STL - LON

$230 Find Cheap Flights from St. Louis to London - Compare and Save

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Everything you should know

Cheapest round-trip
$654
Typical prices: $720-$1,273
Multiple Airlines
Thu 10/18Sun 11/4
STL - LGW • 1 stop
Cheapest non-stop
$987
Typical prices: $775-$1,376
British Airways
Sun 10/14Sun 10/21
STL - LHR • Non-stop
Nonstop flights
You can fly direct with British Airways. Average duration is 8h 00m
Direct flights
+1
Direct flights
+1
Top routes
Cheapest • 12% average savings
Most popular
Insights
Insights
Avoid delays
Most punctual • 78% on-time
Best time • Fewest delays
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 25% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 31% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg $416 (round-trip)
Shortest trip • 11h 25m (one-way)
Insights
Insights
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Flight Deals

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

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to London

Sun, Oct 18 - Wed, Nov 4
Multiple Airlines Logo
4:30 pm - 10:00 amSTL  Lambert-St Louis-LGW London Gatwick
35h 30m1 stop Orlando
Multiple Airlines Logo
10:10 am - 9:40 amLGW  London Gatwick-STL Lambert-St Louis
29h 30m2 stops Orlando Atlanta Hartsfield-Jackson
$654Multiple Airlines
Fri, Oct 23 - Thu, Nov 5
Multiple Airlines Logo
6:35 pm - 10:00 amSTL  Lambert-St Louis-LGW London Gatwick
33h 25m2 stops Atlanta Hartsfield-Jackson Orlando
Multiple Airlines Logo
11:00 am - 11:16 pmLGW  London Gatwick-STL Lambert-St Louis
18h 16m1 stop Orlando
$654Multiple Airlines
Mon, Jan 11 - Wed, Jan 13
Lufthansa Logo
7:04 pm - 6:30 pmSTL  Lambert-St Louis-LHR London Heathrow
17h 26m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss
Lufthansa Logo
6:30 am - 1:45 pmLHR  London Heathrow-STL Lambert-St Louis
13h 15m1 stop Frankfurt am Main
$749Lufthansa
Mon, Jan 11 - Wed, Jan 13
United Airlines Logo
6:30 am - 7:10 amSTL  Lambert-St Louis-LHR London Heathrow
18h 40m2 stops Newark Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
6:50 am - 3:41 pmLHR  London Heathrow-STL Lambert-St Louis
14h 51m2 stops Brussels Bruxelles-National Chicago O'Hare Intl
$751United Airlines
Mon, Jan 11 - Wed, Jan 13
United Airlines Logo
11:45 am - 10:25 amSTL  Lambert-St Louis-LHR London Heathrow
16h 40m1 stop Newark
United Airlines Logo
6:50 am - 3:41 pmLHR  London Heathrow-STL Lambert-St Louis
14h 51m2 stops Brussels Bruxelles-National Chicago O'Hare Intl
$752United Airlines
Wed, Feb 3 - Mon, Feb 8
Iberia Logo
12:55 pm - 6:50 amSTL  Lambert-St Louis-LHR London Heathrow
11h 55m1 stop Dallas/Fort Worth
Iberia Logo
7:40 pm - 10:44 pmLHR  London Heathrow-STL Lambert-St Louis
33h 04m2 stops Madrid Barajas Philadelphia
$852Iberia
Mon, Jan 18 - Mon, Jan 25
Iberia Logo
12:55 pm - 10:00 amSTL  Lambert-St Louis-LHR London Heathrow
15h 05m1 stop Dallas/Fort Worth
Iberia Logo
7:40 pm - 10:44 pmLHR  London Heathrow-STL Lambert-St Louis
33h 04m2 stops Madrid Barajas Philadelphia
$852Iberia
Tue, Dec 1 - Tue, Dec 15
Delta Logo
12:20 pm - 11:40 amSTL  Lambert-St Louis-LHR London Heathrow
17h 20m1 stop Atlanta Hartsfield-Jackson
Delta Logo
10:00 am - 8:51 pmLHR  London Heathrow-STL Lambert-St Louis
16h 51m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County
$867Delta
Tue, Dec 1 - Thu, Dec 10
Delta Logo
7:05 am - 6:25 amSTL  Lambert-St Louis-LHR London Heathrow
17h 20m1 stop Atlanta Hartsfield-Jackson
Delta Logo
11:45 am - 8:51 pmLHR  London Heathrow-STL Lambert-St Louis
15h 06m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County
$867Delta
Wed, Jan 27 - Wed, Feb 3
Lufthansa Logo
3:40 pm - 4:50 pmSTL  Lambert-St Louis-LHR London Heathrow
19h 10m1 stop Frankfurt am Main
Lufthansa Logo
6:30 am - 1:45 pmLHR  London Heathrow-STL Lambert-St Louis
13h 15m1 stop Frankfurt am Main
$878Lufthansa
Booking Insights

Price, demand and travel trends for St. Louis to London flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from St. Louis to London with more confidence.

What is the cheapest St. Louis to London flight route?

