does ord even have chase banks? i know washington area has 0 chase locations
There are a zillion Chase locations (1,471 ATMs) in Chicago (since they bought Bank One in 2004), but none in ORD or MDW to the best of my knowledge.
Sounds like there are some in IAH. When I flew ORD-IAH-EZE a few years ago I was maxing out my daily withdrawal limit at the Chase ATM in IAH and then getting the $20s turned into $100s for free at the currency exchange counters (they said they do up to $200 per location as a courtesy).