$732+ Cheap flights from Boise (BOI) to Portugal
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Oct 8 — Oct 151
Round-trip
1 adult, Economy
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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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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Boise to Portugal
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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 September 8, 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 September 8, 2026.
This Finnair deal was found by Cheapflights users on 9/5. 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 10/2712:14 pm -
2 stops20h 36m
Wed 11/116:30 am -
2 stops23h 12m
Deal found 9/5![Multiple Airlines logo]()
$758
This Air France deal was found by Cheapflights users on 9/4. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:14 pm -
2 stops18h 56m
Mon 11/236:30 pm -
2 stops30h 25m
Deal found 9/4![Air France logo]()
$767
This Delta deal was found by Cheapflights users on 9/6. 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 12/2811:52 pm -
2 stops25h 08m
Mon 1/115:00 am -
2 stops25h 55m
Deal found 9/6![Delta logo]()
$847
This United Airlines deal was found by Cheapflights users on 9/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:20 am -
2 stops20h 00m
Tue 12/111:20 am -
2 stops41h 23m
Deal found 9/3![United Airlines logo]()
$866
This American Airlines deal was found by Cheapflights users on 9/6. 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.
Fri 12/41:24 pm -
2 stops18h 31m
Sat 12/1910:40 am -
2 stops20h 17m
Deal found 9/6![American Airlines logo]()
$869
This Delta deal was found by Cheapflights users on 9/6. 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 10/153:36 pm -
2 stops19h 14m
Sat 10/245:35 am -
2 stops20h 11m
Deal found 9/6![Delta logo]()
$942
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Mon 12/2812:31 pm -
2 stops36h 39m
Mon 1/115:00 am -
3 stops65h 03m
Deal found 9/6![United Airlines logo]()
$951
This Delta deal was found by Cheapflights users on 9/6. 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.
Sun 12/275:30 am -
2 stops22h 00m
Sat 1/95:00 am -
2 stops22h 17m
Deal found 9/6![Delta logo]()
$971
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Fri 12/44:24 pm -
3 stops56h 46m
Sat 12/1911:20 am -
2 stops41h 23m
Deal found 9/6![United Airlines logo]()
$990
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 September 8, 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 September 8, 2026.
This United Airlines deal was found by Cheapflights users on 9/8. 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 2/106:25 am -
2 stops18h 45m
Tue 2/1611:20 am -
2 stops40h 55m
Deal found 9/8![United Airlines logo]()
$732
This Delta deal was found by Cheapflights users on 9/6. 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 10/153:36 pm -
2 stops19h 14m
Sat 10/245:35 am -
2 stops20h 11m
Deal found 9/6![Delta logo]()
$942
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Mon 1/1111:48 am -
2 stops37h 22m
Thu 1/148:55 am -
2 stops58h 00m
Deal found 9/7![United Airlines logo]()
$743
This United Airlines deal was found by Cheapflights users on 9/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:20 am -
2 stops20h 00m
Tue 12/111:20 am -
2 stops41h 23m
Deal found 9/3![United Airlines logo]()
$866
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Mon 12/2812:31 pm -
2 stops36h 39m
Mon 1/115:00 am -
3 stops65h 03m
Deal found 9/6![United Airlines logo]()
$951
This United Airlines deal was found by Cheapflights users on 9/6. 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 12/276:05 am -
2 stops44h 15m
Sat 1/95:00 am -
3 stops41h 03m
Deal found 9/6![United Airlines logo]()
$1,045
Last-minute flights from Boise to PortugalDiscover last-minute flight deals from Boise to Portugal. Data last updated September 8, 2026 and is based on user searches.
Discover last-minute flight deals from Boise to Portugal. Data last updated September 8, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 9/6. 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 10/153:36 pm -
2 stops19h 14m
Sat 10/245:35 am -
2 stops20h 11m
Deal found 9/6![Delta logo]()
$942
This Air Canada deal was found by Cheapflights users on 9/5. 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 10/1512:26 pm -
2 stops15h 39m
Sat 10/2411:25 am -
3 stops29h 27m
Deal found 9/5![Multiple Airlines logo]()
$1,808
This Air Canada deal was found by Cheapflights users on 9/5. 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 -
3 stops17h 35m
Sat 10/2411:25 am -
3 stops29h 27m
Deal found 9/5![Air Canada logo]()
$1,905
This Finnair deal was found by Cheapflights users on 9/5. 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 10/2712:14 pm -
2 stops20h 36m
Wed 11/116:30 am -
2 stops23h 12m
Deal found 9/5![Multiple Airlines logo]()
$758
This BusinessClass deal was found by Cheapflights users on 9/6. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2812:14 pm -
2 stops21h 11m
Wed 11/1110:45 am -
2 stops18h 35m
Deal found 9/6![Multiple Airlines logo]()
$1,777
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 September 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $731 (Air Canada) |
Popular in | December |
Cheapest in | April |
Average price | $1,490 |
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 7,457,451 searches. Data last updated September 8, 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 Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Wed 2/10
6:25 am-8:10 am
2 stops18h 45m
Lisbon Humberto Delgado
Tue 2/16
11:20 am-9:15 pm
2 stops40h 55m
$732
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Mon 1/11
11:48 am-8:10 am
2 stops37h 22m
Lisbon Humberto Delgado
Thu 1/14
8:55 am-11:55 am
2 stops58h 00m
$743
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Thu 11/19
6:20 am-9:20 am
2 stops20h 00m
Lisbon Humberto Delgado
Tue 12/1
11:20 am-9:43 pm
2 stops41h 23m
$866
Quickest round-trip
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Thu 10/15
3:36 pm-5:50 pm
2 stops19h 14m
Lisbon Humberto Delgado
Sat 10/24
5:35 am-6:46 pm
2 stops20h 11m
$942
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Mon 12/28
12:31 pm-8:10 am
2 stops36h 39m
Lisbon Humberto Delgado
Mon 1/11
5:00 am-3:03 pm
3 stops65h 03m
$951
BoiseLisbon
BOI Boise Air Term. Gowen Fld - LIS Lisbon Humberto Delgado
BOILIS
Boise Air Term. Gowen Fld
Sun 12/27
6:05 am-9:20 am
2 stops44h 15m
Lisbon Humberto Delgado
Sat 1/9
5:00 am-3:03 pm
3 stops41h 03m
$1,045
Sorted 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 September 8, 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.
Entertainment
7.8
Comfort
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Comfort
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Comfort
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - 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 September 8, 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 7,457,451 searches. Data last updated September 8, 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 |