$328+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Nov 17 — Nov 241
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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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 October 18, 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 October 18, 2026.
This Delta deal was found by Cheapflights users on 10/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/75:15 am -
2 stops19h 45m
Thu 12/1710:00 am -
2 stops20h 52m
Deal found 10/15![Delta logo]()
$730
This Air France deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:19 pm -
2 stops25h 41m
Thu 11/195:00 am -
2 stops19h 55m
Deal found 10/13![Multiple Airlines logo]()
$784
This United Airlines deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/115:00 am -
2 stops18h 55m
Wed 11/1811:20 am -
2 stops41h 12m
Deal found 10/13![United Airlines logo]()
$787
This Air France deal was found by Cheapflights users on 10/17. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/241:19 pm -
2 stops18h 51m
Tue 12/83:35 pm -
2 stops32h 41m
Deal found 10/17![Multiple Airlines logo]()
$792
This United Airlines deal was found by Cheapflights users on 10/16. 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.
Tue 11/105:00 am -
2 stops21h 30m
Thu 11/196:00 am -
2 stops19h 03m
Deal found 10/16![United Airlines logo]()
$833
This Air France deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:19 pm -
2 stops25h 41m
Tue 11/174:10 pm -
2 stops30h 55m
Deal found 10/14![Multiple Airlines logo]()
$834
This Delta deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2710:37 am -
2 stops21h 33m
Fri 12/45:00 am -
2 stops24h 24m
Deal found 10/13![Delta logo]()
$842
This United Airlines deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:20 am -
2 stops21h 00m
Fri 11/206:00 am -
2 stops23h 59m
Deal found 10/14![United Airlines logo]()
$843
This Air France deal was found by Cheapflights users on 10/17. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/21:05 pm -
2 stops21h 25m
Mon 11/96:30 pm -
2 stops30h 47m
Deal found 10/17![Air France logo]()
$849
This American Airlines deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/131:24 pm -
2 stops18h 31m
Fri 11/2011:05 am -
2 stops19h 54m
Deal found 10/14![American Airlines logo]()
$851
This Air Canada deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/278:28 am -
3 stops17h 52m
Fri 12/411:20 am -
2 stops30h 48m
Deal found 10/13![Multiple Airlines logo]()
$864
This Delta deal was found by Cheapflights users on 10/18. 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.
Thu 11/51:06 pm -
2 stops21h 24m
Thu 11/125:00 am -
2 stops20h 38m
Deal found 10/18![Delta logo]()
$892
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 October 18, 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 October 18, 2026.
This KLM deal was found by Cheapflights users on 10/15. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/111:30 am -
2 stops20h 55m
Mon 2/1511:15 am -
2 stops35h 45m
Deal found 10/15![KLM logo]()
$720
This United deal was found by Cheapflights users on 10/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/110:40 am -
2 stops21h 45m
Mon 2/156:00 am -
3 stops63h 56m
Deal found 10/15![Multiple Airlines logo]()
$772
This United Airlines deal was found by Cheapflights users on 10/16. 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 2/110:40 am -
2 stops21h 45m
Mon 2/2212:30 pm -
3 stops57h 26m
Deal found 10/16![United Airlines logo]()
$773
This Delta deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2710:37 am -
2 stops21h 33m
Fri 12/45:00 am -
2 stops24h 24m
Deal found 10/13![Delta logo]()
$842
This Air France deal was found by Cheapflights users on 10/17. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/21:05 pm -
2 stops21h 25m
Mon 11/96:30 pm -
2 stops30h 47m
Deal found 10/17![Air France logo]()
$849
This Air France deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:19 pm -
2 stops25h 41m
Thu 11/195:00 am -
2 stops19h 55m
Deal found 10/13![Multiple Airlines logo]()
$784
This United Airlines deal was found by Cheapflights users on 10/17. 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.
