$331+ 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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Aug 6 — Aug 131
Round-trip
1 adult, Economy
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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 7, 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 7, 2026.
This United Airlines deal was found by Cheapflights users on 7/2. 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 12/67:00 am
BOI
- LIS
2 stops18h 10m
United Airlines
Wed 12/911:20 am
LIS
- BOI
2 stops43h 39m
United Airlines
Deal found 7/2![United Airlines logo]()
$726
This Air Canada deal was found by Cheapflights users on 7/7. 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 11/76:30 am
BOI
- LIS
2 stops19h 10m
Multiple Airlines
Wed 11/1111:20 am
LIS
- BOI
3 stops29h 18m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$818
This Delta deal was found by Cheapflights users on 7/3. 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 10/158:22 am
BOI
- LIS
2 stops19h 53m
Delta
Sat 10/245:00 am
LIS
- BOI
2 stops20h 33m
Delta
Deal found 7/3![Delta logo]()
$885
This Justfly.com deal was found by Cheapflights users on 7/3. 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 9/812:14 pm
BOI
- LIS
2 stops28h 01m
Scandinavian Airlines
Sat 9/1910:55 pm
LIS
- BOI
2 stops26h 44m
Scandinavian Airlines
Deal found 7/3![Scandinavian Airlines logo]()
$907
This United Airlines deal was found by Cheapflights users on 7/6. 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 8/306:30 am
BOI
- LIS
2 stops19h 50m
United Airlines
Thu 9/1011:25 am
LIS
- BOI
2 stops31h 01m
United Airlines
Deal found 7/6![United Airlines logo]()
$928
This Air France deal was found by Cheapflights users on 7/7. 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.
Fri 8/2110:35 am
BOI
- LIS
2 stops17h 40m
Multiple Airlines
Fri 8/285:00 am
LIS
- BOI
2 stops19h 55m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$948
This Air Canada deal was found by Cheapflights users on 7/6. 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 8/308:15 am
BOI
- LIS
2 stops18h 05m
Multiple Airlines
Thu 9/1011:25 am
LIS
- BOI
3 stops31h 01m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$958
This United Airlines deal was found by Cheapflights users on 7/7. 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 9/86:30 am
BOI
- LIS
2 stops19h 50m
United Airlines
Sat 9/1911:25 am
LIS
- BOI
2 stops41h 12m
United Airlines
Deal found 7/7![United Airlines logo]()
$988
This United Airlines deal was found by Cheapflights users on 7/6. 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 9/155:00 am
BOI
- LIS
2 stops21h 20m
United Airlines
Sat 9/261:00 pm
LIS
- BOI
2 stops29h 28m
United Airlines
Deal found 7/6![United Airlines logo]()
$993
This Delta deal was found by Cheapflights users on 7/7. 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 8/65:30 am
BOI
- LIS
2 stops22h 45m
Delta
Thu 8/135:00 am
LIS
- BOI
2 stops23h 57m
Delta
Deal found 7/7![Delta logo]()
$998
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 7, 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 7, 2026.
This United Airlines deal was found by Cheapflights users on 7/6. 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
Wed 12/911:20 am
LIS
- BOI
2 stops43h 39m
United Airlines
Deal found 7/6![United Airlines logo]()
$726
This Delta deal was found by Cheapflights users on 7/6. 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 10/158:22 am
BOI
- LIS
2 stops19h 53m
Delta
Sat 10/245:00 am
LIS
- BOI
2 stops20h 33m
Delta
Deal found 7/6![Delta logo]()
$885
This KLM deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:08 pm
BOI
- LIS
2 stops19h 27m
KLM
Sat 10/245:00 am
LIS
- BOI
2 stops20h 33m
KLM
Deal found 7/4![KLM logo]()
$889
This Air Canada deal was found by Cheapflights users on 7/6. 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 8/308:15 am
BOI
- LIS
2 stops18h 05m
Multiple Airlines
Thu 9/1011:25 am
LIS
- BOI
3 stops31h 01m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$958
This United Airlines deal was found by Cheapflights users on 7/6. 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 8/306:30 am
BOI
- LIS
2 stops19h 50m
United Airlines
Thu 9/1011:25 am
LIS
- BOI
2 stops31h 01m
United Airlines
Deal found 7/6![United Airlines logo]()
$928
This United Airlines deal was found by Cheapflights users on 7/7. 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 9/86:30 am
BOI
- LIS
2 stops19h 50m
United Airlines
Sat 9/1911:25 am
LIS
- BOI
2 stops41h 12m
United Airlines
Deal found 7/7![United Airlines logo]()
$988
Last-minute flights from Boise to PortugalDiscover last-minute flight deals from Boise to Portugal. Data last updated July 7, 2026 and is based on user searches.
Discover last-minute flight deals from Boise to Portugal. Data last updated July 7, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/7. 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 7/2612:20 pm
BOI
- LIS
2 stops22h 30m
Delta
Tue 8/45:00 am
LIS
- BOI
2 stops20h 48m
Delta
Deal found 7/7![Delta logo]()
$1,139
This Delta deal was found by Cheapflights users on 7/7. 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 8/65:30 am
BOI
- LIS
2 stops22h 45m
Delta
Thu 8/135:00 am
LIS
- BOI
2 stops23h 57m
Delta
Deal found 7/7![Delta logo]()
$998
This Air France deal was found by Cheapflights users on 7/7. 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.
