$408 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 2/25. 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$502
Porto
Porto2 stops$738
Lisbon
Lisbon2 stops$502
Porto
Porto2 stops$738

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

Tue, Apr 14 - Tue, Apr 28
Delta Logo
3:44 pm - 5:50 pm
BOI
-
LIS
19h 06m
2 stops
Delta Logo
5:00 am - 11:00 pm
LIS
-
BOI
25h 00m
2 stops
$502Delta
Tue, Apr 14 - Tue, Apr 28
Multiple Airlines Logo
1:41 pm - 11:25 pm
BOI
-
LIS
26h 44m
2 stops
Multiple Airlines Logo
4:35 pm - 10:54 pm
LIS
-
BOI
37h 19m
2 stops
$505Multiple Airlines
Mon, Mar 2 - Wed, Mar 18
United Airlines Logo
6:55 pm - 10:15 am
BOI
-
LIS
32h 20m
2 stops
United Airlines Logo
5:00 am - 11:57 pm
LIS
-
BOI
24h 57m
2 stops
$552United Airlines
Mon, Mar 2 - Wed, Mar 18
Delta Logo
10:45 am - 9:00 am
BOI
-
LIS
15h 15m
2 stops
Delta Logo
5:00 am - 6:43 pm
LIS
-
BOI
19h 43m
2 stops
$555Delta
Mon, Mar 2 - Wed, Mar 18
United Airlines Logo
6:55 pm - 10:15 am
BOI
-
LIS
32h 20m
3 stops
United Airlines Logo
11:55 am - 11:57 pm
LIS
-
BOI
42h 02m
2 stops
$564United Airlines
Mon, Mar 2 - Wed, Mar 18
KLM Logo
10:45 am - 9:00 am
BOI
-
LIS
15h 15m
2 stops
KLM Logo
5:00 am - 9:01 pm
LIS
-
BOI
22h 01m
2 stops
$568KLM
Wed, Apr 22 - Wed, May 13
Multiple Airlines Logo
1:51 pm - 11:25 pm
BOI
-
LIS
26h 34m
2 stops
Multiple Airlines Logo
6:35 am - 10:54 pm
LIS
-
BOI
23h 19m
2 stops
$589Multiple Airlines
Wed, Mar 4 - Wed, Mar 11
Multiple Airlines Logo
10:45 am - 11:20 am
BOI
-
LIS
17h 35m
2 stops
Multiple Airlines Logo
5:00 am - 9:00 pm
LIS
-
BOI
22h 00m
2 stops
$596Multiple Airlines
Wed, Mar 4 - Wed, Mar 11
Multiple Airlines Logo
10:45 am - 11:20 am
BOI
-
LIS
17h 35m
2 stops
Multiple Airlines Logo
5:00 am - 9:00 pm
LIS
-
BOI
22h 00m
2 stops
$623Multiple Airlines
Tue, Mar 31 - Tue, Apr 7
Delta Logo
4:40 pm - 5:50 pm
BOI
-
LIS
18h 10m
2 stops
Delta Logo
5:00 am - 4:03 pm
LIS
-
BOI
18h 03m
2 stops
$661Delta
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 ($502) and United Airlines ($552).

Good to know

Low seasonNovember
Cheapest flight$349
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 29% 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 3 airlines serving 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 8205 reviews
7.2Food
8.1Boarding
8.5Crew
7.9Comfort
7.8Entertainment
Airline reviews

Delta flights recently are always delayed AND at jfk tney get the gates further away (need To walk 20’ to get to them/all the way at the end of the terminal). Not sure whats happening but price doesnt match experience!

2.0 MediocreDimitrios, Feb 2026
JFK - DFW
Read more Delta reviews

Delta flights recently are always delayed AND at jfk tney get the gates further away (need To walk 20’ to get to them/all the way at the end of the terminal). Not sure whats happening but price doesnt match experience!

Everything I mentioned earlier - the airbus was more comfortable indeed and the experience was further enhanced.

