$503 Find Cheap Flights from London Heathrow Airport to St. Louis - Compare and Save

Four cabin classes are available on flights from London Heathrow Airport to St. Louis:

• Economy Class
• Premium Economy Class
• Business Class
• First Class

Prices vary by airline.

A nonstop flight from London Heathrow Airport to St. Louis takes 00m, covering 4,186 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 London Heathrow Airport to St. Louis range from $841 to $1,198, with an average of $964 over the past 12 months. Anything below $841 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 37% above the $964 route average. Book 17 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $763 round-trip via Minneapolis St Paul (MSP), compared to $1,077 for nonstop.

British Airways is the only airline operating London Heathrow Airport 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 $75–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 787-8 Dreamliner family is used most often on this route, operated mainly by British Airways and American Airlines. Other aircraft seen on the route include Embraer 175 variants.

One-way fares from London Heathrow Airport to St. Louis are currently higher than usual. Average one-way flight prices are about $1,558, which is 90% above the typical average for this route.

Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates averaging $78 for economy cars. Top options include:

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

Flights from London Heathrow Airport to St. Louis usually depart from London Heathrow (LHR) and 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 Heathrow Airport to St. Louis route, 15% of flights were delayed in the past 3 months, with delays averaging 1h 50m.

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

• Atlanta Hartsfield-Jackson (ATL) - 42% of one-stop connections
• Chicago O'Hare Intl (ORD) - 39% of one-stop connections
• Charlotte Douglas (CLT) - 5% of one-stop connections
• Toronto Pearson Intl (YYZ) - 5% of one-stop connections

Yes. Flexible dates can save you up to 18% on flights from London Heathrow Airport to St. Louis. Tuesday is the cheapest departure day at $907 round-trip on average, while Sunday is the most expensive at $1,098, a difference of $191.

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

St. Louis is 5 hours behind London Heathrow Airport (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 Busch Stadium, Enterprise Center and America's Center Convention Complex. These are among the most viewed places in St. Louis on KAYAK.

Among airlines operating London Heathrow Airport 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

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