The cheapest times to fly from ISN to STN are

  • January 1st to April 22nd (except the week of April 2nd)
  • June 18th to July 15th
  • August 6th to September 30th (except the weeks of August 13th and September 10th)

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 ISN to STN is mid March. Prices can be as high as $17100 for Friday flights during late December, or as low as $1344 for Monday flights around mid March.


When to Fly to London

Flying from Williston, ND (ISN) to London (STN) will usually cost between $1347 to $11150 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid March with an average ticket price of $3097. Due to high demand the most expensive time to fly is late December, with an average price of $9116. Planning your trip to low-cost times can easily save you $6019 on economy flights and even more on first-class flights. Generally, any price below $6271 can be considered a good price for a round-trip ISN to STN flight.

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

ISN to STN Flight Prices

Compared to other flights, the ISN to STN flight is more expensive than the average and costs more than the average flight leaving from Williston. The average price per mile (for a direct flight) is $0.93, which is above average.


Flight Prices by Day of the Week

Monday is usually the cheapest day to depart and return on this flight. Fridays 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 $2286 (34%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Monday and returning a week later will cost an average of $3960. Return trip prices are from the STN to ISN 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 ISN to STN can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 8 hour 33 minutes may be realistic.


Flight Hacking ISN 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 ISN to STN — but Champion Traveler does!

Hack #1: Newark, NJ (ISN > EWR > STN)

  • Price for both tickets: $1118
  • Average savings: $5154 (82.18%)

See ISN to EWR flights

Hack #2: Boston, MA (ISN > BOS > STN)

  • Price for both tickets: $1228
  • Average savings: $5043 (80.42%)

See ISN to BOS flights

Hack #3: Los Angeles, CA (ISN > LAX > STN)

  • Price for both tickets: $1259
  • Average savings: $5012 (79.92%)

See ISN to LAX flights


Flight Questions Answered

Still have questions about flying from ISN 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, atlasglobal, Delta, Eurowings, Icelandair, KLM, SAS, SWISS, United, Wideroe, and potentially more during busy seasons.

How far away is it from London Stansted Airport to Sloulin Field International Airport?

The distance between the two airports is roughly 4201 miles or 6761 kilometers.

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

The real-world flight time for a nonstop ISN to STN flight is about 8 hour 33 minutes.

How many flights go between Williston, ND and London?

It depends on the day of the week and the date, but a typical day might have around 26 available flights from ISN to STN.


Airport Location Info


Departing Airport

Origination code ISN
Origination airport name Sloulin Field International Airport
City Williston, ND
Country the United States
Latitude 48.2
Longitude -103.6

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.