Cheap flights from London Heathrow Airport to Dallas from £581

In general, August is the cheapest month to fly from London Heathrow Airport to Dallas. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £119. If you are unable to visit Dallas during the month of August, then departing from London Heathrow Airport during the month March is also very affordable. Most momondo users find prices during this month for around £180.

According to our data, Tuesday is the cheapest day to fly to Dallas from London Heathrow Airport. The lowest ticket price found for a Tuesday departure recently was £785. 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 Heathrow Airport to Dallas on a Sunday will generally be more expensive and average around £851. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

In the morning is the cheapest time of day to fly from London Heathrow Airport to Dallas when you can find flight prices for as low as £793. Flying to Dallas in the morning 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 £858 per ticket.

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

You are more likely to see cheaper flights to Dallas from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Dallas for around £831 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 Heathrow Airport for as low as £739 on momondo.

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

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

British Airways, Finnair and Iberia are the top three most popular airlines that fly to Dallas from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 73% of people opting to fly with this airline when travelling to Dallas. Keep in mind that there are 16 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 147 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights departing in the evening 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.

27 flights are operational daily from London Heathrow Airport to Dallas as of June 2026. The most popular departure time for this route is 08:00, with 59% of flights per day taking off in the afternoon.

The number of flights available between London Heathrow Airport and Dallas is 194 per week as of June 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.