United Airlines is not currently under a system-wide ground stop, but individual flights may be delayed or cancelled for weather, mechanical issues, or air traffic control reasons

A ground stop means the Federal Aviation Administration (FAA) has ordered all flights for an airline to stop departing from certain airports or nationwide. United Airlines has experienced ground stops in the past — most notably in July 2024 when a software outage affected multiple airlines — but these are temporary and specific to the event causing them. If you are asking whether United is grounded right now, the answer depends on what happened today and where you are flying.

The confusion often comes from the difference between a system-wide ground stop (which affects the entire airline) and individual flight delays or cancellations (which affect one or a few flights). United, like every airline, experiences delays and cancellations every day due to weather, mechanical repairs, crew scheduling, or air traffic delays. That is not the same as being grounded.

Key Takeaways

  • A ground stop is an FAA order halting all departures for an airline; individual flight delays are not a ground stop.
  • You can check whether a specific United flight is delayed or cancelled on United's website, the FAA's website, or FlightAware without needing to call.
  • Weather, mechanical issues, and air traffic control delays cause most cancellations and are resolved within hours or a day.
  • If your flight is cancelled, United is required to rebook you on the next available flight at no extra cost or refund your ticket.

How to check if your United flight is affected right now

The fastest way to know whether your specific flight is delayed or cancelled is to check the United Airlines website directly. Go to unitedairlines.com, enter your confirmation number and last name under "Manage My Booking," and you will see the current status of your flight. The status updates in real time as conditions change.

You can also check the FAA's website at faa.gov/air_traffic/. The FAA publishes active ground stops, airport delays, and system-wide issues. If there is a ground stop affecting United or any airline, it will be listed there with the reason and expected duration. For a broader view of delays across all airlines at your airport, the site shows which airports are experiencing delays and why.

A third option is FlightAware (flightaware.com), a free flight tracking site that shows real-time delays, cancellations, and the reason for each. You can search by flight number or route and see what other passengers are reporting.

What causes most United flight delays and cancellations

Weather is the most common reason for delays and cancellations. Thunderstorms, snow, fog, or high winds can ground flights for hours while conditions improve or the airline repositions aircraft. These delays are not United's fault and are not a ground stop — they affect all airlines at the same airport.

Mechanical issues are the second most common cause. If a plane needs a repair before it can safely fly, United will cancel or delay the flight and either fix the aircraft or swap in a different one. This can take anywhere from an hour to several hours depending on what needs to be fixed.

Air traffic control delays happen when airports are congested or when the FAA restricts the flow of traffic into or out of an airport. This is not specific to United and affects all airlines equally. The FAA manages these delays to prevent unsafe conditions.

Crew scheduling issues — a pilot or flight attendant calling in sick, or a crew running late from a previous flight — can also cause delays. United tries to find a replacement crew quickly, but this can add hours to a flight.

What to do if your United flight is cancelled

If United cancels your flight, you have the right to either a rebooking on the next available United flight to your destination at no extra cost, or a refund of your ticket price. You do not have to choose when ready — you can ask United to rebook you and then decide whether to take the new flight or request a refund.

Contact United as soon as you see the cancellation. You can call their customer service line, use the United app, or go to the airport ticket counter. The sooner you contact them, the sooner they can rebook you on another flight, especially if the cancellation happened during a busy travel period when later flights fill up quickly.

If the cancellation was due to weather or an air traffic control issue, United is not required to pay you compensation under U.S. law. If the cancellation was due to a mechanical issue that United should have caught during maintenance, you may be may have access to to compensation, but this requires a separate claim and is not automatic.

The difference between a ground stop and a delay

A ground stop is an official FAA order that prevents an airline from departing any flights from one or more airports. Ground stops are rare and are issued only when there is a serious safety issue, a major system failure, or an emergency. When a ground stop is in effect, no United planes can take off until the FAA lifts the order.

A delay means a flight is running late but is still expected to depart and arrive. Delays can last from 15 minutes to several hours. A cancellation means the flight will not operate at all that day. Neither a delay nor a cancellation is the same as a ground stop.

The July 2024 software outage that affected multiple airlines, including United, was a rare event that caused widespread cancellations and delays but was not technically a ground stop — it was a system failure that prevented the airlines from operating normally. The FAA did not issue a formal ground stop order, but the effect was similar because the airlines could not function.

How long ground stops and major disruptions usually last

If the FAA does issue a ground stop, it typically lasts between 30 minutes and a few hours, depending on what caused it. The FAA will announce an estimated duration, though this can change if the problem is not resolved as quickly as expected.

Weather-related ground stops are usually the shortest because the FAA lifts them as soon as conditions improve enough for safe operations. Mechanical or system issues can take longer because the airline or FAA needs time to diagnose and fix the problem.

Once a ground stop is lifted, flights resume departing, but the backlog of delayed and cancelled flights can take a full day or more to clear. Planes and crews are out of position, and it takes time to get them back on schedule.

What to expect if you are booked on a United flight today

Check your flight status on the United website or app before you leave for the airport. If your flight is on time, arrive at the airport at the time United recommends (usually two hours before domestic flights). If your flight is delayed, the website will show the new departure time, and you can decide whether to head to the airport or wait for an update.

If your flight is cancelled, do not go to the airport. Contact United when ready to rebook or request a refund. If you are already at the airport when a cancellation is announced, go to the United ticket counter and they will rebook you on the next available flight.

Bring your confirmation number and ID. If you need to reach United by phone, have your booking information ready so the representative can pull up your reservation quickly.

Frequently Asked Questions

How do I know if United has a ground stop right now?

Check the FAA website at faa.gov/air_traffic/ for active ground stops, or call United customer service. If there is a ground stop, it will be listed with the reason and expected duration. You can also check your flight status on the United website — if your flight shows "cancelled" across the board, a ground stop may be the cause.

Can I get a refund if my United flight is delayed but not cancelled?

No. A delay is not a cancellation, and you are not may have access to to a refund for a delayed flight under U.S. law. You can use your ticket for the delayed flight or contact United to rebook on a different flight at no extra cost. If you choose not to fly, you can request a refund, but this is a cancellation of your booking, not a refund for the delay.

What should I do if I miss my connection because of a United delay?

Tell a United representative at the airport or contact United when ready. If the delay was United's fault and you missed your connection, United will rebook you on the next available flight to your final destination at no extra cost. If the delay was due to weather or air traffic control, United will still rebook you, but you may not be may have access to to compensation.

Is there a way to avoid delays when flying United?

You cannot avoid delays caused by weather or air traffic control, but you can reduce your risk by booking early morning flights (which have fewer delays because they have not accumulated schedule problems from earlier flights) and avoiding peak travel times. Mechanical delays are rare and unpredictable, so there is no way to avoid them completely.

Do I need to call United if my flight is delayed, or can I just show up at the airport?

If your flight is delayed but still operating, you do not need to call — just show up at the airport at the new departure time shown on the United website. If your flight is cancelled, call or use the app to rebook before going to the airport, so you know what your options are.