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Cheap flights from Montana to London Heathrow Airport 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 — LHR
6 Sep — 13 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap 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 7 August 2026.

Sun 6/1210:45 -
2 stops24h 50m
Tue 8/1215:00 -
2 stops36h 51m
Deal found 6/8£562
Mon 7/1214:30 -
2 stops43h 20m
Thu 10/1211:35 -
1 stop16h 24m
Deal found 6/8£582
Sun 6/1207:00 -
2 stops17h 55m
Tue 8/1207:30 -
2 stops20h 21m
Deal found 4/8£604
Sun 15/1110:15 -
2 stops39h 10m
Wed 18/1106:35 -
2 stops23h 08m
Deal found 3/8£617
Mon 16/1105:33 -
1 stop21h 27m
Thu 19/1108:40 -
2 stops18h 17m
Deal found 3/8£651
Sun 6/1206:31 -
1 stop20h 09m
Tue 12/106:35 -
2 stops21h 55m
Deal found 7/8£652
Sun 15/1105:35 -
2 stops18h 30m
Wed 9/1217:50 -
2 stops30h 51m
Deal found 3/8£654
Mon 7/1213:04 -
1 stop13h 56m
Thu 10/1206:20 -
2 stops23h 06m
Deal found 3/8£656
Tue 3/1113:50 -
1 stop15h 30m
Fri 6/1114:45 -
1 stop14h 57m
Deal found 2/8£659
Wed 11/1106:30 -
1 stop22h 50m
Tue 24/1114:45 -
1 stop16h 13m
Deal found 3/8£659
Mon 16/1116:22 -
1 stop12h 58m
Thu 19/1114:45 -
1 stop13h 40m
Deal found 3/8£659
Mon 23/1107:02 -
1 stop22h 18m
Tue 8/1214:45 -
1 stop16h 14m
Deal found 6/8£660

Find flight deals from Montana to Heathrow

Keep the following information in mind while searching for Montana to Heathrow flight deals. Data was last updated 7 August 2026.

Round-trip from

£562

One-way from

£248

Popular in

July

Cheapest in

October

Average price

£726
United Airlines
  • United Airlines
  • 6/12-8/12
  • 4 total stops
  • 61h 41m total
  • Montana to London
Search Deals
United Airlines
  • United Airlines
  • 25/11
  • 1 total stop
  • 11h 58m total
  • Montana to London
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£119 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 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 7 August 2026.
Use the filters below to find and compare flights from Montana to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BillingsLondon

BIL Billings Logan Intl - LHR London Heathrow

BILLHR

Billings Logan Intl

Sun 6/12

10:45-18:35

2 stops24h 50m

London Heathrow

Tue 8/12

15:00-20:51

2 stops36h 51m

£562

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Mon 7/12

14:30-16:50

2 stops43h 20m

London Heathrow

Thu 10/12

11:35-20:59

1 stop16h 24m

£582

ButteLondon

BTM Butte Silver Bow Co - LHR London Heathrow

BTMLHR

Butte Silver Bow Co

Sun 15/11

10:15-08:25

2 stops39h 10m

London Heathrow

Wed 18/11

06:35-22:43

2 stops23h 08m

£617

MissoulaLondon

MSO Missoula Johnson-Bell Field - LHR London Heathrow

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

£651

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Sun 15/11

05:35-07:05

2 stops18h 30m

London Heathrow

Wed 9/12

17:50-17:41

2 stops30h 51m

£654

BozemanLondon

BZN Bozeman Gallatin Field - LHR London Heathrow

BZNLHR

Bozeman Gallatin Field

Wed 3/2

12:30-10:50

2 stops15h 20m

London Heathrow

Tue 9/2

06:50-19:07

2 stops19h 17m

£658
Fastest return journey

BozemanLondon

BZN Bozeman Gallatin Field - LHR London Heathrow

BZNLHR

Bozeman Gallatin Field

Tue 3/11

13:50-12:20

1 stop15h 30m

London Heathrow

Fri 6/11

14:45-22:42

1 stop14h 57m

£659

KalispellLondon

FCA Kalispell Glacier Park - LHR London Heathrow

FCALHR

Kalispell Glacier Park

Wed 11/11

06:30-12:20

1 stop22h 50m

London Heathrow

Tue 24/11

14:45-23:58

1 stop16h 13m

£659

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Mon 7/12

07:00-07:45

2 stops17h 45m

London Heathrow

Thu 10/12

06:20-22:26

2 stops23h 06m

£660

BillingsLondon

BIL Billings Logan Intl - LHR London Heathrow

BILLHR

Billings Logan Intl

Mon 11/1

06:00-12:20

1 stop23h 20m

London Heathrow

Wed 20/1

14:45-00:08

1 stop16h 23m

£660

Flights are sorted by cheapest return flights first.

Deals found on 7/8

Showing 1-10 of 52 resultsSorted by cheapest first
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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

How much does it cost for a return flight from Montana to London Heathrow Airport?

Airfare is typical for this route at the moment.
Montana to London Heathrow Airport flights typically cost between £585 and £795 in February.
The cheapest return price found within the last 5 days was £657 on Delta (3 Feb–9 Feb).

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 United Airlines, Delta, and KLM fly from Montana to London Heathrow Airport in about 18h 30m. The time it takes to get you to your destination can typically vary by up to 6h 20m. 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 Kalispell Glacier Park - 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.

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
Hounslow
Milton Keynes
Gatwick
Luton
Wembley
Slough
Ilford
Hayes
Croydon
Colchester
Eastbourne
Brentford
Northampton
Watford
Swindon
Southend-on-Sea
Enfield
Kingston upon Thames
Southall
Poole

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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John F Kennedy Intl to Gatwick flights
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Atlanta to Heathrow flights
Boston to Gatwick flights
Newark to London City flights
Reagan-National to Heathrow flights
Orlando to Heathrow flights
Newark to Stansted flights
Dulles Intl to Gatwick flights
Miami to Heathrow flights
Newark to Luton flights
Los Angeles to Gatwick flights
Dulles Intl to London City flights
Denver to Heathrow flights
Hobby to Heathrow flights
Boston to London City flights
Los Angeles to Stansted flights
Philadelphia to Heathrow flights
Baltimore to Gatwick flights
Boston to Stansted flights
Reagan-National to Gatwick flights
George Bush Intcntl to Heathrow flights
O'Hare Intl to Gatwick flights
San Francisco to Gatwick flights
Los Angeles to London City flights
O'Hare Intl to London City flights
Raleigh to Heathrow flights
O'Hare Intl to Stansted flights
Sky Harbor Intl to Heathrow flights
San Francisco to Stansted flights
Seattle to Gatwick flights
San Francisco to London City flights
Charlotte to Heathrow flights
Orlando to Gatwick flights

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

When you search for this flight from Montana to Heathrow, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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Millions of users choose and trust Cheapflights to book the best flight deals from Montana to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

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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Not ready to book yet? You can track prices for flights from Montana to Heathrow on Cheapflights with our Price Alert feature and get notified when better prices are available.

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