Cheap flights from the United Kingdom to St. Louis from £271

The month of August is, on average, the cheapest month to fly to St. Louis from United Kingdom, with most prices found around £69. If you’re not able to fly to St. Louis in August, then September is your next best option. Flight prices from United Kingdom to St. Louis during September average around £128.

Our data shows that Saturday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as £603. Flights from United Kingdom to St. Louis on a Sunday will generally be more expensive and average around £939. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Fly from London Heathrow to Lambert-St Louis for the best United Kingdom - Lambert-St Louis flight prices

You are more likely to see cheaper flights to St. Louis from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around £771 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from United Kingdom for as low as £645 on momondo.

There are 2 cabin classes available to choose from on United Kingdom to St. Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 44% on your flight if you consider stops on a United Kingdom to St. Louis flight.

Lufthansa, British Airways, and Delta are the most popular carriers operating from United Kingdom to Lambert-St Louis

British Airways, Virgin Atlantic and United Airlines are the top three most popular airlines that fly to St. Louis from United Kingdom according to our data. British Airways is the first choice among our users, with 38% of people opting to fly with this airline when travelling to St. Louis. Keep in mind that there are 10 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

Historically, on average around 5% of flights between United Kingdom and St. Louis have experienced a delay on any given week. The average delay length over the past 12 months has been 79 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Wednesday is statistically the day of the week that experiences the fewest delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

According to our data, British Airways have had the fewest delays on this route over the last 12 months, with about 5% of their flights experiencing any sort of delay.

As of June 2026, 2 flights take off from United Kingdom and land in St. Louis each day. The most common flight departure time for this route is 16:00, with 100% of daily flights taking off in the afternoon.

20 flights are operational weekly from United Kingdom to St. Louis as of June 2026. The most popular departure day for this route is Tue, with 25% of flights per week taking off on this day.