$332 Find Cheap Flights from St. Louis to London Heathrow Airport - Compare and Save

Among airlines operating St. Louis to London Heathrow Airport flights:

• British Airways: offers extra legroom
• Iberia: offers free seat selection
• American Airlines: offers free seat selection
• Finnair: offers extra legroom; offers free seat selection
• Aer Lingus: offers free seat selection

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

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

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

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.

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

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

Prices vary by airline.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $632 round-trip via Houston George Bush Intcntl (IAH), compared to $1,025 for nonstop.

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.

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

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

• Chicago O'Hare Intl (ORD) - 49% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 19% of one-stop connections
• Toronto Pearson Intl (YYZ) - 11% of one-stop connections
• Montreal Pierre Elliott Trudeau Intl (YUL) - 6% 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 14% on the St. Louis to London Heathrow Airport route. Thursday is the cheapest departure day at $894 round-trip on average, while Friday is the most expensive at $1,029, a difference of $135. 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 St. Louis to London Heathrow Airport route, 18% of flights were delayed in the past 3 months, with delays averaging 1 hour 54 minutes.

Some of the most popular sights in London Heathrow Airport are Paddington Station, Central London and London Victoria Station. These are among the most viewed places in London Heathrow Airport on KAYAK.

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

• Earliest: departs at 9:35 pm and lands at 5:35 am
• Latest: departs at 9:40 pm and lands at 5:40 am.

The flight takes about 8h 00m.

Last-minute fares on this route - booked within 2 weeks of departure - run 14% above the route average of $949. Book 5 weeks before departure for the lowest fares.

A nonstop flight from St. Louis to London Heathrow Airport takes 8h 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.

One-way fares from St. Louis to London Heathrow Airport are currently lower than usual. Average one-way flight prices are about $350, which is 34% below the typical average for this route.

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

Evening 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 Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 11h 25m, compared with 11h 41m via Chicago O'Hare Intl (ORD) and 12h 04m via Newark (EWR).

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

London Heathrow Airport (LHR) hosts 5 major car rental companies, with daily rates starting from around $7 for economy cars. Top options include:
• GREEN MOTION
• DRIVALIA
• Europcar
• Alamo
• Hertz

Round-trip flights from St. Louis to London Heathrow Airport range from $721 to $1,276, with an average of $949 over the past 12 months. Anything below $721 counts as a good deal.