
Tue 10/205:40 am
BOI
- LIS
2 stops19h 20m
Delta
Sun 11/111:15 am
LIS
- BOI
2 stops19h 40m
Delta
Deal found 4/27![Delta logo]()
$793
This United Airlines deal was found by Cheapflights users on 5/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/185:00 am
GEG
- LIS
2 stops20h 20m
United Airlines
Thu 10/2211:25 am
LIS
- GEG
2 stops41h 28m
United Airlines
Deal found 5/1![United Airlines logo]()
$834
This Delta deal was found by Cheapflights users on 4/27. 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.
Fri 10/2311:30 pm
BOI
- LIS
2 stops27h 30m
Delta
Sun 11/111:15 am
LIS
- BOI
2 stops32h 24m
Delta
Deal found 4/27![Delta logo]()
$843
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/23:54 pm
GEG
- LIS
2 stops59h 11m
United Airlines
Mon 10/197:25 am
LIS
- GEG
2 stops45h 28m
United Airlines
Deal found 4/27![United Airlines logo]()
$874
This Delta deal was found by Cheapflights users on 4/28. 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.
Thu 10/1510:38 am
BOI
- LIS
2 stops24h 12m
Delta
Sat 10/245:00 am
LIS
- BOI
2 stops22h 17m
Delta
Deal found 4/28![Delta logo]()
$898
This United Airlines deal was found by Cheapflights users on 5/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:00 am
JAC
- LIS
2 stops20h 05m
United Airlines
Thu 9/1010:25 am
LIS
- JAC
1 stop17h 40m
United Airlines
Deal found 5/1![United Airlines logo]()
$932
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Tue 9/87:05 am
BOI
- LIS
2 stops42h 15m
United Airlines
Sat 9/1911:25 am
LIS
- BOI
2 stops53h 10m
United Airlines
Deal found 4/29![United Airlines logo]()
$986
This Delta deal was found by Cheapflights users on 5/1. 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.
Tue 9/157:15 am
BOI
- LIS
2 stops17h 45m
Delta
Sat 9/2610:00 am
LIS
- BOI
2 stops20h 56m
Delta
Deal found 5/1![Delta logo]()
$988
This Delta deal was found by Cheapflights users on 5/1. 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.
Wed 5/204:15 pm
GEG
- LIS
2 stops17h 35m
Delta
Tue 5/265:00 am
LIS
- GEG
2 stops19h 57m
Delta
Deal found 5/1![Delta logo]()
$1,141
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2912:37 pm
GEG
- LIS
2 stops26h 08m
United Airlines
Tue 6/211:25 am
LIS
- GEG
2 stops44h 26m
United Airlines
Deal found 4/27![United Airlines logo]()
$1,232
This Delta deal was found by Cheapflights users on 4/29. 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.
Mon 6/2212:35 pm
GEG
- LIS
2 stops21h 15m
Delta
Tue 6/305:35 am
LIS
- GEG
2 stops21h 51m
Delta
Deal found 4/29![Delta logo]()
$1,175
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/225:00 am
GEG
- LIS
2 stops22h 00m
United Airlines
Tue 6/301:00 pm
LIS
- GEG
2 stops34h 11m
United Airlines
Deal found 4/27![United Airlines logo]()
$1,274
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:00 am
JAC
- LIS
1 stop18h 20m
United Airlines
Sat 10/105:05 am
LIS
- JAC
2 stops20h 47m
United Airlines
Deal found 4/27![United Airlines logo]()
$1,302
This BusinessClass deal was found by Cheapflights users on 4/26. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/123:39 pm
JAC
- LIS
2 stops17h 01m
Multiple Airlines
Wed 8/2611:05 am
LIS
- JAC
2 stops31h 03m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$4,147
Last-minute flights from Idaho to PortugalDiscover last-minute flight deals from Idaho to Portugal. Data last updated May 1, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Portugal. Data last updated May 1, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 4/27. 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.
