Best Time to Fly JFK to SEA

The cheapest days to fly New York (JFK) to Seattle (SEA) are usually Wednesday. Sunday is often the priciest day in the current pattern.Updated June 29, 2026.

Best to Fly

Wednesday

Departure Day

MON

TUE

WED

THU

FRI

SAT

SUN

Wednesday tend to offer the lowest base fares. Avoid Sunday.

Best to Book

45-60

Days Advance

Current booking window for this route. Prices often jump significantly inside 21 days.

Best to Go

APR

Lowest Fares

Historical low-season for SEA.

Analyst Brief

The timing gate for New York (JFK) to Seattle (SEA) shows strong weekday stratification. Leaving on Wednesday avoids the Sunday business-travel premium. Ensure you pair this departure timing with the 45-60 day booking window.