Tue 11/105:00 am -
2 stops21h 30m
Thu 11/196:00 am -
2 stops19h 03m
Deal found 10/17![United Airlines logo]()
$833
This Delta deal was found by Cheapflights users on 10/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/51:06 pm -
2 stops21h 24m
Thu 11/125:00 am -
2 stops20h 38m
Deal found 10/15![Delta logo]()
$892
This Air France deal was found by Cheapflights users on 10/17. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:19 pm -
2 stops25h 41m
Tue 11/174:10 pm -
2 stops30h 55m
Deal found 10/17![Multiple Airlines logo]()
$834
This United Airlines deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:20 am -
2 stops21h 00m
Fri 11/206:00 am -
2 stops23h 59m
Deal found 10/14![United Airlines logo]()
$843
This United Airlines deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/24:30 pm -
2 stops32h 40m
Mon 11/95:00 am -
2 stops39h 28m
Deal found 10/14![United Airlines logo]()
$897
This United Airlines deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/287:10 pm -
2 stops57h 35m
Sat 12/512:30 pm -
2 stops41h 29m
Deal found 10/14![United Airlines logo]()
$1,103
This business-class.com deal was found by Cheapflights users on 10/16. 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 business-class.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/308:05 am -
1 stop19h 15m
Sat 1/96:00 am -
2 stops24h 15m
Deal found 10/16![Lufthansa logo]()
$3,470
This United Airlines deal was found by Cheapflights users on 10/17. 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 12/610:40 am -
2 stops14h 30m
Wed 12/911:20 am -
2 stops34h 30m
Deal found 10/17![United Airlines logo]()
$1,189
This Justfly.com deal was found by Cheapflights users on 10/17. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/217:59 pm -
2 stops38h 56m
Mon 12/286:25 pm -
2 stops31h 52m
Deal found 10/17![Multiple Airlines logo]()
$2,191
This BusinessClass deal was found by Cheapflights users on 10/17. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/98:00 am -
2 stops23h 50m
Mon 12/216:00 am -
2 stops19h 07m
Deal found 10/17![Lufthansa logo]()
$3,490
This United Airlines deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/258:28 am -
2 stops16h 42m
Tue 12/812:50 pm -
3 stops31h 49m
Deal found 10/14![United Airlines logo]()
$3,574
This United Airlines deal was found by Cheapflights users on 10/16. 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 11/256:20 am -
2 stops17h 35m
Mon 12/711:20 am -
3 stops33h 19m
Deal found 10/16![United Airlines logo]()
$3,577
This Kiwi.com deal was found by Cheapflights users on 10/16. 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.
Thu 1/147:25 am -
1 stop21h 55m
Sun 1/245:05 pm -
2 stops50h 19m
Deal found 10/16![Multiple Airlines logo]()
$5,329
This United Airlines deal was found by Cheapflights users on 10/17. 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.
Thu 11/195:00 am -
2 stops22h 20m
Tue 12/112:50 pm -
3 stops31h 49m
Deal found 10/17![United Airlines logo]()
$4,149
This Kiwi.com deal was found by Cheapflights users on 10/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/98:30 am -
1 stop20h 00m
Mon 12/219:40 am -
1 stop19h 26m
Deal found 10/17![Multiple Airlines logo]()
$6,718
Last-minute flights from Idaho to PortugalDiscover last-minute flight deals from Idaho to Portugal. Data last updated October 18, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Portugal. Data last updated October 18, 2026 and is based on user searches.
This Air France deal was found by Cheapflights users on 10/17. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/21:05 pm -
2 stops21h 25m
Mon 11/96:30 pm -
2 stops30h 47m
Deal found 10/17![Air France logo]()
$849
This United Airlines deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/24:30 pm -
2 stops32h 40m
Mon 11/95:00 am -
2 stops39h 28m
Deal found 10/14![United Airlines logo]()
$897
This Delta deal was found by Cheapflights users on 10/18. 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.
Thu 11/51:06 pm -
2 stops21h 24m
Thu 11/125:00 am -
2 stops20h 38m
Deal found 10/18![Delta logo]()
$892
This Air France deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:19 pm -
2 stops25h 41m
Thu 11/195:00 am -
2 stops19h 55m
Deal found 10/13![Multiple Airlines logo]()
$784
This United Airlines deal was found by Cheapflights users on 10/16. 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.
Tue 11/105:00 am -
2 stops21h 30m
Thu 11/196:00 am -
2 stops19h 03m
Deal found 10/16![United Airlines logo]()
$833
This United Airlines deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/115:00 am -
2 stops18h 55m
Wed 11/1811:20 am -
2 stops41h 12m
Deal found 10/13![United Airlines logo]()
$787
This Air Canada deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:30 am -
3 stops19h 25m
Wed 11/1811:20 am -
2 stops29h 32m
Deal found 10/13![Multiple Airlines logo]()
$898
This United Airlines deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:20 am -
2 stops21h 00m
Fri 11/206:00 am -
2 stops23h 59m
Deal found 10/14![United Airlines logo]()
$843
This American Airlines deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/131:24 pm -
2 stops18h 31m
Fri 11/2011:05 am -
2 stops19h 54m
Deal found 10/14![American Airlines logo]()
$851
This Air France deal was found by Cheapflights users on 10/17. 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 Air France is selected, and click “Compare selected ” under the list of providers to see comparable flight deals.
