Cheap flights from Seattle to Kahului from C$ 229

If you aren’t able to travel during the month of September, then book flights to Kahului from Seattle during January instead. Flights to Kahului in January, while not as cheap as those in September, still average around C$ 560.

The cheapest day to depart from Seattle to Kahului is on a Thursday when prices can be found for as low as C$ 393. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around C$ 871. These prices are subject to change though, so be sure to set up a Price Alert for flights to Kahului.

Flying to Kahului from Seattle in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as C$ 541 when looking at flights departing in the afternoon. Flights to Kahului are more costly at noon, with an average ticket price of C$ 939. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Seattle/Tacoma Intl to Kahului for the best Seattle/Tacoma Intl - Kahului flight prices

You are more likely to see cheaper flights to Kahului from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Kahului for around C$ 735 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Kahului from Seattle for as low as C$ 593 on momondo.

You could potentially save up to 9% on your flight if you consider stops on a Seattle to Kahului flight.

As of April 2026, prices for Seattle to Kahului flights are approximately 25% more expensive when compared to flights at the same time last year.

United Airlines and Delta are the most popular carriers operating from Seattle/Tacoma Intl to Kahului

Alaska Airlines, Hawaiian Airlines and Delta are the top three most popular airlines that fly to Kahului from Seattle according to our data. Alaska Airlines is the first choice among our users, with 52% of people opting to fly with this airline when travelling to Kahului. Keep in mind that there are 3 different airlines that fly to Kahului on a routine basis, so you have a few additional options to choose from.

Historically, on average around 15% of flights between Seattle and Kahului have experienced a delay on any given week. The average delay length over the past 12 months has been 141 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

Wednesday is statistically the day of the week that experiences the fewest delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, Delta has had the least delays on this route over the last 12 months, with about 9% of their flights experiencing any sort of delay.

As of April 2026, 9 flights take off from Seattle and land in Kahului each day. The most common flight departure time for this route is 2:00p.m., with 44% of daily flights taking off in the afternoon.

The number of flights available between Seattle and Kahului is 68 per week as of April 2026. The most frequent departure day is Sat, with 16% of weekly flights leaving on this day.