$354+ 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 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Sep 14 — Sep 211
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 August 15, 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 August 15, 2026.
This Expedia deal was found by Cheapflights users on 8/13. 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 11/221:10 pm -
2 stops36h 10m
Fri 11/275:00 am -
2 stops23h 57m
Deal found 8/13![Multiple Airlines logo]()
$716
This United Airlines deal was found by Cheapflights users on 8/13. 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 12/53:30 pm -
2 stops33h 40m
Tue 12/812:50 pm -
2 stops29h 32m
Deal found 8/13![United Airlines logo]()
$722
This United Airlines deal was found by Cheapflights users on 8/11. 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.
Tue 11/107:00 am -
2 stops20h 05m
Thu 11/1210:55 am -
2 stops33h 30m
Deal found 8/11![United Airlines logo]()
$727
This United Airlines deal was found by Cheapflights users on 8/13. 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 10/267:00 am -
2 stops21h 40m
Tue 11/105:00 am -
2 stops22h 57m
Deal found 8/13![United Airlines logo]()
$757
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/295:00 am -
2 stops21h 05m
Fri 1/811:20 am -
3 stops41h 49m
Deal found 8/14![United Airlines logo]()
$767
This Delta deal was found by Cheapflights users on 8/11. 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 12/297:00 am -
2 stops20h 25m
Fri 1/85:00 am -
2 stops22h 27m
Deal found 8/11![Delta logo]()
$776
This KLM deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/57:25 am -
2 stops17h 35m
Tue 12/83:35 pm -
2 stops31h 52m
Deal found 8/14![KLM logo]()
$781
This Expedia deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:00 am -
2 stops33h 25m
Sat 11/2112:30 pm -
2 stops30h 06m
Deal found 8/14![Iberia logo]()
$800
This FlightHub deal was found by Cheapflights users on 8/13. 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 11/1012:37 pm -
2 stops35h 18m
Sat 11/2111:20 am -
2 stops37h 43m
Deal found 8/13![Air Canada logo]()
$804
This American Airlines deal was found by Cheapflights users on 8/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/11:27 pm -
2 stops18h 23m
Sat 11/76:45 pm -
2 stops23h 44m
Deal found 8/12![American Airlines logo]()
$806
This Air France deal was found by Cheapflights users on 8/12. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/41:13 pm -
2 stops18h 57m
Sun 11/83:35 pm -
2 stops31h 52m
Deal found 8/12![Multiple Airlines logo]()
$810
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Mon 12/146:20 am -
2 stops21h 20m
Tue 12/2911:20 am -
2 stops41h 22m
Deal found 8/12![United Airlines logo]()
$815
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 August 15, 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 August 15, 2026.
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/53:30 pm -
2 stops33h 40m
Tue 12/812:50 pm -
2 stops29h 32m
Deal found 8/14![United Airlines logo]()
$722
This Delta deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/297:00 am -
2 stops24h 10m
Fri 1/85:00 am -
2 stops22h 27m
Deal found 8/14![Delta logo]()
$776
This Air Canada deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/67:00 am -
3 stops19h 20m
Tue 1/1212:50 pm -
2 stops27h 53m
Deal found 8/14![Multiple Airlines logo]()
$809
This Air Canada deal was found by Cheapflights users on 8/13. 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 12/1911:30 pm -
2 stops49h 50m
Thu 12/318:55 am -
2 stops45h 27m
Deal found 8/13![Air Canada logo]()
$969
This Ovago deal was found by Cheapflights users on 8/13. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/275:00 am -
2 stops26h 05m
Sun 10/43:25 pm -
2 stops37h 41m
Deal found 8/13![Lufthansa logo]()
$1,172
This Ovago deal was found by Cheapflights users on 8/11. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/11:47 pm -
2 stops17h 43m
Mon 9/217:10 am -
2 stops34h 09m
Deal found 8/11![British Airways logo]()
$1,419
This United Airlines deal was found by Cheapflights users on 8/13. 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 2/75:00 am -
2 stops19h 10m
Tue 2/95:00 am -
2 stops24h 09m
Deal found 8/13![United Airlines logo]()
$730
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Sun 2/77:00 am -
2 stops18h 10m
Tue 2/910:15 am -
2 stops30h 28m
Deal found 8/12![United Airlines logo]()
$742
This KLM deal was found by Cheapflights users on 8/13. 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 12/297:00 am -
2 stops19h 30m
Tue 1/54:10 pm -
2 stops34h 38m
Deal found 8/13![Multiple Airlines logo]()
$884
This Delta deal was found by Cheapflights users on 8/11. 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.
