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

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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:
$1214
(avg. price over the last 2 weeks)
Good Deal:
$901
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 $900 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 3% cheaper 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 12h 05m, 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 WOW air ($560), Multiple Airlines ($650) and Finnair ($826).
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 Sunday is the most expensive. Flying from London back to Lambert-St Louis, the best deals are generally found on Monday, with Sunday being the most expensive.

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

Airports
Origin
St. Louis
$560
only
$560
Destination
London
$709
only
$709
$870
only
$870
$560
only
$560
Sun, Jul 1
STL
LGW
15h 15m
Sun, Jul 8
LGW
STL
14h 45m
Trip: 8 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 1351 reviews
Overall
5.9
Boarding
6.3
Comfort
5.6
Crew
6.9
Entertainment
4.2
Food
4.7
KEF
EWR
Mediocre 2.6

Kudos to the pilot, the flight was great! I can’t comment on food and entertainment due to my family and I having our own .

having to rush through customs in order to catch our connecting flight... wasn’t able to shop duty free... plane very uncomfortable... flight delayed

KEF
ORD
Mediocre 3.0

Crew was always friendly

They don't offer complimentary water on a 7 hour international flight. This should be illegal. The man who checked me in at Berlin airport was offensive and uncooperative. Baggage fees are so exorbitant that they essentially cancel out the fare savings, and then you still have to pay for everything. Every leg of every flight was delayed due to poor scheduling from the airline. Both times transferring through Iceland I had to sprint with my roller bag through the airport to make my connection to my next WOW flight. I fly 20-30 times a year and my travel day back to Chicago from Berlin was literally the worst flight experience I've ever had. I will never, EVER fly WOW again.

FRA
KEF
Good 6.3

The customer service agent at Frankfurt Main was great! The pilot was terrific... he got us there safely inspite of the bad weather conditions. The plane was very comfortable... lots of leg room

There was no seating area for us to wait at the gate... it was closed until a 1/2hr before the flight, which was delayed without giving us notice .

KEF
SXF
Okay 4.6

Disorganized and horribly untransparent. The flight left the airport more than an hour after we were supposed to, but we were given no updates. Instead, we stood in a hot tunnel for an hour, then in a hot shuttle, and then sat on the plane.

BWI
KEF
Mediocre 2.0

Wow airlines is the worst Airline

Sun, Jun 3
STL
LGW
15h 15m
Mon, Jun 11
LGW
STL
19h 55m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Apr 25
STL
LHR
12h 05m
Wed, May 2
LHR
STL
31h 17m
Trip: 8 days
7.7GoodShow reviews
Overall 7.7 Good
Based on 2905 reviews
Overall
7.9
Boarding
8.0
Comfort
7.5
Crew
8.3
Entertainment
7.3
Food
7.2
HEL
TXL
Okay 5.6

my luggage was misplaced and I didnt have it for 3 days.

HEL
BKK
Excellent 10.0

Super quiet and comfortable flight, dedicated service, punctuality.

I liked it all.

SVO
HEL
Good 6.5

The flight did eventually take off, unlike a few others leaving around the same time.

We were delayed several hours and were never told why. Mostly there were no Aeroflot staff at the gate to ask. When there was, they said they couldn't help us because our flight was a codeshare with FinnAir. At the last minute they switched gates, sending us all scurrying.

JFK
HEL
Excellent 10.0

Very nice staff. Probably one of the best flights

LED
HEL
Excellent 9.2

I liked that there was a smaller airplane on LED - HEL route: it gives more "feeling of flying" than the bigger planes do.

I didn't like the fact that it was not indicated in advance (when the tickets are sold) that LED - HEL route is operated by a different airline, even though that airline is a Finnair's partner. It would have been better to have a complete information up front. But the airplane and crew were excellent.

