Major airlines say they are planning to cancel hundreds of flights on Friday – out of thousands of daily flights – as the Federal Aviation Administration is set to begin limiting flight capacity at 40 major U.S. airports amid the government shutdown.

American Airlines said Thursday it will cancel about 220 of its roughly 6,000 departures starting Friday and lasting through this weekend.

United Airlines said in a statement it plans to cancel less than 200 of its more than 5,000 flights each day through the weekend. The airline has listed the flight cancellations on a special website along with other information for travellers.

A company spokesperson told ABC News that about half of customers who had their flights cancelled were able to be rebooked within 4 hours of their original departure time.

DC area: Baltimore/Washington International, Washington Dulles International and Ronald Reagan Washington National.

West: Denver International, Las Vegas McCarran International, Los Angeles International, Oakland International, Ontario International, Portland International, Phoenix Sky Harbor International, San Diego International, Seattle/Tacoma International, San Francisco International and Salt Lake City International.

Hawaii and Alaska: Anchorage International and Honolulu International.

Many other airports could be impacted as well, since flights from the major cities where FAA cuts are mandated travel to smaller airports. (CNN)