St. Louis (STL) to London Gatwick Airport (LGW) is the cheapest St. Louis to London route, averaging $734 round-trip. Other St. Louis to London routes average $884, based on KAYAK data over the past 12 months.

What's the cheapest day of the week to fly from St. Louis to London?

Thursday is the cheapest day of the week to fly from St. Louis to London, it is 6% cheaper than the average day. Friday is the most expensive day with flight prices 10% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • October is the cheapest month to fly from St. Louis to London at $653 round-trip.
  • June ($1,433) and July ($1,318) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 119% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from St. Louis to London the cheapest?

Flights from St. Louis to London are cheapest 5 weeks before departure. Booking in this window typically costs about 25% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Key details for St. Louis to London flights

Low season

January

Cheapest flight

$230
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 51% increase in price.
Flight from St. Louis to London Gatwick Airport

When to book flights from St. Louis to London

Are your dates flexible? Find out the best times to travel from St. Louis to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your St. Louis to London flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Are there hotels near London airports?

    There are a lot of hotels at and surrounding Heathrow Airport, and they provide rooms at prices to suit a wide range of budgets. The Yotel is a hotel with a pod-like design that is located inside Terminal 4 and is styled like the first-class cabin of an airplane. You may book rooms on an hourly basis, which is an excellent choice if you have a stopover and need to get some sleep before continuing on your journey.

  • What is the most reliable way to get to the city center from the Heathrow Airport London (LHR)?

    The most reliable way to get into s the town center is to take either the Tube's Piccadilly Line or the Heathrow Express train. This option is best if you only have to wait for less than 6h, but it is a lot more expensive than the Tube.

  • Are there banking services available at Lambert-St Louis Airport (STL)?

    A full-service US Bank offers comprehensive banking and foreign exchange services. It is situated in Terminal 1, Lower Level, across from Great American Bagel.

  • Does Lambert-St Louis Airport (STL) have lactating rooms for mothers?

    St. Louis Lambert International Airport (STL) has a private, designated place for nursing mothers. The room is situated after security checkpoints on all three concourses, close to Gates A10, C9, and E33.

  • Which airlines offer extra legroom and free seat selection on St. Louis to London flights?

    Among airlines operating St. Louis to London flights:

    • British Airways: offers extra legroom
    • Iberia: offers free seat selection
    • American Airlines: offers free seat selection
    • Finnair: offers extra legroom; offers free seat selection
    • Aer Lingus: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • What airlines are available from St. Louis to London?

    Only British Airways operates flights between St. Louis and London.

  • Which airports can I use when flying from St. Louis to London?

    Flights from St. Louis to London usually depart from Lambert-St Louis (STL) and may arrive at several airports in London area, including London City (LCY), London Gatwick (LGW), London Heathrow (LHR), London Luton (LTN), London Southend (SEN) and London Stansted (STN).

  • Which airlines include bags at no extra cost on St. Louis to London flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • British Airways: a cabin bag and a checked bag in Economy Class
    • Iberia: a cabin bag and a checked bag in Economy Class
    • American Airlines: a cabin bag and a checked bag in Economy Class

    Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

  • What cabin classes can I book on flights from St. Louis to London?

    Four cabin classes are available on flights from St. Louis to London:

    • Economy Class
    • Premium Economy Class
    • Business Class
    • First Class

    Prices vary by airline.

  • How much can I save by taking a layover when flying from St. Louis to London?

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $416 round-trip via Zurich (ZRH), compared to $1,025 for nonstop.

  • What is the standard checked-bag allowance on flights from St. Louis to London?

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $70–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

  • Which airports do connecting flights from St. Louis to London pass through?

    One-stop flights from St. Louis to London most commonly connect through:

    • Chicago O'Hare Intl (ORD) - 48% of one-stop connections
    • Atlanta Hartsfield-Jackson (ATL) - 18% of one-stop connections
    • Toronto Pearson Intl (YYZ) - 10% of one-stop connections
    • Montreal Pierre Elliott Trudeau Intl (YUL) - 6% of one-stop connections

    Chicago O'Hare Intl (ORD) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from St. Louis to London?

    Yes. Being flexible with your travel dates can save you up to 15% on the St. Louis to London route. Thursday is the cheapest departure day at $894 round-trip on average, while Friday is the most expensive at $1,046, a difference of $152. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • At what point is a flight considered delayed from St. Louis to London?

    A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the St. Louis to London route, 22% of flights were delayed in the past 3 months, with delays averaging 1 hour 58 minutes.

  • What popular places can I visit in London?

    Some of the most popular sights in London are Paddington Station, Central London and London Victoria Station. These are among the most viewed places in London on KAYAK.

  • How long is a flight from St. Louis to London?

    A nonstop flight from St. Louis to London takes 8h 00m, covering 4,198 miles.

  • What are the earliest and latest flights from St. Louis to London?

    These are the earliest and latest flight times available from St. Louis to London:

    • Earliest: departs at 9:35 pm and lands at 5:35 am
    • Latest: departs at 9:40 pm and lands at 5:40 am.

    The flight takes about 8h 00m.

  • How expensive are last-minute St. Louis to London flights?

