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Cheap Flights from London (LHR) to St. Louis (STL)

View AU$915 flight on Fri, 30 Oct 2026Opens in a new window

Popular airlines from Heathrow Airport (LHR) to Lambert-St. Louis International Airport (STL)

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Cheap Flights from London (LHR) to St. Louis (STL)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, 30 July - Thu, 6 Aug
LHR
London
STL
St. Louis
AU$1,934 Return, found 2 days ago
AU$1,934
Return
found 2 days ago
Select Air Canada flight, departing Thu, 30 July from London to St. Louis, returning Thu, 6 Aug, priced at AU$1,934 found 2 days ago
Air Canada
Thu, 30 July - Thu, 6 Aug
LHR
London
STL
St. Louis
AU$1,941 Return, found 2 days ago
AU$1,941
Return
found 2 days ago
Select Air Canada flight, departing Thu, 30 July from London to St. Louis, returning Thu, 6 Aug, priced at AU$1,941 found 2 days ago
Air Canada
Thu, 30 July - Thu, 6 Aug
LHR
London
STL
St. Louis
AU$1,962 Return, found 2 days ago
AU$1,962
Return
found 2 days ago
Select Air Canada flight, departing Thu, 30 July from London to St. Louis, returning Thu, 6 Aug, priced at AU$1,962 found 2 days ago
Air Canada
Thu, 30 July - Thu, 6 Aug
LHR
London
STL
St. Louis
AU$1,967 Return, found 2 days ago
AU$1,967
Return
found 2 days ago
Select Air Canada flight, departing Thu, 30 July from London to St. Louis, returning Thu, 6 Aug, priced at AU$1,967 found 2 days ago
Air Canada
Thu, 30 July - Thu, 6 Aug
LHR
London
STL
St. Louis
AU$1,972 Return, found 2 days ago
AU$1,972
Return
found 2 days ago
Select Air Canada flight, departing Thu, 30 July from London to St. Louis, returning Thu, 6 Aug, priced at AU$1,972 found 2 days ago
Air Canada
Thu, 30 July - Thu, 6 Aug
LHR
London
STL
St. Louis
AU$1,974 Return, found 2 days ago
AU$1,974
Return
found 2 days ago
Select Air Canada flight, departing Thu, 30 July from London to St. Louis, returning Thu, 6 Aug, priced at AU$1,974 found 2 days ago
Air Canada
Thu, 30 July - Thu, 6 Aug
LHR
London
STL
St. Louis
AU$1,979 Return, found 2 days ago
AU$1,979
Return
found 2 days ago
Select Air Canada flight, departing Thu, 30 July from London to St. Louis, returning Thu, 6 Aug, priced at AU$1,979 found 2 days ago
United
Thu, 30 July - Thu, 6 Aug
LHR
London
STL
St. Louis
AU$1,986 Return, found 2 days ago
AU$1,986
Return
found 2 days ago
Select United flight, departing Thu, 30 July from London to St. Louis, returning Thu, 6 Aug, priced at AU$1,986 found 2 days ago
Austrian Airlines
Thu, 30 July - Thu, 6 Aug
LHR
London
STL
St. Louis
AU$2,052 Return, found 2 days ago
AU$2,052
Return
found 2 days ago
Select Austrian Airlines flight, departing Thu, 30 July from London to St. Louis, returning Thu, 6 Aug, priced at AU$2,052 found 2 days ago
Finnair
Thu, 30 July - Thu, 6 Aug
LHR
London
STL
St. Louis
AU$2,086 Return, found 2 days ago
AU$2,086
Return
found 2 days ago
Select Finnair flight, departing Thu, 30 July from London to St. Louis, returning Thu, 6 Aug, priced at AU$2,086 found 2 days ago

Find the cheapest month to fly from London (LHR) to St. Louis (STL)

February is typically the cheapest month to fly

From AU$868 - AU$1,939 per traveller.

