Vuelos de United de St. Louis (STL) a Londres (LHR) desde $548

For information on any current Heathrow Airport (LHR) travel advice and quarantine requirements, visit our Covid-19 Travel Advisor. Look before you arrange your flight, so you don’t get caught up en route.

Check your ticket to find out which St. Louis Lambert International Airport terminal you’ll be departing from on your way to London Heathrow with United Airlines. If you can’t locate the information on there, get in touch with your airline.

United Airlines doesn’t provide direct flights between Lambert Field and Heathrow Airport (LHR), so plan on making a stopover. If you’ve got enough time between flights, browse the airport shops while you wait for your connection.

Bring that novel you’ve been looking forward to reading. A flight from Lambert Field to Heathrow Airport with United Airlines takes about 9 hours and 52 minutes. It’ll be enough time to get lost in the gripping storyline.

You’ll have plenty of flexibility if you’re considering flying with United Airlines from STL to LHR. Currently, it has at least 4 flights per day.

For more info about changing your flight to London Heathrow, please visit our Customer Service Portal.

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.