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Portugal

$514+ 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 4/17. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — LIS
Mar 18 — Mar 251
Wed 3/18
Wed 3/25
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 16, 2026.

This Finnair deal was found by Cheapflights users on 2/12. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/171:43 pm
BZN
-
LIS
2 stops26h 42m
Multiple Airlines
Fri 4/246:35 am
LIS
-
BZN
2 stops37h 18m
Multiple Airlines
Deal found 2/12$514
This United Airlines deal was found by Cheapflights users on 2/13. 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 2/266:15 am
MSO
-
LIS
2 stops18h 55m
United Airlines
Wed 3/115:00 am
LIS
-
MSO
2 stops38h 33m
United Airlines
Deal found 2/13$537
This United Airlines deal was found by Cheapflights users on 2/12. 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.
Fri 2/206:15 am
MSO
-
LIS
2 stops18h 55m
United Airlines
Sun 2/2211:55 am
LIS
-
MSO
2 stops32h 37m
United Airlines
Deal found 2/12$556
This United Airlines deal was found by Cheapflights users on 2/12. 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 2/166:15 am
MSO
-
LIS
2 stops18h 55m
United Airlines
Sat 2/2810:15 am
LIS
-
MSO
2 stops18h 42m
United Airlines
Deal found 2/12$563
This United Airlines deal was found by Cheapflights users on 2/12. 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 2/175:08 pm
MSO
-
LIS
2 stops58h 07m
United Airlines
Wed 2/255:00 am
LIS
-
MSO
2 stops39h 32m
United Airlines
Deal found 2/12$567
This BusinessClass deal was found by Cheapflights users on 2/12. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/82:01 pm
BZN
-
LIS
2 stops25h 49m
Multiple Airlines
Wed 4/159:50 am
LIS
-
BZN
2 stops19h 50m
Multiple Airlines
Deal found 2/12$570
This United Airlines deal was found by Cheapflights users on 2/12. 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 2/166:15 am
MSO
-
LIS
2 stops18h 55m
United Airlines
Thu 2/2610:15 am
LIS
-
MSO
2 stops18h 42m
United Airlines
Deal found 2/12$570
This United Airlines deal was found by Cheapflights users on 2/12. 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 2/175:08 pm
MSO
-
LIS
2 stops58h 07m
United Airlines
Tue 2/2410:15 am
LIS
-
MSO
2 stops18h 42m
United Airlines
Deal found 2/12$574
This Finnair deal was found by Cheapflights users on 2/14. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/11:47 pm
BZN
-
LIS
2 stops26h 38m
Multiple Airlines
Wed 4/156:35 am
LIS
-
BZN
2 stops37h 18m
Multiple Airlines
Deal found 2/14$594
This American Airlines deal was found by Cheapflights users on 2/12. 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.
Thu 2/191:28 pm
BZN
-
LIS
2 stops21h 32m
American Airlines
Wed 2/258:45 pm
LIS
-
BZN
2 stops25h 01m
American Airlines
Deal found 2/12$612
This Air France deal was found by Cheapflights users on 2/15. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/47:30 am
BZN
-
LIS
2 stops24h 40m
Multiple Airlines
Sun 3/811:25 am
LIS
-
BZN
2 stops36h 21m
Multiple Airlines
Deal found 2/15$618
This Delta deal was found by Cheapflights users on 2/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/191:16 pm
MSO
-
LIS
2 stops18h 19m
Delta
Wed 2/255:00 am
LIS
-
MSO
2 stops22h 01m
Delta
Deal found 2/12$624

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 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$514
(Finnair)

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 16, 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

Fri 4/17

1:43 pm-11:25 pm

2 stops26h 42m

Lisbon Humberto Delgado

Fri 4/24

6:35 am-12:53 pm

2 stops37h 18m

$514

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Thu 2/26

6:15 am-8:10 am

2 stops18h 55m

Lisbon Humberto Delgado

Wed 3/11

5:00 am-1:33 pm

2 stops38h 33m

$537

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Wed 4/8

2:01 pm-10:50 pm

2 stops25h 49m

Lisbon Humberto Delgado

Wed 4/15

9:50 am-10:40 pm

2 stops19h 50m

$570

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Wed 4/1

1:47 pm-11:25 pm

2 stops26h 38m

Lisbon Humberto Delgado

Wed 4/15

6:35 am-12:53 pm

2 stops37h 18m

$594

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Wed 3/4

7:30 am-3:10 pm

2 stops24h 40m

Lisbon Humberto Delgado

Sun 3/8

11:25 am-5:46 pm

2 stops36h 21m

$618

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Wed 3/4

6:15 am-10:15 am

2 stops21h 00m

Lisbon Humberto Delgado

Sun 3/8

11:55 am-9:57 pm

2 stops40h 02m

$629

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Tue 3/31

3:19 pm-5:50 pm

2 stops19h 31m

Lisbon Humberto Delgado

Tue 4/7

5:00 am-10:46 pm

2 stops24h 46m

$661

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Wed 3/4

8:11 am-10:15 am

2 stops19h 04m

Lisbon Humberto Delgado

Sun 3/8

11:55 am-1:34 pm

2 stops31h 39m

$685

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Wed 4/1

1:07 pm-5:50 pm

2 stops21h 43m

Lisbon Humberto Delgado

Wed 4/15

5:00 am-8:02 pm

2 stops22h 02m

$727

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Sun 7/12

7:15 am-10:30 am

2 stops44h 15m

Lisbon Humberto Delgado

Thu 7/23

1:00 pm-11:34 am

2 stops53h 34m

$811

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/12

Showing 1-10 of 14 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 $537, United Airlines can have you in Portugal from Montana in 18h 55m. Montana and Portugal are separated by a distance of 4926 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, 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

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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 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$498Average$936FlexibilityNo cancel feeOn-time69%
DeltaCheapest$501Average$1,037FlexibilityNo cancel feeOn-timeN/A

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