I stupidly bought a reward ticket from LIS-IAD-DCA-CLE. I just realized I need to get from Dulles to National Airport. I assume this is my responsibility and that I will need to lug my bag after leaving customs and re-check it at DCA. Is this assumption correct?

Also, what would be the best way to get from IAD to DCA? I would prefer not to use a taxi and the shared ride vans seem to require more time than I have. What would Uber or a taxi cost? Is public transportation (Bus to Metro) easy enough to do? What would be the best route?

I am scheduled to arrive at IAD at 3:35 p.m. on Monday, June 6 and depart DCA at 8:00 p.m. Do I have enough time to use public transportation? I will be in BusinessFirst and have Global Entry (never used it at IAD) so that might speed things up a bit. Any suggestions would be welcome. Thanks.