$389+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
May 19 — May 261
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 April 19, 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 April 19, 2026.
This American Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/41:14 pm
GEG
- LIS
2 stops20h 26m
American Airlines
Wed 11/116:30 am
LIS
- GEG
2 stops22h 25m
American Airlines
Deal found 4/15![American Airlines logo]()
$717
This United Airlines deal was found by Cheapflights users on 4/17. 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 12/295:00 am
GEG
- LIS
2 stops19h 10m
United Airlines
Fri 1/85:00 am
LIS
- GEG
2 stops24h 09m
United Airlines
Deal found 4/17![United Airlines logo]()
$721
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Fri 10/302:40 pm
JAC
- LIS
2 stops38h 20m
United Airlines
Sat 11/75:00 am
LIS
- JAC
2 stops39h 29m
United Airlines
Deal found 4/17![United Airlines logo]()
$724
This KLM deal was found by Cheapflights users on 4/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/301:10 pm
JAC
- LIS
2 stops28h 00m
KLM
Sat 11/711:25 am
LIS
- JAC
2 stops36h 04m
KLM
Deal found 4/16![KLM logo]()
$726
This United Airlines deal was found by Cheapflights users on 4/16. 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 12/77:00 am
JAC
- LIS
2 stops20h 15m
United Airlines
Fri 12/111:00 pm
LIS
- JAC
2 stops39h 02m
United Airlines
Deal found 4/16![United Airlines logo]()
$728
This Air France deal was found by Cheapflights users on 4/17. 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.
Sun 11/15:40 am
BOI
- LIS
2 stops20h 20m
Air France
Sun 11/85:30 am
LIS
- BOI
2 stops21h 47m
Air France
Deal found 4/17![Air France logo]()
$729
This United Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/155:00 am
BOI
- LIS
2 stops20h 10m
United Airlines
Thu 11/1910:15 am
LIS
- BOI
2 stops19h 50m
United Airlines
Deal found 4/15![United Airlines logo]()
$743
This American Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/301:40 pm
JAC
- LIS
2 stops19h 10m
American Airlines
Sat 11/711:05 am
LIS
- JAC
2 stops32h 09m
American Airlines
Deal found 4/15![American Airlines logo]()
$748
This Air France deal was found by Cheapflights users on 4/15. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:15 pm
BOI
- LIS
2 stops18h 40m
Multiple Airlines
Fri 10/3011:25 am
LIS
- BOI
2 stops18h 30m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$784
This United Airlines deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/45:00 am
GEG
- LIS
3 stops19h 10m
United Airlines
Wed 11/1110:15 am
LIS
- GEG
2 stops18h 54m
United Airlines
Deal found 4/18![United Airlines logo]()
$813
This Delta deal was found by Cheapflights users on 4/15. 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.
Wed 4/225:40 am
BOI
- LIS
2 stops19h 20m
Delta
Wed 5/135:00 am
LIS
- BOI
2 stops22h 34m
Delta
Deal found 4/15![Delta logo]()
$833
This Booking.com deal was found by Cheapflights users on 4/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:00 am
BOI
- LIS
2 stops47h 05m
Air Canada
Thu 10/2211:25 am
LIS
- BOI
2 stops33h 05m
Air Canada
Deal found 4/16![Air Canada logo]()
$839
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 April 19, 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 April 19, 2026.
This Air France deal was found by Cheapflights users on 4/17. 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.
Thu 10/1510:38 am
BOI
- LIS
2 stops17h 37m
Multiple Airlines
Sat 10/245:00 am
LIS
- BOI
2 stops22h 17m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$844
This Travelocity deal was found by Cheapflights users on 4/14. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/152:55 pm
BOI
- LIS
2 stops22h 10m
Iberia
Sat 10/248:25 am
LIS
- BOI
2 stops34h 01m
Iberia
Deal found 4/14![Iberia logo]()
$857
This United Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/247:00 am
GEG
- LIS
2 stops19h 30m
United Airlines
Sat 5/911:25 am
LIS
- GEG
2 stops39h 11m
United Airlines
Deal found 4/15![United Airlines logo]()
$877
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/123:14 pm
BOI
- LIS
2 stops19h 36m
Delta
Tue 5/195:00 am
LIS
- BOI
2 stops24h 58m
Delta
Deal found 4/16![Delta logo]()
$881
This KLM deal was found by Cheapflights users on 4/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2011:05 am
GEG
- LIS
2 stops19h 30m
KLM
Tue 5/265:00 am
LIS
- GEG
2 stops19h 57m
KLM
Deal found 4/16![KLM logo]()
$1,018
This lol.travel deal was found by Cheapflights users on 4/17. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/31:29 pm
BOI
- LIS
2 stops26h 56m
Finnair
Thu 5/76:35 am
LIS
- BOI
2 stops23h 19m
Finnair
Deal found 4/17![Finnair logo]()
$1,081
This KAYAK deal was found by Cheapflights users on 4/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/277:00 am
JAC
- LIS
2 stops21h 00m
Lufthansa
Tue 8/410:25 am
LIS
- JAC
1 stop17h 36m
Lufthansa
Deal found 4/16![Lufthansa logo]()
$1,217
This KLM deal was found by Cheapflights users on 4/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:10 pm
GEG
- LIS
2 stops17h 35m
Multiple Airlines
Sat 5/99:50 am
LIS
- GEG
2 stops21h 16m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$899
This United Airlines deal was found by Cheapflights users on 4/17. 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 9/156:30 am
BOI
- LIS
2 stops21h 00m
United Airlines
Thu 9/2411:25 am
LIS
- BOI
2 stops43h 27m
United Airlines
Deal found 4/17![United Airlines logo]()
$931
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/78:42 am
BOI
- LIS
2 stops19h 33m
Delta
Wed 6/245:00 am
LIS
- BOI
2 stops24h 28m
Delta
Deal found 4/14![Delta logo]()
$1,036
This Delta deal was found by Cheapflights users on 4/18. 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.
