- The United Airlines Washington DC Office offers trustworthy, cost-effective business travel choices for employees on the go. We handle everything, from last-minute changes and corporate reservations to upgrade requests and travel alerts. Our crew knows how quickly business moves, so they work quickly to keep you on schedule. Whether you are going locally or abroad, we are here to make sure your trip is smooth and effective. Trust the DC office for informed support backed by United's global presence so you can focus on your goals while we take care of the travel.