Sat 5/22:33 pm
BOI
- LIS
2 stops40h 07m
Lufthansa
Sat 5/92:30 pm
LIS
- BOI
2 stops34h 45m
Lufthansa
Deal found 4/27![Lufthansa logo]()
$952
This Air France deal was found by Cheapflights users on 5/1. 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.
Sun 5/36:00 am
GEG
- LIS
2 stops20h 45m
Multiple Airlines
Tue 5/195:00 am
LIS
- GEG
2 stops21h 01m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$923
This Expedia deal was found by Cheapflights users on 5/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/163:23 pm
BOI
- LIS
2 stops34h 37m
Scandinavian Airlines
Fri 5/229:15 pm
LIS
- BOI
2 stops31h 58m
Scandinavian Airlines
Deal found 5/1![Scandinavian Airlines logo]()
$1,125
This Delta deal was found by Cheapflights users on 5/1. 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.
Wed 5/204:15 pm
GEG
- LIS
2 stops17h 35m
Delta
Tue 5/265:00 am
LIS
- GEG
2 stops19h 57m
Delta
Deal found 5/1![Delta logo]()
$1,141
This KLM deal was found by Cheapflights users on 4/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/283:14 pm
BOI
- LIS
2 stops20h 31m
KLM
Thu 6/45:00 am
LIS
- BOI
2 stops19h 07m
KLM
Deal found 4/28![KLM logo]()
$1,065
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2912:37 pm
GEG
- LIS
2 stops26h 08m
United Airlines
Tue 6/211:25 am
LIS
- GEG
2 stops44h 26m
United Airlines
Deal found 4/27![United Airlines logo]()
$1,232
This Air France deal was found by Cheapflights users on 4/28. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/12:23 pm
BOI
- LIS
2 stops20h 27m
Air France
Wed 6/105:35 am
LIS
- BOI
2 stops19h 17m
Air France
Deal found 4/28![Air France logo]()
$997
This Delta deal was found by Cheapflights users on 4/30. 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.
Mon 6/13:23 pm
BOI
- LIS
2 stops19h 27m
Delta
Wed 6/105:00 am
LIS
- BOI
2 stops21h 13m
Delta
Deal found 4/30![Delta logo]()
$1,168
This Delta deal was found by Cheapflights users on 5/1. 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 6/1411:15 am
GEG
- LIS
2 stops23h 30m
Delta
Mon 6/295:00 am
LIS
- GEG
2 stops22h 26m
Delta
Deal found 5/1![Delta logo]()
$1,243
This Air France deal was found by Cheapflights users on 5/1. 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.
Mon 6/154:30 pm
GEG
- LIS
2 stops17h 20m
Multiple Airlines
Mon 6/225:00 am
LIS
- GEG
2 stops18h 40m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$1,238
This Delta deal was found by Cheapflights users on 4/29. 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.
Mon 6/2212:35 pm
GEG
- LIS
2 stops21h 15m
Delta
Tue 6/305:35 am
LIS
- GEG
2 stops21h 51m
Delta
Deal found 4/29![Delta logo]()
$1,175
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/225:00 am
GEG
- LIS
2 stops22h 00m
United Airlines
Tue 6/301:00 pm
LIS
- GEG
2 stops34h 11m
United Airlines
Deal found 4/27![United Airlines logo]()
$1,274
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 May 1, 2026.
Search for one-way flight options from Idaho to Portugal. Find affordable one-way fares based on user searches. Data last updated May 1, 2026.
This American Airlines deal was found by Cheapflights users on 4/30. 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 9/95:45 am
GEG
- LIS
2 stops19h 20m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$525
This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
Thu 9/1010:09 am
GEG
- LIS
3 stops36h 21m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$575
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/206:23 am
BOI
- LIS
3 stops30h 47m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$584
This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
Fri 6/58:51 pm
BOI
- LIS
2 stops29h 44m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$597
This Gotogate deal was found by Cheapflights users on 4/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/205:00 am
BOI
- LIS
2 stops21h 20m
Air Canada
Deal found 4/29![Air Canada logo]()
$617
This Delta deal was found by Cheapflights users on 5/1. 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.
