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Cheap IAD to LHR Flights

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Washington to London route information

Origin Airport Washington Dulles Intl.
Destination Airport Heathrow
Airlines Serving Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Royal Air Maroc, SAS, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Flight Price $447
Distance 3,666 mi

London

$486.03

$503.85

$553.00

$4,545.52

Cheap IAD to LHR Flights

  • Question : How long do most people visit London?
    Answer : Of course, you're not most people, but if you were, you'd stay roughly 13 days.
  • Question : How long is the flight from IAD to LHR?
    Answer : This direct flight will whoosh you away to your destination in seven hours and five minutes via British Airways. If you catch the 10:30 PM EDT departure, you'll arrive at 10:35 AM BST. You'll have plenty of time to freshen up or grab a quick lunch before your next appointment (remember, there is a time change of five hours).
  • Question : How many flights are there per day from Dulles to London?
    Answer : The number does differ by the day, but on average, you can expect nine different choices of flight times when you book. You'll have the same number of choices on this route as most others departing the United States.
  • Question : How much is a plane ticket to London (LHR) from Dulles (IAD)?
    Answer : They can vary anywhere from $414 to $17,344. Booking far in advance can usually help you get the cheapest rate. The further out you book, the more likely you are to save.
  • Question : What is the cheapest day to fly?
    Answer : The cheapest day to fly from Dulles to London is on Saturday. So, if you are trying to save a little money on your next vacation look for flights on Saturday.
  • Question : Can I change the date of my flight?
    Answer : Yes, you can switch your departure date. If you wish to save a little money in doing so, the cheapest day to fly in June is Saturday. You may be thinking you're missing out leaving a day earlier, but we think of it as you just adding those savings towards a future getaway. A penny saved is a vacation earned.
  • Question : What is the cheapest day to fly to London?
    Answer : If you are needing to save funds, look at May 22nd. As of May 20th, it's showing the cheapest ticket at $414. That is 64% below the average price for this route, so you can spend that extra cash on having an amazing time London.