Tue, Mar 20
STL
LHR
12h 50m
Tue, Mar 27
LHR
STL
17h 38m
Trip: 8 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 1730 reviews
Overall
8.0
Boarding
8.0
Comfort
7.7
Crew
8.5
Entertainment
7.1
Food
7.4
AMS
LAX
Okay 4.0

The cabin crew were pretty good. That's about all that was good.

I paid almost $400 for upgraded seats. When I got to the airport-- no seats-- both ways!! i didn't even have regular seat assignments. I had to choose from the last few seats available. The ticket agent, the gate agent and the cabin crew all did nothing to make up for the fact that their system screwed up and stuck me in a cramped coach seat in the back of the plane for 11 hours-- TWICE! Beyond that, KLM must have one of the oldest fleets in the sky. Both ways LAX->AMS->LAX, I was on a 30-35 year old 747 with no wifi, no power and a ten-year-old entertainment system. Never again.

AMS
CPT
Good 6.3

Excellent experience with the cabin crew.

Seats on the 777 were too narrow. This 777 had a 3-4-3 seating arraignment, it would have been better with a 3-3-3, similar to a 787 configuration. With the current layout, even with an aisle seat, I was sitting in the aisle. And I am not a large person! The flight was full, so use the 787 and two daily non-stops. For a twelve hour flight, the food was only Okay, could have been better and with a better selection. Meal timing was poor.

AMS
BLL
Good 6.5

Nice seats, comfortable.

Again, no aisle seat for SkyTeam Gold member. Also, my baggage was lost. First bag arrived a day late, second after I had left Billund and it was six days before the bag with my clothes reached me. I was told I will have 100 euro credit for clothing, but in the winter and for 6 days, this was not even close to the amount I needed for clothing and necessities, to have my time here.

SFO
AMS
Excellent 10.0

The flight was great.

AMS
HUY
Excellent 8.6

The last two times we connected in Amsterdam to Humberside our luggage was delayed. This time it wasn’t. The simple things give the greatest satisfaction

Wed, May 2
STL
LCY
16h 46m
Thu, May 10
LCY
STL
53h 40m
Trip: 9 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 15361 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
LHR
AMS
Good 6.0

Carrier was small. Crew could have been more helpful and courteous.

LHR
CDG
Excellent 10.0

Love BA airlines. Just be on time get on the plane and they will get you to where you want to go.

LHR
SFO
Excellent 8.3

Flight was delayed by an hour.

YUL
LHR
Excellent 8.6

On time and staff

Too little space for seating!

BWI
LHR
Good 6.0

Sitting in exist row with leg room

Seats are small, not enough elbow space. Movie selection was bad.

Mon, Jun 4
STL
LCY
15h 00m
Wed, Jun 13
LCY
STL
14h 08m
$1067
Trip: 10 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 16027 reviews
Overall
8.0
Boarding
8.1
Comfort
7.8
Crew
8.4
Entertainment
7.5
Food
7.4
BOS
BNA
Excellent 8.0

Service vey Good. Nice choices. Comfort seating very nice

WiFi awful. Useless.

ATL
MEX
Excellent 10.0

Flight was on time, crew was friendly, plane was clean, and boarding was painless and efficient. Food was served which was a huge plus. I appreciate having a choice of almonds for a snack.

SMF
ATL
Excellent 8.6

The crew were so polite and happy!

Those seats! UGH!

ECP
ATL
Excellent 9.6

We have been on 6 flights over the last 8 days, all with Delta and we have already started telling people how wonderful the service was. Sherry on this last flight was amazing, working so hard all by herself as our flight attendant. We were very impressed. And the pilots all came out to say goodbye and thank you. All very nice...esp for me who needed some wheelchair assistance. We will certainly fly with you again in the future.

Smaller plane but ok for short flight

SJC
SLC
Excellent 8.8

Good clean aircraft. Fairly comfortable seats. Even had a power outlet in my row. Not too bad for an aircraft from the late 70s.

for some reason, i had to pay to gate check a bag. It didnt seem like anyone else did while boarding my flight.

