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Cheap flights from Montana to London from £248

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 25/11. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — LON
1 Sep — 8 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Montana to London

Enter your travel dates to find the best prices.

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 2 August 2026.

Mon 7/1214:30
HLN
-
LHR
2 stops43h 20m
United Airlines
Thu 10/1211:35
LHR
-
HLN
1 stop16h 24m
United Airlines
Deal found 1/8£580
Tue 3/1116:57
GTF
-
LHR
1 stop12h 23m
Alaska Airlines
Tue 17/1114:45
LHR
-
GTF
1 stop32h 32m
Alaska Airlines
Deal found 29/7£638
Mon 9/1112:25
FCA
-
LHR
1 stop14h 35m
KLM
Tue 8/1217:05
LHR
-
FCA
2 stops31h 30m
KLM
Deal found 30/7£648
Mon 16/1105:33
MSO
-
LHR
1 stop21h 27m
Delta
Thu 19/1108:40
LHR
-
MSO
2 stops18h 17m
Delta
Deal found 30/7£648
Tue 3/1113:18
GTF
-
LHR
1 stop13h 42m
Multiple Airlines
Tue 17/1117:50
LHR
-
GTF
2 stops30h 51m
Multiple Airlines
Deal found 30/7£648
Mon 2/1118:27
GTF
-
LHR
1 stop32h 33m
Delta
Mon 16/1111:45
LHR
-
GTF
2 stops36h 56m
Delta
Deal found 29/7£649
Tue 3/1105:40
GTF
-
LHR
1 stop21h 20m
KLM
Tue 17/1117:50
LHR
-
GTF
2 stops30h 51m
KLM
Deal found 1/8£649
Mon 9/1112:25
FCA
-
LHR
2 stops18h 20m
Multiple Airlines
Tue 8/1217:05
LHR
-
FCA
2 stops31h 30m
Multiple Airlines
Deal found 30/7£652
Tue 8/1208:30
MSO
-
LHR
1 stop15h 35m
Multiple Airlines
Tue 15/1206:20
LHR
-
MSO
2 stops20h 37m
Multiple Airlines
Deal found 28/7£654
Sun 1/1118:27
GTF
-
LHR
1 stop32h 33m
Delta
Wed 18/1106:20
LHR
-
GTF
2 stops23h 26m
Delta
Deal found 29/7£654
Sun 1/1118:27
GTF
-
LHR
2 stops33h 18m
Delta
Mon 16/1111:45
LHR
-
GTF
2 stops36h 56m
Delta
Deal found 29/7£655
Tue 3/1113:50
BZN
-
LHR
1 stop15h 30m
Alaska Airlines
Fri 6/1114:45
LHR
-
BZN
1 stop14h 57m
Alaska Airlines
Deal found 30/7£656

Find flight deals from Montana to London

Keep the following information in mind while searching for Montana to London flight deals. Data was last updated 2 August 2026.

Round-trip from

£580

One-way from

£248

Popular in

July

Cheapest in

November

Average price

£724
United Airlines
  • United Airlines
  • 7/12-10/12
  • 3 total stops
  • 59h 44m total
  • Montana to London
Search Deals
United Airlines
  • United Airlines
  • 25/11
  • 2 total stops
  • 17h 20m total
  • Montana to London
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£139 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 2 August 2026.
Use the filters below to find and compare flights from Montana to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

HelenaLondon

HLN - LHR

HLNLHR

Helena

Mon 7/12

14:30-16:50

2 stops43h 20m

London Heathrow

Thu 10/12

11:35-20:59

1 stop16h 24m

£580

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Mon 16/11

05:33-10:00

1 stop21h 27m

London Heathrow

Thu 19/11

08:40-19:57

2 stops18h 17m

£648

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 3/11

13:18-10:00

1 stop13h 42m

London Heathrow

Tue 17/11

17:50-17:41

2 stops30h 51m

£648

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 3/11

05:40-10:00

1 stop21h 20m

London Heathrow

Tue 17/11

17:50-17:41

2 stops30h 51m

£649

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 1/11

18:27-10:00

1 stop32h 33m

London Heathrow

Tue 17/11

06:20-17:41

2 stops18h 21m

£654

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Mon 9/11

14:05-12:20

1 stop15h 15m

London Heathrow

Wed 11/11

14:45-23:59

1 stop16h 14m

£656

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Mon 16/11

13:55-12:20

1 stop15h 25m

London Heathrow

Thu 19/11

14:45-21:25

1 stop13h 40m

£656

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 3/11

16:57-12:20

1 stop12h 23m

London Heathrow

Tue 17/11

14:45-16:17

1 stop32h 32m

£658

BozemanLondon

BZN - LHR

BZNLHR

Bozeman Gallatin Field

Tue 3/11

10:40-09:40

1 stop16h 00m

London Heathrow

Fri 6/11

11:10-11:46

2 stops31h 36m

£658

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 5/1

05:30-07:05

2 stops18h 35m

London Heathrow

Tue 12/1

17:50-17:43

2 stops30h 53m

£658

Flights are sorted by cheapest return flights first.

Deals found on 31/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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 return 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, October is the cheapest month in which you can book a flight from Montana to London (average of £574). Flying from Montana to London in June is currently the most expensive (average of £1,171). 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 for a return flight from Montana to London?

Airfare is below average for this route at the moment.
Montana to London flights typically cost between £687 and £833 in November.
The cheapest return price found within the last 5 days was £656 on Alaska Airlines (3 Nov–6 Nov).

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?

    There are many flights that can get you from Montana to London in 21h 20m. Fly via United Airlines, Delta, or KLM to get the fastest option. The distance between Montana and London is about 4472 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    Most travelers choose Bozeman Gallatin Field - London Heathrow, Kalispell Glacier Park - London Heathrow or Missoula Johnson-Bell Field - 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 holiday 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, October is the cheapest month in which you can book a flight from Montana to London (average of £574). Flying from Montana to London in June is currently the most expensive (average of £1,171). 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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Dover
Romford

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Fly with Cheapflights

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How does Cheapflights help users find flights from Montana to London?

Cheapflights helps you search for flights from Montana to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Montana to London?

Cheapflights simply makes it quick and affordable to book flights from Montana to London by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Montana to London with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Montana to London flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Montana to London become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to London from Montana today and book when prices fit your budget.

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