Originally Posted by
gateH15
I was at ORD T5 landslide 2 weeks ago and I saw the sign by checkpoint 11 that there is a bus to terminals 1,2,3 from Gate M1. I think it is new and for some reason it’s not advertised. I was able to find info on UA FlyerTalk sub forum but it’s not clear how frequent that bus is etc.
Post 202+ I found thread about reverse T5 to T123 airside transfer.