Delta continues to set the benchmark for traveler-friendly service with minimal disruption and clear communication within the mainland US (coast to coast). I am consistently pleased to be a Delta customer, and this experience once again met my expectations. There was a brief delay departing from MIA due to a technical issue that required the aircraft to return to the gate. However, the situation was handled professionally and transparently. Fortunately, my planned layover allowed ample buffer time, so the adjustment caused no stress. Overall, another smooth and reassuring experience.

Good experience and the flight landed early. There was no food I had or entertainment.

Flight was delayed and no reasons provided. After the passengers were boarded, the crew made announcement that the captain has jot arrived and he would take another 15 mins. All passengers patiently sat until the captain came and started. Terrible experience!

Flight was delayed. No information on why it was delayed. After we boarded the flight, , the crew made announcement that the captain hs not arrived and he will take 15 mins more to arrive. Passengers were just sitting patiently for the captain to arrive and start, Terrible experience.

Totally worth the miles to upgrade to Delta Comfort. Plenty of legroom.

This was my first time flying Delta ever and I had a great experience!

Smallest leg room I've ever had on a plane.

They took all carry-on luggage from Groups 6 -9 - I was group 5 and waiting in line to board - they made me check my luggage too. That then went to baggage claim and delayed departure from the airport. There was overhead room in my seating area - Delta over reacted. Also, had a gentleman next to me that took up 1/2 my seat.

Entertainment kept turning itself off. Gave up on watching a movie.

Both the WIFI and entertainment did not work for 2.5h

The crew made our experience extremely bad. They were rude and didn’t have anything for kids.

Very old flight - time to retire it for newer airplanes

2+ hours delayed Outlet in row 12 did not work Tv monitors did not work Lights kept off the entire flight for at 5pm-7pm flight

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Do not like the size of the overhead bin. I think staff should monitor the size of suitcases that are being carried on by passengers to ensure they meet the size requirement.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Both of my flights arrived early and check in process was smooth

The last 3 hours it was freezing cold in row 56. Multiple people had their winter coats on and were utilizing the blankets provided by the airline. I also did not have easy access to figure out how to book my food allergy and advance for my meals. Most of everything I received was something I couldn't eat. This needs to be made more accessible. Also, I'm 5'10 which is the average height of the American male. I flew from Philadelphia to Toronto and then to Tokyo and the seats were absolutely unbearable. For that long of a flight it is impossible to get comfortable when doing anything. Flights need to have more space and stop prioritizing costs over people.

Again, we were rerouted all the way to Zurich and had a longer journey than expected.

Was delayed at every point/ connection. Luggages missing for 5days. Had no medications for diabetes and high B/p. when bags where finally delivered on the 30th, the insulin and ozempic were no longer patent, as the ice pack had since dissolved and the authenticity of the med is now questionable, since they must be refrigerated. Please have them refund my bag fees. I should sue them for all the inconveniences caused to me.

The plane was delayed substantially due to a mechanical problem, that being said, the airline was very fair with providing a meal coupon for us. I would rather arrive late on a mechanically sound plane than the alternative. The food served in the plane was just awful, however and I recommend a new catering company.

I waiting for 2 hrs to retrieve my luggage. Didn't get home till 3am.

The flight left late and I didn’t get a glass of bubbly upon boarding (which I’m used to when booking business class on other flights), but otherwise it was a pleasant flight with lovely, helpful crew members and I enjoyed my meal.

Flight cancellations, delays, mass confusion and disorganization! That’s Air Canada for you, nothing new. I would have chosen a different airline if it were an option, and Air Canada continues to prove they don’t care about their customers.

everything was fine. but paying for 1 piece of check-in luggage and denying passengers to board with carry-on luggage which by air line's standards does not fit is not acceptable. when one travels for a longer time one needs to have some essentials

Couldn't fit knees, only 1 toilet working, didn't get anything to drink cause the stewards were not able to get to us

Flight was canceled for a reason they knew hours before but did not mention. Next the gate chnage from 37 to 38 at least 10 times. Ridiculous.

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

Information on your arrival and departure airports