Find Cheap Flights from Lambert-St Louis to London (STL - LON)

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Thu 12/14
Thu 12/21
Any month
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Good to Know

Low Season:
February
Best time to beat the crowds
3%
expected price decrease
High Season:
June
Most popular time to fly
20%
expected price increase
Average Price:
$1235
(avg. price over the last 2 weeks)
Good Deal:
$932
or less (round trip)

When to Book Flights from Lambert-St Louis to London

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $932 or less.
The cheapest flight from Lambert-St Louis to London was found 68 days before departure, on average.
Book at least 3 weeks before departure in order to get a below-average price.
High season is considered to be May, June and July. The cheapest month to fly is February.
Morning departure is around 11% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Lambert-St Louis to London Flights

How long does a flight from Lambert-St Louis to London take?
An average nonstop flight takes 18h 45m, covering a distance of 4201 miles.
Which airlines provide the cheapest flights from Lambert-St Louis to London?
In the past 3 days, the cheapest round-trip tickets were found on Multiple Airlines ($519)
Do I need a passport to fly between Lambert-St Louis and London?
Yes.
What’s the cheapest day of the week to fly Lambert-St Louis to London?
For Lambert-St Louis to London, Sunday is the cheapest day to fly on average and Monday is the most expensive. Flying from London back to Lambert-St Louis, the best deals are generally found on Wednesday, with Friday being the most expensive.

Book cheap flights from Lambert-St Louis to London (round-trip)

Airports
Origin
St. Louis
$519
only
$519
Destination
London
$519
only
$519
Sun, Jan 14
STL
LGW
35h 55m
Wed, Jan 24
LGW
STL
51h 38m
Trip: 11 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Jan 14
STL
LGW
35h 55m
Tue, Jan 23
LGW
STL
35h 03m
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Jan 14
STL
LGW
35h 55m
Sun, Jan 21
LGW
STL
57h 01m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Jan 14
STL
LGW
35h 55m
Thu, Jan 25
LGW
STL
22h 13m
Trip: 12 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Jan 14
STL
LGW
35h 55m
Mon, Jan 22
LGW
STL
42h 33m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Jan 21
STL
LGW
38h 28m
Mon, Jan 29
LGW
STL
51h 38m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Jan 23
STL
LGW
20h 50m
Mon, Feb 5
LGW
STL
52h 33m
Trip: 14 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Jan 30
STL
LGW
20h 50m
Mon, Feb 5
LGW
STL
52h 33m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Jan 21
STL
LGW
38h 28m
Mon, Feb 5
LGW
STL
52h 33m
Trip: 16 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Jan 28
STL
LGW
38h 28m
Mon, Feb 5
LGW
STL
52h 33m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Jan 17
STL
LGW
35h 55m
Wed, Jan 24
LGW
STL
19h 31m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Jan 22
STL
LGW
18h 45m
Mon, Feb 5
LGW
STL
52h 33m
Trip: 15 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Jan 30
STL
LGW
20h 50m
Wed, Feb 7
LGW
STL
52h 33m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Jan 31
STL
LGW
19h 00m
Mon, Feb 5
LGW
STL
52h 33m
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Jan 21
STL
LGW
38h 28m
Wed, Feb 7
LGW
STL
52h 33m
Trip: 18 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Jan 24
STL
LGW
34h 47m
Mon, Feb 5
LGW
STL
52h 33m
Trip: 13 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Jan 28
STL
LGW
38h 28m
Wed, Feb 7
LGW
STL
52h 33m
Trip: 11 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Jan 24
STL
LGW
34h 47m
Wed, Feb 7
LGW
STL
52h 33m
Trip: 15 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Jan 31
STL
LGW
35h 55m
Wed, Feb 7
LGW
STL
52h 33m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Jan 15
STL
LGW
39h 07m
Wed, Jan 24
LGW
STL
51h 38m
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Show more results
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.