Cheap flights from St Louis (STL) to London (LON)

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The best prices from St Louis to London are usually found in September or October, booked 54 days in advance, depart on a Tuesday or Wednesday and return on a Friday

How to find the cheapest flight from
St Louis (STL) to London (LON)

All the information you need to plan the best STL to LON flight in 2021: compare St Louis to London flight prices with the expected peak season, weather and rainfall in London.
STL - LON
Price
$768 - $1,217
LON
Temperature
48.2 - 73.4 °F
LON
Rainfall
1.4 - 2.8 inches

Popular in

December

High demand for flights, 22% potential price rise

Cheapest in

September

Best time to find cheap flights, 19% potential price drop

Round-trip from

$768

From St Louis to London

One-way from

$484

One-way flight from St Louis to London

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from St Louis to London?

Thursday flights are found to be more expensive to fly from St Louis to London. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London.

How far in advance should I book a flight from St Louis to London?

To save up to 44% on this flight, we recommend booking at least 61 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from St Louis to London from $910 1-2 weeks out and tickets from $1,146 for flights departing within the next 72 hours.

What is the cheapest month to fly from St Louis to London?

October can be a great time to fly to London from St Louis with a flight ticket averaging about $714. Cheapflights users have found deals in the month of October for as cheap as $445. The most expensive prices can be found in the month of July.

When is the cheapest time to fly from St Louis to London (STL - LON)?

A simple way to save on the total cost of your ticket is to fly from St Louis to London in the evening. If you’re flexible enough to do this you can expect to save up to 14% on your trip compared to booking a flight at noon.

Cheap flights from St Louis to London in May, June 2021

The best prices found for STL to LON flights for May, June
15 Jun - 29 Jun
$776pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
28 May - 31 May
$780pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
15 Jun - 29 Jun
$808pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis

St Louis to London 2021 flight deals

Cheap flights to London from St Louis found for this year
13 Oct - 19 Oct
$661pp
STL
Lambert-St Louis
Finnair
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Finnair
   
2 STOPS
STL
Lambert-St Louis
13 Oct - 19 Oct
$662pp
STL
Lambert-St Louis
Finnair
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Finnair
   
2 STOPS
STL
Lambert-St Louis
13 Oct - 19 Oct
$663pp
STL
Lambert-St Louis
Finnair
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Finnair
   
2 STOPS
STL
Lambert-St Louis

Last minute flights from St Louis to London

Late deals on round-trip flights to London from St Louis, departing today and this week
12 May - 16 May
$985pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis
12 May - 16 May
$990pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
12 May - 16 May
$1,006pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis

One-way flights to London from St Louis

The cheapest one-way flights from St Louis to London
6:02 am - 7:25 am
WestJet
2 Stops
43h 23m
STL - LGW
WestJet
7:08 am - 1:55 pm
Multiple Airlines
2 Stops
24h 47m
STL - LTN
Multiple Airlines
$735
Kiwi.com
2:00 am - 2:50 am
British Airways
1 Stop
18h 50m
STL - LHR
British Airways
$747
Kiwi.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">St Louis</span> to <span class="emphasized">London</span> flights.

Flight FAQs

From St Louis to London

Are flight prices decreasing from St Louis to London due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both St Louis and London for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Lambert-St Louis to London to control the spread of COVID-19?

Airlines globally have implemented additional safety measures to accommodate you. Delta is one of them. Airline carriers are regularly disinfecting and sanitizing their aircraft. Masks are provided and are mandatory while on board. Pre-flight testing for symptoms and antibodies, alongside socially distanced seating (for a limited time) will work towards keeping travelers safer while flying from Lambert-St Louis to London. Policies will vary by airline.

Which airlines flying from Lambert-St Louis to London have flexible cancellations due to COVID-19?

Some of our airline partners flying from Lambert-St Louis to London have new flexible policies in place due to COVID-19. American Airlines, United Airlines, and British Airways are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like American Airlines with this kind of flexibility.

What airport do you fly from for flights from St. Louis to London?

Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to London. You should not have trouble finding flights to London from Lambert-St Louis; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 15 airlines have flights from the St. Louis airport to London. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

Can I find flights from St Louis to London for under $700 on Cheapflights?

Yes, there are multiple flights from St Louis to London for under $700. The cheapest flight booked recently is on Finnair for just $661, but on average you can expect to pay $696.

Are there nonstop flights from St Louis to London for under $700 on Cheapflights?

There are no nonstop flights from St Louis to London, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Are there last-minute flights available from St Louis to London for under $1,000?

There are currently 20+ open flights from St Louis to London within the next 7 days for less than $1,000.

Is St Louis weather warmer or cooler than London?

Our data indicates that the weather will be 90 °F on average in the month of July. The temperature in London is typically colder than in St Louis. If you're traveling when the temperature is at its warmest, push to plan early, as flight price and availability will have an impact on your travels. For the best results, search for flights well in advance or after peak season.

How long is the flight from St Louis to London?

Departing from St Louis to London will take you 10h 30m. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines flying from St Louis to London round-trip?

According to our current data, Finnair ($661), Air Canada ($682), and Iberia ($688) offers the cheapest pricing from St Louis to London. Users have found that Finnair is 30% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from St Louis to London one-way?

$394 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on British Airways, with prices from $747.

Alternative routes for St Louis to London

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for London

Things to know before you go - useful duration and weather info for your trip from St Louis to London.
Today's exchange rate
$1 = £0.72
Average temperature for May in London
64.4 °F
Avg rainfall for May in London
2.0 ″

Airports servicing St. Louis

Airports servicing London

Gatwick (LGW)
City (LCY)
Stansted (STN)
Luton (LTN)
Southend (SEN)

Top 10 airlines flying from St Louis to London

The chart below displays the airlines Cheapflights users traveling from St Louis to London choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Brussels Airlines
$351 $627 No cancel fee N/A
Iberia
$433 $728 No cancel fee 77%
Finnair
$395 $836 No cancel fee 76%
United Airlines
$263 $869 No cancel fee 69%
Virgin Atlantic
$603 $893 No cancel fee 72%
KLM
$658 $905 No cancel fee 75%
British Airways
$383 $1,067 No cancel fee 70%
Air Canada
$620 $1,104 No cancel fee 67%
Delta
$691 $1,105 No cancel fee N/A
American Airlines
$360 $1,162 No cancel fee 71%
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