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Cheap flights from Montana to London Heathrow Airport from £247

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 18/8. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — LHR
29 May — 5 Jun1
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 29 April 2026.

Mon 16/1117:51
BIL
-
LHR
2 stops30h 39m
United Airlines
Thu 19/1106:35
LHR
-
BIL
2 stops21h 16m
United Airlines
Deal found 24/4£603
Mon 16/1114:30
HLN
-
LHR
2 stops42h 20m
United Airlines
Thu 19/1107:30
LHR
-
HLN
2 stops20h 29m
United Airlines
Deal found 27/4£618
Sun 15/1114:25
GTF
-
LHR
2 stops59h 20m
United Airlines
Thu 19/1108:00
LHR
-
GTF
2 stops21h 30m
United Airlines
Deal found 27/4£642
Sun 9/816:54
BZN
-
LHR
1 stop12h 21m
American Airlines
Thu 20/808:15
LHR
-
BZN
2 stops19h 22m
American Airlines
Deal found 24/4£644
Wed 2/915:40
BZN
-
LHR
1 stop16h 55m
Multiple Airlines
Wed 16/911:45
LHR
-
BZN
2 stops17h 39m
Multiple Airlines
Deal found 27/4£650
Wed 19/815:00
FCA
-
LHR
1 stop15h 05m
Delta
Wed 26/806:30
LHR
-
FCA
2 stops23h 32m
Delta
Deal found 29/4£650
Wed 2/911:27
BZN
-
LHR
2 stops16h 13m
Virgin Atlantic
Wed 16/911:45
LHR
-
BZN
2 stops17h 39m
Virgin Atlantic
Deal found 27/4£653
Wed 2/905:45
BIL
-
LHR
2 stops21h 35m
Delta
Wed 16/906:30
LHR
-
BIL
2 stops20h 07m
Delta
Deal found 27/4£653
Tue 15/918:10
MSO
-
LHR
2 stops19h 00m
Delta
Tue 22/906:30
LHR
-
MSO
2 stops17h 53m
Delta
Deal found 26/4£653
Tue 1/918:25
BIL
-
LHR
2 stops28h 55m
Delta
Tue 15/906:30
LHR
-
BIL
2 stops22h 57m
Delta
Deal found 28/4£653
Sat 29/810:25
BZN
-
LHR
2 stops27h 55m
United Airlines
Mon 31/815:30
LHR
-
BZN
2 stops36h 37m
United Airlines
Deal found 28/4£656
Wed 21/1018:10
FCA
-
LHR
2 stops16h 25m
KLM
Mon 26/1020:25
LHR
-
FCA
2 stops27h 20m
KLM
Deal found 26/4£656

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 29 April 2026.

Round-trip from

£644

One-way from

£247

Popular in

July

Cheapest in

November

Average price

£723
American Airlines
  • American Airlines
  • 9/8-20/8
  • 3 total stops
  • 31h 43m total
  • Montana to London
Search Deals
American Airlines
  • American Airlines
  • 18/8
  • 1 total stop
  • 15h 10m total
  • Montana to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£164 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£28 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 29 April 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

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 21/10

11:59-10:00

1 stop15h 01m

London Heathrow

Mon 26/10

20:25-17:45

2 stops27h 20m

£650

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 19/8

15:00-13:05

1 stop15h 05m

London Heathrow

Wed 26/8

06:30-23:02

2 stops23h 32m

£650

BillingsLondon

BIL - LHR

BILLHR

Billings Logan Intl

Wed 2/9

05:45-10:20

2 stops21h 35m

London Heathrow

Wed 16/9

06:30-19:37

2 stops20h 07m

£653

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Tue 15/9

18:10-20:10

2 stops19h 00m

London Heathrow

Tue 22/9

06:30-17:23

2 stops17h 53m

£653

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Tue 15/9

10:30-12:25

1 stop18h 55m

London Heathrow

Tue 22/9

09:30-13:27

2 stops34h 57m

£657

BozemanLondon

BZN - LHR

BZNLHR

Bozeman Gallatin Field

Sun 13/9

15:40-15:35

1 stop16h 55m

London Heathrow

Tue 29/9

10:55-17:52

1 stop13h 57m

£670

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 19/8

15:00-13:05

1 stop15h 05m

London Heathrow

Wed 26/8

10:55-23:02

1 stop19h 07m

£671

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Sun 6/9

17:32-12:35

1 stop12h 03m

London Heathrow

Thu 10/9

11:25-21:26

1 stop17h 01m

£672

BillingsLondon

BIL - LHR

BILLHR

Billings Logan Intl

Wed 2/9

11:35-10:20

2 stops15h 45m

London Heathrow

Wed 16/9

10:55-17:48

1 stop13h 53m

£674

BillingsLondon

BIL - LHR

BILLHR

Billings Logan Intl

Fri 4/9

06:15-13:05

1 stop23h 50m

London Heathrow

Wed 16/9

06:30-19:37

2 stops20h 07m

£690

Flights are sorted by cheapest return flights first.

Deals found on 27/4

Showing 1-10 of 60 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?

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 12h 03m. The time it takes to get you to your destination can typically vary by up to 3h 02m. Airlines will cover a distance of 4583 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
Milton Keynes
Wembley
Croydon
Northampton
Hounslow
Luton
Gatwick
Ilford
Slough
Hayes
Brentford
Colchester
Romford
Watford
Kingston upon Thames
Eastbourne
Swindon
Ipswich
Southend-on-Sea
Guildford

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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Boston to Stansted flights
Dulles Intl to London City flights
Los Angeles to London City flights
Baltimore to Gatwick flights
Philadelphia to Heathrow flights
Reagan-National to Gatwick flights
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O'Hare Intl to Gatwick flights
LaGuardia to Stansted flights
San Francisco to Gatwick flights
San Francisco to London City flights
Minneapolis to Heathrow flights
Austin to Heathrow flights
Seattle to Gatwick flights
O'Hare Intl to London City flights
San Francisco to Stansted flights
O'Hare Intl to Stansted flights

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

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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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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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