Cheap flights from Dallas to London from $256

The month of September is, on average, the cheapest month to fly to London Heathrow Airport from Dallas, with most prices found around $757. If you’re not able to fly to London Heathrow Airport in September, then October is your next best option. Flight prices from Dallas to London Heathrow Airport during October average around $784.

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 $997. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $1,215.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Dallas to London Heathrow Airport in the afternoon for as low as $1,056. 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 evening are often more expensive with an average ticket price of $1,133.

Fly from Dallas/Fort Worth to London Heathrow for the best Dallas - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from Dallas when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $953 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 Dallas for as low as $790 on momondo.

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

British Airways, Delta, and United Airlines are the most popular carriers operating from Dallas to London Heathrow

British Airways, American Airlines and Iberia are the top three most popular airlines that fly to London Heathrow Airport from Dallas according to our data. British Airways 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 13 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 24% of flights between Dallas and London have experienced a delay on any given week. The average delay length over the past 12 months has been 165 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.

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

According to our data, American Airlines have had the least number of delays on this route over the last 12 months; with about 23% of their flights experiencing any sort of delay.

The number of flights available between Dallas and London Heathrow Airport is 28 per day as of March 2026. The most frequent departure time is 8:00PM, with 59% of daily flights leaving in the evening.

198 flights are operational weekly from Dallas to London Heathrow Airport as of March 2026. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.