Question : What are the chances this flight will be delayed?
Answer : The Dulles to London route has been excellent at getting passengers to their destination on time, with a 100% on-time rate.
Question : How does Dulles to London stack up against the rest of the world in overall promptness?
Answer : The best measurement of overall promptness combines both on-time percentage and total delay minutes. IAD to LTN currently has 4 stars out of 5, earning it one of the best performances in the world. You can fly worry-free on this route.
Question : How many days should you spend in London?
Answer : Passengers from IAD to LTN stay nine days on average.