What is a ground stop? It's the FAA's emergency brake. When an airport suddenly can't handle the planes headed its way, the agency orders flights bound for that airport to stay on the ground wherever they are, often for an hour or more. That's why you can be sitting at your gate in Chicago on a perfectly sunny afternoon and still not be going anywhere, because the problem is at the airport you're flying to. Ground stops happen somewhere in the US most weeks, and with the busiest flying days of the year coming up at Thanksgiving, it's worth knowing what one means for your trip.
What a Ground Stop Actually Is
A ground stop is an order from the FAA's command center in Virginia, which manages the flow of planes across the whole country. When it calls one for an airport, flights headed there that haven't taken off yet have to wait at their departure airports. Planes already in the air keep flying and land as planned, and flights leaving the affected airport can usually still go.
The usual triggers are bad weather like thunderstorms or strong wind, but a ground stop can also come from an equipment outage, a shortage of air traffic controllers or a security problem. Sunday's stop at Las Vegas came from strong winds, which limited how many planes could safely land. You can see how that day played out on our Las Vegas delays page.
Many ground stops last somewhere between 30 minutes and a couple of hours. The FAA sets an expected end time when it issues one, but it can extend or cancel it early depending on how things improve.
Ground Stop vs. Ground Delay Program
These two get mixed up a lot, and they feel different from your seat.
A ground stop is blunt. Every affected flight waits, with no set departure time, until the FAA lifts it. A ground delay program is the more organized version. When the FAA knows an airport will be short on capacity for several hours, it gives each flight headed there its own assigned departure time, sometimes an hour or more later than scheduled. Your airline's app will usually show it as a delay, and the gate agent may mention an "EDCT," which is the FAA's term for that assigned takeoff time.
Think of it like a crowded restaurant. A ground stop is the host telling everyone at the door to wait while the kitchen catches up. A ground delay program is handing out reservation times so people stop showing up all at once.
Why Your Plane Waits on the Ground
It can be maddening to sit at the gate when the weather where you are is perfect. The reason is fuel and safety. Holding a plane on the ground costs almost nothing, but holding it in the air means circling near a busy airport while burning fuel, and if conditions don't improve the plane may have to divert somewhere else. Keeping you on the ground is the safer and cheaper way to make you wait.
It also explains why delays spread so far. A ground stop at one big hub can hold planes at dozens of airports at once, and every plane and crew that leaves late is late for its next flight too. That's how a windstorm in Las Vegas ends up delaying a flight from Boston, and how one bad afternoon at a major airport turns into a long night across the country. Busy airports with construction or tight capacity, like Boston, get hit by these programs often, as we covered on our Boston delays page.
What to Do If Your Flight Is Held
Check the FAA's own airport status page at nasstatus.faa.gov, which shows active ground stops and delay programs and when they're expected to end. It's often more up to date than the departure board. Your airline's app is the next best place to watch for a new departure time.
Stay near the gate. A ground stop can lift early, and when it does, airlines try to board quickly, so wandering off to a restaurant across the terminal can cost you your seat. If you have a tight connection on the other end, ask the gate agent or the airline's app about later options before everyone else does.
Remember that a ground stop for weather isn't something the airline caused, so US airlines won't owe you meals or a hotel for it. If your flight ends up canceled and you decide not to travel, though, you're entitled to a full refund.
Why This Matters for Thanksgiving
The days around Thanksgiving are some of the busiest of the year, and with planes this full, a single ground stop can be hard to recover from because there are few empty seats to rebook stranded travelers. If you haven't picked your dates yet, our guide to the best days to fly for Thanksgiving shows which days airlines expect to be quietest. Early-morning flights are your best bet, since storms and delays tend to build through the afternoon. And leave yourself some slack on the way there, because the turkey will wait but a missed connection on the Wednesday before Thanksgiving might not have an easy fix.
