Best time to fly Newark to Los Angeles

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full EWR to LAX record →

Best month

March

83.3% on time · 742 flights

Worst month

July

65.9% on time · 958 flights

Month Flights On time Cancelled When late, by
January 671 71.6% 2.24% 76 min
February 616 73.9% 5.03% 73 min
March 742 83.3% 1.48% 71 min
April 761 74.8% 0.79% 62 min
May 813 75% 1.72% 90 min
June 838 68.6% 0.84% 76 min
July 958 65.9% 3.86% 120 min
August 976 76.7% 3.48% 96 min
September 969 79.2% 1.24% 73 min
October 985 76.4% 1.02% 64 min
November 872 73% 1.38% 68 min
December 898 70% 0.89% 71 min

What a seasonal pattern can and cannot tell you

Months differ for reasons that repeat — summer thunderstorms in the American interior, winter fog and de-icing in northern Europe, school holidays filling every seat and leaving no slack in the schedule. Those are real and they come back each year.

What the pattern cannot do is forecast a particular flight. A quiet month has late days and a bad month has punctual ones. Treat this as a way to choose between two dates you are indifferent about, not as a promise.