Mon 6/86:43 am
BOI
- LIS
2 stops21h 32m
Delta
Fri 6/265:00 am
LIS
- BOI
2 stops19h 28m
Delta
Deal found 4/18![Delta logo]()
$1,037
This United Airlines deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/22:30 pm
JAC
- LIS
2 stops35h 50m
United Airlines
Thu 9/1011:25 am
LIS
- JAC
2 stops38h 27m
United Airlines
Deal found 4/18![United Airlines logo]()
$1,046
This KAYAK deal was found by Cheapflights users on 4/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/204:15 pm
JAC
- LIS
2 stops23h 30m
Lufthansa
Wed 5/276:45 am
LIS
- JAC
2 stops21h 13m
Lufthansa
Deal found 4/15![Lufthansa logo]()
$1,235
This United Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/287:00 am
JAC
- LIS
2 stops19h 20m
United Airlines
Mon 8/31:00 pm
LIS
- JAC
3 stops31h 48m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,067
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/108:42 am
BOI
- LIS
2 stops26h 08m
Delta
Fri 6/265:00 am
LIS
- BOI
2 stops25h 55m
Delta
Deal found 4/14![Delta logo]()
$1,088
This United Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/274:23 pm
JAC
- LIS
2 stops35h 42m
United Airlines
Mon 8/31:00 pm
LIS
- JAC
3 stops31h 48m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,078
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/53:14 pm
BOI
- LIS
2 stops19h 36m
Delta
Tue 6/235:00 am
LIS
- BOI
2 stops24h 28m
Delta
Deal found 4/14![Delta logo]()
$1,106
This United Airlines deal was found by Cheapflights users on 4/17. 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 5/76:00 am
GEG
- LIS
2 stops23h 40m
United Airlines
Thu 5/2811:25 am
LIS
- GEG
3 stops33h 12m
United Airlines
Deal found 4/17![United Airlines logo]()
$1,079
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/53:14 pm
BOI
- LIS
2 stops19h 36m
Delta
Wed 6/245:00 am
LIS
- BOI
2 stops24h 28m
Delta
Deal found 4/14![Delta logo]()
$1,106
This Rumbo deal was found by Cheapflights users on 4/14. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/2312:51 pm
GEG
- LIS
2 stops47h 14m
Multiple Airlines
Tue 6/301:40 pm
LIS
- GEG
2 stops42h 19m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$1,537
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1110:36 am
BOI
- LIS
2 stops20h 59m
Delta
Wed 6/245:00 am
LIS
- BOI
2 stops24h 28m
Delta
Deal found 4/14![Delta logo]()
$1,111
This United Airlines deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/144:25 pm
JAC
- LIS
2 stops35h 40m
United Airlines
Sat 10/105:05 am
LIS
- JAC
2 stops19h 47m
United Airlines
Deal found 4/18![United Airlines logo]()
$1,128
This Delta deal was found by Cheapflights users on 4/18. 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.
