Same travel agency?
Was the Chase card MasterCard or VISA network?
Both transactions were airfare only, flights marketed and operated by UA? (No complications such as codeshares, package tours, etc.)
Yes, same travel agency
Chase Visa.....(on both Hyatt and United Cards over past couple of years)
And yes airfare only....Chase last done in Feb.....the Amex was done beginning of this month.... And it was the same UA flight route (different dates of course): EWR-HKG