Tue, Aug 7
STL
LGW
15h 35m
Mon, Aug 13
LGW
STL
14h 45m
Trip: 7 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 1351 reviews
Overall
5.9
Boarding
6.3
Comfort
5.6
Crew
6.9
Entertainment
4.2
Food
4.7
BWI
KEF
Excellent 8.6

I liked that even though it’s a budget airline I was thourpughly comfortable from start to finish. Staff was very nice.

The seats are what you would expect of a budget airline but i didn’t mind it so much. The only thing that I wasn’t amazingly pleased about was that even for water I could only get a water bottle which I had to pay for.

KEF
YUL
Good 6.0

Lateness of the flight that was delayed

KEF
BWI
Excellent 8.0

Crew is always fantastic and helpful, even when dealing with grumpy entitled passengers who didn’t bother to read the airline details and are shocked when they discover nothing is free.

KEF really needs to enlarge their airport if they’re going to market tourism

BWI
KEF
Mediocre 2.0

Wow airlines is the worst Airline

KEF
EWR
Mediocre 2.6

Kudos to the pilot, the flight was great! I can’t comment on food and entertainment due to my family and I having our own .

having to rush through customs in order to catch our connecting flight... wasn’t able to shop duty free... plane very uncomfortable... flight delayed

Mon, Feb 19
STL
LHR
25h 45m
Wed, Mar 7
LHR
STL
20h 55m
$1186
Trip: 17 days
7.6GoodShow reviews
Overall 7.6 Good
Based on 3936 reviews
Overall
7.8
Boarding
7.9
Comfort
7.6
Crew
8.2
Entertainment
7.2
Food
7.1
IAD
CPH
Mediocre 3.6

Plane was fine and it arrived on time.

Main meal was awful. Crew was hard to find. Also water or juice was not served on flight after the meal (for hydration).

CPH
ORD
Good 6.3

A lot of leg room

No snack served before dinner, no choice of dinner food. over see flight and the only food is dinner??? My laggage had priority tag but got out last and in resolt of it I missed the connecting flight to Boston!!! Damaged laggage

KRK
CPH
Good 6.6

Mid day flight , no food or snack , how cheep will the airlines go?

ORD
CPH
Excellent 9.0

It was exceptionally on time. Very informative captain without being chatty. Crew was efficient but not very friendly. Food was tasty and sufficient.

TOS
OSL
Excellent 8.3

The food.

The seat are so narrow

Sun, Aug 5
STL
LCY
17h 45m
Tue, Aug 14
LCY
STL
20h 08m
$1206
Trip: 10 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 18739 reviews
Overall
8.2
Boarding
8.2
Comfort
7.9
Crew
8.5
Entertainment
7.8
Food
7.7
DEL
FRA
Mediocre 3.0

They made me sit next to a special needs person and did not warn me. I didn’t signup to keep helping the elderly.

FRA
SEA
Good 7.6

Flight out was delayed by four and a half hours, missed connection was a pain. Was not aware that Lufthansa changed their policy. To reserve seats you have to pay hundreds of dollars, which was not made clear while booking. Further the quality of their food was significantly degraded.

CAI
FRA
Excellent 8.0

Prompt, great crew

No power ports, entertainment options

FRA
BEY
Okay 5.3

Your crew is amazing.

Chaos at the gate, TV displays facing the side wall instead of the waiting area, we couldn’t see anything. Need more organization in line. Also, why there is no charger on board for cell phones? No TV entertainment or music or anything. It was clearly lacking the sophistication and class of Lufthansa.

SEA
FRA
Excellent 8.3

Crew is very friendly, seats are extremely comfortable and good room overall, comfortable flight.

Hi, To be honest, it was embarrassing to serve that dish on such a major airline. Chicken with bbq sauce and corn or something like that. Was distasteful I couldn’t take more than 2 small bites.

