Cheap flights from Seattle to Kahului from C$ 157

If you aren’t able to travel during the month of January, then book flights to Kahului from Seattle during September instead. Flights to Kahului in September, while not as cheap as those in January, still average around C$ 622.

The cheapest day to depart from Seattle to Kahului is on a Thursday when prices can be found for as low as C$ 399. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around C$ 923. 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$ 550 when looking at flights departing in the afternoon. Flights to Kahului are more costly in the morning, with an average ticket price of C$ 845. Departure times in the morning 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$ 758 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$ 639 on momondo.

There are 3 cabin classes available to choose from on Seattle to Kahului flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 11% on your flight if you consider stops on a Seattle to Kahului flight.

As of September 2026, prices for Seattle to Kahului flights are approximately 132% more expensive when compared to flights at the same time last year.

United Airlines and Southwest 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 64% 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 14% 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 139 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights departing in the early afternoon 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 11% of their flights experiencing any sort of delay.

As of September 2026, 6 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 57% of daily flights taking off in the afternoon.

The number of flights available between Seattle and Kahului is 45 per week as of September 2026. The most frequent departure day is Mon, with 24% of weekly flights leaving on this day.