Ref the Leeds to Man local flight. The time would vary according to runway in use but somewhere around 15-20 minutes. The max level maybe FL70-90 and speed 220-240kts for a jet.
Using playback on Flightradar24, two flights last Thursday morning took just over 15 minutes - taking off towards the west and landing from the north. EXS801M reached FL54, EXS9611 peaked at FL70.