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$623+ 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
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap 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 September 17, 2025.

Round-trip from

$623
(KLM)
From Helena to London (LON)
Search Deals

Find 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 September 17, 2025.

This KLM deal was found by Cheapflights users on 9/15. 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.
Tue 10/281:00 pmHLN - LHR
1 stop15h 00mMultiple Airlines
Wed 11/56:20 amLHR - HLN
2 stops22h 56mMultiple Airlines
Deal found 9/15$623
This KLM deal was found by Cheapflights users on 9/16. 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.
Tue 9/231:00 pmHLN - LHR
1 stop13h 50mKLM
Wed 10/111:00 amLHR - HLN
1 stop18h 14mKLM
Deal found 9/16$631
This KLM deal was found by Cheapflights users on 9/16. 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.
Tue 9/231:00 pmHLN - LHR
2 stops18h 15mMultiple Airlines
Wed 10/110:55 amLHR - HLN
2 stops18h 19mMultiple Airlines
Deal found 9/16$636
This KLM deal was found by Cheapflights users on 9/16. 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.
Sun 10/261:00 pmHLN - LHR
2 stops15h 30mMultiple Airlines
Mon 11/106:20 amLHR - HLN
2 stops23h 17mMultiple Airlines
Deal found 9/16$678
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Sun 10/266:40 amHLN - LHR
1 stop21h 00mUnited Airlines
Mon 11/104:40 pmLHR - HLN
2 stops35h 42mUnited Airlines
Deal found 9/16$707
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 12/296:10 amHLN - LHR
1 stop20h 30mUnited Airlines
Wed 1/711:35 amLHR - HLN
1 stop16h 51mUnited Airlines
Deal found 9/15$762
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/106:30 amHLN - LHR
1 stop20h 10mUnited Airlines
Sat 10/184:40 pmLHR - HLN
2 stops31h 00mUnited Airlines
Deal found 9/15$778
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 10/286:40 amHLN - LCY
3 stops20h 05mMultiple Airlines
Wed 11/57:10 pmLCY - HLN
3 stops33h 12mMultiple Airlines
Deal found 9/15$833
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 12/296:10 amHLN - LCY
3 stops23h 40mMultiple Airlines
Wed 1/76:10 pmLCY - HLN
3 stops34h 16mMultiple Airlines
Deal found 9/15$959
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Sun 10/266:40 amHLN - LCY
3 stops19h 55mMultiple Airlines
Mon 11/107:10 pmLCY - HLN
3 stops33h 12mMultiple Airlines
Deal found 9/16$970
This United Airlines deal was found by Cheapflights users on 9/17. 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.
Sat 11/16:40 amHLN - LCY
3 stops24h 00mMultiple Airlines
Sat 11/88:40 amLCY - HLN
3 stops43h 42mMultiple Airlines
Deal found 9/17$974
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Tue 9/236:30 amHLN - LCY
3 stops23h 00mMultiple Airlines
Wed 10/17:20 pmLCY - HLN
3 stops32h 40mMultiple Airlines
Deal found 9/16$1,030

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 September 17, 2025.
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

Tue 10/28

1:00 pm-10:00 am

1 stop15h 00m

London Heathrow

Wed 11/5

6:20 am-10:16 pm

2 stops22h 56m

$623

HelenaLondon

HLN - LHR

HLNLHR

Helena

Sun 10/26

1:00 pm-10:30 am

2 stops15h 30m

London Heathrow

Mon 11/10

6:20 am-10:37 pm

2 stops23h 17m

$678

HelenaLondon

HLN - LHR

HLNLHR

Helena

Sun 10/26

6:40 am-9:40 am

1 stop21h 00m

London Heathrow

Mon 11/10

4:40 pm-9:22 pm

2 stops35h 42m

$707

HelenaLondon

HLN - LHR

HLNLHR

Helena

Mon 12/29

6:10 am-9:40 am

1 stop20h 30m

London Heathrow

Wed 1/7

11:35 am-9:26 pm

1 stop16h 51m

$762

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 10/10

6:30 am-9:40 am

1 stop20h 10m

London Heathrow

Sat 10/18

4:40 pm-4:40 pm

2 stops31h 00m

$778

HelenaLondon

HLN - LCY

HLNLCY

Helena

Tue 10/28

6:40 am-8:45 am

3 stops20h 05m

London City

Wed 11/5

7:10 pm-9:22 pm

3 stops33h 12m

$833

HelenaLondon

HLN - LCY

HLNLCY

Helena

Mon 12/29

6:10 am-12:50 pm

3 stops23h 40m

London City

Wed 1/7

6:10 pm-9:26 pm

3 stops34h 16m

$959

HelenaLondon

HLN - LCY

HLNLCY

Helena

Sun 10/26

6:40 am-8:35 am

3 stops19h 55m

London City

Mon 11/10

7:10 pm-9:22 pm

3 stops33h 12m

$970

HelenaLondon

HLN - LCY

HLNLCY

Helena

Sat 11/1

6:40 am-12:40 pm

3 stops24h 00m

London City

Sat 11/8

8:40 am-9:22 pm

3 stops43h 42m

$974

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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, November is the cheapest month in which you can book a flight from Helena to London (average of $661). Flying from Helena to London in June is currently the most expensive (average of $1,097). 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 September 17, 2025.
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
8,926 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
United Airlines
7.4
Good
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

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 21h. United Airlines provides one of the quickest options available for as low as $707. 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, November is the cheapest month in which you can book a flight from Helena to London (average of $661). Flying from Helena to London in June is currently the most expensive (average of $1,097). 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?

Book flights to London if you plan to visit one of these locations
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Hayes
Southend-on-Sea
Harrow
Canterbury
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Eastleigh
Dartford
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Winchester
Orpington
Gatwick
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