Well that will probably put you into dulles just before noon.

Couple things to think about: the fuel at Signature and Landmark is going to be outragous. Probably in the range of $5.00 to $6.00 per galllon for 100LL.... the fuelers there are probably going to have to pull out their manuals to remind them how the 100LL trucks work! .

Im pretty sure they have minimum fuel amounts and I would guess a 172 top off doesnt come anywhere near that amount, which means they will charge you a fee. Plus a landing fee, and ramp fee and handling fee. Its really not a big deal for someone who is flying in a 20 million dollar Gulfstream and spending $3000 in fuel, but for your Cessna, it is going to become expensive very quickly.

And on a side note, there used to be a rule in place where "flight training specific" flights were not allowed to land at Dulles. IF you are picking up for dropping off or have business there, you could fly a Cessna 150 or whatever in there, and put up with the mess. But if it is for flight training reasons, there is a restriction on landing there. I dont know how strict they are with it, but if ATC asks you... I warned you.

Lastly.. ATC. Im not even going to start on that one. Flying into Dulles is a little different that flying into Memphis as mentioned above. Hopefully they dont have a push running and hopefully you guys are on top of your game. So, Good luck to you on that one.

I think you would be better off flying into Leesburg or Manassas ... both airports are just outside of the Dulles surface Class B ring, Manassas is even busy enough for most people!

Either way, good luck. I know Potomac Approach has a short patience for slow moving planes in and out of Dulles. They already have enough work to do... Best of luck.