$432 Find Cheap Flights from London Heathrow Airport to St. Louis - Compare and Save

When flying from London Heathrow Airport to St. Louis, you should consider leaving on a Tuesday and avoid Fridays if you are looking for the best rates. For your return to London Heathrow Airport, you’ll find the best rates on Thursdays and the most expensive ones on Fridays.

The cheapest month for flights from London Heathrow Airport to St. Louis is February, where tickets cost $743 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $1,336 and $1,321 respectively.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $1,067 on average.

To get a below average price on the flight from London Heathrow Airport to St. Louis, you should book around 3 weeks before departure, which saves you about 38% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

In the past 5 days, the cheapest round-trip tickets from London Heathrow Airport to St. Louis were found on Lufthansa ($818) and Scandinavian Airlines ($824).

There are 2 airlines that fly nonstop from London Heathrow Airport to St. Louis. They are American Airlines and British Airways. The cheapest airline for this route is British Airways, with the best round-trip deal found costing $791. On average, the best prices for this route can be found at British Airways.

Weekly flights between London and St. Louis historically see delays in approximately 11% of cases, with the average delay over the past year being 117 minutes.

Typically, flights leaving in the early afternoon tend to face fewer delays, whereas flights in the early afternoon have historically encountered delays more often.

Statistically, Friday is the day of the week with the fewest delays on this flight route, while Wednesday has typically experienced more delays than other days.

Based on our data, British Airways have experienced the fewest delays on this route in the past 12 months, with only about 11% of their flights encountering any delays.

Chicago (ORD) is the top choice – 55% of KAYAK users who clicked on 1-stop flights from London Heathrow Airport to St. Louis picked an itinerary connecting there.

Flights via New York (JFK) offer the most affordable fares, with an average round-trip price of $1,180.

Consider flying via Chicago (ORD) for the shortest journey. The average one-way travel time for flights connecting there is 13h 03m.

If you prefer a quick connection, New York (JFK) often has the shortest layovers from London Heathrow Airport to St. Louis, with an average of 1h 32m.