Cheap flights from St. Louis to London

Flight deals from St. Louis to London

Below you can see the best deals on flights St. Louis — London for upcoming dates. Direct and connecting flights from various airlines — compare prices and choose the right ticket.

The lowest price for the next 2 months is on 27 September, from $371.

Top 10 cheap flights from St. Louis to London

When is the best time to book a flight from St. Louis to London?

The price of a flight from St. Louis to London changes depending on how far ahead you book. For the best chance of a lower fare, book around 8 days before departure, when the average ticket costs about $569. Fares also tend to climb as the departure date gets closer.

About the St. Louis — London flight

Looking for cheap flights from St. Louis to London? Compare fares from different airlines, check the flight schedule and travel time — and book your St. Louis — London ticket online at the best price.

The route has direct flights — around 12 flights per week, flights are operated by British Airways, American Airlines, Finnair, Aer Lingus and 1 more airline, a nonstop flight takes about 10 h 19 min, the distance between the cities is around 6,777 km.

Planning your trip? You may find our London travel guide, how to get from the airport into town and London weather forecast useful. To catch a low fare, use the low-price calendar and the monthly price chart on this page.

from $314Min. price

NovemberCheapest

AugustPeak season

YesDirect flights

6,777 kmDistance

10 h 19 minTravel time

5Airlines

12 / wkFlights

Flight schedule from St. Louis to London

The table shows direct flights from St. Louis to London on the selected date. The flight takes approximately 10 h 19 min. Regular flights are operated by British Airways, American Airlines, Finnair and Aer Lingus. Departures from Lambert-St. Louis International Airport airports, arrivals at Heathrow Airport, London Gatwick Airport and Stansted Airport.

For each flight, the following details are shown: departure time (local), arrival city and airport, flight number and airline, terminal or gate, and status. Click on a flight to open its details and go to ticket search. To view flights on a different day, change the date above the table.

Today

Any time

Last update: 25 Aug 2026

Airline

Flight

Departure

Arrival

Duration

Days

Status

Below is a calendar of the lowest flight ticket prices for St. Louis — London by day. Pick a convenient date and instantly see the fare. The cheapest flights on this route start from $314 in November, and the most expensive are around $455 in August. If your travel dates are flexible, the calendar will help you find the best price for your preferred period. To view round-trip fares, switch to the "Round trip" tab above the calendar, select your departure date — and the right-hand calendar will highlight the lowest prices for return flights on each day.

Prices by month

Average one-way fares from St. Louis to London by month. Tickets are usually cheapest in January (around $432) and priciest in July (about $740) — use the table and chart below to pick the best time to fly.

Month	Average price	Level	Month	Average price	Level	Month	Average price	Level
Jan	$432	low	May	$668	high	Sep	$534	medium
Feb	$442	low	Jun	$719	high	Oct	$452	low
Mar	$493	medium	Jul	$740	high	Nov	$462	low
Apr	$514	medium	Aug	$699	high	Dec	$668	high

Some values are estimated based on seasonality.

When to fly

Weather in London: it is warmest in July (up to 22 °C on average) and coolest in January (around 7 °C). The driest month is June.

Tickets are usually cheapest in November and most expensive in August. Compare prices and weather by month in the charts below to pick the best time to fly.

Temperature · London

Dry and wet days · London

Wind speed and direction · London

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How to get the best deal on a St. Louis — London ticket

Book ahead: fares for St. Louis — London are usually lower 3–8 weeks before departure than at the last minute.
Play with your dates — Tuesday, Wednesday and Saturday departures are often cheaper than Friday and Sunday.
Flights St. Louis — London operate on Sundays, Tuesdays, Wednesdays and Fridays — keep that in mind when picking your travel dates.
The cheapest month to fly to London is usually November — plan your trip around it if your dates are flexible.
Compare direct and connecting flights: nonstop is faster, while a connection is sometimes noticeably cheaper.
Watch the low-price calendar and the monthly price trend on this page — they make it easier to catch a good date.
Travelling light? Pick a cabin-baggage-only fare — tickets without checked luggage are noticeably cheaper.
Get to the airport in good time — about 2–3 hours before an international departure and roughly an hour before a domestic one.

