Airlines are expected to cancel 6% of their flights at 40 of the busiest airports in the U.S. on Tuesday to comply with an order from the Federal Aviation Administration amid the government shutdown —...

American air travelers could face more frustrations Tuesday as the Federal Aviation Administration is set to reduce more flights at major U.S. airports across the country.

U.S. airlines canceled more than 1,500 flights Saturday and more than 2,900 Sunday to comply with an FAA order to reduce traffic as some air traffic controllers, who have gone unpaid for nearly a mont...