$489 Find Cheap Flights from London Heathrow Airport to St. Louis - Compare and Save

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.

Only British Airways operates flights between London Heathrow Airport and St. Louis.

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

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 travelers should check the fare details before booking.

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

• Economy Class
• Premium Economy Class
• Business Class

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 $1,050 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $74–$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 Finnair. Other aircraft seen on the route include Embraer 175 variants.

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

• Chicago O'Hare Intl (ORD) - 41% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 32% of one-stop connections
• Toronto Pearson Intl (YYZ) - 8% of one-stop connections
• Charlotte Douglas (CLT) - 5% of one-stop connections

Chicago O'Hare Intl (ORD) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 11% on the London Heathrow Airport to St. Louis route. Tuesday is the cheapest departure day at $912 round-trip on average, while Saturday is the most expensive at $1,024, a difference of $112. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

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, 16% of flights were delayed in the past 3 months, with delays averaging 1 hour 50 minutes.

Some of the most popular sights in St. Louis are Downtown St. Louis, Busch Stadium and Enterprise Center. These are among the most viewed places in St. Louis on KAYAK.

These are the earliest and latest flight times available from London Heathrow Airport to St. Louis:

• Earliest: departs at 4:25 pm and lands at 1:30 am
• Latest: departs at 4:25 pm and lands at 1:30 am.

The flight takes about 9h 05m.

Last-minute fares on this route - booked within 2 weeks of departure - run 20% above the route average of $957. Book 24 weeks before departure for the lowest fares.

A nonstop flight from London Heathrow Airport to St. Louis takes 9h 05m, 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.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $842 to $7,466. That means the highest observed fare was about 9x higher than the lowest one.

One-way fares from London Heathrow Airport to St. Louis are currently higher than usual. Average one-way flight prices are about $1,582, which is 83% above the typical average for this route.

British Airways is the only airline operating London Heathrow Airport to St. Louis flights. 84% of its flights are on time.

Afternoon flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

Flying via Chicago O'Hare Intl (ORD) gives the shortest average 1-stop total travel time at 11h 40m, compared with 11h 45m via Detroit Metropolitan Wayne County (DTW) and 11h 54m via Montreal Pierre Elliott Trudeau Intl (YUL).

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

Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates starting from around $31 for economy cars. Top options include:
• Hertz
• Budget
• Alamo
• Enterprise Rent-A-Car
• Payless

Round-trip flights from London Heathrow Airport to St. Louis range from $848 to $1,179, with an average of $957 over the past 12 months. Anything below $848 counts as a good deal.