the st. gregory hotel4 out of 5 downtown washington d.c. save 100% on your flight price was $1,543, price is now $1,166 per person $1,166 per person oct 4 - oct 11 found 17 hours ago roundtrip flight included boston (bos) to washington (was) stay at this 4-star eco-certified hotel in washington. enjoy breakfast (surcharge), room service, and a 24-hour fitness center. our guests praise the restaurant and the helpful staff in our reviews. popular attractions white house and capital one arena are located nearby. great location. housekeeping was not great. each day the room was cleaned in the late afternoon only after requesting service at the front desk. reviewed on aug 25, 2025