Hi,

I would probably choose , all other things being equal the later flight as it gives you more chance of an early check in.. I prefer the CS to CW . I would also keep checking for F availability as it can move

That being said, I have done the 0900 or so flight twice recently ( 0900 on BA to HND in December then the 0950 JL flight to HND in Jan -with a connection to Hiroshima at 1400

There is the observation deck on top of T3 landside then the Haneda airport garden with shops and onsens.

If it is a nice day there are two beautiful gardens close to the Conrad so if the room is not ready then i have left my bags and gone exploring. Conrad is also close to Ginza

I personally preferred the 1900 JL flight ( slept for 7 hrs straight) but on the morning flights ( I woke up early, then by the time you take off, have a leisurely lunch, watch a movie then it was getting dark outside ( easier in winter) so put the seat down ( change into a set of F pj's i bring along) and try to get as much rest as possible ( getting an occasional soft drink from the galley then waking up in time for breakfast). You do feel a little tired but I get a certain buzz from being in Tokyo and as long as I keep moving ( sunshine/fresh air helps) I am reasonably ok till bedtime ( I do try to get to bed around 2230-1100 on my first night with nothing major planned in the evening)

Regards

TBS