US military personnel traveling at their own expense on
authorized leave or pass may get signicantly cheaper fares. Discharged
military personnel must complete all travel within 7 days of discharge
date. Valid active duty US green identification card or separation
orders must be presented. USAir has a 50% military discount. 

Also, any military person who is on active duty and either on TDY
(temporary duty), emergency leave or regular leave, or any retired
military person may sign up for space available travel on
pre-scheduled military flights to any air force base (e.g., Hawaii,
Boston, Florida). Active duty personnel have priority over retired
personnel, and space is allocated in order of signup. Few flights,
however, are scheduled more than 24 hours in advance, and you may need
to go to your destination by a very roundabout route, since not every
base has a lot of space-available flights. The cost is free from most
bases, but some tack on a $10 or $20 charge for admin purposes. For
long flights, they will sell you a box-lunch for $2.40. The planes may
not be as comfortable as commercial flights. There are numerous books
on space-available flights that military people can pick up at their
PX/BX.   They should also contact the PAX representative at their
nearest base for more specific information.
   

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