HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
London

$377+ Cheap flights from Montana to London (LON)

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 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — LON
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Montana to London with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Montana to London

Keep the following information in mind while searching for Montana to London flight deals. Data was last updated September 11, 2025.

Round-trip from

$617
(KLM)

One-way from

$377
(Kiwi.com)

Popular in

July

Cheapest in

October

Average price

$839
From Montana to London (LON)
Search Deals
One-way flight from Montana to London (LON)
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($283 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($49 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Montana to London

Cheapest flights from Montana to London
Explore the most affordable flight options available from Montana to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This KLM deal was found by Cheapflights users on 9/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/201:07 pmMSO - LHR
1 stop13h 43mKLM
Tue 11/46:30 amLHR - MSO
2 stops22h 10mKLM
Deal found 9/10$617
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/291:05 pmGTF - LHR
1 stop13h 45mDelta
Wed 10/86:15 amLHR - GTF
2 stops18h 14mDelta
Deal found 9/9$621
This KLM deal was found by Cheapflights users on 9/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:25 amBZN - LHR
1 stop20h 05mKLM
Wed 11/196:30 amLHR - BZN
2 stops22h 59mKLM
Deal found 9/9$624
This Air France deal was found by Cheapflights users on 9/10. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/265:25 amMSO - LHR
1 stop21h 35mMultiple Airlines
Wed 12/38:40 amLHR - MSO
2 stops20h 12mMultiple Airlines
Deal found 9/10$624
This KLM deal was found by Cheapflights users on 9/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/31:08 pmGTF - LHR
1 stop13h 52mKLM
Thu 11/208:25 pmLHR - GTF
2 stops28h 05mKLM
Deal found 9/9$624
This Delta deal was found by Cheapflights users on 9/11. 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.
Wed 10/155:35 amBZN - LHR
1 stop21h 15mDelta
Wed 10/229:55 amLHR - BZN
2 stops19h 19mDelta
Deal found 9/11$625
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/71:00 pmHLN - LHR
2 stops17h 30mDelta
Tue 10/146:30 amLHR - HLN
2 stops22h 46mDelta
Deal found 9/9$627
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1111:40 amBZN - LHR
2 stops15h 35mDelta
Wed 11/198:40 amLHR - BZN
2 stops21h 54mDelta
Deal found 9/9$628
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/151:07 pmMSO - LHR
2 stops17h 23mDelta
Wed 10/228:40 amLHR - MSO
2 stops20h 00mDelta
Deal found 9/9$628
This Delta deal was found by Cheapflights users on 9/11. 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.
Wed 11/265:25 amMSO - LHR
2 stops20h 35mDelta
Wed 12/38:40 amLHR - MSO
2 stops20h 12mDelta
Deal found 9/11$629
This KLM deal was found by Cheapflights users on 9/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/41:08 pmGTF - LHR
1 stop13h 52mKLM
Wed 11/1910:45 amLHR - GTF
1 stop13h 45mKLM
Deal found 9/9$630
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/31:00 pmHLN - LHR
1 stop14h 00mDelta
Thu 11/2010:45 amLHR - HLN
1 stop18h 52mDelta
Deal found 9/9$630

Cheapflights Fare Finder

 
Customize your flight search to find flights from Montana to London 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 September 11, 2025.
Use the filters below to find and compare flights from Montana to London that are best for you.

