A new record! Total accrued flight delays of 18 hours within a single 4-day business trip!
First the baggage handlers broke the door seal on the plane in Frankfurt, requiring us to deplane, change aircraft, leave for Denver 8 hours late, miss the last flight to Vegas and finally arrive 15 hours after our original ETA.
On the way home the valve that balances the fuel between both wings stuck (fortunately just before takeoff). We sat on the plane for 3 hours while someone hit it with a hammer before we were able to start the 11 hour flight.