Wed 5/2011:05 am
GEG
- LIS
2 stops19h 30m
Delta
Tue 5/265:00 am
LIS
- GEG
2 stops18h 31m
Delta
Deal found 4/18![Delta logo]()
$1,163
This United Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/282:44 pm
JAC
- LIS
3 stops35h 36m
United Airlines
Tue 8/41:00 pm
LIS
- JAC
2 stops36h 42m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,192
This Delta deal was found by Cheapflights users on 4/15. 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 7/96:20 am
GEG
- LIS
2 stops20h 55m
Delta
Sun 7/125:00 am
LIS
- GEG
2 stops18h 44m
Delta
Deal found 4/15![Delta logo]()
$1,207
This United Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/117:30 am
JAC
- LIS
2 stops20h 35m
United Airlines
Tue 6/2311:25 am
LIS
- JAC
2 stops31h 10m
United Airlines
Deal found 4/15![United Airlines logo]()
$1,301
This United Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/221:41 pm
GEG
- LIS
2 stops23h 54m
United Airlines
Tue 6/3011:25 am
LIS
- GEG
2 stops43h 05m
United Airlines
Deal found 4/15![United Airlines logo]()
$1,319
This United Airlines deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/196:00 am
GEG
- LIS
2 stops45h 05m
United Airlines
Tue 6/301:00 pm
LIS
- GEG
2 stops41h 30m
United Airlines
Deal found 4/18![United Airlines logo]()
$1,371
This United Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/304:08 pm
GEG
- FAO
2 stops33h 47m
United Airlines
Sat 6/63:35 pm
FAO
- GEG
2 stops35h 04m
United Airlines
Deal found 4/15![United Airlines logo]()
$1,479
This United Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/205:00 am
GEG
- LIS
2 stops22h 05m
United Airlines
Tue 5/2611:25 am
LIS
- GEG
3 stops57h 12m
United Airlines
Deal found 4/15![United Airlines logo]()
$1,646
Last-minute flights from Idaho to PortugalDiscover last-minute flight deals from Idaho to Portugal. Data last updated April 19, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Portugal. Data last updated April 19, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 4/15. 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.
Wed 4/225:40 am
BOI
- LIS
2 stops19h 20m
Delta
Wed 5/135:00 am
LIS
- BOI
2 stops22h 34m
Delta
Deal found 4/15![Delta logo]()
$833
This United Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/247:00 am
GEG
- LIS
2 stops19h 30m
United Airlines
Sat 5/911:25 am
LIS
- GEG
2 stops39h 11m
United Airlines
Deal found 4/15![United Airlines logo]()
$877
This KLM deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/243:30 pm
GEG
- LIS
2 stops19h 15m
KLM
Sat 5/95:00 am
LIS
- GEG
2 stops18h 31m
KLM
Deal found 4/18![KLM logo]()
$891
This KLM deal was found by Cheapflights users on 4/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:10 pm
GEG
- LIS
2 stops17h 35m
Multiple Airlines
Sat 5/99:50 am
LIS
- GEG
2 stops21h 16m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$899
This lol.travel deal was found by Cheapflights users on 4/17. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/31:29 pm
BOI
- LIS
2 stops26h 56m
Finnair
Thu 5/76:35 am
LIS
- BOI
2 stops23h 19m
Finnair
Deal found 4/17![Finnair logo]()
$1,081
This Delta deal was found by Cheapflights users on 4/17. 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.
Thu 5/711:05 am
GEG
- LIS
2 stops22h 45m
Delta
Thu 5/285:00 am
LIS
- GEG
2 stops18h 58m
Delta
Deal found 4/17![Delta logo]()
$962
This United Airlines deal was found by Cheapflights users on 4/17. 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 5/76:00 am
GEG
- LIS
2 stops23h 40m
United Airlines
Thu 5/2811:25 am
LIS
- GEG
3 stops33h 12m
United Airlines
Deal found 4/17![United Airlines logo]()
$1,079
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/123:14 pm
BOI
- LIS
2 stops19h 36m
Delta
Tue 5/195:00 am
LIS
- BOI
2 stops24h 58m
Delta
Deal found 4/16![Delta logo]()
$881
This Ovago deal was found by Cheapflights users on 4/18. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:38 pm
GEG
- LIS
2 stops45h 27m
British Airways
Sat 5/237:10 am
LIS
- GEG
2 stops45h 34m
British Airways
Deal found 4/18![British Airways logo]()
$1,189
This Delta deal was found by Cheapflights users on 4/15. 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.
Wed 5/2011:05 am
GEG
- LIS
2 stops23h 40m
Delta
Tue 5/265:00 am
LIS
- GEG
2 stops25h 51m
Delta
Deal found 4/15![Delta logo]()
$1,018
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3012:15 pm
BOI
- LIS
2 stops22h 35m
Delta
Sat 6/65:00 am
LIS
- BOI
2 stops22h 32m
Delta
Deal found 4/14![Delta logo]()
$1,176
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/318:56 am
BOI
- LIS
2 stops19h 19m
Delta
Sun 6/75:35 am
LIS
- BOI
2 stops20h 38m
Delta
Deal found 4/16![Delta logo]()
$1,114
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 April 19, 2026.
Search for one-way flight options from Idaho to Portugal. Find affordable one-way fares based on user searches. Data last updated April 19, 2026.
This Air France deal was found by Cheapflights users on 4/14. 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.
