$527 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 6/1. 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$727
Porto
Porto2 stops$723
Lisbon
Lisbon2 stops$727
Porto
Porto2 stops$723

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 - 7:16 pm
LIS
-
BOI
37h 16m
2 stops
$727Air Canada
Mon, Nov 2 - Thu, Nov 5
United Airlines Logo
7:00 am - 8:10 am
BOI
-
LIS
18h 10m
2 stops
United Airlines Logo
1:00 pm - 11:59 pm
LIS
-
BOI
41h 59m
2 stops
$728United Airlines
Tue, Oct 20 - Tue, Nov 3
United Airlines Logo
5:00 am - 9:20 am
BOI
-
LIS
21h 20m
2 stops
United Airlines Logo
5:00 am - 11:05 pm
LIS
-
BOI
25h 05m
2 stops
$730United Airlines
Mon, Nov 2 - Wed, Nov 11
United Airlines Logo
7:00 am - 10:15 am
BOI
-
LIS
20h 15m
2 stops
United Airlines Logo
5:00 am - 11:59 pm
LIS
-
BOI
25h 59m
2 stops
$731United Airlines
Sat, Oct 31 - Thu, Nov 12
Air Canada Logo
6:55 pm - 11:00 am
BOI
-
LIS
34h 05m
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
Delta Logo
3:22 pm - 10:00 am
BOI
-
LIS
35h 38m
2 stops
Delta Logo
5:30 am - 11:08 pm
LIS
-
BOI
24h 38m
2 stops
$740Delta
Sat, Oct 31 - Mon, Nov 9
Delta Logo
5:45 pm - 8:00 am
BOI
-
LIS
32h 15m
2 stops
Delta Logo
12:20 pm - 4:49 pm
LIS
-
BOI
35h 29m
2 stops
$752Delta
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 July and September, when the average cost of round-trip tickets is $923 and $915 respectively.

Good to know

Low seasonFebruary
Cheapest flight$527
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
8.5Crew
7.8Entertainment
7.2Food
7.8Comfort
8.1Boarding
Airline reviews

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

10.0 ExcellentCharles, May 2026
DTW - DEN
Read more Delta reviews

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.

It was a pleasant surprise to have complimentary Wi-Fi on the flight

Much better than Latam, the worse airline company ever. I hope I don't have the need to fly Latam ever in my life again.

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

The flight was operated by Latam. The aircraft had a technical issue and the flight was delayed for the next day. They grounded other passengers to get their airplane assigned to my flight. Most of he ground staff don't speak English (Orlando Airport), but were very polite.The crew on the other hand could speak English and Portuguese. On board service was good.

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.

It's a short hop. My carryon was checked at the gate, I didn't have to drag it all over the airport. Excellent wheelchair assist.

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

Friendliest Flight Attendant I’ve seen since I flew on Southwest Airlines. The whole trip was outstanding…and arrived Early!

It was good overall except from Omaha to Denver when flight a was a repeatedly delayed apparently due to some issue at Denver. Communications could have been handled better. I had to board then deboard with luggage and board again

I didn’t have a seat assignment and my seat was very dirty on the flight from Frankfurt to Budapest.

Left an hour and a half after the listed time. Up side was it had TV screens on the seat.

No screens or meal options. Freezing cold. Dirty seats. Left late.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Cree was organized and pleasant. Plane had good seating but as it’s a shuttle toilets hadn’t been thoroughly cleaned (eg. bins too full)

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

Information on your arrival and departure airports