Cheap flights from the United Kingdom to St. Louis from $355
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to St. Louis departing on 5/21. 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 and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize 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
Recent round-trip flight deals from the United Kingdom to St. Louis
Recent one-way flight deals from the United Kingdom to St. Louis
Recent last minute flight deals from the United Kingdom to St. Louis
Delta flights from United Kingdom to St. Louis
Our best Delta deals on United Kingdom to St. Louis flight tickets
Air France flights from United Kingdom to St. Louis
Our best Air France deals on United Kingdom to St. Louis flight tickets
See travel insights to St. Louis from
How to get the cheapest flight ticket from United Kingdom to St. Louis
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to St. Louis?
In general, March is the cheapest month to fly from United Kingdom to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $739. The month of January is another great option to travel to St. Louis, with average flight prices from United Kingdom averaging around $753.
What is the cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $952. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,371. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from United Kingdom at noon is the least expensive time of day to depart. momondo users have found prices as low as $1,075 when looking at flights departing at noon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $1,229 per ticket.
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 $931 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 $826 on momondo.
What is the cheapest airline that flies from United Kingdom to Lambert-St Louis?
WestJet, Aer Lingus, and British Airways are the most popular carriers operating from United Kingdom to Lambert-St Louis
What airlines fly to St. Louis?
British Airways, American Airlines and United Airlines are the top three most popular airlines that fly to St. Louis from United Kingdom according to our data. British Airways is the first choice among our users, with 39% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 5 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
Cheap United Kingdom to St. Louis flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from United Kingdom to St. Louis
When did momondo last update prices for flights from United Kingdom to Lambert-St Louis Airport?
Prices for flights from United Kingdom to Lambert-St Louis Airport were last updated today.
How many operators does momondo search for flights from United Kingdom to Lambert-St Louis Airport?
There are 5 operators available for flights from United Kingdom to Lambert-St Louis Airport as of May 2025.
How old do you have to be to fly from United Kingdom to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from United Kingdom to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
Best airlines flying from United Kingdom to St. Louis
Compare and see reviews for airlines that fly from United Kingdom to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $278 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $867 | Free Cancellation | Rating 7.4 8,696 reviews | |||
| PriceFrom $925 | Free Cancellation | Rating 6.7 7,045 reviews | |||
| PriceFrom $961 | Free Cancellation | Rating 6.6 6,845 reviews | |||
| PriceFrom $1,146 | Free Cancellation | Rating 7.4 643 reviews |
Traveling 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 from United Kingdom to St. Louis?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to St. Louis from United Kingdom.
Can I find flights from United Kingdom to St. Louis with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for United Kingdom to St. Louis flights to just show those with flexible booking policies.
How can momondo help me find flights from United Kingdom to St. Louis?
momondo provides multiple filters to help you find the best flight to St. Louis from United Kingdom. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from United Kingdom to St. Louis right now. Can momondo alert me if prices change?
If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from United Kingdom and alert you when they change.