Southwest does cancel flights, but not more often than other major carriers
Southwest Airlines cancels flights at roughly the same rate as American, Delta, and United — around 1 to 2 percent of scheduled flights on an average day. The airline does not have a pattern of cancelling more flights than competitors, though specific days, routes, and weather events can push cancellation rates much higher for any carrier.
When Southwest does cancel, the reasons are the same ones that ground other airlines: severe weather, mechanical issues, crew scheduling problems, air traffic control delays, or staffing shortages. During the winter holidays or summer travel peaks, cancellations across the industry tend to spike because airports and airlines are operating at or near capacity.
The most visible Southwest cancellations happened in December 2022, when a system failure in crew scheduling software caused the airline to cancel thousands of flights over several days. That was an unusual event tied to a specific operational failure, not a sign of chronic problems.
Key Takeaways
- Southwest cancels roughly 1 to 2 percent of flights on a typical day, which is in line with other major U.S. carriers.
- Weather, mechanical issues, crew problems, and air traffic delays cause most cancellations across all airlines, including Southwest.
- Cancellation rates rise sharply during peak travel periods like holidays and summer, when all airlines operate near maximum capacity.
- You can check whether your specific Southwest flight is cancelled by visiting Southwest.com, calling 1-800-I-FLY-SWA, or checking your email for notifications from the airline.
- If your flight is cancelled, Southwest will rebook you on the next available flight at no charge, or you can request a refund instead of a flight credit.
How to learn about your Southwest flight is cancelled
The fastest way is to log into your Southwest account on Southwest.com and check your reservation. The site shows the status of every flight you have booked — "On Time," "Delayed," or "Cancelled" — in real time. You can also call Southwest's customer service line at 1-800-I-FLY-SWA (1-800-435-9792) and give them your confirmation number.
Southwest also sends email and text notifications to passengers whose flights are cancelled, usually within a few hours of the decision. Check your email inbox and spam folder if you have not heard from the airline but suspect your flight may be affected. The airline typically makes cancellation decisions in the morning for that day's flights, though weather-related cancellations can happen at any time.
You can also check flight status on third-party sites like FlightAware or the FAA's website, which track real-time delays and cancellations across all carriers. These sites do not show your specific reservation, but they do show whether the flight number itself is cancelled or delayed.
What Southwest will do if your flight is cancelled
Southwest will automatically rebook you on the next available Southwest flight to your destination at no charge. The airline does not charge change fees, so you will not owe anything extra. If the next available flight is several hours or days away, you can ask to be rebooked on a competing airline — American, Delta, United, or Alaska — and Southwest will pay for that ticket.
You also have the right to a refund instead of a rebooking. If you choose a refund, Southwest will return the full fare you paid, not a flight credit. You can request a refund through your Southwest account, by calling customer service, or by visiting a Southwest ticket counter at the airport.
If the cancellation forces you to stay overnight, Southwest does not automatically provide hotel or meal vouchers. You can ask for reimbursement for those expenses after the fact, and the airline will consider your request, but there is no may provide. Keep receipts if you pay out of pocket.
Cancellation rates by season and route
Cancellations rise sharply during winter (December through February) and summer (June through August), when weather is more volatile and passenger volume is highest. During these periods, expect cancellation rates to climb to 2 to 3 percent or higher on any given day. Spring and fall typically see lower cancellation rates across all airlines.
Routes that pass through weather-prone regions — the Northeast in winter, the Midwest during severe weather season, and Florida during hurricane season — see more cancellations than stable routes like Los Angeles to San Francisco. If you are booking a flight during peak season on a weather-sensitive route, build in extra time before a connection or important appointment.
Southwest's focus on point-to-point routes (rather than hub-and-spoke like other carriers) means that a single cancellation affects fewer downstream flights. If a Southwest flight from Denver to Las Vegas is cancelled, it does not cascade into cancellations in five other cities the way it might with a hub-based airline.
Why weather causes the most cancellations
Severe weather — thunderstorms, heavy snow, ice, or high winds — is the leading reason airlines cancel flights. When conditions are unsafe for takeoff or landing, the FAA restricts flights into and out of affected airports. Southwest cannot override this, and neither can any other carrier.
Winter storms in the Northeast and Midwest, summer thunderstorms in Florida and the Southeast, and wind events in mountain passes all create waves of cancellations. A single storm system can cancel hundreds of flights across multiple airlines in a matter of hours.
You cannot prevent a weather cancellation, but you can reduce the risk by avoiding travel during severe weather forecasts. Check the National Weather Service forecast for your departure and arrival cities before you book, and consider flying on a different day if a major storm is predicted.
Mechanical issues and crew problems
Mechanical problems account for a smaller share of cancellations than weather, but they do happen. If an aircraft develops a maintenance issue that cannot be fixed quickly, Southwest will cancel the flight rather than delay it for hours. The airline prioritizes safety over schedule.
Crew scheduling problems — pilots or flight attendants calling in sick, not arriving in time for a flight, or running out of legal flight hours — also cause cancellations. During peak travel periods, crews are stretched thin, and a single absence can cascade into multiple cancellations.
These cancellations are less predictable than weather, but they are also less common. You cannot know in advance whether a specific flight will face a mechanical or crew issue, so your best protection is to book flights early in the day (when crews are fresh and planes have had time to be serviced overnight) and to avoid the busiest travel days.
How to prepare for a possible cancellation
Book your flight at least two to three hours before a connection if you are flying through a hub, or earlier if you are flying during peak season. This gives you a buffer if your first flight is delayed or cancelled — you will still have time to make your connection.
Purchase travel insurance if your trip is expensive or time-sensitive. Travel insurance covers cancellations caused by weather and other events outside your control, and it will reimburse you for non-refundable bookings, hotels, and other costs. Read the policy carefully to understand what is and is not covered.
Sign up for Southwest's notifications through the airline's app or website so you hear about cancellations as soon as they happen. The earlier you know, the more options you have to rebook or make other plans.
Frequently Asked Questions
Does Southwest cancel more flights than other airlines?
No. Southwest's cancellation rate is roughly 1 to 2 percent on an average day, which matches American, Delta, and United. All carriers cancel more flights during winter and summer, and all are affected by the same weather and operational issues.
Can I get a refund if Southwest cancels my flight?
Yes. You can choose either a rebooking on the next available Southwest flight or a full refund of your ticket price. You cannot get both. Request a refund through Southwest.com, by phone, or at the airport ticket counter.
What if I miss a connection because my first flight was cancelled?
Southwest will rebook you on the next available flight to your final destination at no charge. If the delay causes you to miss a hotel reservation or appointment, you can ask Southwest to reimburse those costs, but the airline does not automatically cover them.
How far in advance does Southwest announce cancellations?
Weather-related cancellations are usually announced a few hours before the flight. Mechanical or crew-related cancellations can happen with little notice. Check your reservation on Southwest.com or enable notifications so you hear about changes as soon as the airline makes them.
Should I buy travel insurance to protect against Southwest cancellations?
Travel insurance is worth considering if your trip is expensive, time-sensitive, or involves non-refundable bookings. It covers cancellations caused by weather and other events, and it reimburses hotels, rental cars, and other costs. Read the policy to see what is covered before you buy.