Originally Posted by
bambinomartino
Thank you! I did not realize the terminal transfer bus doesn't run until 11:30 (kind of shocking, but I'm sure there is a good reason). It was the morning flight I was eyeing. The evening one works as well, although I'd be losing a half a day of a short trip. I might take the time to get some deep dish pizza.
There is a good reason for why the bus doesn't run until 11:30 AM. All of the Europe departures are in the afternoon or evening, except for the early IST flight which doesn't run daily anyway. The Asia departures are mostly in the morning but All Nippon is from T1 while JAL is from T3 so no transfer bus is needed for those. Korean Air is from T5 but they are part of SkyTeam (Delta) which is in T5.
Going landside from T2 to T5 is no big deal. The train runs about every 4 or 5 minutes, takes at most 5 minutes between the terminals, and T5 security is rarely if ever crowded in the morning.