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

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The best prices from Lambert-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
39.2 - 62.6 °F
LON
Precipitation
1.6 - 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 Lambert-St Louis to London All airports (LON)

One-way from

$326

One-way flight from Lambert-St Louis to London All airports (LON)

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 generally found to be more expensive for flights 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?

Travelers have found it’s best to book a flight 53 days in advance to save up to 77% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 53 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St. Louis to London 1-2 weeks in advance for as low as $1,203, or $1,720 for flights within the next 24 hours.

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

Flights from St. Louis to London lean towards being more expensive in December. Prices are generally better when you fly from St. Louis to London in September, with the cheapest ticket starting at $390.

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

It’s optimal to fly from St. Louis to London in the evening. By choosing this option you can save up to 14% on the cost of your flight, compared to a flight at noon.

Cheap flights from St. Louis to London in September, October 2021

The best prices found for STL to LON flights for September, October
26 Oct - 2 Nov
$509pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
25 Oct - 1 Nov
$529pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
29 Oct - 5 Nov
$546pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis

Lambert-St Louis to London 2021 flight deals

Cheap flights to London from St. Louis found for this year
26 Oct - 2 Nov
$509pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
25 Oct - 1 Nov
$529pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
4 Nov - 12 Nov
$545pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LGW
London Gatwick
LGW
London Gatwick
Multiple Airlines
     
3 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
4 Oct - 16 Oct
$700pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
4 Oct - 16 Oct
$730pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
4 Oct - 16 Oct
$815pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis

One-way flights to London from St. Louis

The cheapest one-way flights from St. Louis to London
1:00 am - 2:45 am
Iberia
1 Stop
19h 45m
STL - LHR
Iberia
$393
SnapTravelAir
3:00 am - 5:00 am
Multiple Airlines
2 Stops
44h 00m
STL - LHR
Multiple Airlines
$326
Kiwi.com
2:59 pm - 4:45 am
Multiple Airlines
2 Stops
31h 46m
STL - LGW
Multiple Airlines
$331
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

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.

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.

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.

Can I find flights from St. Louis to London for under $600 on Cheapflights?

Yes, there are multiple flights from St. Louis to London for under $600. The cheapest flight booked recently is on Multiple Airlines for just $509, but on average you can expect to pay $578.

Are there last-minute flights available from St. Louis to London for under $700?

There are currently 20+ open flights from St. Louis to London within the next 7 days for less than $700.

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

According to our current data, Virgin Atlantic ($558), Finnair ($613), and American Airlines ($615) offers the cheapest pricing from St. Louis to London. These flights start at 40% lower than the current average price 3 months from now.

What are the cheapest flights from St. Louis to London?

The cheapest flight price from St. Louis to London is $263. On average you can expect to pay $1,814. The most popular route, (Lambert-St Louis - London Heathrow), can usually be booked for $509.

What are the most popular routes from St. Louis to London?

The most popular flight routes from St. Louis to London are Lambert-St Louis - London Heathrow, Lambert-St Louis - London City and Lambert-St Louis - London Gatwick.

What are the most popular airlines that fly from St. Louis to London?

When booking a flight from St. Louis to London, you may want to consider flying on Major Airline, Cape Air or American Airlines as they are the most popular for this route.

COVID Restrictions

View COVID Travel Restrictions for London, England

Do I need a COVID test to fly to London from St. Louis?

Information is based on travel restrictions from Lambert-St Louis to London

Most visitors from Lambert-St Louis need to provide a negative COVID-19 test result and/or quarantine to enter London.

COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to London.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering London.

Documents
Mandatory passenger locator form - Submit the form any time in the 48 hours before arriving in the UK. Show the form when checking in your plane, train or ferry to the UK.

Managed quarantine package for Scotland - All travelers arriving directly to Scotland are required to book their Managed Quarantine Package prior to travel.

COVID-19 testing package - All travelers must book and pay for a COVID-19 Testing Package prior to travel to England and Scotland.


Do I need a test to fly back to St. Louis from London?

Returning to Lambert-St Louis from London

COVID-19 testing requirements
Visitors from London must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Lambert-St Louis.

Quarantine requirements
Visitors from London are not required to quarantine after entering Lambert-St Louis.

Hide COVID Travel Restrictions for London, England

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 = £0.74
Average temperature for September in London
68.0 °F
Avg rainfall for September in London
1.9 ″

Airports servicing St. Louis

Airports servicing London

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

Top 10 airlines flying from Lambert-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
United Airlines
$263 $869 No cancel fee 69%
Brussels Airlines
$351 $627 No cancel fee N/A
American Airlines
$360 $1,162 No cancel fee 71%
British Airways
$383 $1,067 No cancel fee 70%
Finnair
$395 $836 No cancel fee 76%
Iberia
$433 $728 No cancel fee 77%
Virgin Atlantic
$603 $893 No cancel fee 72%
Air Canada
$620 $1,104 No cancel fee 67%
KLM
$658 $905 No cancel fee 75%
Delta
$691 $1,105 No cancel fee N/A
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