Best time to fly Seattle to Lihue

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

Best month

April

90% on time · 90 flights

Worst month

March

58.6% on time · 93 flights

Month Flights On time Cancelled When late, by
January 93 63% 0% 56 min
February 84 69.9% 1.19% 71 min
March 93 58.6% 3.23% 46 min
April 90 90% 0% 33 min
May 93 83.9% 0% 41 min
June 90 77.8% 0% 60 min
July 93 70.3% 2.15% 48 min
August 93 71% 0% 36 min
September 90 78.7% 0% 52 min
October 93 81.5% 1.08% 42 min
November 89 70.5% 0% 51 min
December 93 61.4% 3.23% 100 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.