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$423+ Cheap flights from Montana to Portugal

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — LIS
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Montana to Portugal

Best flights from Montana to Portugal
Discover carefully curated flight deals from Montana to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/10. 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.
Thu 1/2212:05 pmBZN - LIS
1 stop13h 05mUnited Airlines
Sun 2/110:50 amLIS - BZN
2 stops41h 43mUnited Airlines
Deal found 12/10$489
This KLM deal was found by Cheapflights users on 12/11. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/171:16 pmMSO - LIS
2 stops22h 34mKLM
Sat 2/283:30 pmLIS - MSO
2 stops35h 31mKLM
Deal found 12/11$505
This United Airlines deal was found by Cheapflights users on 12/9. 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 3/164:30 pmBZN - LIS
2 stops25h 00mUnited Airlines
Tue 3/245:00 amLIS - BZN
2 stops23h 09mUnited Airlines
Deal found 12/9$501
This United Airlines deal was found by Cheapflights users on 12/9. 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 1/216:00 amMSO - LIS
2 stops19h 10mUnited Airlines
Sun 1/2510:15 amLIS - MSO
2 stops18h 36mUnited Airlines
Deal found 12/9$510
This United Airlines deal was found by Cheapflights users on 12/10. 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 1/2112:05 pmBZN - LIS
1 stop13h 05mUnited Airlines
Sun 1/2510:50 amLIS - BZN
2 stops31h 54mUnited Airlines
Deal found 12/10$512
This United Airlines deal was found by Cheapflights users on 12/11. 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 4/86:20 amBZN - LIS
2 stops21h 10mUnited Airlines
Tue 4/1411:25 amLIS - BZN
2 stops31h 08mUnited Airlines
Deal found 12/11$650
This United Airlines deal was found by Cheapflights users on 12/11. 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 2/176:15 amMSO - LIS
2 stops20h 05mUnited Airlines
Sat 2/285:00 amLIS - MSO
3 stops23h 57mUnited Airlines
Deal found 12/11$862

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$489
(United Airlines)

One-way from

$423
(Kiwi.com)

Popular in

June

Cheapest in

February
Provider with most accurate pricing for Bozeman Gallatin Field-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Bozeman Gallatin Field-Lisbon Humberto Delgado flights.
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From Montana to Portugal
Search Deals
One-way flight from Montana to Portugal
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($251 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
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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 December 12, 2025.
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

Thu 1/22

12:05 pm-8:10 am

1 stop13h 05m

Lisbon Humberto Delgado

Sun 2/1

10:50 am-9:33 pm

2 stops41h 43m

$489

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Mon 3/16

4:30 pm-11:30 pm

2 stops25h 00m

Lisbon Humberto Delgado

Tue 3/24

5:00 am-10:09 pm

2 stops23h 09m

$501

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Tue 2/17

1:16 pm-6:50 pm

2 stops22h 34m

Lisbon Humberto Delgado

Sat 2/28

3:30 pm-8:01 pm

2 stops35h 31m

$505

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Wed 1/21

6:00 am-8:10 am

2 stops19h 10m

Lisbon Humberto Delgado

Sun 1/25

10:15 am-9:51 pm

2 stops18h 36m

$510

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Wed 1/21

12:05 pm-8:10 am

1 stop13h 05m

Lisbon Humberto Delgado

Sun 1/25

10:50 am-11:44 am

2 stops31h 54m

$512

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Wed 4/8

6:20 am-10:30 am

2 stops21h 10m

Lisbon Humberto Delgado

Tue 4/14

11:25 am-11:33 am

2 stops31h 08m

$650

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Tue 2/17

6:15 am-9:20 am

2 stops20h 05m

Lisbon Humberto Delgado

Sat 2/28

5:00 am-9:57 pm

3 stops23h 57m

$862

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Tue 4/14

6:51 pm-5:30 am

2 stops27h 39m

$423

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

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 August is currently the most expensive (average of $1,263). 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 $489, United Airlines can have you in Portugal from Montana in 13h 05m. 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 August is currently the most expensive (average of $1,263). 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

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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 3 airlines flying from Montana to Portugal

Discover the top 3 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$551Average$951FlexibilityNo cancel feeOn-time69%
DeltaCheapest$618Average$908FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$745Average$930FlexibilityNo cancel feeOn-time75%

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