Which airport is closest to Arlington National Cemetery?

Reagan International Airport

You can metro from the cemetery to DCA (about 10 minutes) . Otherwise, Dulles would be about a 40ish min drive

If you'd like to fly your OWN plane, as I do, you can land at College Park Airport and then get on the METRO across the street that will take you directly to the Cemetery. This is MUCH better than sitting in auto traffic or trying to get through TSA. Much less expensive, also. There are other smaller, general aviation airports in northern Virginia as well, but they'd require a cab. Anyway you go, it's worth the journey.

Ronald Reagan National is closest. Dulles is also not too far away.

Reagan national airport

DCA - Reagan National