Originally Posted by
skeets50
Is Dulles like Atlanta and others that allow you to go from terminal to terminal once thru security, or do you have to exit and then go through security again if you are Changing planes / airlines at Dulles?
Yes all terminals are connected airside. The only time you have to reclear is if you are arriving on an international flight
This means you can access the TK/BA/AF/LH lounges even if flying in/out of C and D on United