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IAD (Washington) to LHR (London) Flights $679.13

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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.





Interesting Facts About Flights from Washington to London (IAD to LHR)

Question : What day in the next four weeks has the best fares?
Answer : As of Jul 17th, the best day for deals to London (LHR) is Aug 7th. It costs $610, which is 44% below the average price to book the same route.

Question : Do travelers from Dulles typically stay in London for very long?
Answer : Over the next two months, travelers from IAD to LHR are planning on staying for about two weeks on average.

Question : Best case scenario, how quickly can someone get from IAD to LHR?
Answer : British Airways currently holds the quickest travel time with seven hours and five minutes. So, you would arrive in London at 10:35 AM BST if you left Dulles at 10:30 PM EDT. Remember, there is a five-hour time difference.

Question : What is the cheapest round-trip ticket you can get to London?
Answer : Delta Air Lines is the leader in keeping prices down for their passengers over the next three months. Fares are being booked at just $485 and, when compared to the more expensive bookings of $7,844, it's quite a deal.

Question : How many departure times from Washington Dulles International Airport (IAD) to London Heathrow Airport (LHR) are there on a daily basis?
Answer : Each day is different, but on average, you can expect to see six available departure times. You’ll have more choices on this route than most others departing the United States.

Question : Will you do what it takes to get the absolute lowest-cost flight?
Answer : The best day to fly on a budget this month is Tuesday. Having flexibility in your travel plans means you can save more, so be sure to plan ahead when possible.

Question : How long will the flight typically be from Washington Dulles International Airport (IAD) to London Heathrow Airport (LHR)?
Answer : The average flight duration between IAD and LHR is seven hours and 11 minutes.