$658 Cheap Flights from Lisbon (LIS) to Boise (BOI)

View $658 flight on Mon, Mar 16, 2026Opens in a new window

Popular airlines from Humberto Delgado Airport (LIS) to Boise Airport (BOI)

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Lisbon to Boise (LIS-BOI)

Prices were available within the past 7 days and start at $658 for one-way flights and $1,045 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, May 27 - Wed, Jun 10
LIS
Lisbon
BOI
Boise
$1,045 Roundtrip, found 6 days ago
$1,045
Roundtrip
found 6 days ago
Select United flight, departing Wed, May 27 from Lisbon to Boise, returning Wed, Jun 10, priced at $1,045 found 6 days ago
Lufthansa
Wed, May 27 - Wed, Jun 10
LIS
Lisbon
BOI
Boise
$1,058 Roundtrip, found 6 days ago
$1,058
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Wed, May 27 from Lisbon to Boise, returning Wed, Jun 10, priced at $1,058 found 6 days ago
British Airways
Wed, May 27 - Wed, Jun 10
LIS
Lisbon
BOI
Boise
$1,074 Roundtrip, found 6 days ago
$1,074
Roundtrip
found 6 days ago
Select British Airways flight, departing Wed, May 27 from Lisbon to Boise, returning Wed, Jun 10, priced at $1,074 found 6 days ago
United
Wed, May 27 - Wed, Jun 10
LIS
Lisbon
BOI
Boise
$1,079 Roundtrip, found 6 days ago
$1,079
Roundtrip
found 6 days ago
Select United flight, departing Wed, May 27 from Lisbon to Boise, returning Wed, Jun 10, priced at $1,079 found 6 days ago
Lufthansa
Wed, May 27 - Wed, Jun 10
LIS
Lisbon
BOI
Boise
$1,095 Roundtrip, found 6 days ago
$1,095
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Wed, May 27 from Lisbon to Boise, returning Wed, Jun 10, priced at $1,095 found 6 days ago
Finnair
Wed, May 27 - Wed, Jun 10
LIS
Lisbon
BOI
Boise
$1,392 Roundtrip, found 6 days ago
$1,392
Roundtrip
found 6 days ago
Select Finnair flight, departing Wed, May 27 from Lisbon to Boise, returning Wed, Jun 10, priced at $1,392 found 6 days ago
Virgin Atlantic
Wed, May 27 - Wed, Jun 10
LIS
Lisbon
BOI
Boise
$1,467 Roundtrip, found 6 days ago
$1,467
Roundtrip
found 6 days ago
Select Virgin Atlantic flight, departing Wed, May 27 from Lisbon to Boise, returning Wed, Jun 10, priced at $1,467 found 6 days ago
Swiss International Air Lines
Wed, May 27 - Wed, Jun 10
LIS
Lisbon
BOI
Boise
$1,529 Roundtrip, found 6 days ago
$1,529
Roundtrip
found 6 days ago
Select Swiss International Air Lines flight, departing Wed, May 27 from Lisbon to Boise, returning Wed, Jun 10, priced at $1,529 found 6 days ago
Flights from Lisbon (LIS) to Boise (BOI)
Origin airport
Humberto Delgado
Destination airport
Boise
Roundtrip price
$1,045
Distance
5154 mi

Lisbon to Boise Flights

The cheapest times to fly from Lisbon to Boise

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Lisbon to Boise are during the month of May. You can find some of the cheapest flights from Lisbon to Boise with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Lisbon to Boise

Sunday is one of the best days to book for cheap flights from Lisbon to Boise: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Lisbon to Boise

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Lisbon to Boise in 2026. You can also book with separate airlines for your outbound and return journeys, from $658 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Lisbon to Boise flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Lisbon to Boise airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Humberto Delgado Airport (LIS) to Boise Airport (BOI) cost?
Lock in a cheap one-way flight from $658 or cheap return flight from $1,045 from Humberto Delgado Airport (LIS) to Boise Airport (BOI) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Humberto Delgado Airport (LIS) to Boise Airport (BOI)?
The cheapest month to fly from LIS to BOI is May, when demand is low. Off-peak months are typically when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Humberto Delgado Airport (LIS) to Boise Airport (BOI)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest LIS to BOI flight.
How many flights per day from Humberto Delgado Airport (LIS) to Boise Airport (BOI)?
You'll need to take a flight with a layover when traveling from Humberto Delgado Airport (LIS) to Boise Airport (BOI). Direct flights don't operate daily on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from LIS to BOI?
Usually you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Humberto Delgado Airport (LIS) to Boise Airport (BOI)?
To avoid possible delays on the Humberto Delgado Airport (LIS) to Boise Airport (BOI) route, aim to fly before 3 PM. Flights after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Humberto Delgado Airport (LIS) to Boise Airport (BOI) last-minute?
Last-minute fares from LIS to BOI are generally more expensive. For the lowest prices, start looking for flights as early as possible. That being said, if you're flexible with your travel plans, it's possible to find a cheap fare right before your journey.
Is it cheaper to book a LIS to BOI flight and hotel package?
You'll typically save money by booking a LIS to BOI flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. After choosing your ideal accommodations and flights, consider adding extras like activities, car rentals and tours.
Can I cancel or change the date of my flight from Humberto Delgado Airport (LIS) to Boise Airport (BOI)?
If you booked your LIS to BOI flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

Explore a world of travel with Expedia

*Available to One Key members.