$460 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 7/12. 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$724
Lisbon
Lisbon2 stops$726
Porto
Porto2 stops$724

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 19 - Tue, Nov 3
Air Canada Logo
7:05 pm - 9:20 am
BOI
-
LIS
31h 15m
2 stops
Air Canada Logo
1:00 pm - 4:49 pm
LIS
-
BOI
34h 49m
2 stops
$726Air Canada
Mon, Oct 19 - Tue, Nov 3
Air Canada Logo
7:05 pm - 9:20 am
BOI
-
LIS
31h 15m
2 stops
Air Canada Logo
1:00 pm - 7:16 pm
LIS
-
BOI
37h 16m
2 stops
$727Air Canada
Mon, Nov 2 - Thu, Nov 5
United Airlines Logo
7:00 am - 10:15 am
BOI
-
LIS
20h 15m
2 stops
United Airlines Logo
1:00 pm - 11:05 pm
LIS
-
BOI
41h 05m
2 stops
$728United Airlines
Sun, Oct 18 - Tue, Nov 3
United Airlines Logo
6:25 am - 8:20 am
BOI
-
LIS
18h 55m
2 stops
United Airlines Logo
5:00 am - 11:59 pm
LIS
-
BOI
25h 59m
2 stops
$730United Airlines
Sat, Oct 24 - Tue, Nov 3
Air Canada Logo
7:05 pm - 11:00 am
BOI
-
LIS
33h 55m
2 stops
Air Canada Logo
1:00 pm - 5:55 pm
LIS
-
BOI
35h 55m
2 stops
$731Air Canada
Sat, Oct 24 - Tue, Nov 3
Air Canada Logo
7:05 pm - 11:00 am
BOI
-
LIS
33h 55m
2 stops
Air Canada Logo
1:00 pm - 7:16 pm
LIS
-
BOI
37h 16m
2 stops
$732Air Canada
Sat, Oct 24 - Tue, Nov 3
Air Canada Logo
5:44 pm - 12:00 pm
BOI
-
LIS
35h 16m
2 stops
Air Canada Logo
1:00 pm - 7:16 pm
LIS
-
BOI
37h 16m
2 stops
$736Air Canada
Sun, Oct 18 - Mon, Nov 2
Delta Logo
10:38 am - 11:15 am
BOI
-
LIS
17h 37m
2 stops
Delta Logo
12:20 pm - 3:30 pm
LIS
-
BOI
34h 10m
2 stops
$753Delta
Sat, Oct 24 - Mon, Nov 2
Delta Logo
5:45 pm - 10:00 am
BOI
-
LIS
33h 15m
2 stops
Delta Logo
12:20 pm - 3:30 pm
LIS
-
BOI
34h 10m
2 stops
$764Delta
Fri, Oct 23 - Tue, Nov 3
Air Canada Logo
8:15 am - 9:20 am
BOI
-
LIS
18h 05m
2 stops
Air Canada Logo
1:00 pm - 5:55 pm
LIS
-
BOI
35h 55m
2 stops
$777Air 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$460
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.
7.9
DeltaOverall score based on 8454 reviews
7.2Food
7.8Comfort
8.5Crew
8.1Boarding
7.8Entertainment
Airline reviews

I continue to be satisfied with Delta’s excellent service out of LGA. The digit id works well and gets me through security in no time. Whenever possible, I choose Delta.

10.0 Excellentangela, May 2026
LGA - PBI
Read more Delta reviews

I continue to be satisfied with Delta’s excellent service out of LGA. The digit id works well and gets me through security in no time. Whenever possible, I choose Delta.

Was revoked with Jet Blue due to delay from Kenya Air

The Boarding process was great. Particularly since my wife and I require assistance. The flight attendants were amazing. We travel frequently; they honestly were a cut above. 😀

Enjoyed it very much. Especially liked the free WiFi that Delta offers.

Smooth flight. Left on time, and got in 15 minutes early. Onboard video was great

For some reason, TSA Atlanta didn’t have my bag on the flight on time and they don’t have to provide Delta a reason for that.

WiFi didn’t work on two of four planes. Flight attendants were not overly friendly or welcoming. Planes were extremely slow to board and deplane.

Delta does a great job with entertainment and free wifi. I can still be in touch with my colleagues while in the air.

Aside from a completely packed plane, I really have no complaints.

Bus to plane was delayed for no apparent reason and our luggage was still on the belt when they shut it off. Took about 20 minutes to turn it back on to get our luggage.

First class ticket gets you no seat back entertainment? I have to bring my own laptop to see a movie? And most of their movies have ADS? No thank you. Worse: Tiny snacks only on a 2 hr flight?

Late- that’s what United does best. Missed my connection, rebooked to a flight 17 hours later and had to spend $500 on a hotel. What did I get? A $15 meal voucher. What can you get in an airport for $15. I hate United so much.

OK, I don’t expect much from coach class. Everything basically is pretty lousy. But at least I expect my bloody luggage to get from A to B. Tap Airlines lost my luggage and it has been more than 24 hours in Lisbon and they still have not located my luggage. On top of that, they are incredibly unhelpful. They feel actually dismissive. This lousy customer service.

Late plane. Only one crew on the ground so we b had to wait for Denver flight to come in, board, and depart. At 78 yrs of age I was not pleased trying to get my connection. What really made me angry was the notification you sent me to hurry up or I would miss my connection. Why tell me to hurry up when you got me in late. It was not a good way of treating customers.

No complaints other than luggage carousel was incorrectly guiding passengers to the wrong carousel on the screen.

Did not like that we couldn't complete check in on-line without providing pictures of our passports. Worry about identity theft. We had no delays and boarding was handled In an efficient manner.

We were a little disappointed to not be able to complete check in online without uploading pics of passports. Also we have KTN's and they weren't on our boarding passes when we got to security. Had to trek back to counter to have them fix.

Excellent service in Polaris class IAD to ZRH. Arrived rested and well fed after the overnight flight.

My flight time was changed without any notification to me which ruined my time sensitive plans so I ended up completely changing my travel plans and no reimbursement.

Excellent! I got to Munich and was transferred to my Lufthansa flight quickly, in 15 to 20 minutes, so I did not miss my flight. However, I had checked my overhead bag at the boarding gate in Tampa. That got to Tunis the next day. That is to be expected.

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

Information on your arrival and departure airports