The airlines with the highest cancellation rates vary by year and season

No single airline is always the worst for cancellations. The carriers with the highest cancellation rates shift depending on the year, the season, and which metric you measure. In 2023, Spirit Airlines and Frontier Airlines had the highest cancellation rates among major carriers, but those rankings change. Winter months see more cancellations across all airlines due to weather. Summer sees cancellations spike at specific carriers when they overbook routes or face crew shortages.

The U.S. Department of Transportation publishes monthly reports on airline performance, including cancellation rates. These reports break down cancellations by carrier and show which airlines canceled the most flights in a given month. You can find these reports on the DOT website under "Aviation Consumer Protection." The data is public and updated monthly, so you can check the most recent numbers before booking.

Cancellation rates are measured two ways: the percentage of flights canceled (cancellation rate) and the total number of flights canceled. A small airline might have a high percentage but cancel fewer flights overall. A large airline might have a lower percentage but cancel more flights in raw numbers because it operates more flights.

Key Takeaways

  • Spirit Airlines and Frontier Airlines have historically had higher cancellation rates than legacy carriers like Delta, United, and American, though this varies by month and season.
  • The U.S. Department of Transportation publishes free monthly reports showing cancellation rates for every airline, updated on their Aviation Consumer Protection page.
  • Winter weather causes cancellations to rise across all airlines, while summer cancellations often reflect crew shortages or overbooking at specific carriers.
  • An airline's cancellation rate (percentage) and total cancellations (raw number) are different measures — a small airline can have a high rate but cancel fewer flights overall.

Where to find current cancellation data for each airline

The Department of Transportation's Bureau of Transportation Statistics publishes a monthly airline on-time performance report. This report includes cancellation rates for all carriers that operate scheduled service in the United States. You can access it at bts.dot.gov under "Airline On-Time Performance." The report is released about six weeks after the month ends, so January data appears in early March.

The report shows cancellation rates broken down by airline and sometimes by airport. You can see which carriers canceled the most flights at major hubs like Atlanta, Dallas, or Chicago. The data is free and requires no registration. You can read it as a spreadsheet or view it in a table on the website.

FlightAware and other flight-tracking websites also publish cancellation statistics, though these are not official government data. They can give you a real-time sense of which airlines are canceling flights on a specific day, but the DOT report is the authoritative source for historical trends.

Why some airlines cancel more flights than others

Cancellations happen for different reasons, and some airlines are more vulnerable to certain causes. Weather is the top reason for cancellations across all carriers, but it affects airlines differently depending on their route network. An airline that operates many flights through Denver or Chicago in winter will see more weather-related cancellations than one that focuses on warm-weather routes.

Crew scheduling and staffing shortages cause cancellations at some carriers more than others. After the pandemic, many airlines struggled to hire and train pilots and flight attendants fast enough to match demand. Carriers that grew their schedules faster than their workforce grew saw more cancellations. Budget airlines like Spirit and Frontier operate with thinner margins and smaller reserve crews, so a single absence can force a cancellation.

Mechanical issues cause fewer cancellations overall, but they vary by airline based on fleet age and maintenance practices. Older aircraft require more maintenance and are more likely to develop problems that ground a flight. Airlines that have invested in newer planes tend to have fewer mechanical cancellations.

Seasonal patterns in airline cancellations

Winter months — December, January, and February — see the highest cancellation rates across all airlines. Snow, ice, and low visibility ground flights at northern airports. Airlines that serve many northern routes (like those operating out of Minneapolis, Denver, or Boston) see sharper increases in winter cancellations.

Summer cancellations are often driven by crew shortages and overbooking rather than weather. July and August are peak travel season, and some airlines schedule more flights than they have crews to operate. When a flight is overbooked, the airline cancels it rather than bump passengers, because cancellation is cheaper than paying compensation and rebooking costs.

Spring and fall are typically the most stable seasons for cancellations. Weather is milder, demand is lower than summer, and airlines have had time to adjust staffing. If you have flexibility in when you travel, booking in April, May, September, or October reduces your exposure to cancellation-prone seasons.

How to reduce your risk of being on a canceled flight

Book on airlines with lower historical cancellation rates. Check the DOT report for the previous three months before you book. If one carrier consistently cancels fewer flights on your route, book with them. The difference between a 1 percent cancellation rate and a 3 percent rate is small on any single flight, but it matters if you fly often.

Avoid peak travel times. Flights in early morning (6 a.m. to 8 a.m.) are less likely to be canceled than afternoon flights, because morning cancellations cascade through the day. Flights on Tuesday, Wednesday, and Thursday are more stable than Friday through Sunday. Booking a flight that departs early in the week reduces your cancellation risk.

Book direct flights when possible. Connecting flights are canceled more often because a cancellation on one leg affects the whole itinerary. A direct flight has only one opportunity to be canceled. If you must connect, allow at least two hours between flights so a delay on the first leg does not force a cancellation of the second.

Check the weather forecast for your destination and the airline's hub cities before you book. If a winter storm is forecast for the day you plan to fly, consider moving your flight. Airlines are more likely to cancel flights preemptively when severe weather is certain, rather than cancel them at the last minute.

What happens if your flight is canceled

If your flight is canceled, the airline must rebook you on the next available flight to your destination at no extra cost. This applies whether the cancellation was due to weather, mechanical issues, or crew problems. You do not have to accept the rebooking — you can also request a refund of your ticket price instead.

The airline is not required to pay compensation for weather-related cancellations under U.S. law, but they must still rebook you or refund your ticket. For cancellations caused by the airline's own operations (crew shortage, mechanical issue, overbooking), some airlines offer compensation, though this varies by carrier and is not federally required.

If you are stranded overnight due to a cancellation, the airline may provide a hotel and meals, but this is not required by law. Budget airlines especially rarely offer these amenities. If you paid for your ticket with a credit card, your card issuer may cover hotel costs if the airline does not.

Frequently Asked Questions

Which airline cancels the most flights right now?

The answer changes month to month. Check the Department of Transportation's monthly on-time performance report at bts.dot.gov for the most recent data. Spirit and Frontier have historically had higher rates, but you should verify current numbers before booking.

Does flying early in the morning reduce cancellation risk?

Yes. Early morning flights (before 9 a.m.) are canceled less often because they have not been affected by delays from earlier flights. Afternoon and evening flights are more likely to be canceled because mechanical issues, crew delays, or weather earlier in the day cascade through the schedule.

Can I get money back if my flight is canceled?

You can request a refund instead of a rebooking, and the airline must offer it. However, you are not may have access to to compensation money beyond your ticket price unless the cancellation was caused by the airline's own actions (not weather). Some airlines offer vouchers or compensation voluntarily, but this is not required by law.

Are budget airlines more likely to cancel flights?

Budget carriers like Spirit and Frontier have historically had higher cancellation rates than legacy airlines like Delta and United. They operate with smaller crews and tighter margins, so staffing shortages hit them harder. However, cancellation rates vary by month, so check current data for your specific route.

What should I do if I see my flight is about to be canceled?

Call the airline when ready rather than waiting for an official cancellation notice. If you call first, you may be able to rebook on an earlier flight or a different airline before the cancellation is announced and everyone else calls. Have your confirmation number ready when you call.