Cheap flights from Seattle to Kahului from $143

The cheapest month to fly to Kahului from Seattle is in September. Flight prices, which tend to average around $397, are often lower during this time because this is during the off-season. If you aren’t able to travel to Kahului during the month of September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $417.

Our data shows that Tuesday is the least expensive day to fly to Kahului. Tickets to fly out on this day can be as low as $481. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Kahului for around $669.

Our data shows that the cheapest Seattle to Kahului flights are usually those with departure times in the afternoon. Our users have found flights to Kahului in the afternoon for as low as $500. Flights in the evening are often more expensive with an average ticket price of $574.

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 $538 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 $447 on momondo.

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl 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 17% on your flight if you consider stops on a Seattle to Kahului flight.

As of March 2026, prices for Seattle to Kahului flights are approximately 19% more expensive when compared to flights at the same time last year.

United Airlines, Delta, and Alaska Airlines 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 68% of people opting to fly with this airline when traveling to Kahului. Keep in mind that there are 7 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 143 minutes.

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

Wednesday is statistically the day of the week which experiences the fewest number of 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 have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

San Francisco (SFO) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via San Francisco (SFO) offer the lowest average round-trip price of $420.

Flights connecting via Honolulu (HNL) have the shortest average one-way travel time: 8h 04m.

Honolulu (HNL) has the shortest average layover time for this route: 1h 07m.

As of March 2026, there are 11 flights per day flying from Seattle to Kahului. The most common time of day flights depart is 6:00PM, with 37% of flights taking off at noon.

The number of flights available between Seattle and Kahului is 79 per week as of March 2026. The most frequent departure day is Thu, with 19% of weekly flights leaving on this day.