$497+ Cheap flights from Boise (BOI) 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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
May 23 — May 301
Round-trip
1 adult, Economy
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Find cheap flights from Boise to Portugal with Cheapflights
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Cheapest flights from Boise to PortugalExplore the most affordable flight options available from Boise to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 23, 2026.
Explore the most affordable flight options available from Boise to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 23, 2026.
This Expedia deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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.
Sun 10/186:44 am
BOI
- LIS
2 stops26h 06m
Finnair
Tue 11/34:10 pm
LIS
- BOI
2 stops36h 53m
Finnair
Deal found 4/22![Finnair logo]()
$725
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/185:40 am
BOI
- LIS
2 stops25h 55m
Delta
Tue 11/35:00 am
LIS
- BOI
2 stops25h 55m
Delta
Deal found 4/22![Delta logo]()
$726
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/182:35 pm
BOI
- LIS
2 stops20h 15m
Delta
Mon 11/25:30 am
LIS
- BOI
2 stops25h 22m
Delta
Deal found 4/22![Delta logo]()
$729
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1811:30 pm
BOI
- LIS
2 stops25h 30m
Delta
Sun 11/111:15 am
LIS
- BOI
2 stops19h 40m
Delta
Deal found 4/22![Delta logo]()
$732
This United Airlines deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 10/196:25 am
BOI
- LIS
2 stops19h 55m
United Airlines
Wed 10/281:00 pm
LIS
- BOI
2 stops34h 55m
United Airlines
Deal found 4/22![United Airlines logo]()
$783
This Air France deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 10/201:15 pm
BOI
- LIS
2 stops18h 40m
Multiple Airlines
Fri 10/3011:25 am
LIS
- BOI
2 stops18h 30m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$784
This United Airlines deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 10/196:25 am
BOI
- LIS
2 stops19h 55m
United Airlines
Thu 10/295:00 am
LIS
- BOI
2 stops22h 15m
United Airlines
Deal found 4/22![United Airlines logo]()
$787
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/185:40 am
BOI
- LIS
2 stops25h 55m
Delta
Wed 10/2811:25 am
LIS
- BOI
2 stops18h 30m
Delta
Deal found 4/22![Delta logo]()
$789
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/188:40 am
BOI
- LIS
2 stops19h 35m
Delta
Thu 10/295:30 am
LIS
- BOI
2 stops19h 03m
Delta
Deal found 4/22![Delta logo]()
$791
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 10/245:45 pm
BOI
- LIS
2 stops33h 15m
Delta
Wed 10/2811:15 am
LIS
- BOI
2 stops18h 49m
Delta
Deal found 4/22![Delta logo]()
$810
This Air Canada deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:44 pm
BOI
- LIS
2 stops35h 16m
Air Canada
Fri 10/3011:20 am
LIS
- BOI
2 stops28h 23m
Air Canada
Deal found 4/22![Air Canada logo]()
$812
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/188:40 am
BOI
- LIS
2 stops19h 35m
Delta
Sat 10/3112:20 pm
LIS
- BOI
2 stops38h 57m
Delta
Deal found 4/22![Delta logo]()
$817
Best flights from Boise to PortugalDiscover carefully curated flight deals from Boise to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 23, 2026.
Discover carefully curated flight deals from Boise to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 23, 2026.
