$387 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 9/22. 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$781
Porto
Porto2 stops$957
Lisbon
Lisbon2 stops$781
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

Wed, Apr 22 - Wed, May 6
American Airlines Logo
2:14 pm - 3:40 pm
BOI
-
LIS
18h 26m
2 stops
American Airlines Logo
6:35 am - 10:54 pm
LIS
-
BOI
23h 19m
2 stops
$781American Airlines
Mon, Apr 27 - Mon, May 4
Multiple Airlines Logo
1:29 pm - 3:45 pm
BOI
-
LIS
19h 16m
2 stops
Multiple Airlines Logo
4:35 pm - 10:38 pm
LIS
-
BOI
37h 03m
2 stops
$786Multiple Airlines
Wed, Apr 22 - Wed, May 6
Multiple Airlines Logo
8:11 am - 9:05 am
BOI
-
LIS
17h 54m
2 stops
Multiple Airlines Logo
6:35 am - 10:54 pm
LIS
-
BOI
23h 19m
2 stops
$791Multiple Airlines
Mon, May 4 - Mon, May 11
Multiple Airlines Logo
6:00 am - 11:25 pm
BOI
-
LIS
34h 25m
2 stops
Multiple Airlines Logo
8:45 pm - 10:38 pm
LIS
-
BOI
32h 53m
2 stops
$818Multiple Airlines
Mon, May 4 - Tue, May 12
American Airlines Logo
2:14 pm - 3:45 pm
BOI
-
LIS
18h 31m
2 stops
American Airlines Logo
6:35 am - 10:38 pm
LIS
-
BOI
23h 03m
2 stops
$828American Airlines
Wed, Apr 22 - Wed, May 13
Multiple Airlines Logo
3:44 pm - 5:50 pm
BOI
-
LIS
19h 06m
2 stops
Multiple Airlines Logo
5:00 am - 5:09 pm
LIS
-
BOI
19h 09m
2 stops
$832Multiple Airlines
Wed, Apr 22 - Wed, May 13
KLM Logo
3:23 pm - 6:45 pm
BOI
-
LIS
20h 22m
2 stops
KLM Logo
5:00 am - 5:09 pm
LIS
-
BOI
19h 09m
2 stops
$837KLM
Sun, May 3 - Tue, May 12
Multiple Airlines Logo
8:11 am - 9:05 am
BOI
-
LIS
17h 54m
2 stops
Multiple Airlines Logo
6:35 am - 10:38 pm
LIS
-
BOI
23h 03m
2 stops
$838Multiple Airlines
Wed, Oct 7 - Thu, Oct 15
Delta Logo
6:00 am - 5:50 pm
BOI
-
LIS
28h 50m
2 stops
Delta Logo
5:00 am - 11:08 pm
LIS
-
BOI
25h 08m
2 stops
$843Delta
Tue, May 5 - Wed, May 13
Finnair Logo
1:29 pm - 11:25 pm
BOI
-
LIS
26h 56m
2 stops
Finnair Logo
4:35 pm - 10:54 pm
LIS
-
BOI
37h 19m
2 stops
$845Finnair
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 ($863) and Finnair ($1,024).

Good to know

Low seasonFebruary
Cheapest flight$387
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 8399 reviews
7.8Entertainment
8.1Boarding
7.9Comfort
7.2Food
8.5Crew
Airline reviews

The crew bent over backwards to thank us for flying and make us comfortable. The food service was quick and efficient. The Captain communicated and said goodbye and thank you as we departed. They really stood out!

10.0 ExcellentKathryn, Apr 2026
JFK - LAX
Read more Delta reviews

The crew bent over backwards to thank us for flying and make us comfortable. The food service was quick and efficient. The Captain communicated and said goodbye and thank you as we departed. They really stood out!

Okay considering we had weather delays which the Pilot notified us of immediately!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

Flight from Fort Wayne to Atlanta was the smallest in terms of cabin space that I've ever seen. A carry on I've used for 20 years BARELY fit in overhead compartment. I'm 5'10" and felt very cramped. Not the best experience.

I am writing to express my dissatisfaction with the poor service and unprofessional staff we encountered when traveling with an infant. Our flight was delayed, and the gate staff failed to manage the boarding process appropriately. Due to incorrect, unavailable, or missing 'pink tag' stroller and car seat check-in procedures at the gate, we were forced to board last. Furthermore, the gate staff was rude and dismissive, causing significant distress to our infant. To make matters worse, one of our checked items—an infant sleeper/lounger—was returned to us broken. Given the unsafe handling of essential equipment and unprofessional treatment, I expect a prompt resolution regarding compensation for the damaged items.

We departed and landed early which was a nice surprise. The boarding process was slow.

N Everything was perfect from boarding to assistance to baggage in Tampa

Subpar. The seating on the plane is almost unbearable. We are literally touching and/or sitting on each other which is totally unacceptable and shameful. Pilots and crew was very accommodating and friendly.

The boarding was organized and informative but the plane was tight meaning that you were sitting on one another and extremely uncomfortable. It’s disappointing that can’t have common seating comfort on the plane.

Loved the crew! Sucks that we went from 1 hour and 8 minute layover to a 3 hour layover. But weather sucks like that.

Poor communication, flight was delayed for preventable reasons. I missed my connection.

It was better than excellent. The staff in Mason City were great. The young woman that pushed my wheelchair did more than could be expected of her. She came from India 17 years ago. I don't remember her name.

After arriving in Chicago, we were taxiing for 1.5 hours with infrequent and untruthful updates about the amount of time it would take to arrive at the gate. Minimally, the team could have provided timing expectations that were more truthful, especially one their original expectations were not met.

All good flight was 35 minutes early when arriving in Edinburgh

Flights were on time actually early service was good and crew cheerful

Every staff member was professional, friendly and courteous. The pizza twist was ok. It was warm but too much dough.

The boarding timing needs to be improved. The flight was delayed again because it took way too long to board. I was already exhausted from sleeping at the airport and spending all day there due to delay from my previous flight that connected in Chicago.

I had a terrible experience. My flight got delayed from Atlanta to Chicago on Monday April 6, 2026, and that led to me missing my next flight to Brussels. United Airlines didn’t provide me with any accommodation for shelter. I had to sleep at the airport in Chicago. The next flight I was put on didn’t leave until the evening hours of Tuesday 4/7/2026.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

Flight left on time, arrived early, pleasant staff provided water, coffee, etc. access to bathrooms was reasonable and were well maintained. blankets were available, lots of entertainment options. LUGGAGE SERVICE WAS GREAT. I got my one checked bag quickly and was able to make a bus connection for a 2 hour bus ride saving me from waiting another 1.5 hours.

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

Information on your arrival and departure airports