$297 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 4/13. 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$723
Lisbon
Lisbon2 stops$502
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

mar., abr. 14 - mar., abr. 28
Delta Logo
1:52 pm - 5:50 pm
BOI
-
LIS
20h 58m
2 stops
Delta Logo
5:00 am - 11:00 pm
LIS
-
BOI
25h 00m
2 stops
$502Delta
lun., abr. 20 - mié., abr. 29
Delta Logo
1:52 pm - 6:45 pm
BOI
-
LIS
21h 53m
2 stops
Delta Logo
5:00 am - 8:00 pm
LIS
-
BOI
22h 00m
2 stops
$506Delta
lun., abr. 20 - mié., abr. 29
Air France Logo
3:44 pm - 5:50 pm
BOI
-
LIS
19h 06m
2 stops
Air France Logo
9:50 am - 9:24 pm
LIS
-
BOI
18h 34m
2 stops
$508Air France
lun., abr. 20 - mié., abr. 29
Delta Logo
3:44 pm - 5:50 pm
BOI
-
LIS
19h 06m
2 stops
Delta Logo
5:00 am - 10:24 pm
LIS
-
BOI
24h 24m
2 stops
$521Delta
mar., abr. 14 - mar., abr. 28
KLM Logo
3:23 pm - 6:45 pm
BOI
-
LIS
20h 22m
2 stops
KLM Logo
9:20 am - 10:24 pm
LIS
-
BOI
20h 04m
2 stops
$594KLM
mar., abr. 14 - mar., abr. 28
KLM Logo
3:44 pm - 6:45 pm
BOI
-
LIS
20h 01m
2 stops
KLM Logo
9:20 am - 10:24 pm
LIS
-
BOI
20h 04m
2 stops
$615KLM
mar., abr. 14 - mar., abr. 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
$620Multiple Airlines
dom., abr. 19 - jue., abr. 30
United Airlines Logo
8:20 am - 10:45 pm
BOI
-
LIS
31h 25m
2 stops
United Airlines Logo
12:20 pm - 9:17 pm
LIS
-
BOI
39h 57m
2 stops
$622United Airlines
mar., abr. 14 - jue., jun. 4
Delta Logo
3:44 pm - 5:50 pm
BOI
-
LIS
19h 06m
2 stops
Delta Logo
5:00 am - 11:53 pm
LIS
-
BOI
25h 53m
2 stops
$659Delta
dom., abr. 19 - vie., jun. 5
Delta Logo
1:52 pm - 6:45 pm
BOI
-
LIS
21h 53m
2 stops
Delta Logo
5:00 am - 11:53 pm
LIS
-
BOI
25h 53m
2 stops
$664Delta
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 KLM ($594).

Good to know

Low seasonNovember
Cheapest flight$305
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 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 8245 reviews
7.9Comfort
7.8Entertainment
8.1Boarding
7.2Food
8.5Crew
Airline reviews

There’s not much to say about a one hour flight. This is a connection from LA to RNO that I missed the previous night due to a mechanical check delay on my originating flight from JFK to LAX. The short flight itself was fine. Instructions from the pilot and crew were per usual. The coffee was barely lukewarm, which possibly was purposeful so we would down it quickly. Bags were already on carousel upon reaching baggage claim, which was excellent.

10.0 ExcellentGrace, Feb 2026
JFK - LAX
Read more Delta reviews

There’s not much to say about a one hour flight. This is a connection from LA to RNO that I missed the previous night due to a mechanical check delay on my originating flight from JFK to LAX. The short flight itself was fine. Instructions from the pilot and crew were per usual. The coffee was barely lukewarm, which possibly was purposeful so we would down it quickly. Bags were already on carousel upon reaching baggage claim, which was excellent.

Flight was warm for first few hours and quite rough

Seat was extremely hard which made even a short 1 hour 20 minute flight fairly uncomfortable.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

The staff was fine. The plane was extremely tight, and I paid for the wifi and it did not work at all. I was actually going to ask for a refund.

two hour delay and the Delta representative on the PA system was unable to understand

An awesome flight crew. FC seat cushion just doesn’t cut it for a 3+ hour flight.

2+hrs delay without any reason provided and a cramped flight

We waited an hour on the runway to get a gate in Orlando

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

There was no WiFi available, there were mechanical problems with the plane and we landed at C 124, then the gate was switched to A 26, then all the way back to C126! For a 75 yo woman traveling alone, this was a difficult journey, indeed!

This trip did not start off well. The inbound flight was delayed about 20 minutes. Then, after initial onboarding, the passengers had to deplane due to a mechanical problem. That took about 30 minutes to fix and be cleared. Then, reboarding was chaotic. It took a long time to sort passengers and two passengers on standby were ticketed but there was no seat. So, they had to deplane. One of the flight crew was trying to help passengers figure out a place to put their carry-on bags and that took more time. In the end, our scheduled 10:30 am departure did not actually take off until about 12:05 pm CST. The flight itself was long but we got to Houston. Some passengers missed their connecting flights and had to rebook. Not the best of flights I've had.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Terrible because it was cancelled due to volcanic ash clouds in Guatemala while all other airlines kept flying. Had to pay for a hotel to stay overnight in Houston and try to fly next day.

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

We got delayed three hours and nobody thought to have the bathroom fixed while we were sitting waiting to board? took a full hour to have maintenance come and check it off. Had to shut the bathroom down twice so that the pilots could go to the bathroom. Everyone missed their connections.

Flight left on time and we arrived 25 minutes early! There was a gate available when we arrived so early on a busy Sunday afternoon! Flight attendants came around twice with the drinks cart.

Wonderful. Quick boarding. Early departure and we arrived 30 minutes early at our destination. Unfortunately, when you arrive early, there is still a departing aircraft at our gate. We had to park for 30 minutes until the gate was clear. So our early arrival was not really early at the gate. Otherwise it was a quick and smooth flight. Appreciated the efficiency.

Flight on time. Excellent service in Premium Economy. Great food served and cleaned up promptly. Unfortunately the climate control was malfunctioning and it was very cold and felt a bit like camping. Cold helps with sleep though so not complaining too much. Slept well. It asks to rate "entertainment". I do not like any IFE, don't shove a big screen in my face—I have my own phone if I want it. So this will always get low ratings.

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

Information on your arrival and departure airports