$331+ 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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Sep 28 — Oct 51
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 August 29, 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 29, 2026.
This United Airlines deal was found by Cheapflights users on 8/29. 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 12/14:24 pm -
3 stops32h 46m
Tue 12/811:20 am -
2 stops34h 46m
Deal found 8/29![United Airlines logo]()
$727
This Air Canada deal was found by Cheapflights users on 8/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/16:15 am -
3 stops20h 05m
Tue 12/812:50 pm -
3 stops29h 56m
Deal found 8/29![Air Canada logo]()
$762
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 -
3 stops41h 49m
Deal found 8/25![United Airlines logo]()
$767
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 12/106:10 am -
2 stops21h 10m
Wed 12/165:00 am -
2 stops23h 34m
Deal found 8/25![United Airlines logo]()
$780
This Delta deal was found by Cheapflights users on 8/28. 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.
Tue 12/295:00 am -
2 stops19h 00m
Fri 1/85:00 am -
2 stops22h 27m
Deal found 8/28![Delta logo]()
$788
This Justfly.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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.
Tue 12/2911:42 pm -
2 stops25h 13m
Fri 1/811:20 am -
2 stops33h 20m
Deal found 8/25![Air Canada logo]()
$800
This American Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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.
Fri 11/1312:15 pm -
2 stops19h 40m
Mon 11/238:45 pm -
2 stops21h 43m
Deal found 8/25![American Airlines logo]()
$807
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 12/158:15 am -
2 stops41h 40m
Wed 12/3011:20 am -
2 stops41h 23m
Deal found 8/25![United Airlines logo]()
$820
This United Airlines deal was found by Cheapflights users on 8/28. 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 10/135:00 am -
2 stops20h 20m
Thu 10/295:00 am -
2 stops22h 57m
Deal found 8/28![United Airlines logo]()
$824
This United Airlines deal was found by Cheapflights users on 8/28. 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.
Wed 10/145:00 am -
2 stops22h 05m
Thu 10/295:00 am -
2 stops22h 57m
Deal found 8/28![United Airlines logo]()
$829
This United Airlines deal was found by Cheapflights users on 8/28. 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 10/174:08 pm -
2 stops32h 12m
Tue 10/2712:20 pm -
2 stops31h 27m
Deal found 8/28![United Airlines logo]()
$836
This United Airlines deal was found by Cheapflights users on 8/28. 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 10/135:00 am -
2 stops20h 20m
Tue 10/2712:20 pm -
2 stops29h 18m
Deal found 8/28![United Airlines logo]()
$840
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 29, 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 29, 2026.
This United Airlines deal was found by Cheapflights users on 8/29. 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 12/14:24 pm -
3 stops32h 46m
Tue 12/811:20 am -
2 stops34h 46m
Deal found 8/29![United Airlines logo]()
$727
This Justfly.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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.
Tue 12/2911:42 pm -
2 stops25h 13m
Fri 1/811:20 am -
2 stops33h 20m
Deal found 8/25![Air Canada logo]()
$800
This Delta deal was found by Cheapflights users on 8/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2910:43 pm -
2 stops25h 17m
Fri 1/85:30 am -
2 stops21h 18m
Deal found 8/26![Delta logo]()
$859
This KLM deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 10/153:36 pm -
2 stops20h 09m
Sat 10/248:55 am -
2 stops20h 13m
Deal found 8/25![KLM logo]()
$905
This Ovago deal was found by Cheapflights users on 8/29. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/194:25 pm -
2 stops32h 45m
Fri 1/2210:15 am -
1 stop17h 22m
Deal found 8/29![Brussels Airlines logo]()
$1,029
This Expedia deal was found by Cheapflights users on 8/27. 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 10/101:40 pm -
2 stops35h 40m
Sun 10/255:00 am -
2 stops22h 57m
Deal found 8/27![Multiple Airlines logo]()
$1,070
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 1/194:25 pm -
2 stops33h 55m
Fri 1/2211:20 am -
2 stops40h 15m
Deal found 8/25![United Airlines logo]()
$731
This United Airlines deal was found by Cheapflights users on 8/28. 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.
Mon 1/116:25 am -
2 stops18h 45m
Thu 1/1410:15 am -
3 stops35h 48m
Deal found 8/28![United Airlines logo]()
$747
This Delta deal was found by Cheapflights users on 8/28. 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.
Mon 9/289:23 am -
2 stops24h 27m
Tue 10/135:00 am -
2 stops19h 58m
Deal found 8/28![Delta logo]()
$889
This Justfly.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 12/1911:42 pm -
2 stops49h 38m
Thu 12/318:55 am -
2 stops21h 35m
Deal found 8/25![Air Canada logo]()
$934
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 12/106:10 am -
2 stops21h 10m
Wed 12/165:00 am -
2 stops23h 34m
Deal found 8/25![United Airlines logo]()
$780
This Delta deal was found by Cheapflights users on 8/29. 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.