Tue 11/241:19 pm -
2 stops18h 51m
Tue 12/83:35 pm -
2 stops32h 41m
Deal found 10/17![Multiple Airlines logo]()
$792
This Delta deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2710:37 am -
2 stops21h 33m
Fri 12/45:00 am -
2 stops24h 24m
Deal found 10/13![Delta logo]()
$842
This Air Canada deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/278:28 am -
3 stops17h 52m
Fri 12/411:20 am -
2 stops30h 48m
Deal found 10/13![Multiple Airlines logo]()
$864
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 October 18, 2026.
Search for one-way flight options from Idaho to Portugal. Find affordable one-way fares based on user searches. Data last updated October 18, 2026.
This British Airways deal was found by Cheapflights users on 10/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/172:00 pm -
2 stops21h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![Multiple Airlines logo]()
$328
This United Airlines deal was found by Cheapflights users on 10/16. 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 3/178:52 pm -
3 stops30h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![United Airlines logo]()
$522
This Delta deal was found by Cheapflights users on 10/17. 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 1/47:15 am -
2 stops17h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/17![Delta logo]()
$583
This United Airlines deal was found by Cheapflights users on 10/16. 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 1/48:05 am -
3 stops41h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![United Airlines logo]()
$613
This Air Canada deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/46:20 am -
3 stops20h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Air Canada logo]()
$632
This KAYAK deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/47:20 pm -
1 stop34h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Multiple Airlines logo]()
$961
This Kiwi.com deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/28:59 pm -
3 stops51h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Multiple Airlines logo]()
$1,847
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 October 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $720 (KLM) |
One-way from | $328 (British Airways) |
Popular in | December |
Cheapest in | April |
Average price | $873 |
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 October 18, 2026.
Use the filters below to find and compare flights from Idaho to Portugal that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Wed 3/17
2:00 pm-5:45 pm
2 stops21h 45m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$328
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Wed 3/17
8:52 pm-8:55 am
3 stops30h 03m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$522
Quickest round-trip
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Mon 1/4
7:15 am-8:00 am
2 stops17h 45m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$583
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Mon 1/4
8:05 am-8:10 am
3 stops41h 05m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$613
BoisePorto
BOI Boise Air Term. Gowen Fld - OPO Porto
BOIOPO
Boise Air Term. Gowen Fld
Mon 2/1
11:30 am-3:25 pm
2 stops20h 55m
Porto
Mon 2/15
11:15 am-4:00 pm
2 stops35h 45m
$720
BoisePorto
BOI Boise Air Term. Gowen Fld - OPO Porto
BOIOPO
Boise Air Term. Gowen Fld
Mon 2/1
10:40 am-3:25 pm
2 stops21h 45m
Porto
Mon 2/15
6:00 am-2:56 pm
3 stops63h 56m
$772
BoisePorto
BOI Boise Air Term. Gowen Fld - OPO Porto
BOIOPO
Boise Air Term. Gowen Fld
Mon 2/1
10:40 am-3:25 pm
2 stops21h 45m
Porto
Mon 2/22
12:30 pm-2:56 pm
3 stops57h 26m
$773
BoisePorto
BOI Boise Air Term. Gowen Fld - OPO Porto
BOIOPO
Boise Air Term. Gowen Fld
Tue 11/10
1:19 pm-10:00 pm
2 stops25h 41m
Porto
Thu 11/19
5:00 am-5:55 pm
2 stops19h 55m
$784
BoisePorto
BOI Boise Air Term. Gowen Fld - OPO Porto
BOIOPO
Boise Air Term. Gowen Fld
Tue 11/10
5:00 am-9:30 am
2 stops21h 30m
Porto
Thu 11/19
6:00 am-6:03 pm
2 stops19h 03m
$833
BoisePorto
BOI Boise Air Term. Gowen Fld - OPO Porto
BOIOPO
Boise Air Term. Gowen Fld
Tue 11/10
1:19 pm-10:00 pm
2 stops25h 41m
Porto
Tue 11/17
4:10 pm-4:05 pm
2 stops30h 55m
$834
Showing 1-10 of 26 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-OPO
BOI-LIS
IDA-LIS
SUN-FAO
Estimated round-trip price
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Everything you need to know about your flight from Idaho to Portugal
USID-PT0
BOI-OPO
BOI-LIS
IDA-LIS
SUN-FAO
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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 October 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$549 | Average$853 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$737 | Average$1,050 | FlexibilityNo cancel fee | On-time69% |