Cheap flights from St. Louis to the United Kingdom from £275
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to the United Kingdom departing on 21/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
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 St. Louis to the United Kingdom
Cheap return flights
Cheap one-way flights
Cheap last-minute flights
Air Canada flights from St. Louis to United Kingdom
Our best Air Canada deals on St. Louis to United Kingdom flight tickets
Scandinavian Airlines flights from St. Louis to United Kingdom
Our best Scandinavian Airlines deals on St. Louis to United Kingdom flight tickets
See travel insights to the United Kingdom from
How to get the cheapest flight ticket from St. Louis to United Kingdom
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 United Kingdom?
The cheapest month to fly to United Kingdom from St. Louis is in April. Flight prices, which tend to average around £599, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of April, then departing from St. Louis during the month November is also very affordable. Most momondo users find prices during this month for around £623.
What is the cheapest day to depart on your flight to United Kingdom?
The cheapest day to depart from St. Louis to United Kingdom is on a Wednesday. Travellers who choose to depart for United Kingdom on a Wednesday will often find tickets for as low as £609. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to United Kingdom for around £1,004.
What is the cheapest time of day to depart on your flight to United Kingdom?
The cheapest time of day to fly to United Kingdom is in the morning when flights can be purchased for as low as £645. Try not to purchase tickets in the evening because they tend to be around £1,155. Of course, these prices can vary depending on the time of year and what airport you fly to.
How far in advance should I book a flight to United Kingdom?
You are more likely to see cheaper flights to United Kingdom from St. Louis when booking 9 weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around £753 when searching 9 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from St. Louis for as low as £630 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to United Kingdom?
WestJet, United Airlines, and Air Canada are the most popular carriers operating from Lambert-St Louis to United Kingdom
Which airlines fly to United Kingdom?
Virgin Atlantic, British Airways and KLM are the top three most popular airlines that fly to United Kingdom from St. Louis according to our data. Virgin Atlantic is the first choice among our users, with 48% of people opting to fly with this airline when travelling to United Kingdom. Keep in mind that there are 5 different airlines that fly to United Kingdom on a routine basis, so you have a few additional options to choose from.
Cheap St. Louis to United Kingdom flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to United Kingdom
When did momondo last update prices for flights from Lambert-St Louis Airport to United Kingdom?
Prices for flights from Lambert-St Louis Airport to United Kingdom are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to United Kingdom?
The number of operators available for flights from Lambert-St Louis Airport to United Kingdom is 5 as of February 2025.
How old do you have to be to fly from Lambert-St Louis Airport to United Kingdom?
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 Lambert-St Louis Airport to United Kingdom.
What documentation or ID do you need to fly to United Kingdom?
The travel and health documents required for your trip to United Kingdom 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 United Kingdom. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
Best airlines flying from St. Louis to United Kingdom
Compare and see reviews for airlines that fly from St. Louis to United Kingdom with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £497 | Free Cancellation | Rating 7.5 654 reviews | |||
| PriceFrom £540 | Free Cancellation | Rating 7.4 8,765 reviews | |||
| PriceFrom £547 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom £564 | Free Cancellation | Rating 7.8 1,333 reviews | |||
| PriceFrom £605 | Free Cancellation | Rating 6.6 6,762 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to United Kingdom?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to United Kingdom for you.
Can I find flights from St. Louis to United Kingdom with flexible booking policies on momondo?
All flight searches from St. Louis to United Kingdom on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from St. Louis to United Kingdom?
Once all potential St. Louis to United Kingdom flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from St. Louis to United Kingdom right now. Can momondo alert me if prices change?
If you are simply researching potential flights to United Kingdom, momondo offers a useful price alert feature which will track prices for flights to United Kingdom from St. Louis and alert you when they change.