Yes. The recorded info says it gets to Dulles every half hour, usually at the 15/45 of the hour, and it was true for us. Our driver was super nice, helped with luggage and even went a ways into the hotel to get us a luggage cart.
I believe their shuttle is complementary- gratuity is apropriate
Yup it leaves the hotel every 30 mins.
Yes they every 30m
Runs every 30 minutes
Yes they do
Yes, they have free shuttle from the airport to hotel and vice versa.
Yes.
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