What is the cheapest airline that flies from Idaho to Lisbon Humberto Delgado?

United Airlines is the most popular carrier operating from Idaho to Lisbon Humberto Delgado

What airlines fly to Lisbon?

United Airlines, Delta and Air Canada are the top three most popular airlines that fly to Lisbon from Idaho according to our data. United Airlines is the first choice among our users, with 54% of people opting to fly with this airline when traveling to Lisbon. Keep in mind that there are 4 different airlines that fly to Lisbon on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Idaho to Lisbon Humberto Delgado Airport?

Prices for flights from Idaho to Lisbon Humberto Delgado Airport refresh daily.

How many operators does momondo search for flights from Idaho to Lisbon Humberto Delgado Airport?

The number of operators available for flights from Idaho to Lisbon Humberto Delgado Airport is 4 as of December 2025.

How old do you have to be to fly from Idaho to Lisbon Humberto Delgado Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to Lisbon Humberto Delgado Airport.

What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?

The travel and health documents required for your trip to Lisbon Humberto Delgado Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lisbon Humberto Delgado Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$324 Cheap Flights from Idaho to Lisbon in 2025/26

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Find the cheapest flights from Idaho to Lisbon

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 9:20 am

GEG

LIS

42h 20m2 stops

10:50 am - 9:07 pm

LIS

GEG

42h 17m2 stops

$494United Airlines

Mon, Feb 16 - Sun, Feb 22

6:10 am - 8:10 am

BOI

LIS

19h 00m2 stops

11:20 am - 7:51 pm

LIS

BOI

39h 31m2 stops

$495United Airlines

Fri, Jan 23 - Fri, Jan 30

5:00 am - 8:10 am

GEG

LIS

19h 10m2 stops

11:20 am - 9:22 pm

LIS

GEG

42h 02m2 stops

$495United Airlines

Tue, Jan 27 - Wed, Feb 4

6:10 am - 9:20 am

BOI

LIS

20h 10m2 stops

11:20 am - 1:35 pm

LIS

BOI

33h 15m2 stops

$497Air Canada

Fri, Jan 23 - Fri, Jan 30

7:00 am - 9:20 am

GEG

LIS

42h 20m2 stops

5:00 am - 9:07 pm

LIS

GEG

24h 07m2 stops

$498United Airlines

Mon, Feb 23 - Sun, Mar 1

7:00 am - 8:10 am

JAC

LIS

18h 10m2 stops

5:00 am - 9:55 am

LIS

JAC

35h 55m2 stops

$499United Airlines

Fri, Jan 23 - Tue, Jan 27

5:30 am - 10:45 am

BOI

LIS

22h 15m2 stops

5:00 am - 4:15 pm

LIS

BOI

18h 15m2 stops

$500Delta

Sat, Apr 11 - Tue, Apr 21

9:15 am - 3:10 pm

BOI

LIS

22h 55m2 stops

5:00 am - 6:28 pm

LIS

BOI

20h 28m2 stops

$501Delta

Fri, Jan 23 - Tue, Jan 27

9:55 am - 3:10 pm

GEG

LIS

21h 15m2 stops

5:00 am - 2:55 pm

LIS

GEG

17h 55m2 stops

$501Multiple Airlines

Tue, Jan 27 - Wed, Feb 4

6:00 am - 8:00 am

GEG

LIS

18h 00m2 stops

8:55 am - 9:04 pm

LIS

GEG

20h 09m2 stops

$590Multiple Airlines

Fri, Apr 24 - Sat, May 9

United Airlines flights from Idaho to Lisbon

Our best United Airlines deals on Idaho to Lisbon flight tickets

United Airlines

Jan 23

BOI6:10 amBoise Air Term. Gowen Fld

19h 00m

2 stops

LIS8:10 amLisbon Humberto Delgado

Jan 30

LIS11:20 amLisbon Humberto Delgado

39h 31m

2 stops

BOI7:51 pmBoise Air Term. Gowen Fld

$495

Find similar

United Airlines

Jan 23

JAC7:00 amJackson Hole

18h 10m

2 stops

LIS8:10 amLisbon Humberto Delgado

Jan 27

LIS5:00 amLisbon Humberto Delgado

35h 55m

2 stops

JAC9:55 amJackson Hole

$499

Find similar

United Airlines

Apr 24

GEG7:10 amSpokane

30h 45m

2 stops

LIS9:55 pmLisbon Humberto Delgado

May 9

LIS11:25 amLisbon Humberto Delgado

42h 10m

2 stops

GEG9:35 pmSpokane

$530

Find similar

Air Canada flights from Idaho to Lisbon

Our best Air Canada deals on Idaho to Lisbon flight tickets

Air Canada

Jan 23

BOI6:10 amBoise Air Term. Gowen Fld

20h 10m

2 stops

LIS9:20 amLisbon Humberto Delgado

Jan 30

LIS11:20 amLisbon Humberto Delgado

33h 15m

2 stops

BOI1:35 pmBoise Air Term. Gowen Fld

$497

Find similar

Air Canada

Jan 15

BOI6:10 amBoise Air Term. Gowen Fld

20h 10m

2 stops

LIS9:20 amLisbon Humberto Delgado

Jan 21

LIS11:20 amLisbon Humberto Delgado

42h 37m

2 stops

BOI10:57 pmBoise Air Term. Gowen Fld

$609

Find similar

Air Canada

Mar 31

BOI6:15 amBoise Air Term. Gowen Fld

20h 05m

2 stops

LIS9:20 amLisbon Humberto Delgado

Apr 9

LIS1:00 pmLisbon Humberto Delgado

39h 22m

2 stops

BOI9:22 pmBoise Air Term. Gowen Fld

$653

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Mon 2/16

7:00 am-9:20 am

2 stops42h 20m

Lisbon Humberto Delgado

Sun 2/22

10:50 am-9:07 pm

2 stops42h 17m

$494

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Fri 1/23

6:10 am-8:10 am

2 stops19h 00m

Lisbon Humberto Delgado

Fri 1/30

11:20 am-7:51 pm

2 stops39h 31m

$495

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Tue 1/27

