What airlines fly to Portugal?

United Airlines, Delta and KLM are the top three most popular airlines that fly to Portugal from Montana according to our data. United Airlines is the first choice among our users, with 71% 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.

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

United Airlines is the most popular carrier operating from Montana to Portugal

How long is the flight from Montana to Portugal?

Average flight duration from Montana to Portugal depends on which airport you fly into and out of. Flying from Bozeman to Lisbon is 13h 05m on average, while flying from Missoula to Lisbon is 17h on average. Lisbon is the most popular airport in Portugal.

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

Prices for flights from Montana to Portugal are updated daily.

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

There are 3 operators available for flights from Montana to Portugal as of November 2025.

How old do you have to be to fly from Montana to Portugal?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Montana to Portugal.

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

The travel and health documents you'll need for your trip to Portugal may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Portugal. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$440 Cheap Flights from Montana to Portugal in 2025/26

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Find the cheapest flights from Montana to Portugal

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:15 am - 9:20 amBZN-LIS

20h 05m2 stops

10:50 am - 3:20 pmLIS-BZN

35h 30m2 stops

$489United Airlines

Find Deal

Thu, Jan 22 - Sun, Feb 1

7:45 am - 8:55 amMSO-LIS

18h 10m2 stops

5:30 am - 12:36 amLIS-MSO

26h 06m2 stops

$506Delta

Find Deal

Sun, Dec 7 - Sun, Dec 14

5:20 pm - 9:20 amMSO-LIS

33h 00m2 stops

10:50 am - 4:10 pmLIS-MSO

36h 20m2 stops

$537United Airlines

Find Deal

Wed, Dec 3 - Sun, Dec 7

6:30 am - 10:15 amBZN-LIS

20h 45m2 stops

10:50 am - 3:31 pmLIS-BZN

35h 41m2 stops

$608United Airlines

Find Deal

Wed, Dec 3 - Sun, Dec 7

6:30 am - 10:15 amBZN-LIS

20h 45m2 stops

10:50 am - 1:35 pmLIS-BZN

33h 45m2 stops

$609United Airlines

Find Deal

Wed, Dec 3 - Sun, Dec 7

11:17 am - 9:55 amBZN-LIS

16h 38m1 stop

5:15 pm - 10:42 amLIS-BZN

23h 27m1 stop

$1,144Multiple Airlines

Find Deal

Thu, Mar 19 - Fri, Mar 27

12:05 pm - 11:40 amBZN-LIS

16h 35m1 stop

6:45 pm - 10:57 amLIS-BZN

23h 12m1 stop

$1,454Multiple Airlines

Find Deal

Thu, Jan 22 - Sun, Feb 1

6:00 am - 8:00 amBZN-LIS

19h 00m2 stops

11:15 am - 11:37 pmLIS-BZN

19h 22m2 stops

$3,639Virgin Atlantic

Find Deal

Sat, Dec 6 - Sat, Dec 13

5:00 am - 8:00 amMSO-LIS

20h 00m2 stops

5:30 am - 9:55 pmLIS-MSO

23h 25m2 stops

$3,650Air France

Find Deal

Sun, Dec 7 - Sun, Dec 14

5:00 am - 8:55 amMSO-LIS

20h 55m2 stops

6:30 pm - 9:55 pmLIS-MSO

34h 25m2 stops

$3,663Air France

Find Deal

Sun, Dec 7 - Sat, Dec 13

United Airlines flights from Montana to Portugal

Our best United Airlines deals on Montana to Portugal flight tickets

United Airlines

Jan 22

BZN6:15 amBozeman Gallatin Field

20h 05m

2 stops

LIS9:20 amLisbon Humberto Delgado

Feb 1

LIS10:50 amLisbon Humberto Delgado

35h 30m

2 stops

BZN3:20 pmBozeman Gallatin Field

$489

Find similar

United Airlines

Dec 3

MSO5:20 pmMissoula Johnson-Bell Field

33h 00m

2 stops

LIS9:20 amLisbon Humberto Delgado

Dec 7

LIS10:50 amLisbon Humberto Delgado

36h 20m

2 stops

MSO4:10 pmMissoula Johnson-Bell Field

$537

Find similar

United Airlines

Dec 3

BZN6:30 amBozeman Gallatin Field

20h 45m

2 stops

LIS10:15 amLisbon Humberto Delgado

Dec 7

LIS10:50 amLisbon Humberto Delgado

35h 41m

2 stops

BZN3:31 pmBozeman Gallatin Field

$608

Find similar

Air France flights from Montana to Portugal

Our best Air France deals on Montana to Portugal flight tickets

Air France

Dec 7

MSO5:00 amMissoula Johnson-Bell Field

20h 00m

2 stops

LIS8:00 amLisbon Humberto Delgado

Dec 14

LIS5:30 amLisbon Humberto Delgado

23h 25m

2 stops

MSO9:55 pmMissoula Johnson-Bell Field

$3,650

Find similar

Air France

Dec 7

MSO5:00 amMissoula Johnson-Bell Field

20h 55m

2 stops

LIS8:55 amLisbon Humberto Delgado

Dec 13

LIS6:30 pmLisbon Humberto Delgado

34h 25m

2 stops

MSO9:55 pmMissoula Johnson-Bell Field

$3,663

Find similar

Air France

Dec 6

MSO7:45 amMissoula Johnson-Bell Field

17h 15m

2 stops

LIS8:00 amLisbon Humberto Delgado

Dec 14

LIS5:30 amLisbon Humberto Delgado

