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Portugal

$497+ 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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — LIS
Feb 23 — Mar 21
Mon 2/23
Mon 3/2
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 January 24, 2026.

This United Airlines deal was found by Cheapflights users on 1/23. 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 4/84:19 pm
BZN
-
LIS
2 stops35h 11m
United Airlines
Wed 4/151:00 pm
LIS
-
BZN
2 stops31h 34m
United Airlines
Deal found 1/23$497
This Finnair deal was found by Cheapflights users on 1/21. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/171:41 pm
BZN
-
LIS
2 stops26h 44m
Multiple Airlines
Fri 4/246:35 am
LIS
-
BZN
2 stops37h 16m
Multiple Airlines
Deal found 1/21$499
This United Airlines deal was found by Cheapflights users on 1/23. 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 4/1712:32 pm
BZN
-
LIS
2 stops26h 23m
United Airlines
Fri 4/245:05 am
LIS
-
BZN
2 stops35h 42m
United Airlines
Deal found 1/23$515
This United Airlines deal was found by Cheapflights users on 1/22. 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 3/45:08 pm
MSO
-
LIS
2 stops34h 07m
United Airlines
Sun 3/811:55 am
LIS
-
MSO
2 stops40h 02m
United Airlines
Deal found 1/22$517
This Finnair deal was found by Cheapflights users on 1/22. 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 4/81:41 pm
BZN
-
LIS
2 stops26h 44m
Multiple Airlines
Wed 4/156:35 am
LIS
-
BZN
2 stops37h 16m
Multiple Airlines
Deal found 1/22$538
This United Airlines deal was found by Cheapflights users on 1/21. 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 3/164:30 pm
BZN
-
LIS
2 stops40h 00m
United Airlines
Tue 3/245:00 am
LIS
-
BZN
2 stops60h 40m
United Airlines
Deal found 1/21$540
This United Airlines deal was found by Cheapflights users on 1/23. 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 4/292:38 pm
MSO
-
LIS
2 stops25h 07m
United Airlines
Sat 5/91:00 pm
LIS
-
MSO
2 stops39h 30m
United Airlines
Deal found 1/23$584
This United Airlines deal was found by Cheapflights users on 1/22. 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.
Sun 3/85:16 pm
MSO
-
LIS
2 stops24h 14m
United Airlines
Sun 3/1512:15 pm
LIS
-
MSO
2 stops39h 42m
United Airlines
Deal found 1/22$617
This United Airlines deal was found by Cheapflights users on 1/24. 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 5/812:35 pm
BZN
-
LIS
2 stops37h 45m
United Airlines
Sat 5/161:00 pm
LIS
-
BZN
2 stops28h 01m
United Airlines
Deal found 1/24$664
This United Airlines deal was found by Cheapflights users on 1/22. 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 10/95:32 pm
MSO
-
LIS
2 stops56h 48m
United Airlines
Sat 10/2411:25 am
LIS
-
MSO
2 stops33h 02m
United Airlines
Deal found 1/22$673
This United Airlines deal was found by Cheapflights users on 1/22. 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
Wed 3/2511:55 am
LIS
-
BZN
2 stops29h 45m
United Airlines
Deal found 1/22$690
This United Airlines deal was found by Cheapflights users on 1/22. 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.
Sun 3/84:30 pm
BZN
-
LIS
2 stops25h 00m
United Airlines
Sun 3/1512:15 pm
LIS
-
BZN
2 stops55h 19m
United Airlines
Deal found 1/22$713

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 January 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Ovago
2 stars

Round-trip from

$497
(United Airlines)

Popular in

June

Cheapest in

February

Average price

$666
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 ($241 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 24, 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

Wed 4/8

4:19 pm-10:30 am

2 stops35h 11m

Lisbon Humberto Delgado

Wed 4/15

1:00 pm-1:34 pm

2 stops31h 34m

$497

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Fri 4/17

1:41 pm-11:25 pm

2 stops26h 44m

Lisbon Humberto Delgado

Fri 4/24

6:35 am-12:51 pm

2 stops37h 16m

$499

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Wed 3/4

5:08 pm-10:15 am

2 stops34h 07m

Lisbon Humberto Delgado

Sun 3/8

10:15 am-4:08 pm

2 stops35h 53m

$517

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Wed 4/8

1:41 pm-11:25 pm

2 stops26h 44m

Lisbon Humberto Delgado

Wed 4/15

6:35 am-12:51 pm

2 stops37h 16m

$538

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Mon 3/16

4:30 pm-2:30 pm

2 stops40h 00m

Lisbon Humberto Delgado

Tue 3/24

5:00 am-11:40 am

2 stops60h 40m

$540

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Wed 4/29

2:38 pm-10:45 pm

2 stops25h 07m

Lisbon Humberto Delgado

Sat 5/9

1:00 pm-9:30 pm

2 stops39h 30m

$584

MissoulaLisbon

MSO - LIS

MSOLIS

Missoula Johnson-Bell Field

Sun 3/8

5:16 pm-11:30 pm

2 stops24h 14m

Lisbon Humberto Delgado

Sun 3/15

12:15 pm-9:57 pm

2 stops39h 42m

$617

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Fri 5/8

12:35 pm-9:20 am

2 stops37h 45m

Lisbon Humberto Delgado

Sat 5/16

1:00 pm-10:01 am

2 stops28h 01m

$664

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Mon 3/16

2:43 pm-10:15 am

3 stops37h 32m

Lisbon Humberto Delgado

Wed 3/25

11:55 am-11:40 am

2 stops29h 45m

$690

BozemanLisbon

BZN - LIS

BZNLIS

Bozeman Gallatin Field

Mon 3/16

3:56 pm-5:30 pm

2 stops19h 34m

Lisbon Humberto Delgado

Tue 3/24

5:00 am-10:46 pm

2 stops23h 46m

$765

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/23

Showing 1-10 of 13 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 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 $497, United Airlines can have you in Portugal from Montana in 35h 11m. 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, 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 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

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 January 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$499Average$918FlexibilityNo cancel feeOn-time69%
DeltaCheapest$600Average$943FlexibilityNo cancel feeOn-timeN/A

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