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/185:40 am
BOI
- LIS
2 stops25h 55m
Delta
Tue 11/35:00 am
LIS
- BOI
2 stops25h 55m
Delta
Deal found 4/22![Delta logo]()
$726
This United Airlines deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 10/196:25 am
BOI
- LIS
2 stops19h 55m
United Airlines
Wed 10/281:00 pm
LIS
- BOI
2 stops34h 55m
United Airlines
Deal found 4/22![United Airlines logo]()
$783
This KLM deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 5/1212:15 pm
BOI
- LIS
2 stops19h 20m
KLM
Tue 5/199:20 am
LIS
- BOI
2 stops18h 14m
KLM
Deal found 4/22![KLM logo]()
$885
This British Airways deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/62:57 pm
BOI
- LIS
2 stops17h 38m
Multiple Airlines
Sun 10/186:50 pm
LIS
- BOI
2 stops34h 27m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$988
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 10/195:40 am
BOI
- LIS
2 stops19h 20m
Delta
Sun 11/111:15 am
LIS
- BOI
2 stops19h 40m
Delta
Deal found 4/22![Delta logo]()
$732
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 10/194:05 pm
BOI
- LIS
2 stops18h 45m
Delta
Sat 10/3112:20 pm
LIS
- BOI
2 stops38h 57m
Delta
Deal found 4/22![Delta logo]()
$817
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 9/157:05 am
BOI
- LIS
2 stops20h 25m
United Airlines
Thu 9/2411:25 am
LIS
- BOI
2 stops43h 27m
United Airlines
Deal found 4/19![United Airlines logo]()
$931
This Air France 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/83:30 pm
BOI
- LIS
2 stops19h 20m
Multiple Airlines
Sat 9/198:55 am
LIS
- BOI
2 stops18h 23m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$1,001
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/62:35 pm
BOI
- LIS
2 stops20h 15m
Delta
Tue 10/205:00 am
LIS
- BOI
2 stops22h 17m
Delta
Deal found 4/19![Delta logo]()
$845
This United Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:03 am
BOI
- LIS
3 stops43h 17m
United Airlines
Sat 10/1711:25 am
LIS
- BOI
2 stops33h 39m
United Airlines
Deal found 4/20![United Airlines logo]()
$1,130
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/83:31 pm
BOI
- LIS
2 stops19h 19m
Delta
Fri 6/265:00 am
LIS
- BOI
2 stops21h 13m
Delta
Deal found 4/20![Delta logo]()
$1,037
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” 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 7/116:00 am
BOI
- LIS
2 stops19h 00m
Delta
Sat 7/2510:00 am
LIS
- BOI
2 stops20h 01m
Delta
Deal found 4/21![Delta logo]()
$1,218
Last-minute flights from Boise to PortugalDiscover last-minute flight deals from Boise to Portugal. Data last updated April 23, 2026 and is based on user searches.
Discover last-minute flight deals from Boise to Portugal. Data last updated April 23, 2026 and is based on user searches.
This Lufthansa 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2210:35 am
BOI
- LIS
2 stops20h 05m
Lufthansa
Fri 4/246:15 am
LIS
- BOI
2 stops18h 50m
Lufthansa
Deal found 4/18![Lufthansa logo]()
$1,262
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 4/2210:35 am
BOI
- LIS
2 stops29h 10m
United Airlines
Fri 4/241:00 pm
LIS
- BOI
3 stops37h 53m
United Airlines
Deal found 4/18![United Airlines logo]()
$1,527
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/226:08 pm
BOI
- LIS
2 stops22h 07m
Multiple Airlines
Fri 4/2412:20 pm
LIS
- BOI
1 stop17h 07m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$1,940
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 4/278:40 pm
BOI
- LIS
2 stops28h 20m
Delta
Mon 5/115:00 am
LIS
- BOI
2 stops19h 50m
Delta
Deal found 4/22![Delta logo]()
$880
This KLM deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 5/1212:15 pm
BOI
- LIS
2 stops19h 20m
KLM
Tue 5/199:20 am
LIS
- BOI
2 stops18h 14m
KLM
Deal found 4/22![KLM logo]()
$885
This Air Canada deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 5/128:02 am
BOI
- LIS
2 stops18h 18m
Multiple Airlines
Tue 5/1911:25 am
LIS
- BOI
3 stops29h 29m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$1,457
This Air Canada deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 5/1210:35 am
BOI
- LIS
3 stops17h 30m
Air Canada
Tue 5/1911:25 am
LIS
- BOI
3 stops29h 29m
Air Canada
Deal found 4/22![Air Canada logo]()
$1,767
This SmartFares deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2111:56 am
BOI
- LIS
2 stops20h 29m
Multiple Airlines
Thu 5/286:15 am
LIS
- BOI
2 stops22h 20m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$1,501
This KAYAK deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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.
Sat 5/235:46 pm
BOI
- LIS
2 stops31h 34m
Multiple Airlines
Sat 6/65:05 am
LIS
- BOI
2 stops23h 35m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$1,359
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/261:59 pm
BOI
- LIS
2 stops25h 16m
Multiple Airlines
Sat 6/65:05 am
LIS
- BOI
2 stops25h 53m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$2,039
One-way flights from Boise to PortugalSearch for one-way flight options from Boise to Portugal. Find affordable one-way fares based on user searches. Data last updated April 23, 2026.
