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Cheap flights from Montana to London Heathrow Airport from £168

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — LHR
11 Feb — 18 Feb1
1 adult
1 adult, Economy, 0 bags

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 12 January 2026.

Round-trip from

£439

One-way from

£168

Popular in

June

Cheapest in

October

Average price

£595
Virgin Atlantic
  • Virgin Atlantic
  • 24/2-3/3
  • 2 total stops
  • 33h 56m total
  • Montana to London
Search Deals
United Airlines
  • United Airlines
  • 5/5
  • 2 total stops
  • 18h 00m total
  • Montana to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£99 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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Find flight deals from Montana to Heathrow

Enter your travel dates to find the best prices.

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 12 January 2026.

Tue 24/211:45BIL - LHR
1 stop15h 15mVirgin Atlantic
Tue 3/310:45LHR - BIL
1 stop18h 41mVirgin Atlantic
Deal found 10/1£439
Tue 24/211:45BIL - LHR
1 stop15h 15mMultiple Airlines
Tue 3/306:20LHR - BIL
2 stops20h 19mMultiple Airlines
Deal found 10/1£442
Tue 10/314:45BZN - LHR
1 stop14h 55mDelta
Tue 17/306:20LHR - BZN
2 stops19h 54mDelta
Deal found 11/1£449
Wed 25/211:45BIL - LHR
1 stop15h 15mMultiple Airlines
Wed 4/306:20LHR - BIL
2 stops18h 04mMultiple Airlines
Deal found 11/1£449
Wed 25/207:30MSO - LHR
1 stop16h 35mMultiple Airlines
Wed 4/306:20LHR - MSO
2 stops18h 03mMultiple Airlines
Deal found 11/1£449
Tue 24/213:10HLN - LHR
1 stop13h 50mMultiple Airlines
Tue 3/306:20LHR - HLN
2 stops23h 07mMultiple Airlines
Deal found 10/1£449
Mon 9/211:50BIL - LHR
1 stop15h 10mKLM
Mon 16/220:25LHR - BIL
2 stops28h 02mKLM
Deal found 12/1£450
Mon 23/213:16MSO - LHR
1 stop13h 44mKLM
Mon 2/320:25LHR - MSO
2 stops27h 58mKLM
Deal found 10/1£450
Wed 25/207:30BZN - LHR
1 stop20h 00mKLM
Sun 1/306:30LHR - BZN
2 stops20h 38mKLM
Deal found 10/1£452
Wed 25/207:30MSO - LHR
2 stops17h 35mAir France
Wed 4/306:20LHR - MSO
2 stops18h 03mAir France
Deal found 11/1£452
Tue 10/314:45BZN - LHR
1 stop14h 55mKLM
Tue 17/314:30LHR - BZN
1 stop14h 16mKLM
Deal found 11/1£454
Wed 25/213:16MSO - LHR
1 stop13h 44mKLM
Wed 4/310:45LHR - MSO
1 stop13h 38mKLM
Deal found 11/1£454

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 12 January 2026.
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

BillingsLondon

BIL - LHR

BILLHR

Billings Logan Intl

Tue 24/2

11:45-11:40

2 stops16h 55m

London Heathrow

Tue 3/3

06:20-19:39

2 stops20h 19m

£442

BillingsLondon

BIL - LHR

BILLHR

Billings Logan Intl

Wed 25/2

11:45-10:00

1 stop15h 15m

London Heathrow

Wed 4/3

06:20-17:24

2 stops18h 04m

£449

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Wed 25/2

07:30-07:05

1 stop16h 35m

London Heathrow

Wed 4/3

06:20-17:23

2 stops18h 03m

£449

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 24/2

13:10-10:00

1 stop13h 50m

London Heathrow

Tue 3/3

06:20-22:27

2 stops23h 07m

£449

BillingsLondon

BIL - LHR

BILLHR

Billings Logan Intl

Mon 9/2

11:50-10:00

1 stop15h 10m

London Heathrow

Mon 16/2

20:25-17:27

2 stops28h 02m

£450

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Mon 23/2

13:16-10:00

1 stop13h 44m

London Heathrow

Mon 2/3

20:25-17:23

2 stops27h 58m

£450

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Wed 25/2

13:16-10:00

1 stop13h 44m

London Heathrow

Wed 4/3

10:45-17:23

1 stop13h 38m

£454

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Mon 23/2

07:30-11:40

2 stops21h 10m

London Heathrow

Mon 2/3

06:30-20:01

2 stops20h 31m

£456

BozemanLondon

BZN - LHR

BZNLHR

Bozeman Gallatin Field

Sat 2/5

14:44-06:45

1 stop33h 01m

London Heathrow

Tue 12/5

06:30-22:24

2 stops22h 54m

£465

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 20/4

13:09-15:35

2 stops19h 26m

London Heathrow

Wed 13/5

11:45-22:44

2 stops17h 59m

£465

Flights are sorted by cheapest return flights first.

Deals found on 11/1

Showing 1-10 of 44 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 £451). Flying from Montana to London Heathrow Airport in June is currently the most expensive (average of £832). 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 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 KLM, Delta, and United Airlines fly from Montana to London Heathrow Airport in about 15h 10m. The time it takes to get you to your destination can typically vary by up to 6h. Airlines will cover a distance of 4473 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, Billings Logan Intl - London Heathrow and Missoula Johnson-Bell Field - 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 £451). Flying from Montana to London Heathrow Airport in June is currently the most expensive (average of £832). 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
Luton
Croydon
Northampton
Slough
Hounslow
Gatwick
Ilford
Wembley
Brentford
Hayes
Colchester
Watford
Crawley
Swindon
Kingston upon Thames
Bedford
Chelmsford
Eastbourne
Romford

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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O'Hare Intl to London City flights
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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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