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How early should I get to IAD?

Washington Dulles International Airport, Dulles, VA · Checked Oct 14, 2026

The short answer

Arrive 2 hours before departure for domestic flights

Arrive 3 hours before international flights

Those are blanket rules. Your real number depends on your terminal, the time of day, traffic from your door, and whether you have PreCheck or a bag. Leave By works out your exact leave time.

Source: flydulles.com

Security lines at IAD

Nationally, TSA checkpoints are busiest from 5 to 7 AM local time. See TSA's hourly numbers and the busiest days to fly.

TSA PreCheck: The main TSA PreCheck checkpoint sits between the East and West checkpoints on the Departures level. Airport pages conflict on PreCheck hours (4:30am-9:00pm in the FAQ; 24 hours on the security page), and an undated banner adds PreCheck at the West checkpoint 6:30-8:00am and 3:30-5:00pm.

CLEAR: Available at this airport (see terminals below for which checkpoints).

Touchless ID: TSA lists Touchless ID at 65 airports and tells travelers to check with their airline. Delta lists IAD as a participating airport (without a dedicated Touchless ID bag drop). A March 2026 third-party list includes United, American, Delta and Alaska among participating airlines at IAD.

Terminals and checkpoints

Main Terminal (Concourses A, B, C, D, Z)

United Airlines, American Airlines, Delta Air Lines, Alaska Airlines, Frontier, Breeze Airways, Sun Country, Lufthansa, British Airways, Air France, Turkish Airlines, Emirates, Qatar Airways, Air Canada

East Security Checkpoint, Departures (Ticketing/Check-In) levelCLEARAirport pages list different hours (4:00am-10:00pm in the FAQ; 4:00am-9:00pm on the security page). CLEAR kiosk for enrolled members at the lower-level East checkpoint.
West Security Checkpoint, Departures (Ticketing/Check-In) levelAirport pages list different hours (3:45am-10:00pm in the FAQ; 4:45am-9:00pm on the security page). An undated banner says PreCheck is also offered here 6:30-8:00am and 3:30-5:00pm.
TSA PreCheck checkpoint (between East and West), Departures levelPreCheckCLEAROvernight, when East and West are closed, screening lanes next to PreCheck stay open; the airport says screening is available 24/7. CLEAR kiosk at the PreCheck entrance.
  • United (ticketing Zone 4) is the hub airline; Delta, Sun Country and Breeze are in Zone 1, American in Zone 2, Alaska and Frontier in Zone 3.
  • After security, the AeroTrain runs from the Terminal station (just past the checkpoints) to the midfield concourses, with less than two minutes between stations; an underground walkway with moving sidewalks also links the Terminal and Concourse B.
  • Mobile Lounges and Plane Mates carry passengers between the Terminal and Concourses A and D.
  • Gate counts: A 24, B 31, C 23, D 31, Z 4.
  • New 14-gate Concourse E for United is scheduled to open in fall 2026 (October target as of September 2026), with direct AeroTrain access.

Between terminals: Single main terminal. After security, the AeroTrain, an underground walkway to Concourse B, and Mobile Lounges connect the terminal to the midfield concourses; leave extra time to reach A, C and D gates.

Terminals are connected after security, so you can walk between them without re-screening.

Getting to IAD

Rideshare and taxi: Pickup is at the 3rd curb on the ground level outside Baggage Claim (Doors 2, 4 or 6), zones 3A-3H assigned in the app. Rideshare drop-off is NOT on the departures level: since Nov. 1, 2023 all rideshare drop-offs are at curbs 3A/B and 3G/H, with a short walk inside to escalators up to ticketing.

Transit: Metrorail Silver Line: the Washington Dulles International Airport station connects to the main terminal's ticketing and baggage claim levels (and Parking Garage 1) by an indoor pedestrian tunnel with moving sidewalks.

Driving and parking: Parking options include a Valet Lot, Garages 1 and 2, Terminal Hourly, Terminal Daily and Economy lots. The airport occasionally closes the Main Terminal arrivals and departures roadways overnight for construction (e.g., 11pm-5am July 23-24, 2026), detouring traffic to the rideshare lanes.

Construction and changes in 2026

  • Concourse E (14 gates, United) is scheduled to open in fall 2026; MWAA's board was told in September 2026 the opening slipped from late September into October. It will be renamed Concourse C later, and design-construction of its next segments began in 2026.
  • Overnight closures of Main Terminal arrivals/departures roadways have occurred for construction (11pm July 23 to 5am July 24, 2026), with pickup/drop-off detoured to rideshare lanes.
  • A roughly $22 billion Dulles overhaul announced July 29, 2026 would replace the Mobile Lounges with an expanded train, a central walking tunnel and new concourses, plus a 32,000-space garage; construction could start in spring 2027.

Checking a bag

Delta (not an exception airport for Delta): domestic bags must be checked at least 45 minutes before departure (30 minutes without bags); bags not accepted more than 6 hours before departure. United's IAD cutoffs were not verified.

IAD tips first-timers miss

  • Budget time after security: most gates are reached by the AeroTrain, a walkway or a Mobile Lounge rather than on foot from the checkpoint.
  • Rideshare drop-off is on the ground-level 3rd curb (3A/B or 3G/H), not the upper departures curb; take the escalators up to ticketing.
  • Screening runs 24/7: when the East and West checkpoints close, use the lanes next to TSA PreCheck in the middle of the Departures level.
  • The Silver Line station connects to the terminal through an indoor tunnel with moving sidewalks, so Metro riders never go outside.
  • United's new Concourse E opens in fall 2026; check your gate, as some United flights will use it.

Leaving for IAD?

Pick your flight and where you're starting. Leave By checks live traffic, security lines and your terminal, and tells you the minute to walk out the door.

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Questions travelers ask

How early should I get to Dulles (IAD)?

Dulles recommends arriving 2 hours before domestic flights and 3 hours before international flights. Allow extra time to reach midfield gates by AeroTrain or Mobile Lounge.

Is TSA security at Dulles open 24 hours?

Yes. The airport says screening is available 24/7; overnight, when the East and West checkpoints close, use the screening lanes next to TSA PreCheck on the Departures level.

Where do Uber and Lyft drop off at Dulles?

Rideshare drop-offs are at ground-level curbs 3A/B and 3G/H outside Baggage Claim, with a short walk inside to escalators up to ticketing. Pickup is at the same 3rd curb, zones 3A-3H.

Sources

Airport conditions change. Always follow your airline's check-in and bag-drop deadlines.

Other airports near Dulles

DCARonald Reagan Washington National Airport23 miles away · how early to get thereBWIBaltimore/Washington International Thurgood Marshall Airport45 miles away · how early to get there

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