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Portugal

$501+ Cheap flights from Montana to Portugal

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — LIS
Mar 24 — Mar 311
Tue 3/24
Tue 3/31
1 adult, Economy
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Cheap flight deals from Montana to Portugal

Cheapest flights from Montana to Portugal
Explore the most affordable flight options available from Montana to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 22, 2026.

This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:15 am
MSO
-
LIS
2 stops33h 30m
United Airlines
Wed 4/151:00 pm
LIS
-
MSO
2 stops34h 06m
United Airlines
Deal found 2/20$501
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:15 am
MSO
-
LIS
2 stops33h 30m
United Airlines
Thu 4/165:05 am
LIS
-
MSO
2 stops39h 27m
United Airlines
Deal found 2/20$504
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:15 am
MSO
-
LIS
2 stops33h 30m
United Airlines
Tue 4/146:15 am
LIS
-
MSO
2 stops40h 51m
United Airlines
Deal found 2/20$506
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/255:08 pm
MSO
-
LIS
2 stops34h 07m
United Airlines
Sun 3/111:55 am
LIS
-
MSO
2 stops32h 37m
United Airlines
Deal found 2/21$555
This KAYAK deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/65:32 pm
MSO
-
LIS
2 stops31h 38m
Lufthansa
Sat 11/2110:15 am
LIS
-
MSO
2 stops34h 12m
Lufthansa
Deal found 2/21$572
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/45:15 pm
MSO
-
LIS
2 stops34h 15m
United Airlines
Wed 4/151:00 pm
LIS
-
MSO
2 stops39h 30m
United Airlines
Deal found 2/20$573
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/45:15 pm
MSO
-
LIS
2 stops34h 15m
United Airlines
Thu 4/165:05 am
LIS
-
MSO
2 stops39h 27m
United Airlines
Deal found 2/20$576
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/162:43 pm
BZN
-
LIS
3 stops37h 32m
United Airlines
Tue 3/2411:55 am
LIS
-
BZN
2 stops31h 39m
United Airlines
Deal found 2/21$577
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/45:15 pm
MSO
-
LIS
2 stops34h 15m
United Airlines
Tue 4/146:15 am
LIS
-
MSO
2 stops40h 51m
United Airlines
Deal found 2/20$578
This Delta deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/61:07 pm
MSO
-
LIS
2 stops21h 43m
Delta
Thu 4/165:00 am
LIS
-
MSO
2 stops22h 02m
Delta
Deal found 2/20$582
This United Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/64:19 pm
BZN
-
LIS
2 stops47h 26m
United Airlines
Mon 4/137:25 am
LIS
-
BZN
2 stops35h 06m
United Airlines
Deal found 2/19$602
This United Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1710:35 am
BZN
-
LIS
2 stops28h 20m
United Airlines
Fri 4/2411:25 am
LIS
-
BZN
2 stops33h 09m
United Airlines
Deal found 2/18$615

Find flight deals from Montana to Portugal

Keep the following information in mind while searching for Montana to Portugal flight deals. Data was last updated February 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$501
(United Airlines)

Popular in

June

Cheapest in

February

Average price

$609
Provider with most accurate pricing for Bozeman Gallatin Field-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Bozeman Gallatin Field-Lisbon Humberto Delgado flights.
Search Deals
From Montana to Portugal
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($231 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Montana 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, Cheapflights users made 2,558,603 searches. Data last updated February 22, 2026.
Use the filters below to find and compare flights from Montana to Portugal that are best for you.

Fly from

Montana

Fly to

Portugal

Route

Depart

Return

Price

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Mon 3/16

2:43 pm-10:15 am

3 stops37h 32m

Lisbon Humberto Delgado

Tue 3/24

11:55 am-1:34 pm

2 stops31h 39m

$577

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Fri 4/17

10:35 am-9:55 pm

2 stops28h 20m

Lisbon Humberto Delgado

Fri 4/24

11:25 am-1:34 pm

2 stops33h 09m

$615

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Wed 4/8

1:43 pm-11:25 pm

2 stops26h 42m

Lisbon Humberto Delgado

Wed 4/15

6:35 am-12:53 pm

2 stops37h 18m

$629

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Tue 8/18

5:32 pm-9:20 am

2 stops32h 48m

Lisbon Humberto Delgado

Tue 9/1

11:25 am-1:27 pm

2 stops33h 02m

$648

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Wed 8/19

6:15 am-9:20 am

2 stops20h 05m

Lisbon Humberto Delgado

Thu 9/3

5:05 am-9:26 pm

2 stops23h 21m

$651

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Wed 4/8

2:40 pm-2:30 pm

2 stops16h 50m

Lisbon Humberto Delgado

Wed 4/15

1:00 pm-12:20 pm

2 stops30h 20m

$662

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Wed 4/8

11:50 am-6:45 pm

2 stops23h 55m

Lisbon Humberto Delgado

Wed 4/15

5:00 am-8:11 pm

2 stops22h 11m

$706

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Thu 8/20

6:15 am-9:20 am

2 stops20h 05m

Lisbon Humberto Delgado

Fri 9/4

1:00 pm-11:34 am

2 stops29h 34m

$707

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Fri 5/8

6:30 am-11:00 am

2 stops45h 30m

Lisbon Humberto Delgado

Sat 5/16

5:05 am-10:33 pm

2 stops24h 28m

$727

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Tue 3/17

1:07 pm-6:50 pm

2 stops23h 43m

Lisbon Humberto Delgado

Mon 3/23

3:30 pm-5:23 pm

2 stops31h 53m

$735

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/21

Showing 1-10 of 18 results
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Best time to book a flight from Montana to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Montana with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Montana to Portugal

What is the cheapest month to book a flight from Montana to Portugal?

Currently, March is the cheapest month in which you can book a flight from Montana to Portugal (average of $499). Flying from Montana to Portugal in June is currently the most expensive (average of $913). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Montana to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Montana to Portugal?

    For as low as $662, United Airlines can have you in Portugal from Montana in 16h 50m. Montana and Portugal are separated by a distance of 4860 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Montana to Portugal that include hotel bookings?

    Yes. In addition to deals on Montana to Portugal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Montana to Portugal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Montana to Portugal.

  • Can I find deals for business class flights from Montana to Portugal?

    Yes. Cheapflights offers flight deals from Montana to Portugal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Montana to Portugal?

    Currently, March is the cheapest month in which you can book a flight from Montana to Portugal (average of $499). Flying from Montana to Portugal in June is currently the most expensive (average of $913). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Montana to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Montana to Portugal

Discover the top 2 airlines that operate flights from Montana to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$498Average$930FlexibilityNo cancel feeOn-time69%
DeltaCheapest$501Average$952FlexibilityNo cancel feeOn-timeN/A

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