Flight cancellations happen more often than most passengers expect

The number of flight cancellations in the United States varies by season, airline, and weather patterns. On a typical day, roughly 1 to 2 percent of all scheduled flights are cancelled — which means that on a day with 45,000 scheduled flights across the country, somewhere between 450 and 900 flights will not operate. During summer travel season or winter storms, that percentage climbs higher. During calm periods in spring or fall, it may drop below 1 percent.

The Federal Aviation Administration (FAA) tracks cancellation data but does not publish a single daily number. Instead, airlines report their own cancellations to the Department of Transportation, which publishes monthly reports. This means you cannot find a real-time national cancellation rate — only historical data and airline-specific patterns.

Cancellations are not evenly distributed. Some airlines cancel more flights than others, and some airports experience more cancellations due to weather, congestion, or staffing. A flight from Denver to Chicago in July faces different odds than a flight from Tampa to Boston in January.

Key Takeaways

  • Between 1 and 2 percent of U.S. flights are cancelled on an average day, with higher rates during summer and winter weather events.
  • The FAA does not publish a live national cancellation rate; the Department of Transportation releases monthly data by airline instead.
  • Weather, staffing shortages, mechanical issues, and air traffic congestion are the main reasons airlines cancel flights.
  • Cancellation rates vary significantly by airline, airport, and time of year, so your individual flight's risk depends on these specific factors.
  • You can check your airline's historical cancellation rate and monitor weather forecasts for your route to estimate your flight's risk.

Why airlines cancel flights

Weather is the single largest cause of flight cancellations. Thunderstorms, heavy snow, ice, and fog ground aircraft because they make takeoff or landing unsafe. Airlines cannot control weather, but they can decide how long to wait for conditions to improve. A flight delayed three hours might eventually take off, or the airline might cancel it and rebook passengers on later flights.

Staffing shortages cause the second major wave of cancellations. Pilots, flight attendants, and ground crew call in sick, take scheduled time off, or straightforward do not show up. During the summer of 2022, several major carriers cancelled hundreds of flights per day because they did not have enough staff to operate their scheduled routes. Staffing problems tend to spike on Fridays and Sundays when vacation travel peaks.

Mechanical issues and air traffic delays account for the remaining cancellations. An aircraft might develop a problem that requires repair before it can fly safely. Air traffic control might be overwhelmed at a major hub, causing a ripple effect that cancels flights hours later at smaller airports.

Which airlines and airports cancel the most

The Department of Transportation publishes monthly reports showing cancellation rates by airline. In recent years, Southwest Airlines has consistently reported higher cancellation rates than competitors like Delta, United, or American. However, these rates change month to month and year to year depending on weather, staffing, and operational decisions.

Certain airports experience more cancellations than others. Denver, Chicago, and Atlanta — three of the busiest U.S. airports — see frequent weather-related cancellations. Denver's high altitude and thin air create unique weather patterns. Chicago and Atlanta sit in regions prone to thunderstorms in summer and ice in winter. Smaller regional airports sometimes have higher cancellation rates because they have fewer staff and less flexibility to recover from disruptions.

You can find your airline's cancellation history by visiting the Department of Transportation's Bureau of Transportation Statistics website, which publishes monthly reports. These reports show cancellation rates by airline and sometimes by route, though the data lags by several weeks.

How to check if your specific flight might be cancelled

No website can tell you with certainty whether your flight will be cancelled — that decision happens hours before departure. However, you can reduce your risk by checking three things: your airline's historical cancellation rate, the weather forecast for your departure and arrival cities, and whether your flight is on a route known for delays.

Check your airline's recent performance on the Department of Transportation website. If your airline cancelled 3 percent of flights last month and the national average was 1.5 percent, your flight carries above-average risk. If the forecast shows thunderstorms or snow for your departure time, cancellation risk rises. If you are flying on a Friday afternoon in July from a major hub, you face higher risk than a Tuesday morning flight in April.

