Time Zones and Flight Times

OK, after looking at some time zone maps and some really odd math (I really don't like math that has to do with hours, minutes, or any other type of time) I think I have an idea of how long our flights are going to be. Springfield is GMT/UTS -6, Seoul is GMT/UTS +9 & Hanoi is GMT/UTS +7. This means that if it is 12pm on Saturday here, then it is 3pm on Sunday in Seoul and 1pm on Sunday in Hanoi. Since all times on our schedule are in local time, Seth and I were confused as to how long we would actually be in flight.

So here it is (I think). . .

St. Louis to Chicago: 1 hour
Chicago layover: 3 hours
Chicago to Seoul: 14 hours
Seoul layover: 3 hours
Seoul to Hanoi: 5 hours

Total travel time: 26 hours
Total time in flight: 20 hours

Return trip:

Hanoi to Seoul: 5 hours
Seoul layover: 6 hours 10 min
Seoul to Chicago: 14 hours
Chicago layover: 2 hours 35 min
Chicago to St. Louis: 1 hour

Total travel time: 28 hours 45 min
Total flight time: 20 hours
All that WITH a BABY!!!