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$440+ 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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — LIS
Dec 12 — Dec 191
Fri 12/12
Fri 12/19
1 adult, Economy
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Cheap flight deals from Montana to Portugal

Keep the following information in mind while searching for Montana to Portugal flight deals. Data was last updated November 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$489
(United Airlines)

One-way from

$440
(United Airlines)

Popular in

May

Cheapest in

November

Average price

$666
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
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One-way flight from Montana to Portugal
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Highest demand for flights based on searches. 16% potential increase in price ($195 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find 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 November 12, 2025.

This United Airlines deal was found by Cheapflights users on 11/9. 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 12/35:20 pmMSO - LIS
2 stops33h 00mUnited Airlines
Sun 12/710:50 amLIS - MSO
2 stops36h 20mUnited Airlines
Deal found 11/9$537
This United Airlines deal was found by Cheapflights users on 11/12. 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 11/246:20 amMSO - LIS
2 stops34h 10mUnited Airlines
Wed 12/311:00 amLIS - MSO
2 stops36h 10mUnited Airlines
Deal found 11/12$552
This United Airlines deal was found by Cheapflights users on 11/11. 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 12/36:30 amBZN - LIS
2 stops20h 45mUnited Airlines
Sun 12/710:50 amLIS - BZN
2 stops35h 41mUnited Airlines
Deal found 11/11$609
This United Airlines deal was found by Cheapflights users on 11/12. 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 12/166:15 amMSO - LIS
2 stops21h 00mUnited Airlines
Tue 12/305:00 amLIS - MSO
2 stops39h 36mUnited Airlines
Deal found 11/12$1,231
This United Airlines deal was found by Cheapflights users on 11/11. 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.
Sat 12/274:14 pmBZN - LIS
2 stops58h 06mUnited Airlines
Fri 1/211:55 amLIS - BZN
2 stops30h 16mUnited Airlines
Deal found 11/11$1,636
This United Airlines deal was found by Cheapflights users on 11/11. 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.
Fri 12/266:00 amMSO - LIS
2 stops45h 15mUnited Airlines
Thu 1/111:55 amLIS - MSO
2 stops35h 15mUnited Airlines
Deal found 11/11$1,646
This Delta deal was found by Cheapflights users on 11/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:20 amMSO - LIS
2 stops20h 35mDelta
Thu 1/15:00 amLIS - MSO
2 stops22h 40mDelta
Deal found 11/11$1,679
This Delta deal was found by Cheapflights users on 11/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:10 amMSO - LIS
2 stops17h 45mDelta
Fri 1/210:00 amLIS - MSO
2 stops41h 40mDelta
Deal found 11/11$1,715
This United Airlines deal was found by Cheapflights users on 11/11. 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.
Sat 12/275:15 pmMSO - LIS
2 stops57h 05mUnited Airlines
Thu 1/111:55 amLIS - MSO
2 stops35h 15mUnited Airlines
Deal found 11/11$1,799
This American Airlines deal was found by Cheapflights users on 11/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/247:00 amMSO - LIS
2 stops19h 05mMultiple Airlines
Wed 12/38:20 amLIS - MSO
3 stops23h 06mMultiple Airlines
Deal found 11/12$2,097
This United Airlines deal was found by Cheapflights users on 11/11. 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.
Fri 12/266:00 amMSO - LIS
2 stops45h 15mUnited Airlines
Fri 1/211:55 amLIS - MSO
2 stops31h 52mUnited Airlines
Deal found 11/11$2,311
This United Airlines deal was found by Cheapflights users on 11/11. 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.
Sat 12/272:41 pmMSO - LIS
2 stops59h 04mUnited Airlines
Fri 1/26:10 amLIS - MSO
2 stops41h 10mUnited Airlines
Deal found 11/11$2,357

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 November 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

6:15 am-9:20 am

2 stops20h 05m

Lisbon Humberto Delgado

Sun 2/1

10:50 am-9:33 pm

2 stops41h 43m

$489

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

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Mon 11/24

6:20 am-11:30 pm

2 stops34h 10m

Lisbon Humberto Delgado

Wed 12/3

11:00 am-4:10 pm

2 stops36h 10m

$552

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

12:30 pm-3:05 pm

2 stops20h 35m

Lisbon Humberto Delgado

Fri 3/27

11:55 am-1:32 pm

2 stops31h 37m

$706

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

$1,145

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Tue 12/16

6:15 am-10:15 am

2 stops21h 00m

Lisbon Humberto Delgado

Tue 12/30

5:00 am-1:36 pm

2 stops39h 36m

$1,231

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

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Fri 12/26

6:00 am-10:15 am

2 stops45h 15m

Lisbon Humberto Delgado

Thu 1/1

11:55 am-4:10 pm

2 stops35h 15m

$1,646

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Thu 12/25

5:20 am-8:55 am

2 stops20h 35m

Lisbon Humberto Delgado

Thu 1/1

5:00 am-8:40 pm

2 stops22h 40m

$1,679

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 18 results
1
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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, November is the cheapest month in which you can book a flight from Montana to Portugal (average of $551). Flying from Montana to Portugal in September is currently the most expensive (average of $924). 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 20h 05m. Montana and Portugal are separated by a distance of 4860 mi.

  • What are the cheapest airlines to fly from Montana to Portugal one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $440. However, be on the lookout for offers from Air France and Delta, as they are both options that can get you from Montana to Portugal for a low price.

  • 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, November is the cheapest month in which you can book a flight from Montana to Portugal (average of $551). Flying from Montana to Portugal in September is currently the most expensive (average of $924). 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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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 November 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$551Average$951FlexibilityNo cancel feeOn-time69%
DeltaCheapest$618Average$893FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$745Average$930FlexibilityNo cancel feeOn-time75%

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