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685 € Cheap Flights from Seattle to Kansai International (Osaka)

Compare Seattle to Kansai International (Osaka) flight deals

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Flight deals from Seattle to Kansai International (Osaka)

Looking for a cheap last-minute deal or the best return flight from Seattle to Kansai International (Osaka) Airport? If you want to travel next month, return fares start from 756 €. Find the lowest prices on one-way and return tickets right here.
Osaka.685 € per passenger.Departing Sat, 29 Aug, returning Mon, 14 Sep.Return flight with Frontier Airlines and Jetstar Japan.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Sat, 29 Aug, arriving in Kansai International (Osaka).Inbound indirect flight with Jetstar Japan, departs from Kansai International (Osaka) on Mon, 14 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 685 €, select.
Osaka.695 € per passenger.Departing Sat, 12 Sep, returning Mon, 21 Sep.Return flight with Frontier Airlines and Jetstar Japan.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Sat, 12 Sep, arriving in Kansai International (Osaka).Inbound indirect flight with Jetstar Japan, departs from Kansai International (Osaka) on Mon, 21 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 695 €, select.
Osaka.756 € per passenger.Departing Wed, 19 Aug, returning Thu, 27 Aug.Return flight with Frontier Airlines and Jetstar Japan.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Wed, 19 Aug, arriving in Kansai International (Osaka).Inbound indirect flight with Jetstar Japan, departs from Kansai International (Osaka) on Thu, 27 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 756 €, select.
Osaka.792 € per passenger.Departing Wed, 16 Sep, returning Fri, 9 Oct.Return flight with Alaska Airlines and Air Busan.Outbound indirect flight with Alaska Airlines, departs from Seattle / Tacoma International on Wed, 16 Sep, arriving in Kansai International (Osaka).Inbound indirect flight with Air Busan, departs from Kansai International (Osaka) on Fri, 9 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 792 €, select.
Osaka.799 € per passenger.Departing Mon, 15 Feb, returning Mon, 1 Mar.Return flight with Cathay Pacific.Outbound indirect flight with Cathay Pacific, departs from Seattle / Tacoma International on Mon, 15 Feb, arriving in Kansai International (Osaka).Inbound indirect flight with Cathay Pacific, departs from Kansai International (Osaka) on Mon, 1 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 799 €, select.
Osaka.800 € per passenger.Departing Tue, 12 Jan, returning Tue, 26 Jan.Return flight with Cathay Pacific.Outbound indirect flight with Cathay Pacific, departs from Seattle / Tacoma International on Tue, 12 Jan, arriving in Kansai International (Osaka).Inbound indirect flight with Cathay Pacific, departs from Kansai International (Osaka) on Tue, 26 Jan, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 800 €, select.
Osaka.831 € per passenger.Departing Thu, 8 Oct, returning Mon, 26 Oct.Return flight with Cathay Pacific.Outbound indirect flight with Cathay Pacific, departs from Seattle / Tacoma International on Thu, 8 Oct, arriving in Kansai International (Osaka).Inbound indirect flight with Cathay Pacific, departs from Kansai International (Osaka) on Mon, 26 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 831 €, select.
Osaka.846 € per passenger.Departing Mon, 2 Nov, returning Mon, 16 Nov.Return flight with Cathay Pacific.Outbound indirect flight with Cathay Pacific, departs from Seattle / Tacoma International on Mon, 2 Nov, arriving in Kansai International (Osaka).Inbound indirect flight with Cathay Pacific, departs from Kansai International (Osaka) on Mon, 16 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 846 €, select.
Osaka.856 € per passenger.Departing Mon, 8 Feb, returning Mon, 22 Feb.Return flight with Cathay Pacific.Outbound indirect flight with Cathay Pacific, departs from Seattle / Tacoma International on Mon, 8 Feb, arriving in Kansai International (Osaka).Inbound indirect flight with Cathay Pacific, departs from Kansai International (Osaka) on Mon, 22 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 856 €, select.
Osaka.858 € per passenger.Departing Tue, 13 Oct, returning Mon, 2 Nov.Return flight with Cathay Pacific.Outbound indirect flight with Cathay Pacific, departs from Seattle / Tacoma International on Tue, 13 Oct, arriving in Kansai International (Osaka).Inbound indirect flight with Cathay Pacific, departs from Kansai International (Osaka) on Mon, 2 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 858 €, select.
Osaka.894 € per passenger.Departing Tue, 9 Mar, returning Tue, 23 Mar.Return flight with Cathay Pacific.Outbound indirect flight with Cathay Pacific, departs from Seattle / Tacoma International on Tue, 9 Mar, arriving in Kansai International (Osaka).Inbound indirect flight with Cathay Pacific, departs from Kansai International (Osaka) on Tue, 23 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 894 €, select.
Osaka.897 € per passenger.Departing Wed, 7 Apr, returning Wed, 21 Apr.Return flight with Cathay Pacific.Outbound indirect flight with Cathay Pacific, departs from Seattle / Tacoma International on Wed, 7 Apr, arriving in Kansai International (Osaka).Inbound indirect flight with Cathay Pacific, departs from Kansai International (Osaka) on Wed, 21 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 897 €, select.
Osaka.901 € per passenger.Departing Sat, 1 May, returning Tue, 1 Jun.Return flight with Cathay Pacific.Outbound indirect flight with Cathay Pacific, departs from Seattle / Tacoma International on Sat, 1 May, arriving in Kansai International (Osaka).Inbound indirect flight with Cathay Pacific, departs from Kansai International (Osaka) on Tue, 1 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 901 €, select.
Osaka.957 € per passenger.Departing Tue, 1 Dec, returning Thu, 10 Dec.Return flight with Asiana Airlines.Outbound indirect flight with Asiana Airlines, departs from Seattle / Tacoma International on Tue, 1 Dec, arriving in Kansai International (Osaka).Inbound indirect flight with Asiana Airlines, departs from Kansai International (Osaka) on Thu, 10 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 957 €, select.
Osaka.958 € per passenger.Departing Wed, 25 Nov, returning Thu, 3 Dec.Return flight with Asiana Airlines.Outbound indirect flight with Asiana Airlines, departs from Seattle / Tacoma International on Wed, 25 Nov, arriving in Kansai International (Osaka).Inbound indirect flight with Asiana Airlines, departs from Kansai International (Osaka) on Thu, 3 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 958 €, select.
Osaka.1.021 € per passenger.Departing Mon, 3 May, returning Fri, 28 May.Return flight with Cathay Pacific.Outbound indirect flight with Cathay Pacific, departs from Seattle / Tacoma International on Mon, 3 May, arriving in Kansai International (Osaka).Inbound indirect flight with Cathay Pacific, departs from Kansai International (Osaka) on Fri, 28 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 1.021 €, select.

