707's did use DCA but they never flew internationally for European flights (to my knowledge there hasn't been a scheduled European flight to/from DCA).

PanAm had a DCA flight with a 707 back in the later 50s/early 60s. Lots of wide-bodies did utilize DCA. As mentioned up-thread, DL had a 767, Eastern did too.

A NW DC-10 made a diversion to DCA (from BWI) during a storm and made an empty flight out the next day.

AND, the 787 has come in and out of DCA when it was first launched - I was at Gravelly Point and expected the 787 to take most of the 7k foot runway to get off the ground but it was up and off with lots of room to spare making its departure with ease (it was empty of course).