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$355+ Cheap flights from Montana to London (LON)

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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — LON
May 11 — May 181
Mon 5/11
Mon 5/18
1 adult, Economy
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Cheap flight deals from Montana to London

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 April 11, 2026.

This United Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/308:40 am
COD
-
LHR
2 stops21h 10m
United Airlines
Fri 10/28:30 am
LHR
-
COD
2 stops35h 23m
United Airlines
Deal found 4/10$799
This United Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/291:28 pm
COD
-
LHR
2 stops39h 07m
United Airlines
Fri 10/27:30 am
LHR
-
COD
2 stops21h 08m
United Airlines
Deal found 4/10$812
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:30 am
BZN
-
LHR
1 stop20h 40m
Delta
Tue 9/158:40 am
LHR
-
BZN
2 stops22h 13m
Delta
Deal found 4/10$877
This United Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/12:25 pm
BIL
-
LHR
1 stop12h 15m
United Airlines
Tue 9/156:55 am
LHR
-
BIL
2 stops17h 21m
United Airlines
Deal found 4/10$877
This United Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/25:32 pm
MSO
-
LHR
1 stop12h 03m
United Airlines
Tue 9/156:55 am
LHR
-
MSO
2 stops21h 31m
United Airlines
Deal found 4/10$879
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:00 am
BZN
-
LHR
2 stops21h 40m
Delta
Tue 9/158:40 am
LHR
-
BZN
2 stops22h 13m
Delta
Deal found 4/10$881
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:15 am
BIL
-
LHR
2 stops21h 25m
Delta
Wed 9/166:30 am
LHR
-
BIL
2 stops22h 57m
Delta
Deal found 4/10$881
This United Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/315:57 pm
BIL
-
LHR
1 stop32h 43m
United Airlines
Tue 9/156:55 am
LHR
-
BIL
2 stops17h 21m
United Airlines
Deal found 4/10$882
This United Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/291:28 pm
COD
-
LHR
1 stop13h 12m
United Airlines
Thu 10/17:30 am
LHR
-
COD
2 stops36h 23m
United Airlines
Deal found 4/10$885
This United Airlines deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/292:37 pm
BZN
-
LHR
1 stop14h 48m
United Airlines
Tue 10/67:30 am
LHR
-
BZN
2 stops20h 37m
United Airlines
Deal found 4/9$886
This United Airlines deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/292:30 pm
HLN
-
LHR
1 stop12h 10m
United Airlines
Tue 10/65:40 pm
LHR
-
HLN
2 stops29h 25m
United Airlines
Deal found 4/9$888
This United Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/12:37 pm
BZN
-
LHR
3 stops32h 53m
United Airlines
Tue 9/152:05 pm
LHR
-
BZN
2 stops30h 23m
United Airlines
Deal found 4/10$889

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 April 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$799
(United Airlines)

One-way from

$355
(United Airlines)

Popular in

July

Cheapest in

November

Average price

$977
Provider with most accurate pricing for Bozeman Gallatin Field-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Bozeman Gallatin Field-London (LON) flights.
Search Deals
From Montana to London (LON)
Search Deals
One-way flight from Montana to London (LON)
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($299 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($50 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated April 11, 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 round-trip

BillingsLondon

BIL - LHR

BILLHR

Billings Logan Intl

Mon 8/31

5:57 pm-9:40 am

1 stop32h 43m

London Heathrow

Tue 9/15

6:55 am-5:16 pm

2 stops17h 21m

$882

CodyLondon

COD - LHR

CODLHR

Cody E.E. Faust

Tue 9/29

1:28 pm-9:40 am

1 stop13h 12m

London Heathrow

Thu 10/1

7:30 am-12:53 pm

2 stops36h 23m

$885

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 8/19

2:29 pm-9:40 am

1 stop12h 11m

London Heathrow

Wed 8/26

5:40 pm-6:48 pm

2 stops32h 08m

$890

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Tue 9/29

3:00 pm-1:05 pm

1 stop15h 05m

London Heathrow

Thu 10/22

10:55 am-5:45 pm

1 stop13h 50m

$902
Quickest round-trip

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 9/29

5:20 pm-12:25 pm

1 stop12h 05m

London Heathrow

Tue 10/6

11:25 am-8:59 pm

1 stop16h 34m

$903

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 9/29

2:25 pm-12:25 pm

1 stop15h 00m

London Heathrow

Tue 10/6

11:25 am-9:15 pm

1 stop16h 50m

$905

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 9/8

12:50 pm-1:15 pm

2 stops17h 25m

London Heathrow

Tue 9/22

10:55 am-10:34 pm

1 stop18h 39m

$907

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Tue 9/29

1:25 pm-6:55 pm

2 stops22h 30m

London Heathrow

Thu 10/22

3:15 pm-12:28 pm

1 stop28h 13m

$913

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 9/25

2:30 pm-4:40 pm

2 stops43h 10m

London Heathrow

Mon 9/28

2:05 pm-4:05 pm

2 stops33h 00m

$913

CodyLondon

COD - LHR

CODLHR

Cody E.E. Faust

Sun 8/16

6:00 pm-7:45 am

2 stops30h 45m

London Heathrow

Tue 9/22

6:55 am-5:18 pm

2 stops17h 23m

$923

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

Showing 1-10 of 60 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 round-trip 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

How much does it cost to fly round-trip from Montana to London?

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?

    A quick flight from Montana to London can take about 15h 05m. United Airlines provides one of the quickest options available for as low as $902. There are 4512 mi between Montana and London. This flight may include one or multiple stops.

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

    Most travelers choose Bozeman Gallatin Field - London Heathrow, Bozeman Gallatin Field - London City or Kalispell Glacier Park - London Heathrow 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 vacation 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.

See more FAQs

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Ilford
Hounslow
Croydon
Gatwick
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Orpington
Watford
Borehamwood
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough
Sutton
Stansted

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Montana to London

Discover the top 2 airlines that operate flights from Montana to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$604Average$856FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$645Average$964FlexibilityNo cancel feeOn-time69%

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