The flight to Hawaii from Seattle is approximately 5 hours and 34 minutes on the air. The remaining time is for taxiing out and taxiing in.
The air distance between Seattle and Hawaii is about 2,677 miles or 4,308 kilometers. Some flights might take longer in the air, so the air time could also be about 6 hours and 3 minutes.
Seattle-Tacoma International Airport (SEA) to Honolulu International Airport (HNL) is the most popular, and SEA also flies to Hilo International Airport, Kahului Airport (OGG), Lanai Airport, Lihue Airport (LIH), and Kona International Airport (KOA).
The nonstop flight duration between SEA to KOA is 6 hours 4 minutes, SEA to OGG is 5 hours 55 minutes, and LIH is 5 hours and 58 minutes.
Delta takes about a total of 5 hours 55 minutes, Hawaiian Airlines takes about 5 hours 56 minutes, and Alaska Airlines takes about 6 hours 4 minutes on average.
Suppose a flight from Seattle to Hawaii leaves on time. The flight takes 18 minutes to taxi out, which is the duration from leaving the gate to taking off. It spends 334 minutes or 5 hours 34 minutes on the air and takes 5 minutes taxiing, which is when the flight touches down at the end of the journey to its gate.
The flight took 5 hours 57 minutes, and arrived 11 minutes early.
As there are sporadic instances that flights depart on time, you could be at the gate for quite a while. Gate departures might also be slowed because of late checking-in or if the luggage has not made it over to the plane.
Some factors that might delay your flight include adverse weather conditions, wind speed, mechanical delays, air traffic control restrictions, aircraft cleaning and preparations, maintenance issues, time for fueling, etc.
If the airports are congested due to various reasons, the plane might need to wait a while before finally being able to take off. Turbulences that occur once you are in the air might also affect the flight's timing. If there is an increase in air traffic, the plane might need to circle above the airport for a while before finally landing at the destination.