You cannot know for certain until the airline announces it, but you can check the real-time status starting the night before

Flight cancellations are announced by the airline, not by a central authority, and most happen within 24 hours of departure. You can see your flight's status on your airline's website or app by entering your confirmation number and last name. The airline will also send you an email or text if your flight is cancelled — but do not wait for that message. Check yourself the evening before and the morning of your flight.

Weather, mechanical issues, crew scheduling, and air traffic control decisions all cause cancellations. Some of these become clear only hours before departure. If your flight is cancelled, the airline is required to rebook you on the next available flight at no extra cost, or refund your ticket price.

Key Takeaways

  • Check your airline's website or app the night before and the morning of your flight — do not rely on email notifications alone.
  • Most cancellations are announced within 24 hours of departure, but some happen closer to flight time.
  • Weather forecasts and airport notices can signal higher cancellation risk, but they do not may provide your flight will be cancelled.
  • If your flight is cancelled, the airline must rebook you on another flight or refund your ticket at no cost.
  • Arriving at the airport early gives you a better chance of getting a seat on an earlier flight if cancellations create a backlog.

Where to check your flight status in real time

Log into your airline's website or mobile app and enter your booking reference (confirmation number) and last name. Most airlines show the current status of your flight — on time, delayed, or cancelled — along with gate information once you arrive at the airport. This is the most direct source because the airline updates it as conditions change.

You can also visit FlightAware.com or FlightRadar24.com, which track flights in real time using radar data and airline feeds. These sites show you the aircraft's current location, altitude, and speed, plus any delays or cancellations reported by the airline. They are useful if you want to see whether the plane scheduled for your flight is already in the air or still on the ground elsewhere.

The Transportation Security Administration (TSA) publishes airport wait times on its website, but this does not tell you whether your specific flight is cancelled. It only shows how busy security lines are at that moment.

Signs that cancellations are more likely tomorrow

Severe weather — thunderstorms, heavy snow, ice, or high winds — causes most cancellations. Check the National Weather Service forecast for your departure and arrival cities the night before. If the forecast shows severe weather during your flight window, cancellation risk is higher, but the flight may still operate if the weather clears or passes quickly.

Airport notices and ground stops also signal cancellation risk. The Federal Aviation Administration (FAA) issues ground stops when air traffic control cannot safely handle the volume of flights — usually because of weather or a major mechanical issue at the airport. You can see active ground stops on the FAA's website under "Delays and Cancellations." If a ground stop is in effect at your destination, your flight may be delayed or cancelled.

Mechanical issues at your departure airport can cascade through the day. If the aircraft scheduled for your flight had a problem the day before and was still being repaired, your flight may be cancelled or delayed. Check your airline's website or call the airline directly if you see your flight listed as delayed the day before.

What to do if you suspect your flight might be cancelled

Do not change your plans based on a forecast or a ground stop alert. These conditions change, and most flights operate even when weather looks bad. Instead, check your airline's website the night before and again two hours before your scheduled departure time. If your flight is still listed as on time, plan to go to the airport.

If you want to move your flight to an earlier time before any cancellation happens, contact your airline directly. Some airlines allow you to change your flight for free if severe weather is forecast, but policies vary. Ask the airline whether you can move to an earlier flight without a fee, and do this as soon as you know the forecast, because earlier flights fill up quickly.

If your flight is cancelled after you have already paid, the airline must rebook you on the next available flight to your destination at no cost, or refund your ticket price in full. You do not have to accept the first rebooking they offer — you can ask for a flight the next day or later if that works better for you.

How far in advance cancellations are usually announced

Most airlines announce cancellations between 24 and 2 hours before departure. Some cancellations happen even closer to flight time if a mechanical issue is discovered during preflight checks or if weather deteriorates suddenly. A few airlines cancel flights the night before if they know a crew member will not be available, but this is less common.

Do not assume your flight is safe just because it has not been cancelled yet. Check again the morning of your flight and once more before you leave for the airport. The airline will notify you by email or text if your flight is cancelled, but these messages sometimes arrive late or go to spam, so checking the website yourself is more reliable.

What happens if you arrive at the airport and your flight is cancelled

Go directly to the airline's customer service desk. Do not wait in the general check-in line. The airline will rebook you on the next available flight to your destination, usually the same day if seats are open. If no flights are available that day, the airline must book you on the first flight the next morning.

If the cancellation is the airline's fault — mechanical issue, crew problem, or overselling — you may be may have access to to compensation under Department of Transportation rules. Compensation ranges from $250 to $1,350 depending on how late you arrive at your destination. If the cancellation was caused by weather or another circumstance outside the airline's control, compensation is not required, but the airline still must rebook you or refund your ticket.

Keep your boarding pass and any receipts for meals or hotel stays if you are stranded overnight. You may be able to claim these as expenses if the airline is responsible for the cancellation.

Frequently Asked Questions

Can I get my money back if my flight is cancelled?

Yes. If your flight is cancelled, you can request a full refund of your ticket price instead of accepting a rebooking. The airline must process the refund within a set timeframe — usually 7 to 10 business days. You do not have to choose between a refund and a rebooking when ready; you can ask the airline which option is available and take time to decide.

Will the airline pay for my hotel if I am stranded overnight?

Only if the cancellation was the airline's fault. If weather caused the cancellation, the airline is not required to pay for lodging. If the airline caused it — mechanical issue, crew problem, or overselling — the airline must cover hotel costs. Ask the airline's customer service desk whether they will pay before you book a room yourself.

What if I miss my connection because my first flight was cancelled?

The airline is responsible for getting you to your final destination. If you miss a connection because of a cancellation on the first flight, the airline must rebook you on the next available flight to your final destination at no cost, even if it is on a different airline. You do not pay anything extra.

Should I go to the airport if my flight shows as on time but weather looks bad?

Yes. Go to the airport as planned. Weather forecasts change, and most flights operate even in bad conditions. The airline will cancel your flight only if conditions are unsafe for takeoff or landing. If you skip the airport and your flight operates, you will lose your ticket.

Can I see which aircraft is assigned to my flight?

Yes, on most airlines' websites and apps. The aircraft number (tail number) appears in your booking details. You can enter this number into FlightAware or FlightRadar24 to see where that plane is right now and whether it is on schedule. If the aircraft is still several hours away, your flight is more likely to be delayed or cancelled.