$334+ 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 12/28. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Oct 4 — Oct 111
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 4, 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 4, 2026.
This American Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/21:24 pm -
2 stops18h 31m
Mon 11/168:45 pm -
2 stops24h 06m
Deal found 9/1![American Airlines logo]()
$758
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 -
2 stops43h 03m
Deal found 9/3![United Airlines logo]()
$778
This Delta deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:36 pm -
2 stops19h 14m
Wed 10/215:00 am -
2 stops24h 08m
Deal found 8/30![Delta logo]()
$825
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 10/314:10 pm -
2 stops33h 00m
Sat 11/712:25 pm -
2 stops40h 32m
Deal found 9/2![United Airlines logo]()
$844
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 12/27:00 am -
2 stops21h 35m
Sun 12/61:25 pm -
2 stops40h 50m
Deal found 9/3![United Airlines logo]()
$845
This Air France deal was found by Cheapflights users on 9/1. 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.
Thu 11/121:12 pm -
2 stops26h 13m
Sun 11/1511:30 am -
2 stops35h 53m
Deal found 9/1![Multiple Airlines logo]()
$860
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 11/196:20 am -
2 stops20h 00m
Tue 12/111:20 am -
2 stops41h 23m
Deal found 9/3![United Airlines logo]()
$866
This Priceline deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:49 pm -
2 stops21h 36m
Thu 10/2212:30 pm -
2 stops31h 29m
Deal found 8/31![Iberia logo]()
$888
This United Airlines deal was found by Cheapflights users on 9/1. 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.
Thu 11/197:00 am -
2 stops19h 20m
Sun 11/2210:50 am -
2 stops41h 07m
Deal found 9/1![United Airlines logo]()
$889
This Delta deal was found by Cheapflights users on 9/1. 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 9/305:30 am -
2 stops22h 25m
Wed 10/145:00 am -
2 stops19h 14m
Deal found 9/1![Delta logo]()
$893
This Air Canada deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 10/315:00 am -
2 stops20h 40m
Sat 11/711:20 am -
3 stops33h 28m
Deal found 9/2![Multiple Airlines logo]()
$898
This Delta deal was found by Cheapflights users on 9/1. 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.
Thu 10/1512:08 pm -
2 stops22h 42m
Sat 10/245:35 am -
2 stops18h 39m
Deal found 9/1![Delta logo]()
$942
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 4, 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 4, 2026.
This United Airlines deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/106:25 am -
2 stops18h 45m
Tue 2/1611:20 am -
2 stops43h 39m
Deal found 8/31![United Airlines logo]()
$732
This Air Canada deal was found by Cheapflights users on 8/30. 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.
Wed 2/108:15 am -
3 stops18h 05m
Tue 2/1612:50 pm -
2 stops27h 53m
Deal found 8/30![Multiple Airlines logo]()
$750
This Priceline deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:49 pm -
2 stops21h 36m
Thu 10/2212:30 pm -
2 stops31h 29m
Deal found 8/31![Iberia logo]()
$888
This Delta deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 9/1711:10 am -
2 stops23h 35m
Wed 9/235:00 am -
2 stops20h 09m
Deal found 9/2![Delta logo]()
$1,054
This Cheapflightsfares deal was found by Cheapflights users on 9/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:37 pm -
2 stops19h 28m
Fri 10/238:00 pm -
2 stops33h 25m
Deal found 9/1![British Airways logo]()
$1,260
This United Airlines deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/99:00 am -
2 stops40h 20m
Wed 2/105:00 am -
2 stops20h 53m
Deal found 8/30![United Airlines logo]()
$739
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 1/118:00 am -
2 stops41h 10m
Thu 1/1411:20 am -
2 stops53h 19m
Deal found 9/3![United Airlines logo]()
$748
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 1/221:45 pm -
2 stops59h 25m
Tue 1/2610:15 am -
2 stops17h 47m
Deal found 9/2![United Airlines logo]()
$758
This United Airlines deal was found by Cheapflights users on 9/1. 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 12/295:00 am -
2 stops21h 05m
Fri 1/811:20 am -
2 stops43h 03m
Deal found 9/1![United Airlines logo]()
$778
This Air Canada deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 12/2911:42 pm -
3 stops23h 13m
Fri 1/811:20 am -
2 stops43h 03m
Deal found 9/3![Multiple Airlines logo]()
$1,092
This United Airlines deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:00 am -
2 stops21h 35m
Sun 12/61:25 pm -
2 stops40h 50m
Deal found 8/31![United Airlines logo]()
$845
This United Airlines deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/1912:32 pm -
2 stops36h 38m
Fri 1/2211:20 am -
2 stops32h 43m
Deal found 8/30![United Airlines logo]()
$864
This United Airlines deal was found by Cheapflights users on 9/1. 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.
