WILMINGTON, Ohio — Pilots for a cargo airline that carries packages for Amazon and DHL went on strike Tuesday, potentially causing delivery delays just as the holiday shopping season swings into high gear.

The airline, ABX Air, said it would seek a court order to end the strike by about 250 pilots.

The Teamsters union, which represents the pilots, said the strike had caused 75 flights to be canceled. ABX operates 35 daily flights for Amazon and 45 daily flights for DHL, the union says.

The pilots allege that ABX is understaffed and forces them to work on days off without giving them the compensatory time off that they are owed under their contract.

The airline’s president, John Starkovich, said the strike is illegal and that the dispute should be settled through arbitration.

A spokesman for ABX parent company Air Transport Services Group Inc. said the company would not comment on the impact of the strike.

A DHL spokeswoman said “deliveries to portions of the Americas will be delayed today” because of the strike, and DHL is watching the situation. Amazon did not respond immediately to requests for comment.

Between them, DHL and Amazon accounted for 65 percent of Air Transport Service’s revenue in the third quarter.

The company’s shares fell 24 cents, or 1.4 percent, to $16.44 on Tuesday.


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