$469+ Cheap flights from Idaho to Portugal
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Oct 20 — Oct 271
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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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
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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 September 20, 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 September 20, 2026.
This American Airlines deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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 11/41:24 pm -
2 stops18h 31m
Wed 11/118:45 pm -
2 stops21h 40m
Deal found 9/19![American Airlines logo]()
$577
This KLM deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/177:25 am -
2 stops17h 35m
Wed 11/255:30 am -
2 stops17h 53m
Deal found 9/18![Multiple Airlines logo]()
$602
This Air France deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/157:00 am -
2 stops20h 25m
Wed 2/105:30 am -
2 stops21h 18m
Deal found 9/16![Air France logo]()
$607
This Delta deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/811:18 am -
2 stops19h 52m
Wed 11/1810:00 am -
2 stops21h 55m
Deal found 9/18![Delta logo]()
$610
This Delta deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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 11/39:53 am -
2 stops23h 37m
Tue 11/105:30 am -
2 stops18h 38m
Deal found 9/19![Delta logo]()
$616
This Iberia deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:00 am -
2 stops17h 40m
Sat 11/216:45 pm -
2 stops23h 43m
Deal found 9/18![Multiple Airlines logo]()
$639
This United Airlines deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/115:00 am -
2 stops20h 10m
Sun 11/2210:15 am -
2 stops19h 44m
Deal found 9/18![United Airlines logo]()
$641
This Expedia deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/142:41 pm -
2 stops25h 44m
Wed 10/218:45 pm -
2 stops56h 44m
Deal found 9/16![Iberia logo]()
$662
This Delta deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/135:00 am -
2 stops19h 00m
Sun 12/65:00 am -
2 stops23h 18m
Deal found 9/18![Delta logo]()
$702
This Finnair deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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 12/2812:21 pm -
2 stops20h 04m
Thu 1/74:10 pm -
2 stops34h 49m
Deal found 9/19![Finnair logo]()
$716
This Delta deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/63:30 pm -
2 stops18h 20m
Tue 10/135:00 am -
2 stops21h 45m
Deal found 9/18![Delta logo]()
$729
This Delta deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/51:00 pm -
2 stops21h 45m
Thu 10/159:50 am -
2 stops22h 00m
Deal found 9/17![Delta logo]()
$740
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 September 20, 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 September 20, 2026.
This American Airlines deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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 11/41:24 pm -
2 stops18h 31m
Wed 11/118:45 pm -
2 stops21h 40m
Deal found 9/19![American Airlines logo]()
$577
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/286:20 am -
2 stops17h 35m
Tue 3/166:05 am -
2 stops21h 10m
Deal found 9/17![United Airlines logo]()
$600
This KLM deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/177:25 am -
2 stops17h 35m
Wed 11/255:30 am -
2 stops17h 53m
Deal found 9/18![Multiple Airlines logo]()
$602
This Air France deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/157:00 am -
2 stops20h 25m
Wed 2/105:30 am -
2 stops21h 18m
Deal found 9/16![Air France logo]()
$607
This Delta deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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 11/39:53 am -
2 stops23h 37m
Tue 11/105:30 am -
2 stops18h 38m
Deal found 9/19![Delta logo]()
$616
This Finnair deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1912:18 pm -
2 stops20h 07m
Tue 12/14:10 pm -
2 stops37h 32m
Deal found 9/16![Finnair logo]()
$780
This Ovago deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:00 am -
2 stops32h 05m
Sat 10/247:10 am -
2 stops37h 12m
Deal found 9/15![British Airways logo]()
$1,062
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/227:00 am -
2 stops18h 10m
Tue 1/2610:15 am -
2 stops30h 48m
Deal found 9/16![United Airlines logo]()
$736
This Delta deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/51:00 pm -
2 stops21h 45m
Thu 10/159:50 am -
2 stops22h 00m
Deal found 9/17![Delta logo]()
$740
This American Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/51:21 pm -
2 stops36h 44m
Mon 12/1411:05 am -
2 stops32h 34m
Deal found 9/15![American Airlines logo]()
$755
This United Airlines deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2911:42 pm -
2 stops24h 28m
Fri 1/811:20 am -
2 stops43h 03m
Deal found 9/18![United Airlines logo]()
$741
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/1111:48 am -
2 stops37h 22m
Thu 1/148:55 am -
2 stops58h 00m
Deal found 9/16![United Airlines logo]()
$743
This Delta deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:36 pm -
2 stops19h 14m
Fri 10/235:00 am -
2 stops19h 14m
Deal found 9/18![Delta logo]()
$830
This Kiwi.com deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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 11/410:13 am -
1 stop18h 17m
Wed 11/1110:00 am -
1 stop18h 33m
Deal found 9/19![Multiple Airlines logo]()
$995
This Finnair deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/153:24 pm -
2 stops25h 01m
Sat 10/244:40 pm -
2 stops36h 49m
Deal found 9/17![Finnair logo]()
$1,079
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/29:00 am -
2 stops19h 35m
Sun 12/61:25 pm -
2 stops40h 00m
Deal found 9/16![United Airlines logo]()
$857
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/15:22 pm -
2 stops31h 48m
Mon 5/3111:25 am -
2 stops36h 24m
Deal found 9/16![United Airlines logo]()
$913
This United Airlines deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1611:22 am -
2 stops14h 58m
Fri 11/2011:20 am -
2 stops33h 09m
Deal found 9/19![United Airlines logo]()
$1,185
This United Airlines deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/66:15 am -
2 stops18h 55m
Wed 12/911:20 am -
2 stops33h 19m
Deal found 9/19![United Airlines logo]()
$1,189
Last-minute flights from Idaho to PortugalDiscover last-minute flight deals from Idaho to Portugal. Data last updated September 20, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Portugal. Data last updated September 20, 2026 and is based on user searches.