Thu 11/197:00 am -
2 stops19h 20m
Sun 11/2210:50 am -
2 stops41h 07m
Deal found 9/1![United Airlines logo]()
$889
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 12/195:00 am -
2 stops43h 10m
Thu 12/318:55 am -
2 stops43h 53m
Deal found 9/2![United Airlines logo]()
$1,085
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 10/188:00 am -
2 stops18h 20m
Sun 10/255:00 am -
2 stops38h 25m
Deal found 9/3![United Airlines logo]()
$1,110
This United Airlines deal was found by Cheapflights users on 9/1. 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 10/77:00 am -
2 stops20h 30m
Wed 10/1411:25 am -
2 stops53h 19m
Deal found 9/1![United Airlines logo]()
$1,167
Last-minute flights from Idaho to PortugalDiscover last-minute flight deals from Idaho to Portugal. Data last updated September 4, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Portugal. Data last updated September 4, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 9/1711:10 am -
2 stops23h 35m
Wed 9/235:00 am -
2 stops20h 09m
Deal found 9/2![Delta logo]()
$1,054
This Delta deal was found by Cheapflights users on 9/1. 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 9/305:30 am -
2 stops22h 25m
Wed 10/145:00 am -
2 stops19h 14m
Deal found 9/1![Delta logo]()
$893
This Orbitz deal was found by Cheapflights users on 9/1. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:02 am -
2 stops25h 48m
Fri 10/166:35 am -
2 stops22h 54m
Deal found 9/1![Finnair logo]()
$1,095
This Delta deal was found by Cheapflights users on 9/1. 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 10/45:30 am -
2 stops22h 25m
Fri 10/1610:00 am -
2 stops20h 59m
Deal found 9/1![Delta logo]()
$1,053
This Delta deal was found by Cheapflights users on 9/1. 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 10/63:36 pm -
2 stops19h 14m
Sun 10/115:35 am -
2 stops23h 33m
Deal found 9/1![Delta logo]()
$956
This Delta deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:36 pm -
2 stops19h 14m
Wed 10/215:00 am -
2 stops24h 08m
Deal found 8/30![Delta logo]()
$825
This Air Canada deal was found by Cheapflights users on 8/30. 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.
Wed 10/1410:30 am -
3 stops17h 35m
Wed 10/2111:25 am -
2 stops29h 09m
Deal found 8/30![Multiple Airlines logo]()
$1,102
This Priceline deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:49 pm -
2 stops21h 36m
Thu 10/2212:30 pm -
2 stops31h 29m
Deal found 8/31![Iberia logo]()
$888
This Delta deal was found by Cheapflights users on 9/1. 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.
Thu 10/1512:08 pm -
2 stops22h 42m
Sat 10/245:35 am -
2 stops18h 39m
Deal found 9/1![Delta logo]()
$942
This Mytrip deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:00 am -
2 stops19h 20m
Sun 10/255:00 am -
2 stops22h 57m
Deal found 9/2![Multiple Airlines logo]()
$1,004
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 10/314:10 pm -
2 stops33h 00m
Sat 11/712:25 pm -
2 stops40h 32m
Deal found 9/2![United Airlines logo]()
$844
This Air Canada deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 10/315:00 am -
2 stops20h 40m
Sat 11/711:20 am -
3 stops33h 28m
Deal found 9/2![Multiple Airlines logo]()
$898
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 4, 2026.
Search for one-way flight options from Idaho to Portugal. Find affordable one-way fares based on user searches. Data last updated September 4, 2026.
This United Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 12/2811:42 pm -
2 stops24h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![United Airlines logo]()
$334
This Travelocity deal was found by Cheapflights users on 8/30. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/71:10 pm -
2 stops36h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/30![Air Canada logo]()
$463
This Justfly.com deal was found by Cheapflights users on 8/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/61:10 pm -
2 stops60h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/30![Air Canada logo]()
$484
This Kiwi.com deal was found by Cheapflights users on 8/30. 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 11/65:00 am -
3 stops45h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/30![Multiple Airlines logo]()
$491
This Kiwi.com deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/77:29 pm -
3 stops38h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/30![Multiple Airlines logo]()
$502
This Kiwi.com deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:06 am -
2 stops16h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/30![Multiple Airlines logo]()
$556
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 12/287:51 pm -
3 stops57h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$621
This United Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 stops58h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![United Airlines logo]()
$627
This BusinessClass deal was found by Cheapflights users on 9/1. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/194:27 pm -
2 stops18h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![British Airways logo]()
$11,973
This Kiwi.com deal was found by Cheapflights users on 9/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:47 pm -
3 stops54h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Multiple Airlines logo]()
$19,555
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 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $731 (Air Canada) |
One-way from | $334 (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 4, 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
Mon 12/28
11:42 pm-8:10 am
2 stops24h 28m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$334
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Sat 11/7
1:10 pm-9:20 am
2 stops36h 10m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$463
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Fri 11/6
5:00 am-10:00 am
3 stops45h 00m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$491
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Sat 11/7
7:29 pm-6:05 pm
3 stops38h 36m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$502
Quickest round-trip
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Sat 11/21
6:06 am-6:45 am
2 stops16h 39m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$556
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Mon 12/28
7:51 pm-1:35 pm
3 stops57h 44m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$621
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Sat 11/21
4:10 pm-10:20 am
2 stops58h 10m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$627
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Wed 2/10
6:25 am-8:10 am
2 stops18h 45m
Lisbon Humberto Delgado
Tue 2/16
11:20 am-11:59 pm
2 stops43h 39m
$732
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Sat 1/9
9:00 am-9:20 am
2 stops40h 20m
Lisbon Humberto Delgado
Wed 2/10
5:00 am-5:53 pm
2 stops20h 53m
$739
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Mon 1/11
8:00 am-8:10 am
2 stops41h 10m
Lisbon Humberto Delgado
Thu 1/14
11:20 am-9:39 am
2 stops53h 19m
$748
Showing 1-10 of 25 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
GEG-FAO
JAC-LIS
Estimated round-trip price
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Cheapflights Insights
Everything you need to know about your flight from Idaho to Portugal
USID-PT0
BOI-LIS
GEG-LIS
GEG-FAO
JAC-LIS
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Complete your trip
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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 4, 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 |