Delta says pilot scheduling is leading to flight cancellations

• Delta Air Lines canceled hundreds of flights over a weekend due to crew scheduling issues.
• An internal memo revealed that outdated technology and processes for pilot scheduling are a primary cause.
• The pilots' union stated that its members are working significant overtime to keep flights operating.

Delta Air Lines is apologizing to passengers after canceling hundreds of flights over the weekend. The airline made a promise to customers that it is actively working to improve its operational reliability going forward. 

Between May 2 and May 3, Delta canceled nearly 350 flights and delayed hundreds more, according to FlightAware. The airline acknowledged the cancellations in a statement to USA TODAY and said they were caused largely by crew scheduling issues. 

“We apologize to our customers for higher than usual cancellations this past weekend due to crew resources. This is not consistent with the operational reliability that Delta is known for and has our full attention,” the airline’s statement said. 

An internal memo from April 24 obtained by USA TODAY acknowledged ongoing staffing hitches in greater depth. 

The letter was sent by Ryan Gumm, the airline’s senior vice president of flight operations, and said that flight operations-related cancellations are up significantly since 2024. The problems primarily stem from pilot scheduling. 

According to the letter, Delta has had to rely on alternative processes to staff trips more regularly. Gumm’s memo said that pilot acceptance of uncovered trips has decreased in recent years, meaning that in cases when the originally scheduled pilot is unable to fly their trip, it has been taking longer to reassign those flights. That’s leading the airline to make more complex scheduling decisions and assignments closer to departure time than usual. 

The memo notes that Delta’s operation has grown more complex over the last 15 years, but crew scheduling technology and processes have not evolved at the same rate. 

Pilots agree that scheduling has become an issue, and their union said they’re doing their best – including working significant overtime – to keep Delta’s flights operating safely. 

Pilots at Delta are members of the Air Line Pilots Association. Eric Criswell, the chairman of Delta’s ALPA master executive council, said in a letter to members on April 4 that it is unfair of the company’s management to lay blame for these scheduling difficulties at pilots’ feet. 

“Delta pilots have stepped up to perform overtime flying on their days off in record numbers to keep the operation moving,” the letter said. “Mismanagement of resources, lack of proper tools and training for Crew Schedulers, and numerous misguided attempts to pinch pennies during the 2025 ‘centennial’ celebration set Delta on this unfortunate and avoidable path.” 

To address the technological pinch point contributing to the staffing issues, Delta said it is investing in automation and other technology tools to improve scheduling efficiency. 

The company is also increasing staffing levels to help make its operations more redundant. According to Gumm’s memo, Delta has 20% more pilots on its payroll now than it did in 2019, and its hiring has outpaced the expansion of flight hours across the airline. 

Still, pilot union representatives told USA TODAY that Delta’s hiring fell short of its attrition rates in 2025, leaving a staffing gap in 2026. 

Delta’s contract with its pilots becomes amendable Dec. 31, and the airline and its pilot group are in active talks about the next contract. 

For now, the acute staffing issues that popped up over the weekend seem to have been resolved. On May 4, Delta canceled just 29 flights, according to FlightAware. 

Zach Wichter is a travel reporter and writes the Cruising Altitude column for USA TODAY. He is based in New York, and you can reach him at [email protected].