Cheap flights from Atlanta to London from $420

The month of February is, on average, the cheapest month to fly to London Heathrow Airport from Atlanta, with most prices found around $707. If you’re not able to fly to London Heathrow Airport in February, then January is your next best option. Flight prices from Atlanta to London Heathrow Airport during January average around $746.

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $790. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $981.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Atlanta to London Heathrow Airport in the evening for as low as $855. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $975.

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

You are more likely to see cheaper flights to London Heathrow Airport from Atlanta when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $903 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Atlanta for as low as $815 on momondo.

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

WestJet and JetBlue are the most popular carriers operating from Atlanta Hartsfield-Jackson to London Heathrow

Delta, British Airways and Virgin Atlantic are the top three most popular airlines that fly to London Heathrow Airport 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 Heathrow Airport. Keep in mind that there are 14 different airlines that fly to London Heathrow Airport 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: 50% 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 Frankfurt am Main (FRA) have the shortest average one-way travel time: 12h 13m.

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

The number of flights available between Atlanta and London Heathrow Airport 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 Heathrow Airport is 162 per week as of May 2026. The most frequent departure day is Wed, with 15% of weekly flights leaving on this day.