An EDCT, or Expect Departure Clearance Time, is the time air traffic control expects a flight to take off when there isn't room for every flight at its destination or along its route. Instead of letting planes take off on schedule and circle when they arrive, the FAA gives each affected flight a later takeoff time and has it wait on the ground at its origin, where waiting is cheaper and safer.
When flights get an EDCT
EDCTs come from traffic management programs that meter flights rather than stop them outright:
- Ground delay programs (GDPs): an airport can accept fewer arrivals than are scheduled, usually because of forecast low clouds, fog, wind or thunderstorms, so each inbound flight gets an arrival slot and a matching EDCT. See ground stop vs. ground delay program.
- Airspace flow programs (AFPs): the same idea for a congested piece of airspace, such as a line of storms flights have to cross, instead of one airport.
A ground stop is different: it holds flights with no assigned time until it is lifted. Ground stops are often followed by a ground delay program, and that is when EDCTs appear.
What an EDCT means for your flight
- It is a takeoff time, not a gate time. The flight is expected to take off within a few minutes either side of the EDCT (the usual window is 5 minutes early to 5 minutes late), so the airline plans boarding and pushback backwards from it.
- Your delay is roughly the EDCT minus the scheduled departure, plus any wait for a gate or crew at the other end.
- You may board and wait. Some airlines board on time and hold at the gate or on the ground near the runway; others delay boarding until closer to the EDCT.
- It can change. Programs are revised as conditions change. Slots freed by cancellations can move flights earlier, and an extended program can push them later. Airlines can also swap slots between their own flights, so a high-priority flight may leave before yours.
- Missing the window costs time. A flight that can't make its EDCT (late passengers, a maintenance issue, a long taxi) needs a new one, which can be considerably later.
How to read an EDCT
Air traffic control systems give EDCTs in UTC, often written in “Zulu” time like 2145Z. Convert to the departure airport's local time to compare it with your boarding pass: Eastern Daylight Time is UTC minus 4 hours, so 2145Z is 5:45 PM EDT. GroundStop.app shows each EDCT in the departure airport's local time.
How to check yours
- Enter your flight number in the EDCT lookup. It shows any EDCT for each leg, along with the flight's status, gates and the inbound plane.
- Check the destination on the live map or its airport page to see whether a ground delay program is in effect and its average and maximum delay.
- Follow your airline's app and gate announcements: the crew gets the official EDCT and any revisions first.
If the delay grows long, see what to do when your flight is affected and your rights.