Flight tracking websites like FlightAware show real-time cancellations and delays for specific flights. You can search your flight number and see whether it has been cancelled or delayed on previous days. This does not predict your flight's fate, but it shows you the pattern.

Seasonal patterns in flight cancellations

Summer (June through August) sees high cancellation rates because of thunderstorms and passenger volume. Afternoon thunderstorms are common across the central and eastern United States, and they can ground flights for hours. Winter (December through February) brings snow and ice, particularly affecting airports in the Northeast and Midwest. Spring and fall typically have the lowest cancellation rates because weather is more stable and passenger demand is lower.

Holiday periods — Thanksgiving week, Christmas week, and New Year's week — see elevated cancellations because airlines operate at maximum capacity with less flexibility. A single weather event or staffing problem cascades across the entire system. Presidents' Day weekend and Memorial Day weekend also see higher cancellation rates.

What happens if your flight is cancelled

If your flight is cancelled, the airline must rebook you on the next available flight to your destination at no additional cost. If no flights are available that day, the airline must either provide a hotel and meal voucher or offer a refund. The specific rules depend on whether the cancellation was within the airline's control (mechanical issue, staffing) or outside it (weather, air traffic control).

You should contact your airline when ready after a cancellation is announced. Call the airline's customer service line or use their app to see rebooking options. Do not wait in the airport hoping for a standby seat — the airline's system will show you available flights faster than a gate agent can. If you booked through a third-party website like Expedia or Kayak, contact the airline directly, not the booking site, because the airline controls rebooking.

If you purchased trip insurance, check your policy to see whether cancellation is covered. Some policies reimburse you for the ticket if the airline cancels; others cover hotel and meal costs but not the ticket itself. Read your policy before the cancellation happens so you know what to expect.

How to reduce your cancellation risk when booking

Book early morning flights when possible. Early flights have fewer cascading delays because they operate before weather develops or staffing problems compound. An 8 a.m. flight is less likely to be cancelled than a 5 p.m. flight on the same route.

Avoid connecting flights on tight schedules. If your connection is less than 90 minutes and your first flight is delayed, you will miss it. A cancellation of the first flight leaves you stranded. Direct flights eliminate this risk but are not always available or affordable.

Fly on airlines with lower historical cancellation rates. Check the Department of Transportation data for the past three months. If one airline cancels 2 percent of flights and another cancels 1 percent on your route, the difference matters over time.

Build in buffer time. If you have a meeting or event the day you arrive, book a flight that arrives the day before. This protects you if your flight is cancelled and you cannot get another flight that day.

Frequently Asked Questions

What percentage of flights get cancelled on a typical day?

Between 1 and 2 percent of scheduled U.S. flights are cancelled on an average day. This varies by season — summer and winter see higher rates, while spring and fall see lower rates. During major weather events, the percentage can spike to 5 percent or higher.

Can I find out how many flights were cancelled yesterday?

The FAA does not publish daily cancellation totals. The Department of Transportation publishes monthly reports by airline, which are released several weeks after the month ends. FlightAware and other flight tracking sites show real-time cancellations, but they do not aggregate a national total.

Is my flight more likely to be cancelled if it's a connecting flight?

A connecting flight itself is not more likely to be cancelled than a direct flight on the same airline. However, you face higher overall risk because if either your first or second flight is cancelled, your trip is disrupted. Direct flights eliminate this compounding risk.

Do airlines cancel more flights on certain days of the week?

Yes. Fridays and Sundays see higher cancellation rates because passenger demand peaks and the system has less flexibility. Staffing shortages are also more common on these days. Tuesday through Thursday typically have lower cancellation rates.

What should I do if my flight is cancelled and I cannot get another flight that day?

Contact your airline when ready to see rebooking options. If none are available, the airline must provide a hotel room and meal voucher. You can also request a refund and book a flight on a different airline at your own cost, then ask the original airline to reimburse you — though they may refuse if the cancellation was weather-related.