Thu 10/158:25 am -
2 stops23h 30m
Sat 10/245:35 am -
2 stops23h 33m
Deal found 8/11![Delta logo]()
$907
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/295:00 am -
2 stops21h 05m
Fri 1/811:20 am -
3 stops41h 49m
Deal found 8/14![United Airlines logo]()
$767
This United Airlines deal was found by Cheapflights users on 8/13. 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 1/14:10 pm -
2 stops57h 10m
Fri 1/86:00 am -
3 stops23h 09m
Deal found 8/13![United Airlines logo]()
$796
This Delta deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/133:59 pm -
2 stops17h 51m
Sun 9/205:00 am -
2 stops24h 15m
Deal found 8/14![Delta logo]()
$999
This United Airlines deal was found by Cheapflights users on 8/11. 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.
Mon 12/146:20 am -
2 stops21h 20m
Tue 12/2911:20 am -
2 stops41h 22m
Deal found 8/11![United Airlines logo]()
$815
This United deal was found by Cheapflights users on 8/11. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/77:00 am -
1 stop18h 10m
Sun 2/2110:40 am -
2 stops30h 23m
Deal found 8/11![Multiple Airlines logo]()
$1,103
This United Airlines deal was found by Cheapflights users on 8/11. 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.
Sun 2/74:25 pm -
2 stops32h 45m
Sun 2/2110:50 am -
3 stops41h 12m
Deal found 8/11![United Airlines logo]()
$914
This United Airlines deal was found by Cheapflights users on 8/11. 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.
Sat 12/1911:30 pm -
2 stops49h 50m
Thu 12/318:55 am -
2 stops45h 27m
Deal found 8/11![United Airlines logo]()
$969
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1412:13 pm -
2 stops15h 17m
Tue 9/225:05 am -
2 stops23h 03m
Deal found 8/14![United Airlines logo]()
$1,058
This Gotogate deal was found by Cheapflights users on 8/13. 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.
Sun 9/2710:37 am -
2 stops17h 23m
Sun 10/411:15 am -
3 stops20h 40m
Deal found 8/13![Multiple Airlines logo]()
$2,693
Last-minute flights from Idaho to PortugalDiscover last-minute flight deals from Idaho to Portugal. Data last updated August 15, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Portugal. Data last updated August 15, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 8/11. 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.
Thu 8/1310:35 am -
2 stops24h 15m
Wed 8/195:00 am -
2 stops20h 48m
Deal found 8/11![Delta logo]()
$1,049
This Ovago deal was found by Cheapflights users on 8/12. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/24:30 pm -
2 stops23h 45m
Thu 9/106:35 am -
2 stops34h 44m
Deal found 8/12![Multiple Airlines logo]()
$1,343
This Delta deal was found by Cheapflights users on 8/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/811:10 am -
2 stops22h 40m
Mon 9/145:00 am -
2 stops25h 56m
Deal found 8/12![Delta logo]()
$1,200
This United Airlines deal was found by Cheapflights users on 8/11. 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.
Thu 9/105:00 am -
2 stops20h 20m
Sun 9/205:05 am -
2 stops35h 30m
Deal found 8/11![United Airlines logo]()
$1,075
This Delta deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/133:59 pm -
2 stops17h 51m
Sun 9/205:00 am -
2 stops24h 15m
Deal found 8/14![Delta logo]()
$999
This Delta deal was found by Cheapflights users on 8/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/143:59 pm -
2 stops17h 51m
Sun 9/275:00 am -
2 stops24h 15m
Deal found 8/12![Delta logo]()
$1,049
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1412:13 pm -
2 stops15h 17m
Tue 9/225:05 am -
2 stops23h 03m
Deal found 8/14![United Airlines logo]()
$1,058
This Delta deal was found by Cheapflights users on 8/11. 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.
