Cheap flights from Montana to London from $334

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Montana to London departing on 7/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
8:40 am - 12:50 pm
COD
-
LHR
21h 10m
2 stops
United Airlines Logo
8:30 am - 12:53 pm
LHR
-
COD
35h 23m
2 stops
$799United Airlines
Wed, Sep 30 - Fri, Oct 2
United Airlines Logo
1:28 pm - 11:35 am
COD
-
LHR
39h 07m
2 stops
United Airlines Logo
7:30 am - 9:38 pm
LHR
-
COD
21h 08m
2 stops
$812United Airlines
Tue, Sep 29 - Fri, Oct 2
Delta Logo
8:30 am - 12:10 pm
BZN
-
LHR
20h 40m
1 stop
Delta Logo
8:40 am - 11:53 pm
LHR
-
BZN
22h 13m
2 stops
$877Delta
Wed, Sep 2 - Tue, Sep 15
Delta Logo
6:00 am - 10:40 am
BZN
-
LHR
21h 40m
2 stops
Delta Logo
8:40 am - 11:53 pm
LHR
-
BZN
22h 13m
2 stops
$881Delta
Tue, Sep 1 - Tue, Sep 15
Air Canada Logo
7:00 am - 8:35 am
BIL
-
LHR
42h 35m
2 stops
Air Canada Logo
5:40 pm - 9:41 am
LHR
-
BIL
47h 01m
2 stops
$898Air Canada
Mon, Aug 31 - Wed, Sep 16
Air Canada Logo
5:57 pm - 9:35 am
BIL
-
LHR
56h 38m
2 stops
Air Canada Logo
5:40 pm - 9:41 am
LHR
-
BIL
47h 01m
2 stops
$904Air Canada
Sun, Aug 30 - Wed, Sep 16
Multiple Airlines Logo
5:18 pm - 6:55 am
HLN
-
LHR
30h 37m
2 stops
Multiple Airlines Logo
4:25 pm - 3:31 pm
LHR
-
HLN
30h 06m
2 stops
$908Multiple Airlines
Tue, Sep 29 - Tue, Oct 6
Lufthansa Logo
2:25 pm - 4:40 pm
BIL
-
LHR
19h 15m
2 stops
Lufthansa Logo
8:25 pm - 9:00 pm
LHR
-
BIL
31h 35m
2 stops
$912Lufthansa
Wed, Sep 2 - Mon, Sep 14
Multiple Airlines Logo
6:15 am - 6:30 am
MSO
-
LHR
17h 15m
2 stops
Multiple Airlines Logo
5:40 pm - 1:27 pm
LHR
-
MSO
26h 47m
2 stops
$945Multiple Airlines
Wed, Sep 2 - Sun, Sep 13
Lufthansa Logo
12:30 pm - 6:45 am
GTF
-
LHR
35h 15m
1 stop
Lufthansa Logo
2:50 pm - 9:28 pm
LHR
-
GTF
13h 38m
1 stop
$1,025Lufthansa
Sat, Aug 1 - Thu, Aug 13

United Airlines flights from Montana to London Heathrow Airport

Our best United Airlines deals on Montana to London Heathrow Airport flight tickets
United Airlines
Sep 30
COD8:40 amCody E.E. Faust
21h 10m
2 stops
LHR12:50 pmLondon Heathrow
Oct 2
LHR8:30 amLondon Heathrow
35h 23m
2 stops
COD12:53 pmCody E.E. Faust
$799
United Airlines
Sep 29
COD1:28 pmCody E.E. Faust
39h 07m
2 stops
LHR11:35 amLondon Heathrow
Oct 2
LHR7:30 amLondon Heathrow
21h 08m
2 stops
COD9:38 pmCody E.E. Faust
$812
United Airlines
Sep 1
BIL2:25 pmBillings Logan Intl
12h 15m
1 stop
LHR9:40 amLondon Heathrow
Sep 15
LHR6:55 amLondon Heathrow
17h 21m
2 stops
BIL5:16 pmBillings Logan Intl
$877

Delta flights from Montana to London Heathrow Airport

Our best Delta deals on Montana to London Heathrow Airport flight tickets
Delta
Sep 2
BZN8:30 amBozeman Gallatin Field
20h 40m
1 stop
LHR12:10 pmLondon Heathrow
Sep 15
LHR8:40 amLondon Heathrow
22h 13m
2 stops
BZN11:53 pmBozeman Gallatin Field
$877
Delta
Sep 1
BZN6:00 amBozeman Gallatin Field
21h 40m
2 stops
LHR10:40 amLondon Heathrow
Sep 15
LHR8:40 amLondon Heathrow
22h 13m
2 stops
BZN11:53 pmBozeman Gallatin Field
$881
Delta
Sep 1
BZN8:30 amBozeman Gallatin Field
24h 05m
1 stop
LHR3:35 pmLondon Heathrow
Sep 15
LHR6:30 amLondon Heathrow
22h 54m
2 stops
BZN10:24 pmBozeman Gallatin Field
$882

momondo Fare Finder

 
Customize your flight search to find flights from Montana to London Heathrow Airport 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, momondo users made 832,500 searches. Data last updated April 14, 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 round-trip

