IWK to SEA, Iwakuni Kintaikyo Airport to Seattle–Tacoma International Airport Cheap Flights

Based on HopeGoo data, All Nippon Airways offers one-way fares as low as US$932 on Cheapest nonstop routes (e.g. IWK to SEA on Fri, Feb 20), while All Nippon Airways offers Cheapest nonstop round-trips from US$2,031 departing on Mon, Feb 23 and returning on Mon, Mar 2.

At the moment, several airlines serve connecting flights from Iwakuni to Seattle, including: All Nippon Airways Selected airlines are based on historical data collected from flight bookings made by users on HopeGoo within the last 90 days.

By analyzing data from all airlines on the HopeGoo flight calendar, it looks like the best time to book a flight from Iwakuni to Seattle is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

To find best deals on flights from Iwakuni to Seattle, you can use various tools on HopeGoo: · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Fri, Feb 20, with one-way flights priced at just US$932. · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is All Nippon Airways. · Set up price alerts to easily monitor ticket prices without having to check every day. · Check HopeGoo flight deals and promo codes frequently. · Avoid peak season unless you book very early. It seems the peak season for Seattle travel is around August. · Get exclusive promo codes for HopeGoo app users.

The cheapest months to fly from Iwakuni to Seattle is September, when demand for travel is lower.

After crunching the numbers on our February flight calendar, it's currently cheapest to fly from Iwakuni to Seattle on February 23, 2026 with All Nippon Airways, with prices starting at US$2,031.

You can land at any one of the following hubs in Seattle, with Iwakuni Airport to Seattle–Tacoma International Airport (IWK-SEA) is by far the most common option on this route: King County (Boeing Field) International Airport (BFI) Kenmore Air - Lake Union (LKE) Seattle–Tacoma International Airport (SEA).

The time difference between Seattle and Iwakuni is 17h.

Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your HopeGoo, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.