$520 Find Cheap Flights from Boise to Portugal

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boise to Portugal departing on 7/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Boise to Portugal

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Lisbon
Lisbon2 stops$726
Porto
Porto2 stops$918
Lisbon
Lisbon2 stops$726
Porto
Porto2 stops$918

Book Cheap Boise to Portugal Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boise to Portugal that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boise to Portugal

Mon, Oct 26 - Tue, Nov 10
United Airlines Logo
6:20 am - 9:50 am
BOI
-
LIS
21h 30m
2 stops
United Airlines Logo
1:00 pm - 9:16 pm
LIS
-
BOI
39h 16m
2 stops
$726United Airlines
Sun, Nov 8 - Tue, Nov 10
United Airlines Logo
7:00 am - 10:15 am
BOI
-
LIS
20h 15m
2 stops
United Airlines Logo
1:00 pm - 7:16 pm
LIS
-
BOI
37h 16m
2 stops
$727United Airlines
Thu, Oct 1 - Thu, Nov 19
Delta Logo
10:35 am - 5:50 pm
BOI
-
LIS
24h 15m
2 stops
Delta Logo
5:00 am - 3:30 pm
LIS
-
BOI
17h 30m
2 stops
$847Delta
Sun, Nov 15 - Sun, Nov 29
United Airlines Logo
6:55 pm - 10:15 am
BOI
-
LIS
32h 20m
2 stops
United Airlines Logo
1:00 pm - 9:43 am
LIS
-
BOI
51h 43m
2 stops
$860United Airlines
Tue, Sep 8 - Sat, Sep 19
Scandinavian Airlines Logo
3:30 pm - 11:15 pm
BOI
-
LIS
24h 45m
2 stops
Scandinavian Airlines Logo
10:55 pm - 10:25 pm
LIS
-
BOI
30h 30m
2 stops
$889Scandinavian Airlines
Thu, Oct 15 - Sat, Oct 24
Delta Logo
4:05 pm - 5:50 pm
BOI
-
LIS
18h 45m
2 stops
Delta Logo
5:00 am - 6:33 pm
LIS
-
BOI
20h 33m
2 stops
$897Delta
Thu, Oct 8 - Thu, Oct 15
United Airlines Logo
5:00 am - 9:20 am
BOI
-
LIS
21h 20m
2 stops
United Airlines Logo
5:05 am - 5:58 pm
LIS
-
BOI
19h 53m
2 stops
$902United Airlines
Tue, Sep 15 - Tue, Sep 22
United Airlines Logo
7:05 pm - 9:20 am
BOI
-
LIS
31h 15m
2 stops
United Airlines Logo
11:25 am - 3:31 pm
LIS
-
BOI
35h 06m
2 stops
$906United Airlines
Mon, Jul 27 - Tue, Aug 11
Air Canada Logo
7:05 pm - 9:20 am
BOI
-
LIS
31h 15m
2 stops
Air Canada Logo
11:25 am - 5:58 pm
LIS
-
BOI
37h 33m
2 stops
$918Air Canada
Mon, Jul 27 - Tue, Aug 11
Air Canada Logo
5:46 pm - 9:20 am
BOI
-
LIS
32h 34m
2 stops
Air Canada Logo
11:25 am - 1:38 pm
LIS
-
BOI
33h 13m
2 stops
$933Air Canada
Booking Insights

KAYAK's insights & trends for Boise to Portugal flights

Get data-powered insights and trends into flights from Boise to Portugal to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Boise to Portugal?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boise to Portugal, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boise to Portugal is January, when tickets cost $0 (return) on average. On the other hand, the most expensive months are September and July, when the average cost of round-trip tickets is $1,029 and $923 respectively.

Good to know

Low seasonFebruary
Cheapest flight$520
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from Boise to Lisbon

FAQs - booking Portugal flights

  • How does KAYAK find such low prices on flights from Boise to Portugal?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boise to Portugal.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boise to Portugal?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Boise to Portugal is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boise to Portugal?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Boise to Portugal with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boise to Portugal?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Boise to Portugal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Boise to Portugal

 
Need help choosing which airline to fly with from Boise to Portugal? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
DeltaOverall score based on 8395 reviews
8.5Crew
7.2Food
8.1Boarding
7.8Entertainment
7.8Comfort
Airline reviews

Connection flights should be spaced out farther because too close I missed my connection.

8.0 ExcellentAnonymous, Jun 2026
PHL - ATL
Read more Delta reviews

Connection flights should be spaced out farther because too close I missed my connection.

Definitely a southern flavor. Cordiality was evident even though no drinks or snacks were served.

On time! There were plenty of airport employees who were able to keep us moving in the right direction. The crew on the plane were professional.

Left /arrived on time. Decent seat space. Like the wifi/plugs and entertainment. Windows and tray table were kinda gross. Attendants didn't start snack service til 40mins before landing. Two rows before us, captain came on to say there's turbulence and recalled staff to seats. So, no drink/snack. Later, attendants didn't stop to see if we had trash nor even look our way. Felt invisible! Almost all pilot announcements were not only unintelligible, but so quiet. We had no idea what she said.

Average seat comfort, a drink and chips were provided, early boarding because we checked a carryon at the gate was nice. Ticket pricing shenanigans, including fees to pick a seat, check a bag, and get food onboard - evidence the industry is reinvigorating last century’s strategies- destroys the experience before one ever arrives at the airport. It’s difficult to recognize any value or sustain loyalty in the end-to-end process making air travel more drudgery than pleasure.

Gate agent was unhelpful for handicapped boarding. Flight attendant seemed untrained.

No service flight that took 5 hrs and a stop at an unscheduled airport. Crew and pilots did their jobs

Clean planes and not take my comfort class seat away.

The crew were efficient. The pilots seemed professional. It was a bit chilly in our seats. The sheet provided weren’t very helpful.

Weather caused a long delay, but the efficiency and updates from the pilot were helpful. We were able to make our connection fortunately.

Even through the flight was delayed due to storms near IAH The flight was great! The crew was so hospitable and professional

I flew from Santa Fe to Denver to catch a flight to London and the transfer of my luggage on arrival at Denver to the London flight worked perfectly. The crew on the ground and on board for the London flight were so friendly and efficient.

Boarded early; and arrived home 40 mins early. After a long flight, it’s nice to be back home early. These flights have no amenities; no snacks. So need to bring your own

Boarded early, left early, arrived 40 mins early! A win win for me!

New plane was lovely. Crew customer service is always lax but expected. Kraft on time and arrived safely.

These airplanes should be illegal. The seats are two tight, it is a safety issue. Wheelchair support was ridiculously slow. We almost missed our flight.

It was a short flight so I was expecting too much

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

Flight was delayed but more than 90 minutes. This caused me to miss my available windows for pick-up by a friend. I had to pay $125 for an uber back home from the airport which was an added expense that I had not budgeted for my trip. Staff was friendly.

I felt scammed. The priced advertised was different than what I paid. I paid the whole some online. I then got a call 20 minutes later saying I need to paid 70 more person. She said the price online is not the guaranteed price.

Everything you need to know for your flight from Boise to Portugal

Information on your arrival and departure airports