Cheap flights from Atlanta to London from $420

The cheapest month to fly to London from Atlanta is in February. Flight prices, which tend to average around $369, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from Atlanta averaging around $446.

The cheapest day to depart from Atlanta to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $799. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $986. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

Flying to London from Atlanta in the evening is the least expensive time of day to depart. momondo users have found prices as low as $866 when looking at flights departing in the evening. Flights to London are more costly in the afternoon, with an average ticket price of $982. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Atlanta Hartsfield-Jackson to London Heathrow for the best Atlanta Hartsfield-Jackson - London flight prices

You are more likely to see cheaper flights to London from Atlanta when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $906 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Atlanta for as low as $816 on momondo.

There are 4 cabin classes available to choose from on Atlanta to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 1% on your flight if you consider stops on a Atlanta to London flight.

As of May 2026, prices for Atlanta to London flights are approximately 5% more expensive when compared to flights at the same time last year.

Virgin Atlantic, JetBlue, and KLM are the most popular carriers operating from Atlanta Hartsfield-Jackson to London

Delta, British Airways and Virgin Atlantic are the top three most popular airlines that fly to London from Atlanta according to our data. Delta is the first choice among our users, with 45% of people opting to fly with this airline when traveling to London. Keep in mind that there are 14 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Historically, on average around 15% of flights between Atlanta and London have experienced a delay on any given week. The average delay length over the past 12 months has been 134 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, Virgin Atlantic have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

Copenhagen (CPH) was the most common stop: 34% of momondo users choosing 1-stop flights on this route connected there.

Flights via New York (JFK) offer the lowest average round-trip price of $203.

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 11h 35m.

Frankfurt am Main (FRA) has the shortest average layover time for this route: 1h 34m.

The number of flights available between Atlanta and London is 23 per day as of May 2026. The most frequent departure time is 5:00PM, with 78% of daily flights leaving in the evening.

The number of flights available between Atlanta and London is 163 per week as of May 2026. The most frequent departure day is Sat, with 15% of weekly flights leaving on this day.