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Cheap flights from Helena to London from $668

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 3/19. 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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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 - 10:50 am
HLN
-
LHR
22h 35m
2 stops
United Airlines Logo
11:35 am - 9:25 pm
LHR
-
HLN
15h 50m
1 stop
$668United Airlines
Thu, Mar 19 - Thu, Mar 26
United Airlines Logo
2:25 pm - 6:30 am
HLN
-
LHR
33h 05m
2 stops
United Airlines Logo
7:25 am - 9:33 pm
LHR
-
HLN
21h 08m
2 stops
$703United Airlines
Sat, Apr 4 - Sat, Apr 18
United Airlines Logo
2:25 pm - 6:30 am
HLN
-
LHR
33h 05m
2 stops
United Airlines Logo
7:25 am - 9:33 pm
LHR
-
HLN
21h 08m
2 stops
$705United Airlines
Sat, Apr 4 - Sat, Apr 18
United Airlines Logo
2:25 pm - 10:00 am
HLN
-
LHR
36h 35m
2 stops
United Airlines Logo
2:50 pm - 9:33 pm
LHR
-
HLN
13h 43m
1 stop
$732United Airlines
Sat, Apr 4 - Sat, Apr 18
United Airlines Logo
2:30 pm - 9:40 am
HLN
-
LHR
13h 10m
1 stop
United Airlines Logo
5:40 pm - 9:33 pm
LHR
-
HLN
34h 53m
2 stops
$734United Airlines
Tue, Mar 24 - Tue, Mar 31
United Airlines Logo
2:30 pm - 9:40 am
HLN
-
LHR
13h 10m
1 stop
United Airlines Logo
2:50 pm - 9:33 pm
LHR
-
HLN
13h 43m
1 stop
$749United Airlines
Tue, Mar 24 - Tue, Mar 31
KLM Logo
1:02 pm - 10:30 am
HLN
-
LHR
15h 28m
2 stops
KLM Logo
9:55 am - 10:30 pm
LHR
-
HLN
19h 35m
2 stops
$753KLM
Tue, Mar 24 - Tue, Mar 31
United Airlines Logo
2:25 pm - 9:40 am
HLN
-
LHR
12h 15m
1 stop
United Airlines Logo
9:30 am - 9:33 pm
LHR
-
HLN
19h 03m
2 stops
$761United Airlines
Sat, Apr 4 - Sat, Apr 18
United Airlines Logo
2:30 pm - 9:40 am
HLN
-
LHR
13h 10m
1 stop
United Airlines Logo
11:35 am - 9:25 pm
LHR
-
HLN
15h 50m
1 stop
$764United Airlines
Thu, Mar 19 - Thu, Mar 26
United Airlines Logo
2:25 pm - 9:40 am
HLN
-
LHR
12h 15m
1 stop
United Airlines Logo
2:50 pm - 9:33 pm
LHR
-
HLN
13h 43m
1 stop
$778United Airlines
Sat, Apr 4 - Sat, Apr 18

United Airlines flights from Helena to London Heathrow Airport

Our best United Airlines deals on Helena to London Heathrow Airport flight tickets
United Airlines
Mar 19
HLN6:15 amHelena
22h 35m
2 stops
LHR10:50 amLondon Heathrow
Mar 26
LHR11:35 amLondon Heathrow
15h 50m
1 stop
HLN9:25 pmHelena
$668
United Airlines
Apr 4
HLN2:25 pmHelena
33h 05m
2 stops
LHR6:30 amLondon Heathrow
Apr 18
LHR7:25 amLondon Heathrow
21h 08m
2 stops
HLN9:33 pmHelena
$703
United Airlines
Apr 4
HLN2:25 pmHelena
33h 05m
2 stops
LHR6:30 amLondon Heathrow
Apr 18
LHR7:25 amLondon Heathrow
21h 08m
2 stops
HLN9:33 pmHelena
$705

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 February 5, 2026.
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

Thu 3/19

6:15 am-10:50 am

2 stops22h 35m

London Heathrow

Thu 3/26

11:35 am-9:25 pm

1 stop15h 50m

$668

HelenaLondon

HLN - LHR

HLNLHR

Helena

Sat 4/4

2:25 pm-6:30 am

2 stops33h 05m

London Heathrow

Sat 4/18

7:25 am-9:33 pm

2 stops21h 08m

$703

HelenaLondon

HLN - LHR

HLNLHR

Helena

Sat 4/4

2:25 pm-6:30 am

2 stops33h 05m

London Heathrow

Sat 4/18

7:25 am-9:33 pm

2 stops21h 08m

$705

HelenaLondon

HLN - LHR

HLNLHR

Helena

Sat 4/4

2:25 pm-10:00 am

2 stops36h 35m

London Heathrow

Sat 4/18

2:50 pm-9:33 pm

1 stop13h 43m

$732

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 3/24

2:30 pm-9:40 am

1 stop13h 10m

London Heathrow

Tue 3/31

5:40 pm-9:33 pm

2 stops34h 53m

$734

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 3/24

2:30 pm-9:40 am

1 stop13h 10m

London Heathrow

Tue 3/31

2:50 pm-9:33 pm

1 stop13h 43m

$749

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 3/24

1:02 pm-10:30 am

2 stops15h 28m

London Heathrow

Tue 3/31

9:55 am-10:30 pm

2 stops19h 35m

$753

HelenaLondon

HLN - LHR

HLNLHR

Helena

Sat 4/4

2:25 pm-9:40 am

1 stop12h 15m

London Heathrow

Sat 4/18

9:30 am-9:33 pm

2 stops19h 03m

$761

HelenaLondon

HLN - LHR

HLNLHR

Helena

Thu 3/19

2:30 pm-9:40 am

1 stop13h 10m

London Heathrow

Thu 3/26

11:35 am-9:25 pm

1 stop15h 50m

$764

HelenaLondon

HLN - LHR

HLNLHR

Helena

Sat 4/4

2:25 pm-9:40 am

1 stop12h 15m

London Heathrow

Sat 4/18

2:50 pm-9:33 pm

1 stop13h 43m

$778

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

18h 25m

Direct flights

None
The fastest flight from Helena to London Heathrow Airport takes 18h 25m
There are no direct flights from Helena to London Heathrow Airport. There are no popular flight routes from Helena to London Heathrow Airport.
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  • How far is Helena to London Heathrow by plane?

    The distance between Helena and London Heathrow is about 4539.0 mi. 18h 25m 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.

  • How do I get Price Alerts for flights from Helena to London Heathrow Airport?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Helena from London Heathrow Airport. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Helena to London Heathrow Airport with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

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
Slough
Guildford
Crawley
Wembley
Dartford
Stratford-upon-Avon
Hayes
Croydon
Brentwood
Harrow
Watford
Cobham
Folkestone
Romford
Stansted

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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