Several airlines at Orlando International Airport (MCO) said they are offering flight changes, re-bookings, cancellations or refunds without penalty to customers affected by the Federal Aviation Administration's decision to reduce air traffic by 10% at 40 airports.

The first day of the Federal Aviation Administration’s slowdown saw more than 1,000 flights canceled, according to FlightAware, a website that tracks flight disruptions. Over 700 were off for Saturday — typically a slow travel day.

FAA orders schedule reductions at 40 domestic airports starting Friday due to the government shutdown, prompting United Airlines to offer customer refunds.

U.S. airlines began canceling hundreds of flights Thursday due to the Federal Aviation Administration’s order to reduce traffic at the country’s busiest airports starting Friday because of the government shutdown.

The government shutdown has triggered 1,000-plus flight delays as the FAA cuts capacity at 40 airports. Airlines are offering refunds and policy changes amid ongoing travel disruptions.