Cheap flights from Lambert-St Louis Intl (STL) to London (LON)

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The best prices from Lambert-St Louis Intl 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
Lambert-St Louis Intl (STL) to London (LON)

All the information you need to plan the best STL to LON flight in 2021: compare Lambert-St Louis Intl 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 Lambert-St Louis Intl to London

One-way from

$407

One-way flight from Lambert-St Louis Intl 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 Lambert-St Louis Intl to London?

Travelers have found that booking a Monday departure is the best way to save up to 28% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

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

Travelers have found it’s best to book a flight 61 days in advance to save up to 44% 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 61 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 Lambert-St Louis Intl to London 1-2 weeks in advance for as low as $910, or $1,146 for flights within the next 24 hours.

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

Flights from Lambert-St Louis Intl to London lean towards being more expensive in July. Prices are generally better when you fly from Lambert-St Louis Intl to London in October, with the cheapest ticket starting at $445.

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

It’s typically best to fly out from Lambert-St Louis Intl to London in the evening. Doing so could potentially save you 14% on the flight price compared to flying at noon, which is usually more expensive.

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

The best prices found for STL to LON flights for May, June
9 Jun - 16 Jun
$725pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
9 Jun - 23 Jun
$743pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
9 Jun - 13 Jun
$750pp
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 Intl to London 2021 flight deals

Cheap flights to London from Lambert-St Louis Intl found for this year
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
$686pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
British Airways
   
2 STOPS
STL
Lambert-St Louis
11 Oct - 25 Oct
$699pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis

Last minute flights from Lambert-St Louis Intl to London

Late deals on round-trip flights to London from Lambert-St Louis Intl, departing today and this week
21 May - 22 Jun
$1,067pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis
21 May - 22 Jun
$1,100pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
21 May - 22 Jun
$1,154pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis

One-way flights to London from Lambert-St Louis Intl

The cheapest one-way flights from Lambert-St Louis Intl to London
3:40 pm - 7:00 am
WestJet
2 Stops
57h 20m
STL - LGW
WestJet
$407
WestJet
8:24 am - 6:35 am
Iberia
2 Stops
16h 11m
STL - LHR
Iberia
$482
KAYAK
9:23 am - 6:55 am
Multiple Airlines
2 Stops
39h 32m
STL - LHR
Multiple Airlines
$509
Kiwi.com

Related info for your journey

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

Flight FAQs

From Lambert-St Louis Intl 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.

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 Lambert-St Louis Intl to London for under $700 on Cheapflights?

Yes, there are multiple flights from Lambert-St Louis Intl to London for under $700. The cheapest flight booked recently is on Finnair for just $662, but on average you can expect to pay $732.

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

There are no nonstop flights from Lambert-St Louis Intl 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 Lambert-St Louis Intl to London for under $1,100?

There are currently 13+ open flights from Lambert-St Louis Intl to London within the next 7 days for less than $1,100.

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 Lambert-St Louis Intl to London?

There are many flights that can get you from Lambert-St Louis Intl to London in 10h 45m. Fly via American Airlines, Finnair, or KLM to get the fastest option. This flight may include one or multiple stops.

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

Flying on Finnair is currently your cheapest option to London, with prices starting at $662. Additional round-trip tickets that might be worth considering are offered by British Airways and KLM, with the lowest prices starting at $733 and $743, respectively. Finnair is currently priced 29% below the average price you’ll pay for this route.

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

To fly one-way, consider booking your trip with Iberia, which is currently one of the cheapest options available, starting at $357. Iberia is not the only option available. At the moment, WestJet is another option, for $407.

Alternative routes for Lambert-St Louis Intl 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 Lambert-St Louis Intl to London.
Today's exchange rate
$1 = £0.71
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 Lambert-St Louis Intl to London

The chart below displays the airlines Cheapflights users traveling from Lambert-St Louis Intl 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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