Tue, May 8
STL
LGW
20h 02m
Tue, May 29
LGW
STL
20h 30m
Trip: 22 days
Overall 0.0 Poor
Based on 0 reviews
Sun, May 20
STL
LGW
17h 40m
Thu, May 31
LGW
STL
17h 33m
$1361
Trip: 12 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4231 reviews
Overall
7.6
Boarding
7.7
Comfort
7.3
Crew
8.0
Entertainment
7.0
Food
6.9
DUB
HAM
Okay 5.6

The plane was just fantastic: comfortable, elegant, quiet. Gets the best note!

A free coffee - which was excellent by the way - and a little roll would have been nice.

DUB
LHR
Excellent 8.0

Could not check in on-line from Dublin on either Air canada or Aer Linguis websites. Time to sort out this long-standing problem

DUB
YYZ
Excellent 10.0

They really did a great job, kept us informed about what was going on,staff was quick, organized and pleasant. I have to say, best food on a flight that I have had in a very LONG time,!

EWR
DUB
Good 6.6

The Crew was lovely on the Transatlantic flight. The Dublin-HH crew was polite, one older lady was warm. Of course I would have like free wine, but I imagine many passengers might abuse the offer...

Narrow seats, not spacy feet place (fortunately a nice gentleman in the middle of us, 2 people, found a seat with more space - he was a very long and not too skinny man. Only 3 toilets for both isles of passengers on a TRANSATLANTIC flight.

DUB
JFK
Excellent 10.0

All worked smoothly

Service and friendliness

Sat, Aug 18
STL
LGW
15h 15m
Tue, Aug 28
LGW
STL
14h 45m
Trip: 11 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 1351 reviews
Overall
5.9
Boarding
6.3
Comfort
5.6
Crew
6.9
Entertainment
4.2
Food
4.7
BWI
KEF
Mediocre 2.0

Wow airlines is the worst Airline

KEF
BWI
Excellent 8.0

Crew is always fantastic and helpful, even when dealing with grumpy entitled passengers who didn’t bother to read the airline details and are shocked when they discover nothing is free.

KEF really needs to enlarge their airport if they’re going to market tourism

KEF
ORD
Mediocre 3.0

Crew was always friendly

They don't offer complimentary water on a 7 hour international flight. This should be illegal. The man who checked me in at Berlin airport was offensive and uncooperative. Baggage fees are so exorbitant that they essentially cancel out the fare savings, and then you still have to pay for everything. Every leg of every flight was delayed due to poor scheduling from the airline. Both times transferring through Iceland I had to sprint with my roller bag through the airport to make my connection to my next WOW flight. I fly 20-30 times a year and my travel day back to Chicago from Berlin was literally the worst flight experience I've ever had. I will never, EVER fly WOW again.

FRA
KEF
Good 6.3

The customer service agent at Frankfurt Main was great! The pilot was terrific... he got us there safely inspite of the bad weather conditions. The plane was very comfortable... lots of leg room

There was no seating area for us to wait at the gate... it was closed until a 1/2hr before the flight, which was delayed without giving us notice .

KEF
YUL
Good 6.0

Lateness of the flight that was delayed

Tue, Jun 5
STL
LGW
15h 35m
Mon, Jun 11
LGW
STL
19h 55m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Thu, May 17
STL
LGW
19h 02m
Thu, May 24
LGW
STL
17h 40m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Sun, May 20
STL
LHR
16h 00m
Thu, May 31
LHR
STL
33h 50m
Trip: 12 days
7.7GoodShow reviews
Overall 7.7 Good
Based on 2905 reviews
Overall
7.9
Boarding
8.0
Comfort
7.5
Crew
8.3
Entertainment
7.3
Food
7.2
LED
HEL
Good 6.5

Nice crew that were helpful.

Small plane, cramped seating.

LED
HEL
Excellent 9.2

I liked that there was a smaller airplane on LED - HEL route: it gives more "feeling of flying" than the bigger planes do.

