$413+ 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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Aug 25 — Sep 11
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 July 26, 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 July 26, 2026.
This Expedia deal was found by Cheapflights users on 7/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:00 am
BOI
- LIS
2 stops21h 20m
Air Canada
Tue 11/1012:50 pm
LIS
- BOI
2 stops29h 51m
Air Canada
Deal found 7/21![Air Canada logo]()
$730
This United Airlines deal was found by Cheapflights users on 7/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/69:40 am
BOI
- LIS
2 stops15h 30m
United Airlines
Thu 12/1010:55 am
LIS
- BOI
2 stops41h 21m
United Airlines
Deal found 7/21![United Airlines logo]()
$731
This United Airlines deal was found by Cheapflights users on 7/22. 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.
Sat 11/215:44 pm
BOI
- LIS
2 stops56h 36m
United Airlines
Wed 11/2511:20 am
LIS
- BOI
2 stops31h 21m
United Airlines
Deal found 7/22![United Airlines logo]()
$740
This Air Canada deal was found by Cheapflights users on 7/22. 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.
Sun 11/16:30 am
BOI
- LIS
2 stops19h 50m
Multiple Airlines
Wed 11/1111:20 am
LIS
- BOI
3 stops29h 18m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$763
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/37:00 am
BOI
- LIS
2 stops18h 10m
United Airlines
Sun 12/1310:50 am
LIS
- BOI
2 stops44h 09m
United Airlines
Deal found 7/25![United Airlines logo]()
$831
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/215:00 am
BOI
- LIS
2 stops21h 20m
United Airlines
Sat 10/315:00 am
LIS
- BOI
2 stops37h 19m
United Airlines
Deal found 7/25![United Airlines logo]()
$853
This Finnair deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/297:00 am
BOI
- LIS
2 stops25h 25m
Finnair
Tue 1/54:10 pm
LIS
- BOI
2 stops34h 15m
Finnair
Deal found 7/25![Finnair logo]()
$884
This Delta deal was found by Cheapflights users on 7/22. 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.
Thu 10/156:45 am
BOI
- LIS
2 stops21h 30m
Delta
Sat 10/245:00 am
LIS
- BOI
2 stops19h 14m
Delta
Deal found 7/22![Delta logo]()
$904
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/810:31 am
BOI
- LIS
2 stops16h 59m
United Airlines
Tue 9/1511:25 am
LIS
- BOI
2 stops31h 01m
United Airlines
Deal found 7/25![United Airlines logo]()
$934
This Delta deal was found by Cheapflights users on 7/21. 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.
Thu 8/2010:35 am
BOI
- LIS
2 stops24h 15m
Delta
Thu 8/275:00 am
LIS
- BOI
2 stops20h 48m
Delta
Deal found 7/21![Delta logo]()
$953
This Air Canada deal was found by Cheapflights users on 7/22. 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.
Thu 10/1510:30 am
BOI
- LIS
3 stops17h 35m
Multiple Airlines
Sat 10/2411:25 am
LIS
- BOI
2 stops18h 08m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$957
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 July 26, 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 July 26, 2026.
This United Airlines deal was found by Cheapflights users on 7/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/69:40 am
BOI
- LIS
2 stops15h 30m
United Airlines
Thu 12/1010:55 am
LIS
- BOI
2 stops41h 21m
United Airlines
Deal found 7/21![United Airlines logo]()
$731
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:45 am
BOI
- LIS
2 stops21h 30m
Delta
Sat 10/245:00 am
LIS
- BOI
2 stops19h 14m
Delta
Deal found 7/24![Delta logo]()
$904
This United Airlines deal was found by Cheapflights users on 7/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/810:31 am
BOI
- LIS
2 stops16h 59m
United Airlines
Sat 9/1911:25 am
LIS
- BOI
2 stops41h 20m
United Airlines
Deal found 7/21![United Airlines logo]()
$994
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1512:17 pm
BOI
- LIS
2 stops22h 33m
Delta
Sat 9/265:35 am
LIS
- BOI
2 stops24h 24m
Delta
Deal found 7/24![Delta logo]()
$1,010
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/45:44 pm
BOI
- LIS
2 stops31h 36m
United Airlines
Sat 9/1211:25 am
LIS
- BOI
2 stops41h 20m
United Airlines
Deal found 7/25![United Airlines logo]()
$1,064
Last-minute flights from Boise to PortugalDiscover last-minute flight deals from Boise to Portugal. Data last updated July 26, 2026 and is based on user searches.
