Cheap flights from Dallas to London from $400

The cheapest month to fly to London from Dallas is in August. Flight prices, which tend to average around $131, are often lower during this time because this is during the off-season. The month of April is another great option to travel to London, with average flight prices from Dallas averaging around $429.

The cheapest day to depart from Dallas to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $1,149. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,357. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

Flying to London from Dallas in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $1,221 when looking at flights departing in the afternoon. Flights to London are more costly in the evening, with an average ticket price of $1,261. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to London from Dallas when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $1,030 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Dallas for as low as $948 on momondo.

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

Delta, United Airlines, and Virgin Atlantic are the most popular carriers operating from Dallas to London

British Airways, American Airlines and Iberia are the top three most popular airlines that fly to London from Dallas according to our data. British Airways is the first choice among our users, with 44% of people opting to fly with this airline when traveling to London. Keep in mind that there are 12 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Historically, on average around 25% 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 162 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 24% of their flights experiencing any sort of delay.

The number of flights available between Dallas and London is 28 per day as of June 2026. The most frequent departure time is 11:00PM, with 60% of daily flights leaving in the evening.

As of June 2026, there are 196 flights per week flying from Dallas to London. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.