Thanks. Not sure what card this was charged on. Undoubtedly they don't have tip insurance.
AA has them with a backup reservation on a later flight out of ORD so they can get either the flight they are listed on (which they would in the likely event that it too will be delayed) or the next one. Not sure which cards provide trip delay coverage (Amex Plat, Chase Sapphire Reserve and the like?). Are there non-premium cards with that kind of coverage? She's 24 and a nurse practitioner so not likely to get a card without $500 annual fee.