When did momondo last update prices for flights from Helena Airport to London?

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

How old do you have to be to fly from Helena Airport to London?

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 Helena Airport to London.

What documentation or ID do you need to fly to London?

The required travel and health documents for your London trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

£343 Cheap Flights from Helena to London in 2026

Find the cheapest flights from Helena to London

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One-way

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Enter your travel dates to find the best prices.

14:30 - 16:50HLN Helena-LHR London Heathrow

43h 20m2 stops Denver Intl Frankfurt am Main

11:35 - 20:59LHR London Heathrow-HLN Helena

16h 24m1 stop Denver Intl

£580United Airlines

Mon, 7 Dec - Thu, 10 Dec

07:00 - 08:25HLN Helena-LHR London Heathrow

42h 25m2 stops Denver Intl Newark

07:30 - 20:59LHR London Heathrow-HLN Helena

20h 29m2 stops Frankfurt am Main Denver Intl

£624United Airlines

Mon, 7 Dec - Thu, 10 Dec

06:28 - 09:40HLN Helena-LHR London Heathrow

20h 12m1 stop Denver Intl

07:30 - 20:59LHR London Heathrow-HLN Helena

20h 29m2 stops Frankfurt am Main Denver Intl

£658United Airlines

Sun, 15 Nov - Wed, 9 Dec

06:28 - 07:10HLN Helena-LHR London Heathrow

17h 42m2 stops Denver Intl Montreal Pierre Elliott Trudeau Intl

07:30 - 20:59LHR London Heathrow-HLN Helena

20h 29m2 stops Frankfurt am Main Denver Intl

£660United Airlines

Sun, 15 Nov - Wed, 9 Dec

14:30 - 21:20HLN Helena-LHR London Heathrow

23h 50m2 stops Denver Intl Newark

07:30 - 20:59LHR London Heathrow-HLN Helena

20h 29m2 stops Frankfurt am Main Denver Intl

£661United Airlines

Sat, 5 Dec - Wed, 9 Dec

16:08 - 12:20HLN Helena-LHR London Heathrow

13h 12m1 stop Seattle/Tacoma Intl

14:45 - 15:31LHR London Heathrow-HLN Helena

31h 46m1 stop Seattle/Tacoma Intl

£661Alaska Airlines

Mon, 7 Dec - Thu, 10 Dec

07:00 - 09:40HLN Helena-LHR London Heathrow

19h 40m1 stop Denver Intl

15:00 - 13:27LHR London Heathrow-HLN Helena

29h 27m2 stops Toronto Pearson Intl Denver Intl

£667United Airlines

Wed, 6 Jan - Tue, 12 Jan

07:00 - 09:10HLN Helena-LHR London Heathrow

19h 10m2 stops Denver Intl Newark

11:10 - 20:59LHR London Heathrow-HLN Helena

40h 49m2 stops Toronto Pearson Intl Denver Intl

£670United Airlines

Wed, 6 Jan - Wed, 13 Jan

07:00 - 06:30HLN Helena-LHR London Heathrow

16h 30m2 stops Denver Intl Toronto Pearson Intl

15:00 - 20:59LHR London Heathrow-HLN Helena

36h 59m2 stops Toronto Pearson Intl Denver Intl

£672United Airlines

Wed, 6 Jan - Tue, 12 Jan

14:30 - 09:40HLN Helena-LHR London Heathrow

12h 10m1 stop Denver Intl

07:30 - 20:59LHR London Heathrow-HLN Helena

20h 29m2 stops Frankfurt am Main Denver Intl

£695United Airlines

Sat, 5 Dec - Wed, 9 Dec

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United Airlines flights from Helena to London