Flights on the St. Louis — London route are operated by 5 airlines; British Airways runs the most flights (around 67% of all flights). Compare carriers, flight shares and schedules below.

British AirwaysBA
3x/week
WebsiteFleet: 29243M pax/year
- Direct flight STL → LHR3x/week
  Duration
  8h
  Days
  MTWTFSS
66.7%Open →
American AirlinesAA
1x/week
WebsiteFleet: 965211M pax/year
- Direct flight STL → LHR1x/week
8.3%Open →
FinnairAY
1x/week
WebsiteFleet: 7911M pax/year
- Direct flight STL → LHR1x/week
8.3%Open →
Aer LingusEI
1x/week
WebsiteFleet: 5710.7M pax/year
- Direct flight STL → LHR1x/week
  Duration
  8h 5m
  Days
  MTWTFSS
8.3%Open →
IberiaIB
1x/week
WebsiteFleet: 9224M pax/year
- Direct flight STL → LHR1x/week
8.3%Open →

Cities and airports on the St. Louis — London route

Flights St. Louis — London depart from Lambert-St. Louis International Airport and arrive at Heathrow Airport, London Gatwick Airport, Stansted Airport and London Luton Airport. Below are pages for the cities, countries, and airports on the route: airlines, schedules, and travel guides.

Departure

St. Louis

STL

United States

About the city How to get there Weather All about the country United States

Arrival

London

LON

United Kingdom

About the city How to get there Weather All about the country United Kingdom

Departure airports

Lambert-St. Louis International AirportSTL
About the airport

Arrival airports

Heathrow AirportLHR
About the airport
London Gatwick AirportLGW
About the airport
Stansted AirportSTN
About the airport
London Luton AirportLTN
About the airport
London City AirportLCY
About the airport
London Southend AirportSEN
About the airport

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Frequently asked questions about the St. Louis — London flight

How long is the flight from St. Louis to London?

A nonstop St. Louis — London flight takes about 10 h 19 min — the distance between the cities is around 6,777 km.

How far is it from St. Louis to London?

The distance from St. Louis to London is about 6,777 km, which a nonstop flight covers in around 10 h 19 min.

Are there direct flights from St. Louis to London?

Yes, there are nonstop flights St. Louis — London — around 12 flights per week.

Which airlines fly from St. Louis to London?

Airlines operating St. Louis — London include British Airways, American Airlines, Finnair, Aer Lingus, Iberia. See the full list with schedules in the "Airlines" section on this page.

Which airports do St. Louis — London flights use?

Flights from St. Louis depart from Lambert-St. Louis International Airport, and arrive at Heathrow Airport, London Gatwick Airport, Stansted Airport. If a city has more than one airport, check which one your ticket uses before you travel.

How much is a ticket from St. Louis to London?

The price of a St. Louis — London ticket depends on your travel date, season and demand: it is usually cheapest to fly in November, and most expensive in August. Tickets typically cost between $314 and $455. Check the current lowest fare and low-price calendar on this page.

When is the best time to book flights St. Louis — London?

Flights St. Louis — London are usually cheaper when booked in advance — a few weeks before departure and away from peak dates; the most budget-friendly month to fly is November. Compare prices by month in the price trend chart on this page.

How can I find the cheapest flights from St. Louis to London?

To catch a low fare St. Louis — London, book a few weeks in advance, keep your dates flexible, and compare airlines and connecting options. The low-price calendar and monthly price chart on this page show the cheapest days and months at a glance: the most budget-friendly month to fly is usually November.

How early should I arrive at the airport?

For international flights, plan to be at the airport about 2–3 hours before departure, and around an hour before a domestic flight. Allow extra time during busy travel seasons and at large hubs, where check-in and security lines can be longer.

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