Frequently asked questions

How much does a flight from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
You can find cheap one-way flights from AU$915 and cheap return flights from AU$1,934 LHR to STL with Expedia. One-way flights typically cost between AU$792 and AU$1,647 and return flights often range between AU$1,265 and AU$6,192. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when LHR to STL ticket fares go up or down.
What is the cheapest month to fly from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The cheapest months to fly from LHR to STL are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Only one airline offers direct flights from London Heathrow (LHR) to St. Louis, MO (STL-Lambert-St. Louis Intl.). British Airways operates 7 direct flights from London Heathrow (LHR) to St. Louis, MO (STL-Lambert-St. Louis Intl.) every week.
How do I find cheap flights from London (LHR) to St. Louis, MO (STL)?
To find a cheap flight from London (LHR) to St. Louis, MO (STL), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best airline to fly with from London Heathrow (LHR) to St. Louis, MO (STL) will differ from traveler to traveler. If you like to fly early, British Airways offers early morning flights. If price is the most important factor, British Airways typically offers the lowest fares. British Airways offers the most daily flights from London Heathrow (LHR) to St. Louis, MO (STL), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
There are approximately 105 connecting flights per day from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.). Some common connection points include Dublin (DUB), O'Hare Intl. (ORD), and John F. Kennedy Intl. (JFK).
What is the earliest flight from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The earliest flight from London Heathrow (LHR) to St. Louis, MO (STL-Lambert-St. Louis Intl.) typically departs around 6:00 AM. This service is offered by airlines such as Air Baltic, Swiss International Air Lines, and Air Canada. This is a seasonal service, active only in May. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You'll typically find the most flights from London Heathrow (LHR) to St. Louis, MO (STL) on a Monday, with around 89 flights available. This gives you a good selection of options for your journey. Major airlines on this route include American Airlines, United, and British Airways. Mondays offer notably more flight options compared to other days of the week, so if flexibility is key, consider flying then.
What are the most popular departure times for flights from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from London Heathrow (LHR) to St. Louis, MO (STL) are in the morning, from 9am to 12pm. Many major carriers, including American Airlines, Delta and British Airways, offer flights during this window. Many travellers prefer these times because it allows for a morning departure and an afternoon arrival, giving you time to settle in upon arrival.
How long does it take to fly from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
A direct flight from London Heathrow (LHR) to St. Louis, MO (STL) typically takes around 9 hours. This route covers a distance of approximately 6,743 kilometers. If you opt for a flight with one stop, your journey will usually be longer, taking about 13 hours. Flights with two or more stops will extend your travel time further, typically around 16 hours 48 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.
Can you fly business or first class from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You can fly business class or first class between LHR and STL. Airlines that offer business class service on this route include:

  • British Airways
  • American Airlines
  • Delta
  • Lufthansa
  • Air Canada
  • Med View Airlines
  • United
  • Air Baltic
  • Swiss International Air Lines
  • Brussels Airlines
  • KLM
  • SAS
  • Virgin Atlantic

First class cabins are available on British Airways and American Airlines.
How do I earn miles on a London (LHR) to St. Louis, MO (STL) flight with Expedia?
It's easy to earn miles on a London (LHR) to St. Louis, MO (STL) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for St. Louis, MO (STL) from London (LHR)?
If you're planning to travel to St. Louis from Heathrow (LHR), you can fly directly into Lambert-St. Louis Intl. (STL). Some flights may connect through major hubs like Schiphol (AMS), Roissy-Charles de Gaulle (CDG), or Logan Intl. (BOS) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from London (LHR) to St. Louis, MO (STL) at the last minute?
Typically, booking a last minute flight from London (LHR) to St. Louis, MO (STL) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a London (LHR) to St. Louis, MO (STL) flight and hotel package?
Securing a London (LHR) to St. Louis, MO (STL) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from London (LHR) to St. Louis, MO (STL)?
If you booked your London (LHR) to St. Louis, MO (STL) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Heathrow
Destination airport
Lambert-St. Louis Intl.
Return price
AU$1,933
Distance
6703 km
Average flight time
9 hours 5 mins

Book with confidence

Your quick guide to flights from London to St. Louis

Pick up great flights from London to St. Louis

With Expedia, you have your pick of flights a day with 20 airlines covering flights from London to St. Louis. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from London to St. Louis that take around hours.

Find cheap flights from London to St. Louis

From the great flight deals with prices currently ranging from AU$1,934 to AU$2,086, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from London to St. Louis around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to St. Louis is normally in July.

Reasons to book your flight from London to St. Louis with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from London to St. Louis across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to St. Louis right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Your quick guide to flights from London to St. Louis

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*Available to Expedia members.