23h 25m

2 stops

MSO9:55 pmMissoula Johnson-Bell Field

$4,900

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Thu 1/22

6:15 am-9:20 am

2 stops20h 05m

Lisbon Humberto Delgado

Sun 2/1

10:50 am-3:20 pm

2 stops35h 30m

$489

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Sun 12/7

7:45 am-8:55 am

2 stops18h 10m

Lisbon Humberto Delgado

Sun 12/14

5:30 am-12:36 am

2 stops26h 06m

$506

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Wed 12/3

5:20 pm-9:20 am

2 stops33h 00m

Lisbon Humberto Delgado

Sun 12/7

10:50 am-4:10 pm

2 stops36h 20m

$537

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Wed 12/3

6:30 am-10:15 am

2 stops20h 45m

Lisbon Humberto Delgado

Sun 12/7

10:50 am-3:31 pm

2 stops35h 41m

$608

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Wed 12/3

6:30 am-10:15 am

2 stops20h 45m

Lisbon Humberto Delgado

Sun 12/7

10:50 am-1:35 pm

2 stops33h 45m

$609

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Thu 3/19

11:17 am-9:55 am

1 stop16h 38m

Lisbon Humberto Delgado

Fri 3/27

5:15 pm-10:42 am

1 stop23h 27m

$1,144

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Thu 1/22

12:05 pm-11:40 am

1 stop16h 35m

Lisbon Humberto Delgado

Sun 2/1

6:45 pm-10:57 am

1 stop23h 12m

$1,454

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Sat 12/6

6:00 am-8:00 am

2 stops19h 00m

Lisbon Humberto Delgado

Sat 12/13

11:15 am-11:37 pm

2 stops19h 22m

$3,639

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Sun 12/7

5:00 am-8:00 am

2 stops20h 00m

Lisbon Humberto Delgado

Sun 12/14

5:30 am-9:55 pm

2 stops23h 25m

$3,650

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Sun 12/7

5:00 am-8:55 am

2 stops20h 55m

Lisbon Humberto Delgado

Sat 12/13

6:30 pm-9:55 pm

2 stops34h 25m

$3,663

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first

How to get the cheapest flight ticket from Montana 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

Prices

Airlines

Other information

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

According to our data, Wednesday is the cheapest day to fly to Portugal from Montana. The lowest ticket price found for a Wednesday departure recently was $759. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Friday, with ticket prices averaging around $1,211.

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

Our most recent data shows that the best time of day to fly to Portugal is at noon. Flights from Montana to Portugal during this time can be as low as $957. In the afternoon is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,188 per ticket.

Can stopping save me money on Montana to Portugal flights?

You could potentially save up to 1% on your flight if you consider stops on a Montana to Portugal flight.

Cheap Montana to Portugal flight deals and tips

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

Direct flights	None

There are no direct flights from Montana to Portugal. There are no popular flight routes from Montana to Portugal.

Search flight deals

When did momondo last update prices for flights from Montana to Portugal?
Prices for flights from Montana to Portugal are updated daily.
How many operators does momondo search for flights from Montana to Portugal?
There are 3 operators available for flights from Montana to Portugal as of November 2025.
How old do you have to be to fly from Montana to Portugal?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Montana to Portugal.
What documentation or ID do you need to fly to Portugal?
The travel and health documents you'll need for your trip to Portugal may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Portugal. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Montana to Portugal

Compare and see reviews for airlines that fly from Montana to Portugal with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $551	Free Cancellation	Rating 7.4 9,011 reviews	Search United Airlines flights
Delta	PriceFrom $618	Free Cancellation	Rating 7.9 8,004 reviews	Search Delta flights
KLM	PriceFrom $745	Free Cancellation	Rating 7.7 1,410 reviews	Search KLM flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Montana to Portugal. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Montana to Portugal flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Montana and Portugal by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Montana to Portugal now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Portugal and let you know when they change.