Tue 6/212:15 pm
BOI
- LIS
2 stops22h 35m
Delta
Deal found 5/1![Delta logo]()
$618
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Sat 5/164:03 pm
GEG
- LIS
2 stops32h 17m
United Airlines
Deal found 4/28![United Airlines logo]()
$677
This British Airways deal was found by Cheapflights users on 4/28. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/283:12 pm
BOI
- LIS
2 stops19h 33m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$850
This United Airlines deal was found by Cheapflights users on 4/28. 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 6/210:41 am
BOI
- LIS
2 stops14h 39m
United Airlines
Deal found 4/28![United Airlines logo]()
$852
This Air Canada deal was found by Cheapflights users on 4/28. 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.
Sun 6/288:25 am
BOI
- LIS
3 stops17h 55m
Air Canada
Deal found 4/28![Air Canada logo]()
$1,010
This Air Canada deal was found by Cheapflights users on 4/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/210:41 am
BOI
- LIS
3 stops17h 24m
Air Canada
Deal found 4/30![Air Canada logo]()
$1,015
This Justfly.com deal was found by Cheapflights users on 4/26. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/161:50 pm
GEG
- LIS
1 stop17h 00m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$1,138
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 May 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $727 (Air Canada) |
One-way from | $525 (American Airlines) |
Popular in | December |
Cheapest in | February |
Average price | $996 |
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 May 1, 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
Mon 10/19
1:15 pm-5:50 pm
2 stops21h 35m
Lisbon Humberto Delgado
Mon 11/2
12:20 pm-3:30 pm
2 stops34h 10m
$752
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Sun 10/18
6:25 am-8:20 am
2 stops18h 55m
Lisbon Humberto Delgado
Wed 10/28
5:00 am-9:15 pm
2 stops22h 15m
$788
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Sun 10/18
6:25 am-8:20 am
2 stops18h 55m
Lisbon Humberto Delgado
Thu 10/29
5:00 am-11:59 pm
2 stops24h 59m
$788
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Sun 10/18
11:30 pm-8:00 am
2 stops25h 30m
Lisbon Humberto Delgado
Sun 11/1
11:15 am-11:55 pm
2 stops19h 40m
$793
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 10/20
5:40 am-8:00 am
2 stops19h 20m
Lisbon Humberto Delgado
Sun 11/1
11:15 am-11:55 pm
2 stops19h 40m
$793
SpokaneLisbon
GEG - LIS
GEGLIS
Spokane
Tue 8/18
5:00 am-9:20 am
2 stops20h 20m
Lisbon Humberto Delgado
Thu 10/22
11:25 am-8:53 pm
2 stops41h 28m
$834
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Fri 10/23
11:30 pm-10:00 am
2 stops27h 30m
Lisbon Humberto Delgado
Sun 11/1
11:15 am-12:39 pm
2 stops32h 24m
$843
SpokaneLisbon
GEG - LIS
GEGLIS
Spokane
Fri 10/2
3:54 pm-11:05 am
2 stops59h 11m
Lisbon Humberto Delgado
Mon 10/19
7:25 am-8:53 pm
2 stops45h 28m
$874
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Thu 10/15
10:38 am-5:50 pm
2 stops24h 12m
Lisbon Humberto Delgado
Sat 10/24
5:00 am-8:17 pm
2 stops22h 17m
$898
JacksonLisbon
JAC - LIS
JACLIS
Jackson Hole
Wed 9/2
8:00 am-11:05 am
2 stops20h 05m
Lisbon Humberto Delgado
Thu 9/10
10:25 am-9:05 pm
1 stop17h 40m
$932
Showing 1-10 of 31 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
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
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.
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
Flights by cabin class
Other flight options
Popular flights
Top destinations
Top regions
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 May 1, 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 May 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$549 | Average$833 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$618 | Average$982 | FlexibilityNo cancel fee | On-time69% |