Our best United Airlines deals on Helena to London flight tickets

United Airlines

7 Dec

HLN14:30Helena

43h 20m

2 stops

LHR16:50London Heathrow

10 Dec

LHR11:35London Heathrow

16h 24m

1 stop

HLN20:59Helena

£580

United Airlines

7 Dec

HLN07:00Helena

42h 25m

2 stops

LHR08:25London Heathrow

10 Dec

LHR07:30London Heathrow

20h 29m

2 stops

HLN20:59Helena

£624

United Airlines

15 Nov

HLN06:28Helena

20h 12m

1 stop

LHR09:40London Heathrow

9 Dec

LHR07:30London Heathrow

20h 29m

2 stops

HLN20:59Helena

£658

Alaska Airlines flights from Helena to London

Our best Alaska Airlines deals on Helena to London flight tickets

Alaska Airlines

6 Jan

HLN16:08Helena

13h 12m

1 stop

LHR12:20London Heathrow

12 Jan

LHR14:45London Heathrow

31h 46m

1 stop

HLN15:31Helena

£661

Alaska Airlines

5 Dec

HLN16:08Helena

13h 12m

1 stop

LHR12:20London Heathrow

9 Dec

LHR14:45London Heathrow

31h 46m

1 stop

HLN15:31Helena

£698

Alaska Airlines

25 Aug

HLN17:11Helena

14h 54m

1 stop

LHR15:05London Heathrow

7 Sept

LHR17:00London Heathrow

30h 41m

1 stop

HLN16:41Helena

£824

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

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

£580

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Mon 7/12

07:00-08:25

2 stops42h 25m

London Heathrow

Thu 10/12

07:30-20:59

2 stops20h 29m

£624

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Sun 15/11

06:28-09:40

1 stop20h 12m

London Heathrow

Wed 9/12

07:30-20:59

2 stops20h 29m

£658

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Sun 15/11

06:28-07:10

2 stops17h 42m

London Heathrow

Wed 9/12

07:30-20:59

2 stops20h 29m

£660

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Sat 5/12

14:30-21:20

2 stops23h 50m

London Heathrow

Wed 9/12

07:30-20:59

2 stops20h 29m

£661

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Mon 7/12

16:08-12:20

1 stop13h 12m

London Heathrow

Thu 10/12

14:45-15:31

1 stop31h 46m

£661

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Wed 6/1

07:00-09:40

1 stop19h 40m

London Heathrow

Tue 12/1

15:00-13:27

2 stops29h 27m

£667

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Wed 6/1

07:00-09:10

2 stops19h 10m

London Heathrow

Wed 13/1

11:10-20:59

2 stops40h 49m

£670

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Wed 6/1

07:00-06:30

2 stops16h 30m

London Heathrow

Tue 12/1

15:00-20:59

2 stops36h 59m

£672

Fastest return journey

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Sat 5/12

14:30-09:40

1 stop12h 10m

London Heathrow

Wed 9/12

07:30-20:59

2 stops20h 29m

£695

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Helena to London

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

What is the cheapest airline that flies from Helena to London?

United Airlines and Delta are the most popular carriers operating from Helena to London

When to book flights from Helena to London

Are you open to changing your travel dates? Check out the ideal times to fly from Helena to London according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Helena to London (HLN to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Helena to London

Fastest flight time	12h 14m
Direct flights	None

The fastest flight from Helena to London takes 12h 14m

There are no direct flights from Helena to London. There are no popular flight routes from Helena to London.

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Frequently asked questions about flying from Helena to London

How far is Helena to London by plane?
There are 4547.6 mi between Helena and London. A reasonable flight in good conditions will take 12h 14m.
When did momondo last update prices for flights from Helena Airport to London?
Prices for flights from Helena Airport to London are refreshed on a daily basis.
How old do you have to be to fly from Helena Airport to London?
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 Helena Airport to London.
What documentation or ID do you need to fly to London?
The required travel and health documents for your London trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Eastbourne

Wembley

Gatwick

Milton Keynes

Luton

Southend-on-Sea

Slough

Ipswich

Maidstone

Folkestone

Ilford

Hastings

Canterbury

Chichester

Hayes

Guildford

Bedford

Harlow

Colchester

Chelmsford

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Helena to London . Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Helena to London flights to just show those with flexible booking policies.

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

Once you have performed a search for Helena to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of Helena to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Cheap flights from Helena to London from £343

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to London departing on 6/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names, great deals

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Filter for what you want

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United Airlines flights from Helena to London

Our best United Airlines deals on Helena to London flight tickets

Alaska Airlines flights from Helena to London

Our best Alaska Airlines deals on Helena to London flight tickets

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How to get the cheapest flight ticket from Helena to London

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Cheap Helena to London (HLN to LON) flight deals and tips

Fastest flight time

Direct flights

Frequently asked questions about flying from Helena to London

Travelling to a place near London?

Why use momondo?

An easier way to manage your London trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London

Cabin classes currently available on flights to London

List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

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