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Cheap flights from Helena to London from $628

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to London departing on 1/23. 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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Find the cheapest flights from Helena to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:15 am - 9:40 am
HLN
-
LHR
20h 25m1 stop
United Airlines Logo
6:35 am - 9:26 pm
LHR
-
HLN
21h 51m2 stops
$628United Airlines
Fri, Jan 23 - Tue, Jan 27
United Airlines Logo
2:27 pm - 9:40 am
HLN
-
LHR
12h 13m1 stop
United Airlines Logo
6:35 am - 9:26 pm
LHR
-
HLN
21h 51m2 stops
$629United Airlines
Fri, Jan 23 - Tue, Jan 27
United Airlines Logo
2:27 pm - 8:35 pm
HLN
-
LHR
23h 08m2 stops
United Airlines Logo
6:35 am - 1:41 pm
LHR
-
HLN
38h 06m2 stops
$633United Airlines
Fri, Jan 23 - Tue, Jan 27
United Airlines Logo
2:27 pm - 9:40 am
HLN
-
LHR
12h 13m1 stop
United Airlines Logo
11:35 am - 9:26 pm
LHR
-
HLN
16h 51m1 stop
$657United Airlines
Fri, Jan 23 - Tue, Jan 27
United Airlines Logo
2:30 pm - 9:40 am
HLN
-
LHR
12h 10m1 stop
United Airlines Logo
2:05 pm - 8:59 pm
LHR
-
HLN
37h 54m2 stops
$753United Airlines
Fri, May 1 - Mon, May 11
United Airlines Logo
2:30 pm - 8:40 pm
HLN
-
LHR
23h 10m2 stops
United Airlines Logo
2:05 pm - 8:59 pm
LHR
-
HLN
37h 54m2 stops
$758United Airlines
Fri, May 1 - Mon, May 11
United Airlines Logo
2:30 pm - 12:20 pm
HLN
-
LHR
14h 50m1 stop
United Airlines Logo
11:25 am - 8:59 pm
LHR
-
HLN
16h 34m1 stop
$773United Airlines
Fri, May 1 - Mon, May 11
Multiple Airlines Logo
4:10 pm - 6:50 am
HLN
-
LHR
31h 40m2 stops
Multiple Airlines Logo
4:35 pm - 3:38 pm
LHR
-
HLN
30h 03m2 stops
$782Multiple Airlines
Fri, May 1 - Mon, May 11

United Airlines flights from Helena to London Heathrow Airport

Our best United Airlines deals on Helena to London Heathrow Airport flight tickets
United Airlines
Jan 23
HLN6:15 amHelena
20h 25m
1 stop
LHR9:40 amLondon Heathrow
Jan 27
LHR6:35 amLondon Heathrow
21h 51m
2 stops
HLN9:26 pmHelena
$628
Find similar
United Airlines
Jan 23
HLN2:27 pmHelena
12h 13m
1 stop
LHR9:40 amLondon Heathrow
Jan 27
LHR6:35 amLondon Heathrow
21h 51m
2 stops
HLN9:26 pmHelena
$629
Find similar
United Airlines
Jan 23
HLN2:27 pmHelena
23h 08m
2 stops
LHR8:35 pmLondon Heathrow
Jan 27
LHR6:35 amLondon Heathrow
38h 06m
2 stops
HLN1:41 pmHelena
$633
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Helena 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 December 21, 2025.
Use the filters below to find and compare flights from Helena to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 1/23

6:15 am-9:40 am

1 stop20h 25m

London Heathrow

Tue 1/27

6:35 am-9:26 pm

2 stops21h 51m

$628

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 1/23

2:27 pm-9:40 am

1 stop12h 13m

London Heathrow

Tue 1/27

6:35 am-9:26 pm

2 stops21h 51m

$629

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 1/23

2:27 pm-8:35 pm

2 stops23h 08m

London Heathrow

Tue 1/27

6:35 am-1:41 pm

2 stops38h 06m

$633

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 1/23

2:27 pm-9:40 am

1 stop12h 13m

London Heathrow

Tue 1/27

11:35 am-9:26 pm

1 stop16h 51m

$657

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 5/1

2:30 pm-9:40 am

1 stop12h 10m

London Heathrow

Mon 5/11

2:05 pm-8:59 pm

2 stops37h 54m

$753

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 5/1

2:30 pm-8:40 pm

2 stops23h 10m

London Heathrow

Mon 5/11

2:05 pm-8:59 pm

2 stops37h 54m

$758

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 5/1

2:30 pm-12:20 pm

1 stop14h 50m

London Heathrow

Mon 5/11

11:25 am-8:59 pm

1 stop16h 34m

$773

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 5/1

4:10 pm-6:50 am

2 stops31h 40m

London Heathrow

Mon 5/11

4:35 pm-3:38 pm

2 stops30h 03m

$782

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to London from

How to get the cheapest flight ticket from Helena 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

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Monday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $747. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $1,066.

When to book flights from Helena to London Heathrow Airport

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

Cheap Helena to London Heathrow Airport (HLN to LHR) flight deals and tips

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

Fastest flight time

12h 10m

Direct flights

None
The fastest flight from Helena to London Heathrow Airport takes 12h 10m
There are no direct flights from Helena to London Heathrow Airport. There are no popular flight routes from Helena to London Heathrow Airport.
Search flight deals

  • How far is Helena to London Heathrow by plane?

    The distance between Helena and London Heathrow is about 4539.0 mi. 12h 10m is a normal flight duration for this route.

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

    Prices for flights from Helena Airport to London Heathrow Airport were last updated today.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Helena Airport to London Heathrow Airport.

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

    The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near London?

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

Why use momondo?

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

Finding the right flight to London from Helena is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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

Yes. All flights to London from Helena on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once all potential Helena to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to London from Helena. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your London Heathrow Airport trip

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