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Cheap flights from Idaho to Portugal from $349

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho to Portugal departing on 2/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Idaho to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
10:41 am - 5:50 pm
BOI
-
LIS
24h 09m
2 stops
Delta Logo
5:00 am - 11:00 pm
LIS
-
BOI
25h 00m
2 stops
$502Delta
tis, apr 14 - tis, apr 28
Delta Logo
3:30 pm - 5:50 pm
GEG
-
LIS
18h 20m
2 stops
Delta Logo
5:00 am - 9:40 pm
LIS
-
GEG
24h 40m
2 stops
$502Delta
tis, apr 14 - tis, apr 28
American Airlines Logo
1:25 pm - 5:55 pm
JAC
-
LIS
21h 30m
2 stops
American Airlines Logo
8:25 am - 12:41 pm
LIS
-
JAC
35h 16m
2 stops
$503American Airlines
tis, apr 21 - tis, apr 28
Multiple Airlines Logo
5:51 am - 11:25 pm
BOI
-
LIS
34h 34m
2 stops
Multiple Airlines Logo
4:35 pm - 10:54 pm
LIS
-
BOI
37h 19m
2 stops
$505Multiple Airlines
tis, apr 14 - tis, apr 28
Iberia Logo
6:00 am - 11:25 pm
GEG
-
LIS
33h 25m
2 stops
Iberia Logo
6:35 am - 8:33 pm
LIS
-
GEG
21h 58m
2 stops
$509Iberia
fre, apr 24 - lör, maj 9
United Airlines Logo
1:46 pm - 3:35 pm
GEG
-
LIS
41h 49m
2 stops
United Airlines Logo
7:25 am - 11:43 am
LIS
-
GEG
36h 18m
2 stops
$517United Airlines
mån, apr 6 - fre, apr 24
Delta Logo
10:40 pm - 8:00 am
GEG
-
LIS
26h 20m
2 stops
Delta Logo
12:15 pm - 4:08 pm
LIS
-
GEG
35h 53m
2 stops
$522Delta
mån, mar 16 - mån, mar 30
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
mån, mar 2 - ons, 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
$555KLM
mån, mar 2 - ons, mar 18
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
ons, apr 22 - ons, maj 13

KLM flights from Idaho to Portugal

Our best KLM deals on Idaho to Portugal flight tickets
KLM
Mar 2
BOI10:45 amBoise Air Term. Gowen Fld
15h 15m
2 stops
LIS9:00 amLisbon Humberto Delgado
Mar 18
LIS5:00 amLisbon Humberto Delgado
22h 01m
2 stops
BOI9:01 pmBoise Air Term. Gowen Fld
$555
KLM
Apr 2
GEG3:25 pmSpokane
19h 15m
2 stops
FAO6:40 pmFaro
Apr 8
FAO8:10 amFaro
18h 55m
2 stops
GEG7:05 pmSpokane
$777

Finnair flights from Idaho to Portugal

Our best Finnair deals on Idaho to Portugal flight tickets
Finnair
Mar 2
BOI7:00 amBoise Air Term. Gowen Fld
25h 25m
2 stops
LIS3:25 pmLisbon Humberto Delgado
Mar 18
LIS4:10 pmLisbon Humberto Delgado
36h 13m
2 stops
BOI10:23 pmBoise Air Term. Gowen Fld
$783
Finnair
Aug 2
BOI2:58 pmBoise Air Term. Gowen Fld
25h 27m
2 stops
LIS11:25 pmLisbon Humberto Delgado
Aug 8
LIS6:55 pmLisbon Humberto Delgado
33h 45m
2 stops
BOI9:40 pmBoise Air Term. Gowen Fld
$1,253

momondo Fare Finder

 
Customize your flight search to find flights from Idaho to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated februari 15, 2026.
Use the filters below to find and compare flights from Idaho to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

tis 4/14

10:41 am-5:50 pm

2 stops24h 09m

Lisbon Humberto Delgado

tis 4/28

5:00 am-11:00 pm

2 stops25h 00m

$502

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

tis 4/14

3:30 pm-5:50 pm

2 stops18h 20m

Lisbon Humberto Delgado

tis 4/28

5:00 am-9:40 pm

2 stops24h 40m

$502

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

tis 4/21

1:25 pm-5:55 pm

2 stops21h 30m

Lisbon Humberto Delgado

tis 4/28

8:25 am-12:41 pm

2 stops35h 16m

$503

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

tis 4/14

5:51 am-11:25 pm

2 stops34h 34m

Lisbon Humberto Delgado

tis 4/28

4:35 pm-10:54 pm

2 stops37h 19m

$505

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

fre 4/24

6:00 am-11:25 pm

2 stops33h 25m

Lisbon Humberto Delgado

lör 5/9

6:35 am-8:33 pm

2 stops21h 58m

$509

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

mån 4/6

1:46 pm-3:35 pm

2 stops41h 49m

Lisbon Humberto Delgado

fre 4/24

7:25 am-11:43 am

2 stops36h 18m

$517

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

mån 3/16

10:40 pm-8:00 am

2 stops26h 20m

Lisbon Humberto Delgado

mån 3/30

12:15 pm-4:08 pm

2 stops35h 53m

$522

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

mån 3/2

6:55 pm-10:15 am

2 stops32h 20m

Lisbon Humberto Delgado

ons 3/18

5:00 am-11:57 pm

2 stops24h 57m

$552

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

mån 3/2

10:45 am-9:00 am

2 stops15h 15m

Lisbon Humberto Delgado

ons 3/18

5:00 am-9:01 pm

2 stops22h 01m

$555

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

ons 4/22

1:51 pm-11:25 pm

2 stops26h 34m

Lisbon Humberto Delgado

ons 5/13

6:35 am-10:54 pm

2 stops23h 19m

$589

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Portugal from

How to get the cheapest flight ticket from Idaho to Portugal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Idaho to Portugal?

United Airlines, Icelandair, and Air Canada are the most popular carriers operating from Idaho to Portugal

What airlines fly to Portugal?

United Airlines, Delta and Air Canada are the top three most popular airlines that fly to Portugal from Idaho according to our data. United Airlines is the first choice among our users, with 60% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 3 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

Cheap Idaho to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho to Portugal

Fastest flight time

16h 45m

Direct flights

None
The fastest flight from Idaho to Portugal takes 16h 45m
There are no direct flights from Idaho to Portugal. There are no popular flight routes from Idaho to Portugal.
Search flight deals

  • When did momondo last update prices for flights from Idaho to Portugal?

    Prices for flights from Idaho to Portugal refresh daily.

  • How many operators does momondo search for flights from Idaho to Portugal?

  • How old do you have to be to fly from Idaho to Portugal?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The necessary travel and health documents for your Portugal trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Idaho to Portugal

Compare and see reviews for airlines that fly from Idaho to Portugal with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $549Free CancellationRating
7.9
8,205 reviews
Search Delta flights
United AirlinesPriceFrom $589Free CancellationRating
7.4
9,296 reviews
Search United Airlines flights
Air CanadaPriceFrom $602Free CancellationRating
7.1
10,718 reviews
Search Air Canada flights

Why use momondo?

Why should I use momondo to find a flight deal from Idaho to Portugal?

Finding the right flight to Portugal from Idaho is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Portugal quick and easy, saving you time and money.

Can I find flights from Idaho to Portugal with flexible booking policies on momondo?

momondo does allow users to show only those flights to Portugal from Idaho which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Idaho to Portugal?

Once all potential Idaho to Portugal flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Idaho to Portugal right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Portugal from Idaho. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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1 adult
tis 3/17
tis 3/24
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