Fri 9/253:59 pm -
2 stops17h 51m
Fri 10/25:00 am -
2 stops24h 15m
Deal found 8/11![Delta logo]()
$880
This Delta deal was found by Cheapflights users on 8/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/263:28 pm -
2 stops19h 22m
Sat 10/35:35 am -
2 stops18h 44m
Deal found 8/12![Delta logo]()
$947
This Ovago deal was found by Cheapflights users on 8/13. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/271:52 pm -
2 stops26h 13m
Sun 10/47:20 am -
2 stops35h 04m
Deal found 8/13![British Airways logo]()
$1,117
This Ovago deal was found by Cheapflights users on 8/13. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/275:00 am -
2 stops26h 05m
Sun 10/43:25 pm -
2 stops37h 41m
Deal found 8/13![Lufthansa logo]()
$1,172
This Delta deal was found by Cheapflights users on 8/11. 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 9/2911:10 am -
2 stops22h 40m
Wed 10/145:00 am -
2 stops23h 08m
Deal found 8/11![Delta logo]()
$820
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 August 15, 2026.
Search for one-way flight options from Idaho to Portugal. Find affordable one-way fares based on user searches. Data last updated August 15, 2026.
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/214:10 pm -
2 stops57h 10m
Deal found 8/14![United Airlines logo]()
$354
This American Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/62:08 pm -
2 stops17h 27m
Deal found 8/14![American Airlines logo]()
$460
This Kiwi.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:03 am -
3 stops31h 42m
Deal found 8/14![Multiple Airlines logo]()
$521
This Air Canada deal was found by Cheapflights users on 8/11. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2111:22 am -
3 stops19h 53m
Deal found 8/11![Air Canada logo]()
$1,583
This BusinessClass deal was found by Cheapflights users on 8/11. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/313:44 pm -
2 stops18h 11m
Deal found 8/11![British Airways logo]()
$12,331
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 August 15, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $716 (Expedia) |
One-way from | $354 (United Airlines) |
Popular in | December |
Cheapest in | April |
Average price | $1,079 |
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 August 15, 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
JacksonLisbon
JAC Jackson Hole - LIS Lisbon Humberto Delgado
JACLIS
Jackson Hole
Sat 12/5
3:30 pm-8:10 am
2 stops33h 40m
Lisbon Humberto Delgado
Tue 12/8
12:50 pm-11:22 am
2 stops29h 32m
$722
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Sun 2/7
5:00 am-8:10 am
2 stops19h 10m
Lisbon Humberto Delgado
Tue 2/9
5:00 am-9:09 pm
2 stops24h 09m
$730
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Sun 2/7
7:00 am-8:10 am
2 stops18h 10m
Lisbon Humberto Delgado
Tue 2/9
10:15 am-9:43 am
2 stops30h 28m
$742
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Tue 12/29
5:00 am-10:05 am
2 stops21h 05m
Lisbon Humberto Delgado
Fri 1/8
11:20 am-9:09 pm
3 stops41h 49m
$767
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Tue 12/29
7:00 am-3:10 pm
2 stops24h 10m
Lisbon Humberto Delgado
Fri 1/8
5:00 am-7:27 pm
2 stops22h 27m
$776
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Fri 1/1
4:10 pm-9:20 am
2 stops57h 10m
Lisbon Humberto Delgado
Fri 1/8
6:00 am-9:09 pm
3 stops23h 09m
$796
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Wed 1/6
7:00 am-9:20 am
3 stops19h 20m
Lisbon Humberto Delgado
Tue 1/12
12:50 pm-9:43 am
2 stops27h 53m
$809
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Mon 12/14
6:20 am-10:40 am
2 stops21h 20m
Lisbon Humberto Delgado
Tue 12/29
11:20 am-9:42 pm
2 stops41h 22m
$815
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Tue 12/29
7:00 am-10:30 am
2 stops19h 30m
Lisbon Humberto Delgado
Tue 1/5
4:10 pm-6:48 pm
2 stops34h 38m
$884
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Thu 10/15
8:25 am-2:55 pm
2 stops23h 30m
Lisbon Humberto Delgado
Sat 10/24
5:35 am-10:08 pm
2 stops23h 33m
$907
Showing 1-10 of 23 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.
JAC-LIS
GEG-LIS
BOI-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
JAC-LIS
GEG-LIS
BOI-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.
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 August 15, 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 August 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$467 | Average$937 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$549 | Average$827 | FlexibilityNo cancel fee | On-timeN/A |