£350 Find Cheap Flights from London to St. Louis – Compare and Save

Three cabin classes are available on flights from London to St. Louis:

• Economy class
• Premium Economy Class
• Business Class

A direct flight from London to St. Louis takes 00m, covering 4,198 miles.

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Return flights from London to St. Louis range from £634 to £897, with an average of £730 over the past 12 months. Anything below £634 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 37% above the £730 route average. Book 17 weeks before departure for the lowest fares.

On this route, stopover flights are cheaper than direct options on average. Stopover fares average £567 return via Minneapolis St Paul (MSP), compared with £807 for direct.

British Airways is the only airline operating London to St. Louis flights. 85% of its flights are on time.

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge £56–£74 for the first checked bag in Economy. Premium fares and elite status bookings typically include a free checked bag.

One-way fares from London to St. Louis are currently lower than usual. Average one-way flight prices are about £428, which is 32% below the typical average for this route.

Lambert-St Louis Airport (STL) hosts 5 major car hire companies, with daily rates averaging £57 for economy cars. Top options include:

• Hertz
• Budget
• Alamo
• Enterprise Rent-A-Car
• Payless

Flights from London to St. Louis may depart from several airports in London area, including London City (LCY), London Gatwick (LGW), London Heathrow (LHR), London Luton (LTN), London Southend (SEN) and London Stansted (STN). Flights usually arrive at Lambert-St Louis (STL).

Afternoon flights have the fewest delays on this route.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the London to St. Louis route, 15% of flights were delayed in the past three months, with delays averaging 1h 50m.

One-stop flights from London to St. Louis most commonly connect through:

• Chicago O'Hare Intl (ORD) – 44% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) – 37% of one-stop connections
• Toronto Pearson Intl (YYZ) – 5% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) – 4% of one-stop connections

Yes. Flexible dates can save you up to 21% on flights from London to St. Louis. Saturday is the cheapest departure day at £706 return on average, while Sunday is the most expensive at £883, a difference of £177.

Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

Flying via Chicago O'Hare Intl (ORD) gives the shortest average 1-stop total travel time of 11h 42m, compared to 11h 44m via Detroit Metropolitan Wayne County (DTW) and 12h via Toronto Pearson Intl (YYZ).

St. Louis is 6 hours behind London (Central Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in St. Louis are St. Louis Union Station, Gateway Arch, and America's Center Convention Complex. These are among the most viewed places in St. Louis on KAYAK.

Among airlines operating London to St. Louis flights:

• American Airlines: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Here are some options for this route, based on selected ticket types and cabin classes:

• British Airways: a cabin bag and a checked bag in Economy class
• Iberia: a cabin bag and a checked bag in Economy class
• American Airlines: a cabin bag and a checked bag in Economy class

Baggage allowance can vary by ticket type, cabin class, route, and airline, so always check the fare details before booking.

You can speed up your journey through London Airports using the fast track system. At Heathrow Airport (LHR), fast-track passes cost about £12.50, while at Gatwick Airport (LGW), they cost about £5. Both fast-track services help you skip through security, allowing you more time to enjoy the departure lounge.

Getting to the city centre from St Louis Airport (STL) is easy, with a few transport options available. The MLR Red Line to Lambert East TRML Metrolink Station is a low-cost choice. The Red Line takes about 29min and has 12 stops. However, if you want to get to the city quicker, you can get a taxi from the front of the terminal, which takes around 19min.

If your flight is early in the morning, you can ensure you’re not in a rush by getting a hotel the night before. For example, at Heathrow Airport, you can go to the Ibis London Heathrow Airport, whereas at Gatwick Airport, you can go to Hilton London Gatwick Airport. The hotels are only a short walk to the terminal on the morning of your flight.

When you land at St. Louis Airport, you can use the Banking and Foreign Currency Exchange to convert your Pound Sterling to US Dollar. The currency exchange is in Terminal 1 on the lower level close to the Gate C Security checkpoint.