£321 Cheap flights to St. Louis
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to St. Louis departing on 3/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from the United Kingdom to St. Louis
Cheap return flights
Cheap one-way flights
Cheap last-minute flights
See travel insights to St. Louis from
St. Louis flights insights and trends
Explore insights for your St. Louis flight to craft the best travel plan
What is the cheapest month to fly to St. Louis?
The month of March is, on average, the cheapest month to fly to St. Louis from United Kingdom, with most prices found around £562. If you’re not able to fly to St. Louis in March, then January is your next best option. Flight prices from United Kingdom to St. Louis during January average around £572.
What is the cheapest day to depart on your flight to St. Louis?
Our data shows that Wednesday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as £614. Flights from United Kingdom to St. Louis on a Sunday will generally be more expensive and average around £730. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to St. Louis?
Our data shows that the cheapest United Kingdom to St. Louis flights are usually those with departure times in the evening. Our users have found flights to St. Louis in the evening for as low as £571. In contrast, the most expensive time of day to depart to St. Louis is in the morning when prices are around £672.
How far in advance should I book a flight to St. Louis?
You are more likely to see cheaper flights to St. Louis from United Kingdom when booking 4 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around £706 when searching 4 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from United Kingdom for as low as £624 on momondo.
Cheapest flights to Lambert-St Louis
Find the cheapest flights to Lambert-St Louis from your nearest city or airport
| CHEAPEST MONTH TO FLY TO ST. LOUIS FROM LONDON HEATHROW AIRPORT | February | 13% cheaper | Flying from London Heathrow Airport to St. Louis costs on average just £616 in February |
| MOST EXPENSIVE MONTH TO FLY TO ST. LOUIS FROM LONDON HEATHROW AIRPORT | August | 28% more expensive | It costs about £907 for flights to St. Louis from London Heathrow Airport in August |
| MOST POPULAR MONTH TO FLY TO ST. LOUIS FROM LONDON HEATHROW AIRPORT | July | 450% more users visited | More momondo users searched in flights to St. Louis from London Heathrow Airport in July than any other month |
Cheap St. Louis flight deals and tips
Summary info about St. Louis flight prices, duration and airlines
Best One-Way Price | £321 |
|---|---|
Best Round-Trip Price | £418 |
Fastest flight time | 12h 53m |
Popular in | August |
Frequently asked questions about flying to St. Louis
How far in advance should I book a flight to St. Louis?
Most flyers found that booking tickets 13 days in advance of their planned departure date is the best time to get cheap flights to St. Louis. During this timeframe, flight prices are around £711. Keep in mind that you might also find cheap flights to St. Louis outside of this time window. In fact, momondo users recently found flights from United Kingdom to St. Louis for £521.
Is there an alternative airport near St. Louis?
Springfield Capital Airport can be an alternative airport used for travel to St. Louis.
When did momondo last update prices for flights to Lambert-St Louis Airport?
Prices for flights to Lambert-St Louis Airport are refreshed on a daily basis.
How many operators does momondo search for flights to Lambert-St Louis Airport?
As of April 2025, there are 13 operators available to choose from for flights to Lambert-St Louis Airport.
How old do you have to be to fly to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
Travelling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal to St. Louis?
Finding the right flight to St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. These options can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.
Can I find flights to St. Louis with flexible booking policies on momondo?
Yes. All flights to St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights to St. Louis?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight to St. Louis.
I’m not ready to book a flight to St. Louis right now. Can momondo alert me if prices change?
Yes. momondo can track flight prices for St. Louis and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.
Get notified when prices go down
Daily price changes in your inbox - only with Price Alerts.
Find better results for your trip to St. Louis
Popular Flights to St. Louis
Popular routes according to searches in the past day on momondo
Cheapest flight routes to Lambert-St Louis
These routes have the cheapest flights to Lambert-St Louis found by momondo users in United Kingdom
| Departing | Destination | Best Time | Best Price |
|---|---|---|---|
| London | St. Louis | 15h 44m | £469 |
| Edinburgh | St. Louis | 16h 40m | £674 |
| Glasgow | St. Louis | 14h 16m | £704 |
| Manchester | St. Louis | 15h 24m | £745 |
| Newcastle upon Tyne | St. Louis | 14h 36m | £841 |
| Grimsby | St. Louis | 15h 48m | £904 |
| Leeds | St. Louis | 19h 07m | £1,050 |
| Liverpool | St. Louis | 31h 23m | £1,062 |
| Birmingham | St. Louis | 13h 35m | £1,134 |