Cheap flights from London to St Louis

May is the month when fares on this route tend to sit at their lowest, and it falls before the Missouri summer heat sets in. Fares are published for most of the year, from September through to March, plus May, June and August, so you can compare autumn, winter and early summer departures side by side. Midweek departures usually cost less than Friday or Sunday ones, and avoiding the Thanksgiving and Christmas rush helps. If your dates are fixed around a London school holiday, book well ahead; if they are flexible, watch the price calendar and let it pick the week for you.

Nobody flies London to St Louis nonstop, so your ticket is a connecting one. United Airlines, Delta Air Lines and American Airlines carry you across the Atlantic and on to Lambert, while Air France, Lufthansa, Brussels Airlines, Virgin Atlantic, Air Dolomiti, Portug and Lufthansa City Airlines appear on the European legs and feeder flights. There is no budget carrier in the mix, so the difference between fares is mostly about the routing and the length of the connection, not about a stripped-back ticket. Baggage rules differ between the airlines on the itinerary, so check the allowance for each leg rather than assuming one rule covers the whole trip.

Lambert is the only airport serving St Louis, so every itinerary ends there, whichever hub you connect through. It sits a short drive from downtown, and the usual ways in are a taxi, a rideshare or a rental car collected at the airport. If you connect through another US city, you usually clear immigration there rather than at Lambert, so leave room in the schedule. Check that your bags are tagged through to St Louis and keep the receipt, because on a two-ticket itinerary you collect and re-check them yourself.

Currency

USD ($)

Power sockets

Type A, B · 120 V

Language

Samoan, Hawaiian, Chamorro, Carolinian, Spanish

Emergency number

911

Driving side

right

Calling code

+1

Internet domain

.us

Population of St Louis

302 k (2020)

Time zone

UTC-05 (America/Chicago)

Country facts: Wikidata

• Decide which London airport suits you, Heathrow, Gatwick, Stansted, Luton or London City, before you compare fares.
• Check what the fare includes on each leg, since baggage rules differ between the airlines on a connecting itinerary.
• Find out whether your connection is on one ticket or two, and what happens if the first flight is delayed.
• Confirm your passport and your US entry authorisation are in order well before departure.
• Compare May against your own dates, because the cheapest month is not always the one you can travel in.
• Add up the whole journey door to door, since a change of aircraft adds hours to a route with no nonstop option.