    Last-minute fares on this route - booked within 2 weeks of departure - run 14% above the route average of $948. Book 5 weeks before departure for the lowest fares.

  • Do I need a passport to fly from St. Louis to London?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How are flight prices from St. Louis to London looking right now?

    One-way fares from St. Louis to London are currently lower than usual. Average one-way flight prices are about $332, which is 37% below the typical average for this route.

  • How does British Airways’s on-time performance compare to other airlines on St. Louis to London flights?

    British Airways is the only airline operating St. Louis to London flights. 78% of its flights are on time.

  • How do delay rates compare for morning and evening flights from St. Louis to London?

    Night flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

  • How much time can I save by choosing a different layover airport from St. Louis to London?

    Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 11h 25m, compared with 11h 39m via Chicago O'Hare Intl (ORD) and 12h 04m via Newark (EWR).

  • What is the time difference between St. Louis and London?

    London is 6 hours ahead of St. Louis (British Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available in London?

    Since London is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
    Near London Heathrow Airport (LHR) — daily rates from around $7:

    · GREEN MOTION
    · DRIVALIA
    · Europcar
    · Alamo
    · Hertz

    Near London Gatwick Airport (LGW) — daily rates from around $8:

    · GREEN MOTION
    · DRIVALIA
    · U-Save
    · Europcar
    · Alamo

    Near London City Airport (LCY) — daily rates from around $11:

    · GREEN MOTION
    · Budget
    · Hertz
    · Avis
    · Sixt

    Near London Luton Airport (LTN) — daily rates from around $11:

    · GREEN MOTION
    · DRIVALIA
    · Alamo
    · Europcar
    · Budget

    Near London Stansted Airport (STN) — daily rates from around $10:

    · GREEN MOTION
    · DRIVALIA
    · Europcar
    · Alamo
    · U-Save

  • How much should I expect to pay for a St. Louis to London flight?

    Round-trip flights from St. Louis to London range from $720 to $1,273, with an average of $948 over the past 12 months. Anything below $720 counts as a good deal.

Your guide to booking St. Louis to London flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Thursday departure instead of Friday. On this route, Thursday flights average $894 - about $152 less than Friday (15% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 5 weeks before you fly. On this route, that window historically saves about 25% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your St. Louis to London trip for October. Fares historically average $653 round-trip in that month - typically $780 less than the most expensive month, which is June (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Zurich Airport (ZRH) can be cheaper than flying direct. The cheapest layover option averages $416 round-trip on this route - about $609 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, hotels close to the airport you're flying into can be a convenient option.

    Near London City Airport

    · Good Hotel London
    · Novotel London Excel
    · Aloft London Excel

    Near London Heathrow Airport

    · Hilton London Heathrow Airport

    Near London Gatwick Airport

    · Premier Inn London Gatwick Airport
  • If you want to travel to London from Lamber St Louis, there are three main airports you can use for your arrivals, London Heathrow Airport (LHR), Gatwick Airport (LGW), and London City Airport (LCY). London Heathrow airport is the main international airport connecting cities and nearby countries.
  • There is a lounge that you may access by either making a payment at the door or enrolling in a lounge membership program, and this is regardless of the class of service that you are flying at Lambert-St Louis (STL). There is also a facility called the USO that provides active members of the United States military and their families with access to a lounge that is free of charge.
  • You may take your children to the play area for youngsters if you want to make sure that they use up all of their excess energy before taking off on their flight. An exhibit with a focus on transportation may be seen at the St. Louis International Play Port, which can be found in the STL airport near Gate C3.
  • If you have any inquiries while at St Louis Airport, you can go to one of the information desks located around the airport for help. Passengers in Terminal 2 have many options for getting in touch with the Information Booth. You may use the courtesy phones that are situated at Gate E10 or in the baggage claim area just across from the Southwest Airlines Baggage Office.
  • Heathrow Airport (LHR) does not provide complimentary wireless Internet access. Instead, it offers Boingo, a pay-as-you-go Wi-Fi service. There are additional PCs with wired Internet connections available at each terminal, however, they are also for a fee. However, if you pay to enter an executive lounge such as o1 Lounges, Plaza Premium, and Club Aspire, you will enjoy free internet access. London City Airport and Gatwick Airport on the other hand offer complimentary Wi-Fi connection and each lounge has a shower.
  • If you need assistance with your bags, there are baggage carts available for a fee at the departures area of Terminal 1 and in the baggage claim sections of Terminals 1 and 2 respectively at STL Airport.

Prefer to fly direct from St. Louis to London?

 
Find which airlines fly direct from Lambert-St Louis Airport to London, which days they fly and book direct flights.

Direct departures

Lambert-St Louis to London

Tuesday

British Airways

British Airways

Wednesday

British Airways

British Airways

Friday

British Airways

British Airways

Sunday

British Airways

British Airways

See more direct flights

Direct returns

London to Lambert-St Louis

Tuesday

British Airways

British Airways

Wednesday

British Airways

British Airways

Friday

British Airways

British Airways

Sunday

British Airways

British Airways

See more direct flights

Everything you need to know for your flight from St. Louis to London

Information on your arrival and departure airports