United States · Washington
Washington Dulles International Airport (IAD) Online Check-in
Washington's main international airport, United Airlines hub. Single connected terminal with mobile lounges + AeroTrain to satellite concourses.
Now at Washington Dulles International Airport
- Security wait (today, avg) 18 min
- Disruption No reported disruption
- Weather impact Clear, 14 °C
Quick information
Airlines we cover at Washington Dulles International Airport
Washington Dulles International Airport hosts about 35 airlines in total. We have terminal-specific check-in pages for the 1 listed below. Pick yours to see counters, bag-drop, and online check-in details.
How to check in for a flight from Washington Dulles International Airport
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Check in online before you leave home
Most airlines open online check-in 24–48 hours before departure. It saves time at the airport and avoids airport-counter fees on low-cost carriers.
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Arrive at the right terminal
IAD has 1 terminal(s). Check your airline's terminal in the table above before you set off.
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Drop off checked baggage
Counters typically open 2 hours before departure and close 40 minutes before. Use self-service bag-drop kiosks to save time.
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Pass security
Liquids must be in a single transparent bag, max 100 ml each. Laptops and large electronics out of bags. Submit your security wait time below to help others.
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Reach your gate on time
Most airlines close the gate 20 minutes before departure. Allow 5–15 minutes to walk from security to the gate.
Tips for Washington Dulles International Airport
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Silver Line metro now connects IAD
Silver Line metro extension to IAD opened 2022. Direct from terminal to downtown DC in 55 min for $6.
Popular destinations from Washington Dulles International Airport
Frequently asked questions
Which terminal does United Airlines use at IAD?
United uses the Main Terminal — primary hub. Departures from concourses C and D via AeroTrain shuttle.
Official sources
The check-in details on this page are sourced from each airline's website. For terminal layout, opening hours, and ground-side services, see the Washington Dulles International Airport official site below.
- Wikipedia: Washington Dulles International Airport — Editorial overview, history, statistics.
- FlightRadar24: IAD live data — Live flight arrivals, departures, and delays.
- travel.state.gov — Up-to-date entry requirements and security guidance for United States.