By David Shepardson

WASHINGTON (Reuters) -The U.S. Federal Aviation Administration is delaying flights at Ronald Reagan Washington National Airport and Dallas Fort Worth International Airport due to air traffic control staffing issues as a government shutdown hits its 30th day.

The FAA said flight delays were averaging 91 minutes at Reagan and 21 minutes at Dallas and it expected to delay flights at Orlando later due to staffing issues. Tens of thousands of flights have been delayed or canceled as staffing outages have increased dramatically during the government shutdown.

Earlier on Thursday, the FAA had issued a ground stop for Reagan Airport, citing issues with air traffic controller staffing.

Bad weather is also delaying flights throughout the U.S. northeast.

More than 13,000 air

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