Some photos straight from my backyard with the Canon 100-400L on a 6D, 100% crops.
I bought this excellent lens last week and I can picture planes in full cruise flight now .....
I thought that the EK A380 had a different livery with the dark stripes on the front, but it is probably the shadow of the port wing....
KE910 CDG-ICN HL7614, FL350 flying low in the Northwest, silhouette of A380 against evening twilight
EK32 LHR-DXB A6-EDL FL370
EK32 LHR-DXB A6-EDL FL370 about 30 seconds later