Thu 10/1512:08 pm -
2 stops22h 42m
Sat 10/245:35 am -
2 stops18h 39m
Deal found 8/29![Delta logo]()
$943
This United Airlines deal was found by Cheapflights users on 8/29. 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 12/295:00 am -
2 stops21h 05m
Fri 1/85:00 am -
2 stops25h 23m
Deal found 8/29![United Airlines logo]()
$787
This Air Canada deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 -
3 stops41h 49m
Deal found 8/25![Multiple Airlines logo]()
$1,080
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 12/158:15 am -
2 stops41h 40m
Wed 12/3011:20 am -
2 stops41h 23m
Deal found 8/25![United Airlines logo]()
$820
This Delta deal was found by Cheapflights users on 8/28. 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.
Mon 10/123:30 pm -
2 stops19h 15m
Sun 10/255:00 am -
2 stops25h 50m
Deal found 8/28![Delta logo]()
$1,074
This United Airlines deal was found by Cheapflights users on 8/28. 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.
Wed 10/145:00 am -
2 stops22h 05m
Thu 10/295:00 am -
2 stops22h 57m
Deal found 8/28![United Airlines logo]()
$829
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 11/135:35 pm -
1 stop35h 50m
Mon 11/235:30 pm -
2 stops37h 29m
Deal found 8/25![Multiple Airlines logo]()
$1,346
This United Airlines deal was found by Cheapflights users on 8/28. 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 10/174:08 pm -
2 stops32h 12m
Tue 10/2712:20 pm -
2 stops31h 27m
Deal found 8/28![United Airlines logo]()
$836
This United Airlines deal was found by Cheapflights users on 8/29. 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.
Wed 12/27:00 am -
2 stops21h 35m
Sun 12/61:25 pm -
2 stops40h 50m
Deal found 8/29![United Airlines logo]()
$915
This Condor deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/121:53 pm -
2 stops25h 57m
Mon 11/235:00 am -
2 stops25h 59m
Deal found 8/25![Multiple Airlines logo]()
$1,548
This United Airlines deal was found by Cheapflights users on 8/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:40 pm -
2 stops34h 25m
Wed 9/3011:25 am -
2 stops55h 03m
Deal found 8/26![United Airlines logo]()
$980
Last-minute flights from Idaho to PortugalDiscover last-minute flight deals from Idaho to Portugal. Data last updated August 29, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Portugal. Data last updated August 29, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 8/29. 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.
Tue 9/11:10 pm -
2 stops22h 35m
Mon 9/215:00 am -
2 stops22h 15m
Deal found 8/29![Delta logo]()
$1,205
This KLM deal was found by Cheapflights users on 8/28. 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.
Tue 9/11:10 pm -
2 stops18h 25m
Mon 9/217:45 pm -
2 stops31h 30m
Deal found 8/28![KLM logo]()
$1,383
This United Airlines deal was found by Cheapflights users on 8/27. 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 9/17:00 am -
2 stops18h 20m
Mon 9/2111:25 am -
3 stops37h 24m
Deal found 8/27![United Airlines logo]()
$1,555
This KLM deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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.
Wed 9/26:01 pm -
2 stops17h 44m
Thu 9/103:35 pm -
2 stops32h 15m
Deal found 8/25![KLM logo]()
$1,215
This Expedia deal was found by Cheapflights users on 8/27. 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.
Thu 9/37:48 pm -
2 stops42h 47m
Sun 10/1810:15 pm -
2 stops30h 05m
Deal found 8/27![Multiple Airlines logo]()
$1,462
This United Airlines deal was found by Cheapflights users on 8/29. 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.
Sat 9/127:05 pm -
2 stops30h 15m
Tue 9/1511:25 am -
2 stops37h 33m
Deal found 8/29![United Airlines logo]()
$1,577
This Delta deal was found by Cheapflights users on 8/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2012:17 pm -
2 stops22h 33m
Thu 10/15:00 am -
2 stops19h 19m
Deal found 8/26![Delta logo]()
$990
This American Airlines deal was found by Cheapflights users on 8/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:00 am -
2 stops20h 05m
Wed 9/307:20 am -
2 stops22h 40m
Deal found 8/26![Multiple Airlines logo]()
$1,020
This United Airlines deal was found by Cheapflights users on 8/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:40 pm -
2 stops34h 25m
Wed 9/3011:25 am -
2 stops55h 03m
Deal found 8/26![United Airlines logo]()
$980
This Kiwi.com deal was found by Cheapflights users on 8/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2310:14 am -
1 stop18h 36m
Wed 9/309:40 am -
1 stop19h 47m
Deal found 8/26![Multiple Airlines logo]()
$1,375
This Delta deal was found by Cheapflights users on 8/28. 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.
Mon 9/289:23 am -
2 stops24h 27m
Tue 10/135:00 am -
2 stops19h 58m
Deal found 8/28![Delta logo]()
$889
This Kiwi.com deal was found by Cheapflights users on 8/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/284:21 pm -
1 stop35h 24m
Tue 10/137:05 pm -
2 stops52h 17m
Deal found 8/28![Multiple Airlines logo]()
$1,573
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 29, 2026.
