HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$648+ 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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boise 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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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

Keep the following information in mind while searching for Boise to Portugal flight deals. Data was last updated April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$813
(United Airlines)

Popular in

June

Cheapest in

February

Average price

$1,059
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Lisbon Humberto Delgado flights.
Search Deals
From Boise Air Term. Gowen Fld to Portugal
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($206 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Boise to Portugal

Cheapest flights from Boise to Portugal
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 29, 2025.

This United Airlines deal was found by Cheapflights users on 4/28. 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 10/225:00 amBOI - LIS
2 stops20h 20mUnited Airlines
Wed 11/1910:15 amLIS - BOI
2 stops19h 50mUnited Airlines
Deal found 4/28$648
This Air Canada deal was found by Cheapflights users on 4/28. 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.
Wed 10/2210:45 amBOI - LIS
3 stops17h 20mMultiple Airlines
Wed 11/1911:00 amLIS - BOI
2 stops31h 37mMultiple Airlines
Deal found 4/28$661
This Air Canada deal was found by Cheapflights users on 4/29. 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 5/1310:20 amBOI - LIS
3 stops17h 45mAir Canada
Wed 5/2111:25 amLIS - BOI
3 stops18h 27mAir Canada
Deal found 4/29$1,409
This Ovago deal was found by Cheapflights users on 4/28. 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 5/21:10 pmBOI - LIS
2 stops36h 50mScandinavian Airlines
Sun 5/48:15 pmLIS - BOI
2 stops32h 19mScandinavian Airlines
Deal found 4/28$1,492

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 29, 2025.
Use the filters below to find and compare flights from Boise to Portugal that are best for you.

Fly from

Boise

Fly to

Portugal

Route

Depart

Return

Price

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 5/13

5:25 pm-9:50 pm

2 stops21h 25m

Lisbon Humberto Delgado

Wed 5/21

11:25 am-6:01 pm

2 stops37h 36m

$813

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sun 5/25

7:07 pm-9:20 am

3 stops31h 13m

Lisbon Humberto Delgado

Sun 6/1

12:50 pm-10:57 pm

2 stops41h 07m

$1,177

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 5/13

10:20 am-11:05 am

3 stops17h 45m

Lisbon Humberto Delgado

Wed 5/21

11:25 am-10:52 pm

3 stops18h 27m

$1,409

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Fri 5/2

1:10 pm-9:00 am

2 stops36h 50m

Lisbon Humberto Delgado

Sun 5/4

8:15 pm-9:34 pm

2 stops32h 19m

$1,492

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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.
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

What is the cheapest month to book a flight from Boise to Portugal?

Currently, January is the cheapest month in which you can book a flight from Boise to Portugal (average of $612). Flying from Boise to Portugal in June is currently the most expensive (average of $1,178). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOI to PT?

Find hourly flight availability from Boise to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 29, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Boise to Portugal as you normally would.

Rainfall in Portugal by month

Plan your trip to Portugal by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.

Temperature in Portugal by month

Plan your trip to Portugal by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portugal, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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 29, 2025.
United Airlines
7.4
Good
8,696 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,696 reviews
United Airlines
7.4
Good
8,696 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Scandinavian Airlines
7.3
Good
1,349 reviews
United Airlines
7.4
Good
8,696 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.0
Good
9,244 reviews
United Airlines
7.4
Good
8,696 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

  • What airport do you fly from for flights from Boise to Portugal?

    If you book a flight to Portugal from Boise, you will be flying from Air Term. Gowen Fld, which is the city’s only airport. Boise Air Term. Gowen Fld (BOI) is located 3.3 mi from the center of Boise.

  • Can I find deals for flights from Boise to Portugal that include hotel bookings?

    Yes. In addition to deals on Boise to Portugal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boise to Portugal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boise to Portugal.

  • Can I find deals for business class flights from Boise to Portugal?

    Yes. Cheapflights offers flight deals from Boise to Portugal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boise to Portugal?

    Currently, January is the cheapest month in which you can book a flight from Boise to Portugal (average of $612). Flying from Boise to Portugal in June is currently the most expensive (average of $1,178). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boise to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
Boise to Heathrow flights
Boise to Dublin flights
Boise to Gatwick flights
Spokane to Heathrow flights
Spokane to Leonardo da Vinci/Fiumicino flights
Boise to Charles de Gaulle flights
Boise to Leonardo da Vinci/Fiumicino flights
Spokane to Edinburgh flights
Spokane to Dublin flights
Spokane to Madrid flights
Spokane to Malpensa flights
Spokane to Lisbon flights
Boise to Frankfurt flights
Boise to Barcelona-El Prat flights
Spokane to Frankfurt flights
Boise to Vicenza flights
Spokane to Gatwick flights
Boise to Copenhagen flights
Spokane to Charles de Gaulle flights
Boise to Edinburgh flights
Boise to London City flights
Boise to Amsterdam flights
Spokane to Florence flights
Spokane to Keflavik Intl flights
Boise to Malpensa flights
Spokane to Athens flights
Boise to Linate flights
Boise to Athens flights
Boise to Keflavik Intl flights
Boise to Lisbon flights
Boise to Madrid flights
Spokane to London City flights
Boise to Orly flights
Spokane to Glasgow Intl flights
Boise to Bruxelles-National flights
Boise to Duesseldorf Intl flights
Boise to Oslo Gardermoen flights
Spokane to Munich flights
Boise to Bilbao flights
Spokane to Berlin flights
Jackson to Charles de Gaulle flights
Spokane to Zurich flights
Spokane to Amsterdam flights
Idaho Falls to Heathrow flights
Boise to Sarajevo flights
Boise to Shannon flights
Boise to Zurich flights
Spokane to Barcelona-El Prat flights

Top 6 airlines flying from Boise to Portugal

Discover the top 6 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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$621Average$1,094FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$649Average$1,350FlexibilityNo cancel feeOn-time69%
Air FranceCheapest$654Average$1,042FlexibilityNo cancel feeOn-time77%
DeltaCheapest$654Average$1,173FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$701Average$1,135FlexibilityNo cancel feeOn-time67%
KLMCheapest$814Average$989FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.