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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.

London

$372.59

$566.49

$730.62

$765.11

Southend-on-Sea

$1,882.74

Cheap IAD to LHR Flights

Question : How much should a trip from Dulles (IAD) to London (LHR) cost?
Answer : Flight prices change a lot more than most routes from the United States for IAD to LHR. They range anywhere from $414 to $9,380. However, the sooner you book, the more you'll be able to save.

Question : On a daily basis, how many different flight times are available from Washington Dulles International Airport (IAD) to London Heathrow Airport (LHR)?
Answer : Each day is different, but on average, you can expect to see nine available departure times. That is the same number of choices as the average route departing the United States.

Question : What are the chances this flight will be delayed?
Answer : This particular route gets passengers to London Heathrow Airport on time 76% of the time, which puts it in the top half of the world. If a flight is delayed, though, expect an average of 35 minutes added to your flight time.

Question : How does Dulles to London stack up against the rest of the world in overall promptness?
Answer : Using the combined on-time percentage and average delay breakdown, Dulles to London currently has a 3 out of a possible 5 star rating. A 3-star rating means you should feel slightly worried about getting to London on time.

Question : What's the expected flight time for IAD to LHR?
Answer : When flying from IAD to LHR, it will take seven hours and 11 minutes on average.

Question : Which airline has been the most dependable in getting passengers to their destination on time?
Answer : The current leader is Virgin Atlantic with an 84% on-time rate. Don't spend more time waiting in an airport than you have to and stick with Virgin Atlantic on this route. If they are delayed for some reason though, the average delay is 44 minutes.

Question : If speed is all that matters, how can you get from IAD to LHR as quickly as possible?
Answer : If you're able to take the quickest direct flight (which is offered by British Airways), you will be able to leave IAD at 10:30 PM EST and get to LHR at 10:35 AM GMT (seven hours and five minutes). Remember, there is a time change of five hours.

Washington to London Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from Washington to London will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring London.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at Expedia.com, we’ll pair you up with IAD to LHR flights that won’t make your bank account wince. Ready to temporarily leave behind Washington for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to LHR with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.