Cheap flights from Miami to London from $431

The month of September is, on average, the cheapest month to fly to London Heathrow Airport from Miami, with most prices found around $603. If you’re not able to fly to London Heathrow Airport in September, then August is your next best option. Flight prices from Miami to London Heathrow Airport during August average around $638.

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 $729. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $923.

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 Miami to London Heathrow Airport in the evening for as low as $763. 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 $810.

Fly from Miami to London Heathrow for the best Miami - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from Miami when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $765 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 Miami for as low as $678 on momondo.

There are 4 cabin classes available to choose from on Miami to London Heathrow 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 24% on your flight if you consider stops on a Miami to London Heathrow Airport flight.

As of April 2026, prices for Miami to London Heathrow Airport flights are approximately 14% more expensive when compared to flights at the same time last year.

TAP AIR PORTUGAL, KLM, and Delta are the most popular carriers operating from Miami to London Heathrow

British Airways, American Airlines and Virgin Atlantic are the top three most popular airlines that fly to London Heathrow Airport from Miami according to our data. British Airways is the first choice among our users, with 46% 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 14% of flights between Miami and London have experienced a delay on any given week. The average delay length over the past 12 months has been 147 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights at night 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. Monday 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 8% of their flights experiencing any sort of delay.

Lisbon (LIS) was the most common stop: 60% of momondo users choosing 1-stop flights on this route connected there.

Flights via Dublin (DUB) offer the lowest average round-trip price of $718.

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 11h 20m.

Dublin (DUB) has the shortest average layover time for this route: 1h 25m.

As of April 2026, there are 28 flights per day flying from Miami to London Heathrow Airport. The most common time of day flights depart is 10:00PM, with 81% of flights taking off in the evening.

As of April 2026, there are 201 flights per week flying from Miami to London Heathrow Airport. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.