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$489+ 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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — LIS
Dec 21 — Dec 281
Sun 12/21
Sun 12/28
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 21, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$489
(United Airlines)

Popular in

June

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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Highest demand for flights based on searches. 20% potential increase in price ($246 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($40 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 21, 2025.

This United Airlines deal was found by Cheapflights users on 11/20. 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.
Mon 12/16:35 amBZN - LIS
2 stops20h 40mUnited Airlines
Sun 12/710:50 amLIS - BZN
2 stops33h 45mUnited Airlines
Deal found 11/20$609
This United Airlines deal was found by Cheapflights users on 11/19. 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.
Tue 12/166:15 amMSO - LIS
2 stops21h 00mUnited Airlines
Tue 12/306:10 amLIS - MSO
2 stops38h 26mUnited Airlines
Deal found 11/19$1,133
This American Airlines deal was found by Cheapflights users on 11/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/167:00 amMSO - LIS
2 stops19h 05mMultiple Airlines
Tue 12/308:20 amLIS - MSO
3 stops22h 22mMultiple Airlines
Deal found 11/19$5,675

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 21, 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

Mon 1/26

11:20 am-9:33 pm

2 stops41h 13m

$489

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

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Fri 1/30

6:00 am-8:10 am

2 stops19h 10m

Lisbon Humberto Delgado

Tue 2/3

5:00 am-9:51 pm

2 stops23h 51m

$496

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Mon 12/1

6:35 am-10:15 am

2 stops20h 40m

Lisbon Humberto Delgado

Sun 12/7

10:50 am-1:35 pm

2 stops33h 45m

$609

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Thu 5/14

6:15 am-9:20 am

3 stops44h 05m

Lisbon Humberto Delgado

Thu 5/21

12:55 pm-4:10 pm

2 stops34h 15m

$663

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Fri 5/8

2:37 pm-9:20 am

3 stops35h 43m

Lisbon Humberto Delgado

Sat 5/16

5:05 am-10:56 pm

2 stops24h 51m

$772

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Sat 3/14

5:16 pm-9:20 am

2 stops58h 04m

Lisbon Humberto Delgado

Thu 3/19

5:00 am-9:57 pm

2 stops22h 57m

$805

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Sun 3/15

5:16 pm-9:20 am

2 stops34h 04m

Lisbon Humberto Delgado

Thu 3/19

5:00 am-9:57 pm

2 stops22h 57m

$805

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Sun 3/15

6:10 pm-8:00 am

2 stops31h 50m

Lisbon Humberto Delgado

Fri 3/20

10:00 am-8:17 pm

2 stops40h 17m

$963

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Sun 3/15

5:16 pm-9:20 am

2 stops34h 04m

Lisbon Humberto Delgado

Fri 3/20

10:55 am-9:57 pm

2 stops41h 02m

$1,014

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

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 13h 05m. Montana and Portugal are separated by a distance of 4860 mi.

  • 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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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 21, 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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