It's always wonderful to travel to Hawaii from the United States mainland, but it's helpful to know how long the flight will take. The trip can differ significantly depending on where you're leaving from. Flights from the East Coast take longer to reach their destination, when flights from the West Coast are typically shorter. For instance, flights from seattle to hawaii usually take about six hours, making it one of the most convenient routes to the islands. While flights from New York or Chicago might take nearly 10 hours, those from locations like Los Angeles or San Francisco are somewhat shorter. The trip will be more enjoyable and stress-free if you plan before you go and know how long it will take.