I didn't like the fact that it was not indicated in advance (when the tickets are sold) that LED - HEL route is operated by a different airline, even though that airline is a Finnair's partner. It would have been better to have a complete information up front. But the airplane and crew were excellent.

HEL
NRT
Excellent 9.3

I really enjoyed the whole flight - Finnair is definitely one of the best airlines.

I wish there was a bigger choice of classical music in the entertainment program.

JFK
HEL
Excellent 8.3

it was just okay. nothing spectacular.

my luggage was misplaced and I didnt have it for 3 days.

HEL
TXL
Okay 5.6

my luggage was misplaced and I didnt have it for 3 days.

Mon, Apr 2
STL
LCY
15h 53m
Tue, May 15
LCY
STL
20h 04m
Trip: 44 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 15361 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
BWI
LHR
Good 6.0

Sitting in exist row with leg room

Seats are small, not enough elbow space. Movie selection was bad.

MAN
LHR
Excellent 10.0

The flight was able to board early and arrive early. Very friendly service, enjoyable flight.

YYZ
LHR
Excellent 8.3

Customer service.

Entertainment need more movies

LHR
AMS
Good 6.0

Carrier was small. Crew could have been more helpful and courteous.

YUL
LHR
Excellent 8.6

On time and staff

Too little space for seating!

Mon, May 14
STL
LHR
19h 24m
Mon, May 21
LHR
STL
13h 20m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Jul 3
STL
LGW
15h 35m
Sat, Jul 21
LGW
STL
29h 25m
Trip: 19 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 1351 reviews
Overall
5.9
Boarding
6.3
Comfort
5.6
Crew
6.9
Entertainment
4.2
Food
4.7
FRA
KEF
Good 6.3

The customer service agent at Frankfurt Main was great! The pilot was terrific... he got us there safely inspite of the bad weather conditions. The plane was very comfortable... lots of leg room

There was no seating area for us to wait at the gate... it was closed until a 1/2hr before the flight, which was delayed without giving us notice .

KEF
YUL
Good 6.0

Lateness of the flight that was delayed

BWI
KEF
Mediocre 2.0

Wow airlines is the worst Airline

CDG
KEF
Good 7.0

Price, flight attendant services/attitudes

Boarding process, no entertainment

BWI
KEF
Okay 4.6

Flight delay, narrow space between seats.

Thu, May 24
STL
LHR
12h 10m
Tue, May 29
LHR
STL
13h 40m
Trip: 6 days
7.7GoodShow reviews
Overall 7.7 Good
Based on 2905 reviews
Overall
7.9
Boarding
8.0
Comfort
7.5
Crew
8.3
Entertainment
7.3
Food
7.2
JFK
HEL
Excellent 8.3

it was just okay. nothing spectacular.

my luggage was misplaced and I didnt have it for 3 days.

HEL
JFK
Okay 4.0

Staff wasn’t helpful and gave false information

HEL
TXL
Okay 5.6

my luggage was misplaced and I didnt have it for 3 days.

LED
HEL
Excellent 9.2

I liked that there was a smaller airplane on LED - HEL route: it gives more "feeling of flying" than the bigger planes do.

I didn't like the fact that it was not indicated in advance (when the tickets are sold) that LED - HEL route is operated by a different airline, even though that airline is a Finnair's partner. It would have been better to have a complete information up front. But the airplane and crew were excellent.

HEL
NRT
Excellent 9.3

I really enjoyed the whole flight - Finnair is definitely one of the best airlines.

I wish there was a bigger choice of classical music in the entertainment program.

Sun, Jun 3
STL
LHR
15h 15m
Mon, Jun 11
LHR
STL
13h 20m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Show more results

Lambert-St Louis to London Flight Information

Flights Arrive in London
Flights Depart from Lambert-St Louis
Flight Price $560
Distance 4201 miles
Airlines WOW air, Finnair, KLM, British Airways, Delta, SAS, Lufthansa, Aer Lingus
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Why aren’t prices accurate 100% of the time?
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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.