The Department of Transportation says that 83.7 percent of flights on the biggest airlines arrived on time in January.
That's up from 76.3 percent in January 2011, and the best January since 1995, when the government changed the way delays are reported.
DOT said Thursday that fewer flights were canceled, too. About 1.5 percent of scheduled flights were scratched, down from 3.9 percent a year earlier.
There were no tarmac delays of more than three hours in January.
Researchers at Rutgers University say January snow cover in the lower 48 states was the third lightest since 1967.
