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Cheap flights from Montana to London from £245

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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — LON
15 Aug — 22 Aug1
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 16 July 2026.

Mon 16/1114:34
HLN
-
LHR
1 stop12h 06m
United Airlines
Wed 18/1106:35
LHR
-
HLN
2 stops22h 04m
United Airlines
Deal found 12/7£607
Mon 19/1016:19
BZN
-
LHR
1 stop34h 51m
United Airlines
Thu 22/1009:30
LHR
-
BZN
2 stops18h 34m
United Airlines
Deal found 14/7£618
Sun 29/1117:54
BIL
-
LHR
1 stop32h 46m
United Airlines
Wed 2/1209:30
LHR
-
BIL
2 stops38h 49m
United Airlines
Deal found 15/7£618
Mon 9/1114:34
HLN
-
LHR
1 stop12h 06m
United Airlines
Fri 13/1106:35
LHR
-
HLN
2 stops22h 04m
United Airlines
Deal found 13/7£651
Mon 9/1114:39
GTF
-
LHR
1 stop12h 01m
United Airlines
Fri 13/1106:35
LHR
-
GTF
2 stops22h 12m
United Airlines
Deal found 13/7£653
Mon 16/1113:55
MSO
-
LHR
1 stop15h 25m
Multiple Airlines
Thu 19/1106:15
LHR
-
MSO
2 stops20h 40m
Multiple Airlines
Deal found 13/7£654
Mon 19/1019:25
BZN
-
LHR
1 stop12h 40m
Alaska Airlines
Thu 22/1017:00
LHR
-
BZN
1 stop13h 59m
Alaska Airlines
Deal found 14/7£659
Wed 14/1019:45
FCA
-
LHR
1 stop12h 20m
Alaska Airlines
Wed 21/1017:00
LHR
-
FCA
1 stop12h 59m
Alaska Airlines
Deal found 13/7£659
Tue 3/1113:55
MSO
-
LHR
1 stop15h 25m
Alaska Airlines
Tue 10/1114:45
LHR
-
MSO
1 stop13h 40m
Alaska Airlines
Deal found 14/7£659
Tue 1/1206:15
MSO
-
LHR
1 stop20h 25m
United Airlines
Thu 10/1207:30
LHR
-
MSO
2 stops20h 56m
United Airlines
Deal found 13/7£661
Mon 9/1116:57
GTF
-
LHR
1 stop12h 23m
Alaska Airlines
Fri 13/1114:45
LHR
-
GTF
1 stop32h 32m
Alaska Airlines
Deal found 13/7£661
Wed 28/1014:03
FCA
-
LHR
1 stop16h 17m
Alaska Airlines
Wed 11/1114:45
LHR
-
FCA
1 stop28h 35m
Alaska Airlines
Deal found 13/7£663

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 16 July 2026.

Round-trip from

£569

One-way from

£245

Popular in

July

Cheapest in

November

Average price

£1,123
United Airlines
  • United Airlines
  • 11/1-14/1
  • 4 total stops
  • 56h 06m total
  • Montana to London
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 1/11
  • 1 total stop
  • 18h 53m total
  • Montana to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£171 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£27 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 16 July 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 16/11

14:34-09:40

1 stop12h 06m

London Heathrow

Wed 18/11

06:35-21:39

2 stops22h 04m

£607

HelenaLondon

HLN - LHR

HLNLHR

Helena

Mon 9/11

14:34-09:40

1 stop12h 06m

London Heathrow

Fri 13/11

06:35-21:39

2 stops22h 04m

£651

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/11

14:39-09:40

1 stop12h 01m

London Heathrow

Fri 13/11

06:35-21:47

2 stops22h 12m

£653

BillingsLondon

BIL - LHR

BILLHR

Billings Logan Intl

Mon 11/1

16:13-09:40

1 stop34h 27m

London Heathrow

Thu 14/1

07:40-20:51

2 stops20h 11m

£655

BillingsLondon

BIL - LHR

BILLHR

Billings Logan Intl

Mon 11/1

10:45-09:40

1 stop15h 55m

London Heathrow

Thu 14/1

06:35-20:51

2 stops21h 16m

£658
Fastest return journey

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Tue 3/11

14:05-12:20

1 stop15h 15m

London Heathrow

Wed 9/12

14:45-23:59

1 stop16h 14m

£659

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

£659

BillingsLondon

BIL - LHR

BILLHR

Billings Logan Intl

Mon 11/1

14:03-12:20

1 stop15h 17m

London Heathrow

Thu 14/1

14:45-00:08

1 stop16h 23m

£659

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Mon 9/11

07:00-12:20

1 stop22h 20m

London Heathrow

Wed 18/11

14:45-21:25

1 stop13h 40m

£659

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/11

16:57-12:20

1 stop12h 23m

London Heathrow

Fri 13/11

14:45-16:17

1 stop32h 32m

£661

Flights are sorted by cheapest return flights first.

Deals found on 13/7

Showing 1-10 of 57 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, March is the cheapest month in which you can book a flight from Montana to London (average of £412). Flying from Montana to London in June is currently the most expensive (average of £893). 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 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 12h 06m. Fly via United Airlines, Lufthansa, or Alaska Airlines to get the fastest option. The distance between Montana and London is about 4537 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, Billings Logan Intl - London Heathrow or Bozeman Gallatin Field - London City 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, March is the cheapest month in which you can book a flight from Montana to London (average of £412). Flying from Montana to London in June is currently the most expensive (average of £893). 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
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Milton Keynes
Luton
Gatwick
Wembley
Slough
Ilford
Croydon
Hayes
Brentford
Colchester
Watford
Eastbourne
Southend-on-Sea
Kingston upon Thames
Southall
Aylesbury
Romford
Enfield
Borehamwood

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Alternative routes for Montana to London

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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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