Cheap flights from Washington to Kaua'i from $128

In general, January is the cheapest month to fly from State of Washington to Kaua'i. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $406. The month of September is another great option to travel to Kaua'i, with average flight prices from State of Washington averaging around $503.

According to our data, Monday is the cheapest day to fly to Kaua'i from State of Washington. The lowest ticket price found for a Monday departure recently was $581. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $685. These prices are subject to change though, so be sure to set up a Price Alert for flights to Kaua'i.

The cheapest time of day to fly to Kaua'i is at noon when flights can be purchased for as low as $469. In contrast, the most expensive time of day to depart to Kaua'i is in the morning when prices are around $672.

Fly from Seattle/Tacoma Intl to Lihue for the best Washington - Kaua'i flight prices

You are more likely to see cheaper flights to Kaua'i from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Kaua'i for around $582 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Kaua'i from State of Washington for as low as $442 on momondo.

There are 4 cabin classes available to choose from on Washington to Kaua'i flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

American Airlines, United Airlines, and Alaska Airlines are the most popular carriers operating from Washington to Kaua'i

Alaska Airlines, Delta and Hawaiian Airlines are the top three most popular airlines that fly to Kaua'i from State of Washington according to our data. Alaska Airlines is the first choice among our users, with 60% of people opting to fly with this airline when traveling to Kaua'i. Keep in mind that there are 6 different airlines that fly to Kaua'i on a routine basis, so you have a few additional options to choose from.

As of February 2026, there are 7 flights per day flying from State of Washington to Kaua'i. The most common time of day flights depart is 2:00PM, with 50% of flights taking off in the afternoon.

As of February 2026, 49 flights take off from State of Washington and land in Kaua'i each week. The most common flight departure day for this route is Thu, with 22% of weekly flights taking off on this day.