Search for one-way flight options from Idaho to Portugal. Find affordable one-way fares based on user searches. Data last updated August 29, 2026.
This American Airlines deal was found by Cheapflights users on 8/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/33:24 pm -
2 stops19h 21m
Deal found 8/29![American Airlines logo]()
$331
This Air Canada deal was found by Cheapflights users on 8/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/38:15 am -
3 stops18h 05m
Deal found 8/29![Air Canada logo]()
$338
This American Airlines deal was found by Cheapflights users on 8/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/3112:21 pm -
2 stops19h 29m
Deal found 8/27![American Airlines logo]()
$381
This Air Canada deal was found by Cheapflights users on 8/27. 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 12/316:20 am -
3 stops20h 00m
Deal found 8/27![Air Canada logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 8/29. 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 10/127:46 pm -
3 stops40h 49m
Deal found 8/29![Multiple Airlines logo]()
$433
This American Airlines deal was found by Cheapflights users on 8/26. 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 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 8/26![American Airlines logo]()
$460
This Expedia deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 11/71:10 pm -
2 stops36h 10m
Deal found 8/25![Air Canada logo]()
$464
This Kiwi.com deal was found by Cheapflights users on 8/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:03 am -
3 stops32h 27m
Deal found 8/26![Multiple Airlines logo]()
$467
This United Airlines deal was found by Cheapflights users on 8/26. 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 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
Deal found 8/26![United Airlines logo]()
$469
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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.
Sun 11/87:28 pm -
3 stops57h 17m
Deal found 8/25![Multiple Airlines logo]()
$483
This Justfly.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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
Deal found 8/25![Air Canada logo]()
$484
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 11/74:39 pm -
3 stops41h 26m
Deal found 8/25![Multiple Airlines logo]()
$506
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 29, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $727 (United Airlines) |
One-way from | $331 (American 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 7,457,451 searches. Data last updated August 29, 2026.
Use the filters below to find and compare flights from Idaho to Portugal that are best for you.
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Route
Depart
Return
Cheapest round-trip
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Tue 12/1
4:24 pm-8:10 am
3 stops32h 46m
Lisbon Humberto Delgado
Tue 12/8
11:20 am-3:06 pm
2 stops34h 46m
$727
JacksonLisbon
JAC Jackson Hole - LIS Lisbon Humberto Delgado
JACLIS
Jackson Hole
Tue 1/19
4:25 pm-9:20 am
2 stops33h 55m
Lisbon Humberto Delgado
Fri 1/22
11:20 am-8:35 pm
2 stops40h 15m
$731
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Mon 1/11
6:25 am-8:10 am
2 stops18h 45m
Lisbon Humberto Delgado
Thu 1/14
10:15 am-3:03 pm
3 stops35h 48m
$747
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Thu 12/10
6:10 am-10:20 am
2 stops21h 10m
Lisbon Humberto Delgado
Wed 12/16
5:00 am-9:34 pm
2 stops23h 34m
$780
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
5:00 am-10:23 pm
2 stops25h 23m
$787
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Tue 12/29
11:42 pm-8:55 am
2 stops25h 13m
Lisbon Humberto Delgado
Fri 1/8
11:20 am-12:40 pm
2 stops33h 20m
$800
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Tue 12/15
8:15 am-8:55 am
2 stops41h 40m
Lisbon Humberto Delgado
Wed 12/30
11:20 am-9:43 pm
2 stops41h 23m
$820
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Wed 10/14
5:00 am-11:05 am
2 stops22h 05m
Lisbon Humberto Delgado
Thu 10/29
5:00 am-8:57 pm
2 stops22h 57m
$829
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Sat 10/17
4:08 pm-8:20 am
2 stops32h 12m
Lisbon Humberto Delgado
Tue 10/27
12:20 pm-12:47 pm
2 stops31h 27m
$836
SpokaneLisbon
GEG Spokane - LIS Lisbon Humberto Delgado
GEGLIS
Spokane
Tue 12/29
10:43 pm-8:00 am
2 stops25h 17m
Lisbon Humberto Delgado
Fri 1/8
5:30 am-6:48 pm
2 stops21h 18m
$859
Showing 1-10 of 38 resultsSorted by cheapest first
Best time to book a flight from Idaho to Portugal
Have a flexible travel schedule? Discover the best time to fly to Portugal from Idaho with our price prediction graph.
BOI-LIS
GEG-LIS
JAC-LIS
GEG-FAO
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Idaho to Portugal
USID-PT0
BOI-LIS
GEG-LIS
JAC-LIS
GEG-FAO
No data available for this route at this time. Please check back soon.
Related info for your journey
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Alternative routes for Idaho to Portugal
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Complete your trip
Complete your trip to Portugal by adding a car rental and/or hotel reservation to your travel itinerary.
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Idaho and Portugal flights
Browse other Idaho and Portugal flight options. Last updated on August 29, 2026.
Popular flight searches
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Idaho to Portugal flights
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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 7,457,451 searches. Data last updated August 29, 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 |