This Finnair deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:02 am -
2 stops33h 23m
Sat 10/36:55 pm -
2 stops34h 35m
Deal found 9/15![Finnair logo]()
$1,069
This Delta deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/51:00 pm -
2 stops21h 45m
Thu 10/159:50 am -
2 stops22h 00m
Deal found 9/17![Delta logo]()
$740
This Delta deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/63:30 pm -
2 stops18h 20m
Tue 10/135:00 am -
2 stops21h 45m
Deal found 9/18![Delta logo]()
$729
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/61:00 pm -
2 stops20h 50m
Sun 10/115:00 am -
2 stops24h 10m
Deal found 9/16![Delta logo]()
$983
This United Airlines deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:00 am -
2 stops43h 20m
Sat 10/245:05 am -
2 stops39h 24m
Deal found 9/18![United Airlines logo]()
$978
This Expedia deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/142:41 pm -
2 stops25h 44m
Wed 10/218:45 pm -
2 stops56h 44m
Deal found 9/16![Iberia logo]()
$662
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:57 am -
1 stop19h 53m
Wed 10/219:40 am -
1 stop18h 40m
Deal found 9/16![Multiple Airlines logo]()
$992
This Ovago deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:00 am -
2 stops32h 05m
Sat 10/247:10 am -
2 stops37h 12m
Deal found 9/15![British Airways logo]()
$1,062
This Finnair deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/153:24 pm -
2 stops25h 01m
Sat 10/244:40 pm -
2 stops36h 49m
Deal found 9/16![Finnair logo]()
$1,079
This Delta deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:36 pm -
2 stops19h 14m
Fri 10/235:00 am -
2 stops19h 14m
Deal found 9/18![Delta logo]()
$830
This Delta deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:10 am -
2 stops22h 05m
Fri 10/235:00 am -
2 stops24h 10m
Deal found 9/18![Delta logo]()
$960
This Orbitz deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1712:49 pm -
2 stops50h 36m
Sat 10/2411:25 am -
2 stops59h 57m
Deal found 9/17![Multiple Airlines logo]()
$1,113
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 September 20, 2026.
Search for one-way flight options from Idaho to Portugal. Find affordable one-way fares based on user searches. Data last updated September 20, 2026.
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/71:10 pm -
2 stops35h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![United Airlines logo]()
$469
This Delta deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/115:10 am -
2 stops18h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Delta logo]()
$539
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/253:28 pm -
2 stops19h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Delta logo]()
$604
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/217:00 am -
2 stops23h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Delta logo]()
$608
This United Airlines deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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 stops56h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![United Airlines logo]()
$610
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:59 pm -
3 stops32h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$636
This FlightHub deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/77:00 am -
1 stop21h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$963
This Cathay Pacific deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/217:00 am -
3 stops45h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$7,768
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 September 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $577 (American Airlines) |
One-way from | $469 (United Airlines) |
Popular in | December |
Cheapest in | April |
Average price | $1,490 |
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 7,457,451 searches. Data last updated September 20, 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
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Sat 11/7
1:10 pm-8:10 am
2 stops35h 00m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$469
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Wed 11/4
1:24 pm-2:55 pm
2 stops18h 31m
Lisbon Humberto Delgado
Wed 11/11
8:45 pm-11:25 am
2 stops21h 40m
$577
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Sun 2/28
6:20 am-6:55 am
2 stops17h 35m
Lisbon Humberto Delgado
Tue 3/16
6:05 am-9:15 pm
2 stops21h 10m
$600
JacksonLisbon
JAC Jackson Hole - LIS Lisbon Humberto Delgado
JACLIS
Jackson Hole
Tue 11/17
7:25 am-8:00 am
2 stops17h 35m
Lisbon Humberto Delgado
Wed 11/25
5:30 am-4:23 pm
2 stops17h 53m
$602
Quickest round-trip
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Fri 9/25
3:28 pm-5:50 pm
2 stops19h 22m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$604
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Sun 11/15
7:00 am-11:25 am
2 stops20h 25m
Lisbon Humberto Delgado
Wed 2/10
5:30 am-6:48 pm
2 stops21h 18m
$607
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Sat 11/21
7:00 am-2:40 pm
2 stops23h 40m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$608
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Tue 11/3
9:53 am-5:30 pm
2 stops23h 37m
Lisbon Humberto Delgado
Tue 11/10
5:30 am-4:08 pm
2 stops18h 38m
$616
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Fri 9/25
5:59 pm-9:35 am
3 stops32h 36m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$636
JacksonLisbon
JAC Jackson Hole - LIS Lisbon Humberto Delgado
JACLIS
Jackson Hole
Fri 1/22
7:00 am-8:10 am
2 stops18h 10m
Lisbon Humberto Delgado
Tue 1/26
10:15 am-10:03 am
2 stops30h 48m
$736
Showing 1-10 of 24 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.
GEG-LIS
BOI-LIS
JAC-LIS
GEG-FAO
Estimated round-trip price
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Cheapflights Insights
Everything you need to know about your flight from Idaho to Portugal
USID-PT0
GEG-LIS
BOI-LIS
JAC-LIS
GEG-FAO
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Idaho and Portugal flights
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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 7,457,451 searches. Data last updated September 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$549 | Average$827 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$737 | Average$1,050 | FlexibilityNo cancel fee | On-time69% |