$497 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 9/6. 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$725
Porto
Porto2 stops$957
Lisbon
Lisbon2 stops$725
Porto
Porto2 stops$957

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

Sun, Oct 18 - Tue, Nov 3
Finnair Logo
6:44 am - 3:50 pm
BOI
-
LIS
26h 06m
2 stops
Finnair Logo
4:10 pm - 10:03 pm
LIS
-
BOI
36h 53m
2 stops
$725Finnair
Sun, Oct 18 - Tue, Nov 3
Delta Logo
5:40 am - 2:35 pm
BOI
-
LIS
25h 55m
2 stops
Delta Logo
5:00 am - 11:55 pm
LIS
-
BOI
25h 55m
2 stops
$726Delta
Sun, Oct 18 - Mon, Nov 2
Delta Logo
2:35 pm - 5:50 pm
BOI
-
LIS
20h 15m
2 stops
Delta Logo
5:30 am - 11:52 pm
LIS
-
BOI
25h 22m
2 stops
$729Delta
Sun, Oct 18 - Sun, Nov 1
Delta Logo
11:30 pm - 8:00 am
BOI
-
LIS
25h 30m
2 stops
Delta Logo
11:15 am - 11:55 pm
LIS
-
BOI
19h 40m
2 stops
$732Delta
Mon, Oct 19 - Wed, Oct 28
United Airlines Logo
6:25 am - 9:20 am
BOI
-
LIS
19h 55m
2 stops
United Airlines Logo
1:00 pm - 5:55 pm
LIS
-
BOI
34h 55m
2 stops
$783United Airlines
Tue, Oct 20 - Fri, Oct 30
Multiple Airlines Logo
1:15 pm - 2:55 pm
BOI
-
LIS
18h 40m
2 stops
Multiple Airlines Logo
11:25 am - 11:55 pm
LIS
-
BOI
18h 30m
2 stops
$784Multiple Airlines
Mon, Oct 19 - Thu, Oct 29
United Airlines Logo
6:25 am - 9:20 am
BOI
-
LIS
19h 55m
2 stops
United Airlines Logo
5:00 am - 9:15 pm
LIS
-
BOI
22h 15m
2 stops
$787United Airlines
Sun, Oct 18 - Fri, Oct 30
Delta Logo
5:40 am - 2:35 pm
BOI
-
LIS
25h 55m
2 stops
Delta Logo
11:25 am - 11:55 pm
LIS
-
BOI
18h 30m
2 stops
$789Delta
Sun, Oct 18 - Thu, Oct 29
Delta Logo
8:40 am - 11:15 am
BOI
-
LIS
19h 35m
2 stops
Delta Logo
5:30 am - 6:33 pm
LIS
-
BOI
19h 03m
2 stops
$791Delta
Sun, Oct 18 - Sat, Oct 31
Delta Logo
8:40 am - 11:15 am
BOI
-
LIS
19h 35m
2 stops
Delta Logo
12:20 pm - 9:17 pm
LIS
-
BOI
38h 57m
2 stops
$817Delta
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.

Which airlines provide the cheapest flights from Boise to Portugal?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Boise to Portugal were found on Delta ($726) and United Airlines ($783).

Good to know

Low seasonFebruary
Cheapest flight$497
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly and prices are also 41% lower on average.
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.
7.9
DeltaOverall score based on 8438 reviews
8.1Boarding
8.5Crew
7.8Entertainment
7.9Comfort
7.2Food
Airline reviews

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

4.0 OkayLifia, Apr 2026
BOS - SEA
Read more Delta reviews

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

Everything was great. The only issue is unfixable. Seats are too small. 😁🤪

This wasn't my experience with Delta. It was just the Pegasus flight. Seats were very hard. Staff was kinda rough. Not very nice. Charged me for snacks. For a 4 hour flight I would've expected more.

Crew was nice, meal was good. Entertainment had to be rebooted 3 times and still did not work. Turns out there was residue on screen, it needed to be cleaned to prevent the touchscreen buttons from continuously activating. I had entertainment for the last 45 minutes of a 5 hour 45 minute flight. Really unacceptable for first class. Flight attendent indicated your cleaning solution creates this problem. Seems as if this is widely known, you should be using a different product or cleaning better. Really really disappointing which simply added to the wi fi on your planes with reliably never ever works.

The baggage belt was not updated on the Delta App and was displayed on the wrong belt board. Was not expecting this to happen.

The plan was delayed and left DC 90 minutes late. However, it showed a 20 minute delay on the delta app, then a 12 min delay. It turned out to be an hour delay. I found out where the plane was with flightaware. Stop keeping customers in the dark about what is going on.

Everything went smoothly, although the usual gripes about airline travel were still present: the boarding process is inefficient, the snack selection is limited, and so on. Since there was extra space on the flight, the gate agent rearranged many people's seats to put people on the aisles and windows, leaving the middle seats empty, as much as possible, which was pretty great.

Landed without a gate ready. Plane is extremely old and dirty.

All the amenities was wonderful, if they could keep their prices that low. I'd fly with them all the time.

Very old plane with no inflight entertainment. I purchased the internet pass and it was nearly unusable.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The crew was great. Very friendly and responsive. The plane was old, small and tight. We ran out of overhead space and I had to check. Middle seat was particularly tight.

Flight itself excellent, but delayed so missed connection & got to destination 2 hrs later

The flight crew on this leg of my trip was very friendly and pleasant. Every one of them was humorous, as well as helpful and accommodating. This group was BY FAR the best crew I’ve flown with. They deserve kudos.

boarded early to only find out that flight would sit at gate for 45 min to an hour. Landed in chicago and sat on runway for over an hour before got to gate. Total delay was extensive for a 45 min flight door to door.

The flight was delayed from take off because only one runway was operational in San Francisco.

Several missed and almost missed connections. It felt like everything was being patched together last minute without enough resources and it ended up being an extremely stressful experience that basically ruined our weekend on the west coast. What a waste.

Really hard landing... as in slammed into the runway then hit the brakes really hard ...

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

Information on your arrival and departure airports