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$821+ Cheap flights from Helena (HLN) to London (LON)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — LON
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
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Cheap flight deals from Helena to London

Cheapest flights from Helena to London
Explore the most affordable flight options available from Helena to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 26, 2026.

This United Airlines deal was found by Cheapflights users on 1/24. 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 10/282:30 pm
HLN
-
LHR
1 stop13h 10m
United Airlines
Wed 11/116:35 am
LHR
-
HLN
2 stops37h 52m
United Airlines
Deal found 1/24$821
This KLM deal was found by Cheapflights users on 1/24. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2812:50 pm
HLN
-
LHR
2 stops15h 40m
Multiple Airlines
Wed 11/116:20 am
LHR
-
HLN
2 stops23h 21m
Multiple Airlines
Deal found 1/24$826
This United Airlines deal was found by Cheapflights users on 1/23. 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.
Fri 1/306:15 am
HLN
-
LHR
1 stop20h 25m
United Airlines
Tue 2/311:35 am
LHR
-
HLN
1 stop16h 51m
United Airlines
Deal found 1/23$1,557
This United Airlines deal was found by Cheapflights users on 1/25. 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.
Fri 1/306:15 am
HLN
-
LHR
1 stop20h 25m
United Airlines
Mon 2/211:35 am
LHR
-
HLN
1 stop16h 51m
United Airlines
Deal found 1/25$1,818
This United Airlines deal was found by Cheapflights users on 1/24. 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.
Thu 4/232:25 pm
HLN
-
LHR
1 stop12h 15m
United Airlines
Tue 4/285:40 pm
LHR
-
HLN
2 stops34h 53m
United Airlines
Deal found 1/24$7,107

Find flight deals from Helena to London

Discover tips and strategies to find the most affordable flight options for your journey from Helena (HLN) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$7,107
(United Airlines)
Provider with most accurate pricing for Helena-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Helena-London (LON) flights.
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From Helena to London (LON)
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Helena 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 January 26, 2026.
Use the filters below to find and compare flights from Helena to London that are best for you.

Fly from

Helena

Fly to

London

Route

Depart

Return

Price

HelenaLondon

HLN - LHR

HLNLHR

Helena

Thu 4/23

2:25 pm-9:40 am

1 stop12h 15m

London Heathrow

Tue 4/28

5:40 pm-9:33 pm

2 stops34h 53m

$7,107

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/24

  • Most accurate provider: When it comes to deals on Helena-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Helena-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Helena-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Helena-London flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Helena-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Helena to London

Have a flexible travel schedule? Discover the best time to fly to London from Helena 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 Helena to London

What is the cheapest month to book a flight from Helena to London?

Currently, January is the cheapest month in which you can book a flight from Helena to London (average of $604). Flying from Helena to London in June is currently the most expensive (average of $1,160). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated January 26, 2026.
Read through reviews of airlines operating flights from Helena to London, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,199 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,199 reviews
United Airlines
7.4
Good
9,199 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Helena to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Helena to London?

    Helena (HLN), located 2.7 mi from the city center, is the airport you fly out of when you book flights from Helena to London. 0 airlines have flights from Helena to London on a regular basis. Booking flights from Helena to London should not be difficult; the airport handles an average of 0 outbound flights to London per day.

  • How long is the flight from Helena to London?

    A quick flight from Helena to London can take about 12h 15m. United Airlines provides one of the quickest options available for as low as $7,107. The distance between Helena and London is about 4537 mi.

  • Can I find deals for flights from Helena to London that include hotel bookings?

    Yes. In addition to deals on Helena to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Helena to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Helena to London.

  • Can I find deals for business class flights from Helena to London?

    Yes. Cheapflights offers flight deals from Helena 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.

  • What is the cheapest month to book a flight from Helena to London?

    Currently, January is the cheapest month in which you can book a flight from Helena to London (average of $604). Flying from Helena to London in June is currently the most expensive (average of $1,160). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near London?

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