$394 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 9/21. 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$833
Porto
Porto2 stops$827
Lisbon
Lisbon2 stops$833
Porto
Porto2 stops$827

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, May 5 - Tue, May 12
Delta Logo
3:44 pm - 5:50 pm
BOI
-
LIS
19h 06m
2 stops
Delta Logo
5:00 am - 10:28 pm
LIS
-
BOI
24h 28m
2 stops
$833Delta
Tue, May 12 - Tue, May 19
Delta Logo
3:14 pm - 5:50 pm
BOI
-
LIS
19h 36m
2 stops
Delta Logo
5:00 am - 11:55 pm
LIS
-
BOI
25h 55m
2 stops
$880Delta
Mon, Aug 10 - Tue, Aug 18
Multiple Airlines Logo
2:55 pm - 11:25 pm
BOI
-
LIS
25h 30m
2 stops
Multiple Airlines Logo
6:45 pm - 10:17 pm
LIS
-
BOI
34h 32m
2 stops
$923Multiple Airlines
Mon, Aug 10 - Tue, Aug 18
United Airlines Logo
7:05 pm - 10:30 am
BOI
-
LIS
32h 25m
2 stops
United Airlines Logo
11:25 am - 4:48 pm
LIS
-
BOI
60h 23m
3 stops
$955United Airlines
Tue, Sep 8 - Sat, Sep 19
Scandinavian Airlines Logo
10:23 am - 3:35 pm
BOI
-
LIS
22h 12m
2 stops
Scandinavian Airlines Logo
4:25 pm - 6:35 pm
LIS
-
BOI
33h 10m
2 stops
$1,000Scandinavian Airlines
Sun, Jun 7 - Tue, Jun 23
Air Canada Logo
10:41 am - 11:00 am
BOI
-
LIS
41h 19m
2 stops
Air Canada Logo
11:25 am - 4:44 pm
LIS
-
BOI
36h 19m
2 stops
$1,031Air Canada
Sun, May 3 - Sun, May 17
KLM Logo
3:44 pm - 6:45 pm
BOI
-
LIS
20h 01m
2 stops
KLM Logo
5:00 am - 5:50 pm
LIS
-
BOI
19h 50m
2 stops
$1,032KLM
Mon, Jun 1 - Wed, Jun 10
Delta Logo
3:14 pm - 5:50 pm
BOI
-
LIS
19h 36m
2 stops
Delta Logo
5:00 am - 7:13 pm
LIS
-
BOI
21h 13m
2 stops
$1,036Delta
Sat, Jun 6 - Wed, Jun 24
Delta Logo
6:41 pm - 10:45 am
BOI
-
LIS
33h 04m
2 stops
Delta Logo
5:00 am - 10:28 pm
LIS
-
BOI
24h 28m
2 stops
$1,049Delta
Wed, Jun 10 - Fri, Jun 26
Delta Logo
8:42 am - 5:50 pm
BOI
-
LIS
26h 08m
2 stops
Delta Logo
5:00 am - 11:55 pm
LIS
-
BOI
25h 55m
2 stops
$1,088Delta
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.

How long does a flight from Boise to Portugal take?

The duration of a flight to Portugal depends on your arrival airport. The shortest route to Portugal from Boise is to Lisbon, which takes 16h 32m.

Good to know

Low seasonFebruary
Cheapest flight$394
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 8404 reviews
7.8Entertainment
7.2Food
8.5Crew
8.1Boarding
7.9Comfort
Airline reviews

Boarding was good. The flight was on time ( arrival was 20 minutes early). Inflight service was average ( US airlines have not mastered the skills of customer service yet). The food was mediocre. “ breakfast “ was downright awful and insulting. It was a piece of dough with mon descript filling that was supposed to be cheese omelette).

6.0 GoodAnonymous, Apr 2026
DTW - AMS
Read more Delta reviews

Boarding was good. The flight was on time ( arrival was 20 minutes early). Inflight service was average ( US airlines have not mastered the skills of customer service yet). The food was mediocre. “ breakfast “ was downright awful and insulting. It was a piece of dough with mon descript filling that was supposed to be cheese omelette).

The tray table was broken and the food was terrible.

The gentleman at the gate I think his name is RIE was exceptional

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

No entertainment. Plane was so small had to pink tag a carry on ive used for 20 years easily on board. The fact the flight got in at midnight, had to wait for crew in fort wayne to allow the plane to approach the gate, THEN had to wait for bag on jet bridge made experience irritating at best.

Crew was great. Near on time departure and early arrival. Snacks are always meh. Not a fan of the "pay for everything including miles " proposal unless base flight rate going to be 100 bucks.

Would have been better if there was a nonstop flight from Tampa to Norfolk or Tampa to New Port News.

Overall Good! The weather delayed our takeoff from Atlanta and our arrival in Miami! If Mother Nature can mess up a flight she will do it every time!

The flight was smooth, the crew was great but the plane was quite old

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Packed in plane small uncomfortable seats elbow to elbow nobody wants to be in that situation for the money they paid

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

Overall flight was ok. Flight attendant was receptive to assisting passengers with tight connections.

Checking in united could not figure out my star alliance gold. Baggage did not get marked priority and didn't receive boarding passes. When got to SFO lounge personal fixed everything Immediately

Very comfortable flight, snacks and drinks were good, good communication from crew. Could have used a little more information on timing of boarding for group 5

It's a long flight and I would have liked better snacks between lunch and the arrival meal. It's fine to have fruit and nuts but I really don't like ramen because it's salty junk soup. I'd suggest sandwiches. They're not expensive nor are they hard to store for a long flight. The FA's had a couple of big services and they were super busy preparing, executing and then cleaning up. Then they disappeared.

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

This was the first flight in the morning. We boarded fine. The cabin door was closed and we were ready to go. We were notified by the Captain that ATC issued and ground stop for 40 minutes. So, without even pushing back from the gate, we were already 40 minutes late. We actually were released to push-back and taxi at 30 minutes. But, some passengers had tight connections and were not going to make their connections. Some passengers asked about the delay and the effect on the connections and were told by the cabin attendant that all flights will be delayed and so they should be OK. However, that was not true. My connecting flight was on time and I arrived at IAH with 21 minutes to make my connection. I did and I'm happy about that, but the flight crew should not have given assurances to the passengers who might have missed their connections.

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

Information on your arrival and departure airports