FrequentMiler has an ongoing collection about which things work for RealTime Rewards, which should also translate to which purchases will be coded appropriately for the bonus category. https://frequentmiler.com/us-bank-re...t-works-where/

Airbnb has data points in both directions, so it's not entirely clear what conditions must be satisfied for Airbnb to post a charge that gets the bonus.

As trikotret mentioned the Chase "travel" category is rather broad. Unlike most cards they even include things like Timeshares in their travel category.