Is a 1¾ hr layover in Washington long enough?
Yes, 1 hour 45 min is probably enough for a layover at IAD (Washington).
Is 1 hour 45 min enough for a layover at Washington Dulles International (IAD)?
Covers the international-domestic MCT with margin, accounting for immigration and customs recheck.
What is the minimum connection time at IAD?
Minimum connection times at Washington Dulles International: Domestic-to-Domestic is 45 minutes, International-to-International is 75 minutes. These are the shortest layovers airlines will sell.
Can I make a 1 hour 45 min connection at IAD on an international flight?
1 hour 45 min clears the 75-minute international minimum connection time at Washington Dulles International, but you should still head directly to your gate. The AeroTrain is an airside underground train that connects the Main Terminal to Concourses A/B and C/D in about 5-8 minutes per leg, with no security re-screening required for onward transfers. Concourse Z, used for regional and some international flights, is only reachable by shuttle bus or mobile lounge from the Main Terminal, adding significant time; international arrivals must first clear immigration and customs at the Main Terminal before recheck, which is the single biggest time sink for connections.
How much time do I need for a layover at IAD?
We recommend at least 55 minutes for a comfortable connection at Washington Dulles International. This gives you enough buffer for security (typically 20 minutes) and transit between terminals (up to 35 minutes).
What happens if I miss my connection at IAD?
United passengers who miss a connection should head to one of the Customer Service desks in Concourse B or C, or use the United app to self-rebook onto the next available flight, as IAD's hub status means frequent onward United departures.