$343 Find Cheap Flights from St. Louis to London - Compare and Save

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

• Economy Class
• Premium Economy Class
• Business Class

A nonstop flight from St. Louis to London takes about 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.

Round-trip flights from St. Louis to London range from $839 to $1,372, with an average of $1,056 over the past 12 months. Anything below $839 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 20% above the $1,056 route average. Book 24 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $917 round-trip via Dallas/Fort Worth (DFW), compared to $1,154 for nonstop.

British Airways is the only airline operating St. Louis to London flights. 82% of its flights are on time.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $70–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

American Airlines is typically the only airline on the St. Louis to London route offering in-flight Wi-Fi. Pricing depends on fare class.

One-way fares from St. Louis to London are currently lower than usual. Average one-way flight prices are about $349, which is 38% below the typical average for this route.

Since London is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
Near London Heathrow Airport (LHR) — daily rates averaging $38:

• GREEN MOTION
• DRIVALIA
• Europcar
• Alamo
• Rentacar

Near London Gatwick Airport (LGW) — daily rates averaging $39:

• GREEN MOTION
• DRIVALIA
• U-Save
• Europcar
• Alamo

Near London Stansted Airport (STN) — daily rates averaging $35:

• GREEN MOTION
• DRIVALIA
• Europcar
• Alamo
• U-Save

Near London Luton Airport (LTN) — daily rates averaging $38:

• GREEN MOTION
• DRIVALIA
• Alamo
• Europcar
• U-Save

Flights from St. Louis to London usually depart from Lambert-St Louis (STL) and may arrive at 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).

Evening flights have the fewest delays on this route, while night departures tend to have the most.

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 St. Louis to London route, 18% of flights were delayed in the past 3 months, with delays averaging 1h 54m.

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

• Chicago O'Hare Intl (ORD) - 46% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 17% of one-stop connections
• Toronto Pearson Intl (YYZ) - 13% of one-stop connections
• Charlotte Douglas (CLT) - 4% of one-stop connections

Yes. Flexible dates can save you up to 19% on flights from St. Louis to London. Tuesday is the cheapest departure day at $977 round-trip on average, while Friday is the most expensive at $1,196, a difference of $219.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Flying via Minneapolis St Paul (MSP) gives the shortest average 1-stop total travel time at 11h 12m, compared with 11h 42m via Chicago O'Hare Intl (ORD) and 12h 02m via Detroit Metropolitan Wayne County (DTW).

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

Some of the most popular sights in London are Hyde Park and Buckingham Palace. These are among the most viewed places in London on KAYAK.

American Airlines and Iberia offer free seat selection on this route. Availability depends on fare class.

Only British Airways currently offers extra legroom on this route. Availability can vary by aircraft type and fare class.

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
• American Airlines: a cabin bag and a checked bag in Economy Class
• Iberia: a cabin bag and a checked bag in Economy Class

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

There are a lot of hotels at and surrounding Heathrow Airport, and they provide rooms at prices to suit a wide range of budgets. The Yotel is a hotel with a pod-like design that is located inside Terminal 4 and is styled like the first-class cabin of an airplane. You may book rooms on an hourly basis, which is an excellent choice if you have a stopover and need to get some sleep before continuing on your journey.

The most reliable way to get into s the town center is to take either the Tube's Piccadilly Line or the Heathrow Express train. This option is best if you only have to wait for less than 6h, but it is a lot more expensive than the Tube.

A full-service US Bank offers comprehensive banking and foreign exchange services. It is situated in Terminal 1, Lower Level, across from Great American Bagel.

St. Louis Lambert International Airport (STL) has a private, designated place for nursing mothers. The room is situated after security checkpoints on all three concourses, close to Gates A10, C9, and E33.