Thu 10/1510:38 am
BOI
- LIS
2 stops17h 37m
Air France
Deal found 4/14![Air France logo]()
$389
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:55 pm
BOI
- LIS
3 stops39h 45m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$514
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:35 am
BOI
- LIS
3 stops44h 40m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$559
This Air Canada deal was found by Cheapflights users on 4/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/161:41 pm
GEG
- LIS
2 stops37h 24m
Air Canada
Deal found 4/15![Air Canada logo]()
$652
This United Airlines deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/164:03 pm
GEG
- LIS
2 stops58h 57m
United Airlines
Deal found 4/18![United Airlines logo]()
$661
This Justfly.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:46 pm
BOI
- LIS
2 stops34h 19m
Air Canada
Deal found 4/19![Air Canada logo]()
$751
This United Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/34:18 pm
GEG
- LIS
2 stops58h 47m
United Airlines
Deal found 4/19![United Airlines logo]()
$752
This Air France deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:20 am
BOI
- LIS
2 stops19h 40m
Air France
Deal found 4/16![Air France logo]()
$781
This Air Canada deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/288:25 am
BOI
- LIS
3 stops17h 55m
Air Canada
Deal found 4/19![Air Canada logo]()
$785
This Air Canada deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/37:00 am
GEG
- LIS
3 stops19h 50m
Air Canada
Deal found 4/19![Air Canada logo]()
$1,075
This Justfly.com deal was found by Cheapflights users on 4/15. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/161:50 pm
GEG
- LIS
1 stop17h 00m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$1,134
This Justfly.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/311:51 am
GEG
- LIS
1 stop15h 54m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$1,237
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 April 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $833 (Air France) |
One-way from | $389 (Air France) |
Popular in | December |
Cheapest in | February |
Average price | $663 |
Cheapflights Fare Finder
Customize your flight search to find flights from Idaho to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 19, 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 - LIS
BOILIS
Boise Air Term. Gowen Fld
Thu 10/15
10:38 am-11:15 am
2 stops17h 37m
Lisbon Humberto Delgado
Sat 10/24
5:00 am-8:17 pm
2 stops22h 17m
$844
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Thu 10/15
2:55 pm-8:05 pm
2 stops22h 10m
Lisbon Humberto Delgado
Sat 10/24
8:25 am-11:26 am
2 stops34h 01m
$857
SpokaneLisbon
GEG - LIS
GEGLIS
Spokane
Fri 4/24
7:00 am-10:30 am
2 stops19h 30m
Lisbon Humberto Delgado
Sat 5/9
11:25 am-6:36 pm
2 stops39h 11m
$877
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 5/12
3:14 pm-5:50 pm
2 stops19h 36m
Lisbon Humberto Delgado
Tue 5/19
5:00 am-10:58 pm
2 stops24h 58m
$881
SpokaneLisbon
GEG - LIS
GEGLIS
Spokane
Fri 4/24
5:10 pm-6:45 pm
2 stops17h 35m
Lisbon Humberto Delgado
Sat 5/9
9:50 am-11:06 pm
2 stops21h 16m
$899
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 9/15
6:30 am-10:30 am
2 stops21h 00m
Lisbon Humberto Delgado
Thu 9/24
11:25 am-11:52 pm
2 stops43h 27m
$931
SpokaneLisbon
GEG - LIS
GEGLIS
Spokane
Wed 5/20
11:05 am-2:35 pm
2 stops19h 30m
Lisbon Humberto Delgado
Tue 5/26
5:00 am-4:57 pm
2 stops19h 57m
$1,018
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Sun 6/7
8:42 am-11:15 am
2 stops19h 33m
Lisbon Humberto Delgado
Wed 6/24
5:00 am-10:28 pm
2 stops24h 28m
$1,036
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Mon 6/8
6:43 am-11:15 am
2 stops21h 32m
Lisbon Humberto Delgado
Fri 6/26
5:00 am-5:28 pm
2 stops19h 28m
$1,037
JacksonLisbon
JAC - LIS
JACLIS
Jackson Hole
Wed 9/2
2:30 pm-9:20 am
2 stops35h 50m
Lisbon Humberto Delgado
Thu 9/10
11:25 am-6:52 pm
2 stops38h 27m
$1,046
Showing 1-10 of 42 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
Find useful and relevant information for your journey from Idaho to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Idaho to Portugal
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Portugal by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Idaho to Portugal by cabin class
Find flights from Idaho to Portugal, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Idaho and Portugal flights
Browse other Idaho and Portugal flight options. Last updated on April 19, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Idaho to Portugal flights
Consider these flights traveling from Idaho to Portugal.
Fly to Portugal regions
Consider these flights traveling to Portugal regions.
Top 2 airlines flying from Idaho to Portugal
Discover the top 2 airlines that operate flights from Idaho to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$549 | Average$827 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$618 | Average$982 | FlexibilityNo cancel fee | On-time69% |