A delayed or canceled flight can derail your dream vacation before it really begins, especially if it’s going to make you late for a connecting flight or maybe even to catch a cruise!

But the good news is that the U.S. Department of Transportation says airlines are doing a better job.

According to the Air Travel Consumer Report, the 12 reporting U.S. carriers canceled 0.29% of their scheduled domestic flights in November 2016, an all-time low. For some perspective, those carriers canceled 1.0% of flights in both November 2015 and October 2016.

Check out Clark Howard for the list of the best and the worst performers.