Fly from

Montana

Fly to

London

Route

Depart

Return

Price

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Mon 10/20

1:07 pm-9:50 am

1 stop13h 43m

London Heathrow

Tue 11/4

6:30 am-9:40 pm

2 stops22h 10m

$617

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/29

1:05 pm-9:50 am

1 stop13h 45m

London Heathrow

Wed 10/8

6:15 am-5:29 pm

2 stops18h 14m

$623

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Wed 11/26

5:25 am-10:00 am

1 stop21h 35m

London Heathrow

Wed 12/3

6:30 am-9:52 pm

2 stops22h 22m

$624

BozemanLondon

BZN - LHR

BZNLHR

Bozeman Gallatin Field

Wed 10/15

5:35 am-9:50 am

1 stop21h 15m

London Heathrow

Wed 10/22

9:55 am-10:14 pm

2 stops19h 19m

$625

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 9/30

5:40 am-11:00 am

2 stops22h 20m

London Heathrow

Wed 10/8

6:15 am-5:29 pm

2 stops18h 14m

$626

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 10/7

1:00 pm-1:30 pm

2 stops17h 30m

London Heathrow

Tue 10/14

6:30 am-10:16 pm

2 stops22h 46m

$627

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Wed 11/26

5:25 am-9:00 am

2 stops20h 35m

London Heathrow

Wed 12/3

8:40 am-9:52 pm

2 stops20h 12m

$628

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Wed 10/15

1:07 pm-1:30 pm

2 stops17h 23m

London Heathrow

Wed 10/22

8:40 am-9:40 pm

2 stops20h 00m

$628

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Tue 1/13

8:00 am-7:05 am

1 stop16h 05m

London Heathrow

Tue 1/27

6:20 am-8:17 pm

2 stops20h 57m

$629

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 11/4

1:08 pm-10:00 am

1 stop13h 52m

London Heathrow

Tue 11/18

10:45 am-10:44 pm

1 stop18h 59m

$630

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 48 results
1
2
3
...
5

Best time to book a flight from Montana to London

Have a flexible travel schedule? Discover the best time to fly to London 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 London

What is the cheapest month to book a flight from Montana to London?

Currently, November is the cheapest month in which you can book a flight from Montana to London (average of $661). Flying from Montana to London in June is currently the most expensive (average of $1,098). 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.

How much does it cost to fly round-trip from Montana to London?

Related info for your journey

Find useful and relevant information for your journey from Montana to London. 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 London?

    A quick flight from Montana to London can take about 11h 55m. KLM provides one of the quickest options available for as low as $724. There are 4473 mi between Montana and London. This flight may include one or multiple stops.

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

    To fly one-way, consider booking your trip with JetBlue, which is currently one of the cheapest options available, starting at $378. United Airlines flights start at $482 while deals on Lufthansa start at $494 one-way.

  • What are the most popular routes from Montana to London?

    Most travelers choose Bozeman Gallatin Field - London Heathrow, Missoula Johnson-Bell Field - London Heathrow or Great Falls - London Heathrow when deciding on the best route from Montana to London.

  • Can I find deals for flights from Montana to London that include hotel bookings?

    Yes. In addition to deals on Montana to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Montana to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Montana to London.

  • Can I find deals for business class flights from Montana to London?

    Yes. Cheapflights offers flight deals from Montana to London 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 London?

    Currently, November is the cheapest month in which you can book a flight from Montana to London (average of $661). Flying from Montana to London in June is currently the most expensive (average of $1,098). 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

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Gatwick
Borehamwood
Aylesbury
Bedford
Wembley
Folkestone
Chichester
Arundel

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Montana to London

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
Boston to Heathrow flights
Los Angeles to Heathrow flights
LaGuardia to Heathrow flights
Dulles Intl to Heathrow flights
John F Kennedy Intl to London City flights
Newark to Gatwick flights
John F Kennedy Intl to Gatwick flights
O'Hare Intl to Heathrow flights
San Francisco to Heathrow flights
Baltimore to Heathrow flights
Dallas/Fort Worth to Heathrow flights
LaGuardia to Gatwick flights
Newark to London City flights
Seattle to Heathrow flights
Hobby to Heathrow flights
John F Kennedy Intl to Stansted flights
John F Kennedy Intl to Luton flights
Boston to Gatwick flights
Reagan-National to Heathrow flights
Atlanta to Heathrow flights
Miami to Heathrow flights
Philadelphia to Heathrow flights
Boston to London City flights
Denver to Heathrow flights
Dulles Intl to Gatwick flights
Orlando to Heathrow flights
Newark to Stansted flights
Newark to Luton flights
Dulles Intl to London City flights
Baltimore to Gatwick flights
Los Angeles to London City flights
George Bush Intcntl to Heathrow flights
Reagan-National to Gatwick flights
O'Hare Intl to Gatwick flights
San Francisco to Gatwick flights
Newark to Edinburgh flights
Los Angeles to Gatwick flights
John F Kennedy Intl to Edinburgh flights
O'Hare Intl to London City flights
Dallas/Fort Worth to Gatwick flights
Austin to Heathrow flights
LaGuardia to London City flights
San Francisco to London City flights
Minneapolis to Heathrow flights
Seattle to Gatwick flights
Orlando to Gatwick flights
Boston to Stansted flights
Raleigh to Heathrow flights

Top 2 airlines flying from Montana to London

Discover the top 2 airlines that operate flights from Montana to London. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$645Average$882FlexibilityNo cancel feeOn-time69%
DeltaCheapest$740Average$895FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.