Fri 8/2110:35 am
BOI
- LIS
2 stops17h 40m
Multiple Airlines
Fri 8/285:00 am
LIS
- BOI
2 stops19h 55m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$948
This United Airlines deal was found by Cheapflights users on 7/6. 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 8/306:30 am
BOI
- LIS
2 stops19h 50m
United Airlines
Thu 9/1011:25 am
LIS
- BOI
2 stops31h 01m
United Airlines
Deal found 7/6![United Airlines logo]()
$928
This Air Canada deal was found by Cheapflights users on 7/6. 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 8/308:15 am
BOI
- LIS
2 stops18h 05m
Multiple Airlines
Thu 9/1011:25 am
LIS
- BOI
3 stops31h 01m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$958
This Air Canada deal was found by Cheapflights users on 7/6. 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 8/308:23 am
BOI
- LIS
3 stops17h 57m
Air Canada
Thu 9/1011:25 am
LIS
- BOI
3 stops31h 01m
Air Canada
Deal found 7/6![Air Canada logo]()
$1,475
This Justfly.com deal was found by Cheapflights users on 7/7. 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 8/3110:31 am
BOI
- LIS
2 stops41h 34m
Air Canada
Mon 10/511:25 am
LIS
- BOI
2 stops41h 10m
Air Canada
Deal found 7/7![Air Canada logo]()
$993
This Air Canada deal was found by Cheapflights users on 7/7. 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 8/3110:31 am
BOI
- LIS
3 stops17h 29m
Multiple Airlines
Mon 10/51:00 pm
LIS
- BOI
2 stops29h 28m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$1,405
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 7, 2026.
Search for one-way flight options from Boise to Portugal. Find affordable one-way fares based on user searches. Data last updated July 7, 2026.
This American Airlines deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/203:24 pm
BOI
- LIS
2 stops17h 11m
American Airlines
Deal found 7/6![American Airlines logo]()
$331
This Delta deal was found by Cheapflights users on 7/6. 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 10/1911:35 pm
BOI
- LIS
2 stops25h 25m
Delta
Deal found 7/6![Delta logo]()
$334
This Air Canada deal was found by Cheapflights users on 7/6. 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 10/2010:30 am
BOI
- LIS
3 stops17h 35m
Air Canada
Deal found 7/6![Air Canada logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 7/6. 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 10/212:08 pm
BOI
- LIS
3 stops25h 07m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$445
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/192:08 pm
BOI
- LIS
3 stops23h 02m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$451
This Kiwi.com deal was found by Cheapflights users on 7/6. 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 10/318:00 pm
BOI
- LIS
3 stops53h 40m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$464
This Kiwi.com deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:26 am
BOI
- LIS
1 stop21h 19m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$684
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 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $726 (United Airlines) |
One-way from | $331 (American Airlines) |
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 7, 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
Wed 12/9
11:20 am-11:59 pm
2 stops43h 39m
$726
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Thu 10/15
8:22 am-11:15 am
2 stops19h 53m
Lisbon Humberto Delgado
Sat 10/24
5:00 am-6:33 pm
2 stops20h 33m
$885
Quickest round-trip
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Thu 10/15
12:08 pm-2:35 pm
2 stops19h 27m
Lisbon Humberto Delgado
Sat 10/24
5:00 am-6:33 pm
2 stops20h 33m
$889
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Sun 8/30
6:30 am-9:20 am
2 stops19h 50m
Lisbon Humberto Delgado
Thu 9/10
11:25 am-11:26 am
2 stops31h 01m
$928
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Sun 8/30
8:15 am-9:20 am
2 stops18h 05m
Lisbon Humberto Delgado
Thu 9/10
11:25 am-11:26 am
3 stops31h 01m
$958
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 9/8
6:30 am-9:20 am
2 stops19h 50m
Lisbon Humberto Delgado
Sat 9/19
11:25 am-9:37 pm
2 stops41h 12m
$988
Cheapest one-way
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 10/20
3:24 pm-5:55 pm
2 stops19h 31m
$331
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Mon 10/19
11:35 pm-8:00 am
2 stops25h 25m
$334
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Wed 10/21
10:30 am-10:30 am
2 stops17h 00m
$334
Quickest one-way
BoiseLisbon
BOI - LIS
BOILIS
Boise Air Term. Gowen Fld
Tue 10/20
10:30 am-8:20 am
2 stops14h 50m
$334
Showing 1-10 of 14 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 7, 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
Food
7.2
Overall
7.8
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Boarding
8.1
Food
7.2
Overall
7.8
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Boarding
8.1
Food
7.2
Overall
7.8
Crew
8.5
Entertainment
7.8
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.
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Boise and Portugal flights
Browse other Boise and Portugal flight options. Last updated on July 7, 2026.
Popular flight searches
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Boise to Portugal flights
Consider these flights traveling from Boise to Portugal.
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 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$549 | Average$827 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$618 | Average$885 | FlexibilityNo cancel fee | On-time69% |