Two flights arriving about the same time from NY. One passenger to T1 and the other T3. Any suggestions?
Where are you heading to after you meet up and what mode of transit? Simplest option is in baggage claim in either terminal. There’s plenty of seating. I assume both of you have cell phones.
Neither will have checked bags, and we will probably get a taxi or Uber
Taxis load outside baggage claim on the lower level. Uber loads on the upper level.
Whoever arrives first should head to the other person’s terminal.
Taxis depart from the lower level just beyond baggage claim where, as Dave mentioned, there's seating. Ubers leave from the upper level where seating is scarce. I'd choose to meet at baggage claim, even if you later decide to go upstairs for an uber.
Why go down to baggage claim? Meet in T2 on the upper (ticketing) level. Uber will be parked between either T1 and T2, or T2 and T3. All doors to the outside have numbers, though they won't correspond exactly to what Uber texts.
You may want to stay behind security if one of you is running late. There's a place to relax and eat in the rotunda between T2 and T3 that's usually not busy.
If neither of you is checking bags you might as well stay inside security and whoever arrives first walk over to the other person's gate. T1. T2, and T3 are all connected inside security.
Wicker Park Sushi in T2 is roughly halfway between T1 and T3 so makes a decent meeting spot if you really arrive at the same time. The rotunda between T2 and T3 mentioned in post 5 is another good one.