Cheap flights from London Heathrow Airport to Washington from $519

The month of January is, on average, the cheapest month to fly to State of Washington from London Heathrow Airport, with most prices found around $641. If you aren’t able to travel to State of Washington during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $671.

The cheapest day to depart from London Heathrow Airport to State of Washington is on a Wednesday. Travelers who choose to depart for State of Washington on a Wednesday will often find tickets for as low as $771. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to State of Washington for around $893.

The cheapest time of day to fly to State of Washington is at noon when flights can be purchased for as low as $672. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $877 on average. Flights to State of Washington from London Heathrow Airport in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from London Heathrow to Seattle/Tacoma Intl for the best London Heathrow - Washington flight prices

You are more likely to see cheaper flights to State of Washington from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $783 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from London Heathrow Airport for as low as $737 on momondo.

There are 3 cabin classes available to choose from on London Heathrow Airport to State of Washington flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Alaska Airlines, KLM, and Delta are the most popular carriers operating from London Heathrow to Washington

British Airways, Delta and Virgin Atlantic are the top three most popular airlines that fly to State of Washington from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 30% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 6 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.

As of October 2026, 3 flights take off from London Heathrow Airport and land in State of Washington each day. The most common flight departure time for this route is 5:00PM, with 54% of daily flights taking off in the afternoon.

The number of flights available between London Heathrow Airport and State of Washington is 25 per week as of October 2026. The most frequent departure day is Fri, with 52% of weekly flights leaving on this day.