I'm bringing my 7 year old to PHL and DCA next week. (He's asked to learn more about the Ben Franklin and the presidents.) Previously when I've flown DCA-ORD, I've gotten a great view of the monuments, etc. I'd really like my boy to see this if possible. Does anyone fly DCA-ORD enough to recommend which side of the plane we should sit on for the best view?

Our inbound flight is to PHL, so I just need advice on just DCA-ORD