The cheapest times to fly from STL to LCY are

  • January 1st to March 25th
  • May 14th to June 3rd
  • October 8th to December 9th

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 STL to LCY is late May. Prices can be as high as $1764 for Saturday flights during early August, or as low as $730 for Monday flights around late May.


When to Fly to London

Flying from St. Louis, MO (STL) to London (LCY) will usually cost between $861 to $1411 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late May with an average ticket price of $763. Due to high demand the most expensive time to fly is early August, with an average price of $1491. Planning your trip to low-cost times can easily save you $728 on economy flights and even more on first-class flights. Generally, any price below $927 can be considered a good price for a round-trip STL to LCY flight.

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

STL to LCY Flight Prices

Compared to other flights, the STL to LCY flight is priced close to the average and costs about as much as the average flight leaving from St. Louis. The average price per mile (for a direct flight) is $0.14, which is far below average.


Flight Prices by Day of the Week

Monday is usually the cheapest day to fly to LCY, and Tuesday the cheapest day to fly back into STL. 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 $78 (7%) 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 $979. Return trip prices are from the LCY to STL 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 STL to LCY can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 8 hour 33 minutes may not 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 not usually a nonstop flight from STL to LCY while comparing.

Destination alternative #1: Humberside Airport (HUY) in Humberside

  • 144 miles (232 km) away from LCY
  • Usually 15.21% less expensive than LCY
  • 2-layover flights available

See STL to HUY flights

Destination alternative #2: London Heathrow Airport (LHR) in London

  • 22 miles (35 km) away from LCY
  • Usually 8.74% less expensive than LCY
  • 1-layover flights available

See STL to LHR flights

Destination alternative #3: London Gatwick Airport (LGW) in London

  • 27 miles (43 km) away from LCY
  • Usually 6.69% less expensive than LCY
  • 1-layover flights available

See STL to LGW flights


Flight Hacking STL to LCY

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 STL to LCY — but Champion Traveler does!

Hack #1: New York, NY (STL > LGA > LCY)

  • Price for both tickets: $640
  • Average savings: $288 (31.01%)

See STL to LGA flights

Hack #2: Boston, MA (STL > BOS > LCY)

  • Price for both tickets: $673
  • Average savings: $254 (27.4%)

See STL to BOS flights

Hack #3: New York, NY (STL > JFK > LCY)

  • Price for both tickets: $683
  • Average savings: $245 (26.38%)

See STL to JFK flights


Flight Questions Answered

Still have questions about flying from STL to LCY? We’ve got answers.

Which airlines fly this route?

You can find 17 major airlines flying this route most often: Aer Lingus, Air Canada, Air France, Alitalia, American, British Airways, Brussels Airlines, Delta, Finnair, Iberia, KLM, LOT, Lufthansa, SWISS, Tap Air Portugal, United, Virgin Atlantic, and potentially more during busy seasons.

How far away is it from London City Airport to St Louis Lambert International Airport?

The distance between the two airports is roughly 4207 miles or 6770 kilometers.

How long does it take to fly from STL to LCY?

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

How many flights go between St. Louis, MO and London?

It depends on the day of the week and the date, but a typical day might have around 58 available flights from STL to LCY.


Airport Location Info


Departing Airport

Origination code STL
Origination airport name St Louis Lambert International Airport
City St. Louis, MO
Country the United States
Latitude 38.7
Longitude -90.4

Return Airport

Destination code LCY
Destination airport name London City Airport
City London
Country the United Kingdom
Latitude 51.5
Longitude 0.1


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.