Question 1

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

Accepted Answer

Our cheapest airline available from London to St. Louis is Scandinavian Airlines. Our recent data shows that you can find tickets from as low as £637 on this airline. Additional options worth looking into are Lufthansa and United Airlines, starting at £655 and £659 round-trip. These flights start at 9% lower than the current average price 3 months from now.

Question 2

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

Accepted Answer

To fly one-way, consider booking your trip with Aer Lingus, which is currently one of the cheapest options available, starting at £704. Finnair flights start at £714 while deals on Virgin Atlantic start at £919 one-way.

Question 3

How far ahead should I book a flight from London to St. Louis?

Accepted Answer

To ensure you get the cheapest price possible for a flight from London to St. Louis, you should look to book at least 13 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Question 4

What is the cheapest month to book a flight from London to St. Louis?

Accepted Answer

Currently, February is the cheapest month in which you can book a flight from London to St. Louis (average of £722). Flying from London to St. Louis in December is currently the most expensive (average of £1,033). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 5

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

Accepted Answer

Travellers seeking maximum savings on their London to St. Louis flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

Question 6

E

Accepted Answer

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 inches per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

Question 7

E

Accepted Answer

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

Question 8

What are the most popular routes from London to St. Louis?

Accepted Answer

When deciding which route to take from London to St. Louis consider London Heathrow - Lambert-St Louis, London Gatwick - Lambert-St Louis or London City - Lambert-St Louis as they are the most popular.

Question 9

What are the most popular airlines that fly from London to St. Louis?

Accepted Answer

American Airlines, Air Canada and Finnair are the most popular airlines when flying from London to St. Louis.

Question 10

Where are the most common stopover locations when flying from London to St. Louis?

Accepted Answer

The most popular stopover on flights from London to St. Louis is Chicago.

Question 11

Where are the least popular stopover locations for London to St. Louis flights?

Accepted Answer

London to St. Louis flights have a stopover in Philadelphia the least frequently.

Question 12

What are some popular things to do or see while on a stopover in Chicago?

Accepted Answer

Grant Park, Magnificent Mile, and North Pier Apartments are currently the most popular points of interest in Chicago at the moment. Grant Park, Magnificent Mile, and North Pier Apartments are located about 16.2 mi, 15.5 mi, and 16.1 mi, respectively from Chicago O'Hare Intl. Travellers in need of a car in Chicago can hire one for about £37 per day.

Question 13

What is the cheapest day to fly round-trip from London to St. Louis?

Accepted Answer

Tuesday is generally a great day to depart. Flying on this day could help you save up to 19%.

Question 14

How far in advance should I book a flight from London to St. Louis?

Accepted Answer

Users have found that booking a flight from London to St. Louis at least 14 days early can save you up to 61% on average compared to booking a flight this week. If booking 14 days before your flight isn’t an option for you, users have found flights from London to St. Louis for as little as £516 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as £1,069 for flights departing within the next 3 days.

Question 15

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

Accepted Answer

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, March can be a great choice for travel to St. Louis. Flights to St. Louis from London in March are about £704 on average during March, but can be found for as low as £483.

Question 16

What is the cheapest time of day to fly from LON to STL?

Accepted Answer

It’s typically best to fly out from London to St. Louis in the evening. Doing so could potentially save you 16% on the flight price compared to flying in the morning, which is usually more expensive.

Question 17

What airport do you fly into for flights to St. Louis from London?

Accepted Answer

Lambert-St Louis (STL) is the airport you will fly into if you book a flight from London to St. Louis. You should not have trouble finding flights to Lambert-St Louis from London; the airport handles an average of 0 inbound flights from London per day. You should also have plenty of airline options to choose from since 9 airlines have flights to the St. Louis airport from London. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.

Question 18

Can I find deals for flights from London to St. Louis that include hotel bookings?

Accepted Answer

Yes. In addition to deals on London to St. Louis flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 19

How can I find direct flights from London to St. Louis?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to St. Louis.

Question 20

Can I find deals for business class flights from London to St. Louis?

Accepted Answer

Yes. Cheapflights offers flight deals from London to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 21

How does Cheapflights help users find flights from London to St. Louis?

Accepted Answer

Cheapflights helps you search for flights from London to St. Louis via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Question 22

Why should you use Cheapflights to find cheap flight tickets from London to St. Louis?

Accepted Answer

Millions of users choose and trust Cheapflights to book the best flight deals from London to St. Louis for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Question 23

Can Cheapflights find flights from London to St. Louis with no change fees?

Accepted Answer

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to St. Louis flexibly with Cheapflights today.

Question 24

Can Cheapflights notify me if prices for flights from London to St. Louis become cheaper?

Accepted Answer

Not ready to book yet? You can track prices for flights from London to St. Louis on Cheapflights with our Price Alert feature and get notified when better prices are available.

Round-trip from	£613
One-way from	£300
Popular in	December
Cheapest in	March
Average price	£680

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest£197	Average£756	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Finnair	Cheapest£504	Average£637	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Iberia	Cheapest£618	Average£711	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£626	Average£796	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£627	Average£834	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
United Airlines	Cheapest£633	Average£837	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Lufthansa	Cheapest£668	Average£780	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
KLM	Cheapest£710	Average£831	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Air Canada	Cheapest£715	Average£849	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Cheap flights from London to St. Louis from £300

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 25/6. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London to Lambert-St Louis are usually found in March or January, booked 80 days in advance, depart on a Wednesday or Monday and return on a Wednesday

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Cheapest flights from London to St. LouisExplore the most affordable flight options available from London to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.

Explore the most affordable flight options available from London to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.

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Use the filters below to find and compare flights from London to St. Louis that are best for you.

Best time to book a flight from London to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from London with our price prediction graph.

Cheapflights Insights

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

How far ahead should I book a flight from London to St. Louis?

Use this chart to determine the optimal time to book a return flight from London to St. Louis. Price data was last updated on 9 June 2025.

What is the cheapest month to book a flight from London to St. Louis?

What is the cheapest time of day to fly from LON to STL?

Find hourly flight availability from London to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 June 2025.

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

Use this chart to determine the cheapest time to fly return from London to St. Louis. Price data was last updated on 30 June 2024.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

Reviews of airlines servicing St. Louis

Get a feel of what it's like to fly with Delta, KLM and Finnair from London to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from London to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to St. Louis from London?

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

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

What are the most popular routes from London to St. Louis?

Where are the most common stopover locations when flying from London to St. Louis?

What are some popular things to do or see while on a stopover in Chicago?

Where are the least popular stopover locations for London to St. Louis flights?

Can I find deals for flights from London to St. Louis that include hotel bookings?

How can I find direct flights from London to St. Louis?

Can I find deals for business class flights from London to St. Louis?

What is the cheapest month to book a flight from London to St. Louis?

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Fly from London to St. Louis on these airlines

Choose from the following airlines for your flight from London to St. Louis. Flights are based on user searches made on Cheapflights and were last updated on 13 June 2025.

Top 9 airlines flying from London to St. Louis

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Can Cheapflights find flights from London to St. Louis with no change fees?

Can Cheapflights notify me if prices for flights from London to St. Louis become cheaper?

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Cheapest flights from London to St. Louis
Explore the most affordable flight options available from London to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.