I recently completed my first award flight. We live outside of Wichita, KS and so I had booked a flight from Wichita(ICT)/DFW/Tokyo(NRT)/Hiroshima(HIJ). We all got on the plane in Wichita and started to taxi out. Had an engine that would not start and so we all had to get off and find another flight. What I soon learned is that AA is the only airline that flies from Wichita to Dallas, and they had no other flight that morning that would allow me to make the connecting flight in Dallas. We took a United flight to Chicago to catch another AA flight to Tokyo, but that caused us to miss our connecting flight to Hiroshima. So we spent an unexpected night in Tokyo, at our expense. Lesson Learned: Always have a Plan B to get to your next stop. I should have made the original booking from Wichita to Chicago and then on to Tokyo,because there are other airlines flying to Chicago. Would it be a good idea to have a "Lessons Learned" forum?