Our data shows that September tends to be the cheapest month to fly to Saint Kitts and Nevis from Seattle. Users have commonly found prices around $738 for the month, but tickets can be as low as $591. Due to multiple factors, prepare for potentially higher prices in December.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Saint Kitts and Nevis as you normally would.