Discover last-minute flight deals from Boise to Portugal. Data last updated July 26, 2026 and is based on user searches.
This British Airways deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/73:19 pm
BOI
- LIS
2 stops19h 41m
Multiple Airlines
Wed 8/128:55 am
LIS
- BOI
2 stops33h 21m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$1,216
This Delta deal was found by Cheapflights users on 7/21. 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.
Thu 8/2010:35 am
BOI
- LIS
2 stops24h 15m
Delta
Thu 8/275:00 am
LIS
- BOI
2 stops20h 48m
Delta
Deal found 7/21![Delta logo]()
$953
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2010:14 am
BOI
- LIS
1 stop18h 31m
Multiple Airlines
Thu 8/279:55 am
LIS
- BOI
1 stop19h 32m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$1,198
This American Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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 8/213:19 pm
BOI
- LIS
2 stops19h 41m
American Airlines
Fri 8/2811:05 am
LIS
- BOI
2 stops18h 06m
American Airlines
Deal found 7/24![American Airlines logo]()
$961
This Air Canada deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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 8/2110:31 am
BOI
- LIS
3 stops17h 34m
Multiple Airlines
Fri 8/2811:25 am
LIS
- BOI
2 stops18h 15m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$1,700
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 July 26, 2026.
Search for one-way flight options from Boise to Portugal. Find affordable one-way fares based on user searches. Data last updated July 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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 10/210:14 am
BOI
- LIS
3 stops52h 41m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$413
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/11:24 pm
BOI
- LIS
3 stops26h 26m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$462
This United Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:30 am
BOI
- LIS
2 stops17h 00m
United Airlines
Deal found 7/24![United Airlines logo]()
$463
This United Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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 8/217:05 pm
BOI
- LIS
2 stops57h 00m
United Airlines
Deal found 7/24![United Airlines logo]()
$483
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/12:53 pm
BOI
- LIS
2 stops19h 57m
Delta
Deal found 7/24![Delta logo]()
$528
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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 10/218:57 am
BOI
- LIS
1 stop19h 53m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$760
This Air Canada deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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 8/2110:31 am
BOI
- LIS
3 stops17h 34m
Air Canada
Deal found 7/24![Air Canada logo]()
$863
This Cheapflightsfares deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/212:44 pm
BOI
- LIS
2 stops25h 01m
Lufthansa
Deal found 7/24![Lufthansa logo]()
$991
This Ovago deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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.
Fri 8/213:19 pm
BOI
- LIS
1 stop33h 56m
TAP AIR PORTUGAL
Deal found 7/24![TAP AIR PORTUGAL logo]()
$1,025
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 July 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $730 (Expedia) |
One-way from | $413 (Kiwi.com) |
Popular in | December |
Cheapest in | November |
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 July 26, 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 12/6
9:40 am-8:10 am
2 stops15h 30m
Lisbon Humberto Delgado
Thu 12/10
10:55 am-9:16 pm
2 stops41h 21m
$731
Quickest round-trip
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Thu 10/15
6:45 am-11:15 am
2 stops21h 30m
Lisbon Humberto Delgado
Sat 10/24
5:00 am-5:14 pm
2 stops19h 14m
$904
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 9/8
10:31 am-10:30 am
2 stops16h 59m
Lisbon Humberto Delgado
Sat 9/19
11:25 am-9:45 pm
2 stops41h 20m
$994
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 9/15
12:17 pm-5:50 pm
2 stops22h 33m
Lisbon Humberto Delgado
Sat 9/26
5:35 am-10:59 pm
2 stops24h 24m
$1,010
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Fri 9/4
5:44 pm-8:20 am
2 stops31h 36m
Lisbon Humberto Delgado
Sat 9/12
11:25 am-9:45 pm
2 stops41h 20m
$1,064
Cheapest one-way
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 9/1
1:24 pm-10:50 pm
3 stops26h 26m
$462
Quickest one-way
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Wed 10/21
10:30 am-10:30 am
2 stops17h 00m
$463
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Fri 8/21
7:05 pm-11:05 am
2 stops57h 00m
$483
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 9/1
2:53 pm-5:50 pm
2 stops19h 57m
$528
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Fri 8/21
3:19 pm-8:15 am
1 stop33h 56m
$1,025
Showing 1-10 of 13 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 July 26, 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
7.8
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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 July 26, 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 July 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$467 | Average$937 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$549 | Average$827 | FlexibilityNo cancel fee | On-timeN/A |