CodyLondon

COD - LHR

CODLHR

Cody E.E. Faust

Wed 9/30

8:40 am-12:50 pm

2 stops21h 10m

London Heathrow

Fri 10/2

8:30 am-12:53 pm

2 stops35h 23m

$799

CodyLondon

COD - LHR

CODLHR

Cody E.E. Faust

Tue 9/29

1:28 pm-11:35 am

2 stops39h 07m

London Heathrow

Fri 10/2

7:30 am-9:38 pm

2 stops21h 08m

$812
Quickest round-trip

BozemanLondon

BZN - LHR

BZNLHR

Bozeman Gallatin Field

Wed 9/2

8:30 am-12:10 pm

1 stop20h 40m

London Heathrow

Tue 9/15

8:40 am-11:53 pm

2 stops22h 13m

$877

BozemanLondon

BZN - LHR

BZNLHR

Bozeman Gallatin Field

Tue 9/1

6:00 am-10:40 am

2 stops21h 40m

London Heathrow

Tue 9/15

8:40 am-11:53 pm

2 stops22h 13m

$881

BillingsLondon

BIL - LHR

BILLHR

Billings Logan Intl

Mon 8/31

7:00 am-8:35 am

2 stops42h 35m

London Heathrow

Wed 9/16

5:40 pm-9:41 am

2 stops47h 01m

$898

BillingsLondon

BIL - LHR

BILLHR

Billings Logan Intl

Sun 8/30

5:57 pm-9:35 am

2 stops56h 38m

London Heathrow

Wed 9/16

5:40 pm-9:41 am

2 stops47h 01m

$904

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 9/29

5:18 pm-6:55 am

2 stops30h 37m

London Heathrow

Tue 10/6

4:25 pm-3:31 pm

2 stops30h 06m

$908

BillingsLondon

BIL - LHR

BILLHR

Billings Logan Intl

Wed 9/2

2:25 pm-4:40 pm

2 stops19h 15m

London Heathrow

Mon 9/14

8:25 pm-9:00 pm

2 stops31h 35m

$912

MissoulaLondon

MSO - LHR

MSOLHR

Missoula Johnson-Bell Field

Wed 9/2

6:15 am-6:30 am

2 stops17h 15m

London Heathrow

Sun 9/13

5:40 pm-1:27 pm

2 stops26h 47m

$945

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sat 8/1

12:30 pm-6:45 am

1 stop35h 15m

London Heathrow

Thu 8/13

2:50 pm-9:28 pm

1 stop13h 38m

$1,025

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Montana to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on Montana to London Heathrow Airport flights?

You could potentially save up to 2% on your flight if you consider stops on a Montana to London Heathrow Airport flight.

Cheap Montana to London Heathrow Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Montana to London Heathrow Airport

Fastest flight time

11h 25m

Direct flights

None
The fastest flight from Montana to London Heathrow Airport takes 11h 25m
There are no direct flights from Montana to London Heathrow Airport. There are no popular flight routes from Montana to London Heathrow Airport.

Frequently asked questions about flying from Montana to London Heathrow Airport

  • When did momondo last update prices for flights from Montana to London Heathrow Airport?

    Prices for flights from Montana to London Heathrow Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Montana to London Heathrow Airport?

  • How old do you have to be to fly from Montana to London Heathrow Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Montana to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Montana to London Heathrow Airport

Compare and see reviews for airlines that fly from Montana to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $604Free CancellationRating
7.9
8,405 reviews
Search Delta flights
United AirlinesPriceFrom $645Free CancellationRating
7.4
9,581 reviews
Search United Airlines flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Luton
Dover
Hayes
Slough
Stratford-upon-Avon
Crawley
Wembley
Stansted
Croydon
Dartford
Brentwood
Cobham
Folkestone
Guildford
Romford
Harrow
Watford

Why use momondo?

Why should I use momondo to find a flight deal from Montana to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Montana to London for you.

Can I find flights from Montana to London with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to London from Montana with this policy.

How can momondo help me find flights from Montana to London?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Montana.

I’m not ready to book a flight from Montana to London right now. Can momondo alert me if prices change?

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Montana and alert you when they change.

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Thu 5/14
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