5:00 am-8:10 am

2 stops19h 10m

Lisbon Humberto Delgado

Wed 2/4

11:20 am-9:22 pm

2 stops42h 02m

$495

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Fri 1/23

6:10 am-9:20 am

2 stops20h 10m

Lisbon Humberto Delgado

Fri 1/30

11:20 am-1:35 pm

2 stops33h 15m

$497

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Mon 2/23

7:00 am-9:20 am

2 stops42h 20m

Lisbon Humberto Delgado

Sun 3/1

5:00 am-9:07 pm

2 stops24h 07m

$498

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

Fri 1/23

7:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Tue 1/27

5:00 am-9:55 am

2 stops35h 55m

$499

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sat 4/11

5:30 am-10:45 am

2 stops22h 15m

Lisbon Humberto Delgado

Tue 4/21

5:00 am-4:15 pm

2 stops18h 15m

$500

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Fri 1/23

9:15 am-3:10 pm

2 stops22h 55m

Lisbon Humberto Delgado

Tue 1/27

5:00 am-6:28 pm

2 stops20h 28m

$501

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Tue 1/27

9:55 am-3:10 pm

2 stops21h 15m

Lisbon Humberto Delgado

Wed 2/4

5:00 am-2:55 pm

2 stops17h 55m

$501

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Fri 4/24

6:00 am-8:00 am

2 stops18h 00m

Lisbon Humberto Delgado

Sat 5/9

8:55 am-9:04 pm

2 stops20h 09m

$590

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Idaho to Lisbon

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

Prices

Airlines

What is the cheapest month to fly to Lisbon?

In general, November is the cheapest month to fly from Idaho to Lisbon. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $642. If you are unable to visit Lisbon during the month of November, then departing from Idaho during the month March is also very affordable. Most momondo users find prices during this month for around $656.

What is the cheapest day to depart on your flight to Lisbon?

Our data shows that Wednesday is the least expensive day to fly to Lisbon. Tickets to fly out on this day can be as low as $1,041. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Idaho to Lisbon for around $1,444.

What is the cheapest time of day to depart on your flight to Lisbon?

The cheapest time of day to fly to Lisbon is in the afternoon when flights can be purchased for as low as $1,071. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $1,393 on average. Flights to Lisbon from Idaho in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

Cheap Idaho to Lisbon flight deals and tips

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

Fastest flight time	18h 00m
Direct flights	None

The fastest flight from Idaho to Lisbon takes 18h 00m

There are no direct flights from Idaho to Lisbon. There are no popular flight routes from Idaho to Lisbon.

Search flight deals

When did momondo last update prices for flights from Idaho to Lisbon Humberto Delgado Airport?
Prices for flights from Idaho to Lisbon Humberto Delgado Airport refresh daily.
How many operators does momondo search for flights from Idaho to Lisbon Humberto Delgado Airport?
The number of operators available for flights from Idaho to Lisbon Humberto Delgado Airport is 4 as of December 2025.
How old do you have to be to fly from Idaho to Lisbon Humberto Delgado Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to Lisbon Humberto Delgado Airport.
What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?
The travel and health documents required for your trip to Lisbon Humberto Delgado Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lisbon Humberto Delgado Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Idaho to Lisbon

Compare and see reviews for airlines that fly from Idaho to Lisbon with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $601	Free Cancellation	Rating 7.4 9,116 reviews	Search United Airlines flights
Air Canada	PriceFrom $602	Free Cancellation	Rating 7.1 10,562 reviews	Search Air Canada flights
American Airlines	PriceFrom $621	Free Cancellation	Rating 7.2 11,069 reviews	Search American Airlines flights
Delta	PriceFrom $654	Free Cancellation	Rating 7.9 8,021 reviews	Search Delta flights

Sintra

Ericeira

Fátima

Nazaré

Setúbal

Peniche

Estoril

Leiria

Oeiras

Sesimbra

Tomar

Evora

Figueira da Foz

Zambujeira do Mar

Batalha

Comporta

Torres Vedras

Óbidos

Sines

Almada

Why use momondo?

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

Finding the right flight to Lisbon 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 Lisbon quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Lisbon from Idaho with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Lisbon from Idaho.

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

Of course. momondo tracks the price of Idaho to Lisbon flights. All you need is a valid email address and we will do the rest; it is that quick and easy.