Search for one-way flight options from Boise to Portugal. Find affordable one-way fares based on user searches. Data last updated April 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 9/61:04 pm
BOI
- LIS
3 stops26h 21m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$497
This Ovago deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 9/57:48 pm
BOI
- LIS
2 stops20h 22m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$499
This Kiwi.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/44:25 pm
BOI
- LIS
3 stops34h 10m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$580
This Kiwi.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” 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 6/68:58 am
BOI
- LIS
3 stops29h 57m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$615
This Air Canada deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/286:30 am
BOI
- LIS
2 stops45h 30m
Air Canada
Deal found 4/20![Air Canada logo]()
$738
This United Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/22:40 pm
BOI
- LIS
2 stops37h 25m
United Airlines
Deal found 4/20![United Airlines logo]()
$751
This Air France deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” 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 6/2810:29 am
BOI
- LIS
2 stops17h 16m
Air France
Deal found 4/21![Air France logo]()
$781
This Air France deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” 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 6/22:23 pm
BOI
- LIS
2 stops20h 27m
Air France
Deal found 4/21![Air France logo]()
$786
Find flight deals from Boise to Portugal
Keep the following information in mind while searching for Boise to Portugal flight deals. Data was last updated April 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $725 (Expedia) |
One-way from | $497 (Kiwi.com) |
Popular in | December |
Cheapest in | February |
Average price | $663 |
Cheapflights Fare Finder
Customize your flight search to find flights from Boise 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 23, 2026.
Use the filters below to find and compare flights from Boise 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
Sun 10/18
5:40 am-2:35 pm
2 stops25h 55m
Lisbon Humberto Delgado
Tue 11/3
5:00 am-11:55 pm
2 stops25h 55m
$726
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Mon 10/19
5:40 am-8:00 am
2 stops19h 20m
Lisbon Humberto Delgado
Sun 11/1
11:15 am-11:55 pm
2 stops19h 40m
$732
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Mon 10/19
6:25 am-9:20 am
2 stops19h 55m
Lisbon Humberto Delgado
Wed 10/28
1:00 pm-5:55 pm
2 stops34h 55m
$783
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Mon 10/19
4:05 pm-5:50 pm
2 stops18h 45m
Lisbon Humberto Delgado
Sat 10/31
12:20 pm-9:17 pm
2 stops38h 57m
$817
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 10/6
2:35 pm-5:50 pm
2 stops20h 15m
Lisbon Humberto Delgado
Tue 10/20
5:00 am-8:17 pm
2 stops22h 17m
$845
Quickest round-trip
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 5/12
12:15 pm-2:35 pm
2 stops19h 20m
Lisbon Humberto Delgado
Tue 5/19
9:20 am-8:34 pm
2 stops18h 14m
$885
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 9/15
7:05 am-10:30 am
2 stops20h 25m
Lisbon Humberto Delgado
Thu 9/24
11:25 am-11:52 pm
2 stops43h 27m
$931
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 10/6
2:57 pm-3:35 pm
2 stops17h 38m
Lisbon Humberto Delgado
Sun 10/18
6:50 pm-10:17 pm
2 stops34h 27m
$988
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 9/8
3:30 pm-5:50 pm
2 stops19h 20m
Lisbon Humberto Delgado
Sat 9/19
8:55 am-8:18 pm
2 stops18h 23m
$1,001
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Mon 6/8
3:31 pm-5:50 pm
2 stops19h 19m
Lisbon Humberto Delgado
Fri 6/26
5:00 am-7:13 pm
2 stops21h 13m
$1,037
Showing 1-10 of 19 resultsSorted by cheapest first
Best time to book a flight from Boise to Portugal
Have a flexible travel schedule? Discover the best time to fly to Portugal from Boise with our price prediction graph.
BOI-LIS
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 Boise to Portugal
BOI-PT0
BOI-LIS
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing Portugal
Get insights into the airlines that provide service to Portugal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portugal. Reviews last updated April 23, 2026.
Get a feel of what it's like to fly with Delta and United Airlines from Boise to Portugal by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.9
Overall
7.9
Crew
8.5
Boarding
8.1
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Overall
7.9
Crew
8.5
Boarding
8.1
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Overall
7.9
Crew
8.5
Boarding
8.1
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
Find useful and relevant information for your journey from Boise 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 Boise 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 Boise to Portugal by cabin class
Find flights from Boise to Portugal, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boise and Portugal flights
Browse other Boise and Portugal flight options. Last updated on April 23, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Fly to Portugal regions
Consider these flights traveling to Portugal regions.
Top 2 airlines flying from Boise to Portugal
Discover the top 2 airlines that operate flights from Boise 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 23, 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% |