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Cheap flights from Montana to London Heathrow Airport from £275

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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — LHR
31 Aug — 7 Sep1
1 adult

Cheap flight deals from Montana to Heathrow

Keep the following information in mind while searching for Montana to Heathrow flight deals. Data was last updated 26 August 2025.

Round-trip from

£457

One-way from

£275

Popular in

July

Cheapest in

October

Average price

£660
Delta
  • Delta
  • 29/9-8/10
  • 3 total stops
  • 31h 59m total
  • Montana to London
Search Deals
8/10
  • 8/10
  • 3 total stops
  • 49h 50m total
  • Montana to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£156 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 August 2025
Search Deals

Find flight deals from Montana to Heathrow

Cheapest flights from Montana to Heathrow
Explore the most affordable flight options available from Montana to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 August 2025.

Mon 29/913:05GTF - LHR
1 stop13h 45mDelta
Wed 8/1006:15LHR - GTF
2 stops18h 14mDelta
Deal found 25/8£457
Mon 10/1113:10GTF - LHR
1 stop13h 50mKLM
Mon 24/1120:25LHR - GTF
2 stops28h 05mKLM
Deal found 24/8£458
Wed 3/914:18BZN - LHR
1 stop16h 12mDelta
Tue 9/911:30LHR - BZN
2 stops18h 31mDelta
Deal found 24/8£461
Wed 26/1105:25MSO - LHR
1 stop21h 35mDelta
Wed 3/1206:20LHR - MSO
2 stops20h 52mDelta
Deal found 24/8£461
Wed 8/1015:01BZN - LHR
1 stop16h 14mKLM
Tue 14/1011:45LHR - BZN
2 stops18h 52mKLM
Deal found 24/8£462
Wed 26/1105:25MSO - LHR
1 stop21h 35mMultiple Airlines
Wed 3/1208:40LHR - MSO
2 stops18h 32mMultiple Airlines
Deal found 25/8£462
Mon 29/913:05GTF - LHR
1 stop13h 45mKLM
Wed 8/1011:00LHR - GTF
1 stop13h 29mKLM
Deal found 25/8£463
Tue 9/913:00HLN - LHR
2 stops17h 10mDelta
Wed 17/906:15LHR - HLN
2 stops22h 59mDelta
Deal found 25/8£464
Wed 8/1011:40BZN - LHR
2 stops16h 45mDelta
Tue 14/1011:45LHR - BZN
2 stops18h 52mDelta
Deal found 24/8£465
Wed 8/1015:01BZN - LHR
1 stop16h 14mKLM
Wed 15/1011:00LHR - BZN
1 stop20h 04mKLM
Deal found 24/8£466
Tue 30/913:05GTF - LHR
2 stops18h 10mKLM
Wed 8/1011:00LHR - GTF
1 stop19h 06mKLM
Deal found 25/8£466
Tue 4/1106:10BZN - LHR
2 stops17h 10mDelta
Fri 19/1211:05LHR - BZN
1 stop19h 53mDelta
Deal found 25/8£470

Cheapflights Fare Finder

 
Customise your flight search to find flights from Montana to Heathrow 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 26 August 2025.
Use the filters below to find and compare flights from Montana to London Heathrow Airport that are best for you.

Fly from

Montana

Fly to

Heathrow

Route

Depart

Return

Price

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 29/9

13:05-09:50

1 stop13h 45m

London Heathrow

Wed 8/10

06:15-17:29

2 stops18h 14m

£457

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 10/11

13:10-10:00

1 stop13h 50m

London Heathrow

Mon 24/11

20:25-17:30

2 stops28h 05m

£458

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Wed 26/11

05:25-10:00

1 stop21h 35m

London Heathrow

Wed 3/12

06:20-20:12

2 stops20h 52m

£461

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 30/9

18:11-20:00

2 stops18h 49m

London Heathrow

Wed 8/10

06:15-17:29

2 stops18h 14m

£461

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Wed 26/11

05:25-10:00

1 stop21h 35m

London Heathrow

Wed 3/12

08:40-20:12

2 stops18h 32m

£462

BozemanLondon

BZN - LHR

BZNLHR

Bozeman Gallatin Field

Wed 8/10

15:01-14:15

1 stop16h 14m

London Heathrow

Tue 14/10

11:45-23:37

2 stops18h 52m

£462

BozemanLondon

BZN - LHR

BZNLHR

Bozeman Gallatin Field

Wed 8/10

07:25-11:20

1 stop20h 55m

London Heathrow

Wed 15/10

11:45-23:37

2 stops18h 52m

£462

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 29/9

13:05-09:50

1 stop13h 45m

London Heathrow

Wed 8/10

11:00-17:29

1 stop13h 29m

£463

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 9/9

13:00-13:10

2 stops17h 10m

London Heathrow

Wed 17/9

06:15-22:14

2 stops22h 59m

£464

BozemanLondon

BZN - LHR

BZNLHR

Bozeman Gallatin Field

Wed 8/10

11:40-11:25

2 stops16h 45m

London Heathrow

Tue 14/10

11:45-23:37

2 stops18h 52m

£465

Flights are sorted by cheapest return flights first.

Deals found on 24/8

Showing 1-10 of 37 results
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Best time to book a flight from Montana to Heathrow

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

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

Currently, January is the cheapest month in which you can book a flight from Montana to London Heathrow Airport (average of £112). Flying from Montana to London Heathrow Airport in August is currently the most expensive (average of £164). 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 Heathrow Airport?

Related info for your journey

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

    Airlines like Delta, KLM, and Virgin Atlantic fly from Montana to London Heathrow Airport in about 13h 45m. The time it takes to get you to your destination can typically vary by up to 8h 45m. Airlines will cover a distance of 4472 mi. This flight may include one or multiple stops.

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

    The most popular flight routes from Montana to London Heathrow Airport are Bozeman Gallatin Field - London Heathrow, Missoula Johnson-Bell Field - London Heathrow and Great Falls - London Heathrow.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Montana to Heathrow 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 Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Montana to London Heathrow Airport (average of £112). Flying from Montana to London Heathrow Airport in August is currently the most expensive (average of £164). 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 Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Hounslow
Gatwick
Slough
Northampton
Luton
Deal
Wembley
Ilford
Crawley
Hayes
Watford
Folkestone
Ipswich
Chichester
Winchester
Eastbourne
Swindon
Dartford

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Montana to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Need flexible booking options for your flight to Heathrow from Montana? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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