ORD hasn't been in a class drop since May 2022. Lately it has been around 8 to 9 months after hire date before people have been able to hold ORD through vacancy bidding (usually the 3rd vacancy bid). Expect to commute 4 to 5 months on the line before getting it. Sure there are exceptions but this is the case for the majority of people that I know. ORD is very senior and stagnant on the FO side.