Cheap flights from London to Dallas from £340

In general, February is the cheapest month to fly from London to Dallas. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £689. If you are unable to visit Dallas during the month of February, then departing from London during the month September is also very affordable. Most momondo users find prices during this month for around £700.

According to our data, Wednesday is the cheapest day to fly to Dallas from London. The lowest ticket price found for a Wednesday departure recently was £744. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from London to Dallas on a Sunday will generally be more expensive and average around £811. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

At midday is the cheapest time of day to fly from London to Dallas when you can find flight prices for as low as £740. Flying to Dallas at midday is an ideal time because this is during off-peak travel hours. In the afternoon is when there is more demand to fly to Dallas, so prices are often more expensive at around £809 per ticket.

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

You are more likely to see cheaper flights to Dallas from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Dallas for around £802 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Dallas from London for as low as £739 on momondo.

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

Iberia, Delta, and British Airways are the most popular carriers operating from London to Dallas

British Airways, Finnair and Iberia are the top three most popular airlines that fly to Dallas from London according to our data. British Airways is the first choice among our users, with 70% of people opting to fly with this airline when travelling to Dallas. Keep in mind that there are 17 different airlines that fly to Dallas on a routine basis, so you have a few additional options to choose from.

Historically, on average around 12% of flights between London and Dallas have experienced a delay on any given week. The average delay length over the past 12 months has been 149 minutes.

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

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

According to our data, American Airlines have had the fewest delays on this route over the last 12 months, with about 11% of their flights experiencing any sort of delay.

As of March 2026, there are 25 flights per day flying from London to Dallas. The most common time of day flights depart is 08:00, with 53% of flights taking off in the afternoon.

The number of flights available between London and Dallas is 179 per week as of March 2026. The most frequent departure day is Sun, with 16% of weekly flights leaving on this day.