The cheapest times to fly from HLN to STN are

  • March 26th to October 21st (except the weeks of April 9th, July 2nd, July 23rd, and August 6th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from HLN to STN is late April. Prices can be as high as $8336 for Saturday flights during late December, or as low as $1033 for Thursday flights around late April.


When to Fly to London

Flying from Helena, MT (HLN) to London (STN) will usually cost between $1209 to $4991 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late April with an average ticket price of $1625. Due to high demand the most expensive time to fly is late December, with an average price of $4237. Planning your trip to low-cost times can easily save you $2612 on economy flights and even more on first-class flights. Generally, any price below $2434 can be considered a good price for a round-trip HLN to STN flight.

See below for a graph of average weekly prices for the HLN to STN route. All prices are for round-trip tickets in USD.

HLN to STN Flight Prices

Compared to other flights, the HLN to STN flight is more expensive than the average and costs more than the average flight leaving from Helena. The average price per mile (for a direct flight) is $0.33, which is in the normal range for a flight.


Flight Prices by Day of the Week

Thursday is usually the cheapest day to fly to STN, and Tuesday the cheapest day to fly back into HLN. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $1861 (47%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Thursday and returning a week later will cost an average of $2052. Return trip prices are from the STN to HLN flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from HLN to STN can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 9 hour 9 minutes may be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is a nonstop flight from HLN to STN while comparing.

Destination alternative #1: London Heathrow Airport (LHR) in London

  • 41 miles (66 km) away from STN
  • Usually 57.28% less expensive than STN
  • 1-layover flights available

See HLN to LHR flights

Destination alternative #2: Manchester Airport (MAN) in Manchester

  • 146 miles (235 km) away from STN
  • Usually 50.15% less expensive than STN
  • 2-layover flights available

See HLN to MAN flights

Destination alternative #3: London City Airport (LCY) in London

  • 27 miles (43 km) away from STN
  • Usually 44.73% less expensive than STN
  • 1-layover flights available

See HLN to LCY flights


Flight Hacking HLN to STN

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from HLN to STN — but Champion Traveler does!

Hack #1: Frankfurt (HLN > FRA > STN)

  • Price for both tickets: $1015
  • Average savings: $1419 (58.31%)

See HLN to FRA flights

Hack #2: San Francisco, CA (HLN > SFO > STN)

  • Price for both tickets: $1027
  • Average savings: $1407 (57.8%)

See HLN to SFO flights

Hack #3: Madrid (HLN > MAD > STN)

  • Price for both tickets: $1122
  • Average savings: $1312 (53.91%)

See HLN to MAD flights


Flight Questions Answered

Still have questions about flying from HLN to STN? We’ve got answers.

Which airlines fly this route?

You can find 11 major airlines flying this route most often: Air Canada, Air France, Alaska, Delta, Eurowings, KLM, Lufthansa, SAS, SWISS, Turkish Airlines, United, and potentially more during busy seasons.

How far away is it from London Stansted Airport to Helena Regional Airport?

The distance between the two airports is roughly 4539 miles or 7305 kilometers.

How long does it take to fly from HLN to STN?

The real-world flight time for a nonstop HLN to STN flight is about 9 hour 9 minutes.

How many flights go between Helena, MT and London?

It depends on the day of the week and the date, but a typical day might have around 11 available flights from HLN to STN.


Airport Location Info


Departing Airport

Origination code HLN
Origination airport name Helena Regional Airport
City Helena, MT
Country the United States
Latitude 46.6
Longitude -112

Return Airport

Destination code STN
Destination airport name London Stansted Airport
City London
Country the United Kingdom
Latitude 51.9
Longitude 0.2


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.