Flight Heathrow Airport departs from London Heathrow Airport at 06:30 and arrives at Frankfurt Frankfurt Airport at 09:05.
The flighttime is about 1h 35m. The distance travelled ("as the bird flies"): 1014 Km. So the average speed is roughly 640 Km.
There is an 1 hour time difference between London and Frankfurt
The best day to arrive at London is Saturday and it would be best to avoid Monday, as prices are on average 166.17% higher than on Saturday. (Average prices, based on 784641 datapoints.)
We have a lot more statistics for flights LH 921 and between London and Frankfurt.