NEW YORK (AP) — Passengers on Delta Air Lines Monday afternoon were unable to check in for their flights because of a malfunction with the airline's website, mobile app and airport kiosks.

Travelers from different parts of the country complained about the problem on Twitter. Delta spokesman Paul Skrbec did not have a number for passengers affected by the outage but said it was not system-wide. Employees were helping passengers at ticket counters and Skrbec described the problem at the kiosks as "intermittent." Passengers were also reporting long wait times on the phone.

The computer problems came on a day with massive flight delays and cancelations in New York and Boston due to a winter storm.

Delta canceled more than 200 of its mainline flights Monday and hundreds of others belonging to regional airlines flying under its name, according to tracking site FlightAware.

The company said that its computer problem had caused a "small number" of delayed departures.

A call to the airline's reservation center was met with a grim message: "We are currently experiencing technical difficulties which we are diligently working on. You may want to try your call again later."

Jill Andreu, of East Bank, West Virginia, was trying to book a work trip on Delta.com but kept getting an error message.

"I fly Delta because I feel safe with them and feel their customer service is unparalleled," she said via email. "One would think technology upgrades would be another example of their first-rate service, but that often hasn't been the case."

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Scott Mayerowitz can be reached at http://twitter.com/GlobeTrotScott.