Find the cheapest month to fly from Seattle to Kansai International (Osaka)

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to Kansai International (Osaka) flights are currently cheapest in September.
Jul
from 1.091 €
Aug
from 756 €
Sep
from 695 €
Oct
from 831 €
Nov
from 846 €
Dec
from 957 €
Jan
from 800 €
Feb
from 856 €
Mar
from 894 €
Apr
from 897 €
May
from 1.021 €
Jun
from 1.218 €

Seattle to Kansai International (Osaka): Alternative routes

Compare routes from Seattle to Osaka below. You may find an airport to fly into that's cheaper, faster, or easier than Kansai International (Osaka).

Itami Domestic (Osaka)

11km from central Osaka
Closest
from 818 €
Search flights

Kobe

26km from central Osaka
from 848 €
Search flights

Kansai International (Osaka)

38km from central Osaka
Cheapest
from 685 €
Search flights

Seattle to Osaka: Flight information

The things to know before you go.
Cheapest flight found685 €
Cheapest month to flyAugust

Finding cheap flights from Seattle to Kansai International (Osaka): Frequently asked questions

The best price we found for a return flight from Seattle to Kansai International (Osaka) is 685 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Seattle to Kansai International (Osaka). But we found flights with one stop from 685 €.
As of July 2026, there are no flights flying from Seattle to Kansai International (Osaka).
The cheapest month to fly from Seattle to Kansai International (Osaka) is usually August.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Kansai International (Osaka) Airport on Saturday, 29 August 2026.
No airlines currently offer direct flights between Seattle and Kansai International (Osaka) Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Kansai International (Osaka) but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Osaka is around 40 days in advance, so don’t leave your flight to the last minute.

The cheapest airline that flies to Kansai International (Osaka) is Frontier Airlines .

Flying from Seattle to Kansai International Airport (KIX): What you need to know

  • The timezone in Osaka is UTC+9, which is 17 hours ahead of Seattle. Kansai International Airport is located in Osaka.

  • Leave plenty of time to catch your flight from Seattle to KIX. It's generally best to arrive at least two hours before international departures and an hour ahead for domestic flights.

  • July is a busy month for travelling. If you're taking off then or during a major holiday like Christmas, get there even earlier. Aim for at least two hours ahead for domestic flights and as much as four hours for international journeys.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Stopovers are the ideal opportunity to break up your trip and perhaps even tour another city. When browsing cheap flights from Seattle to KIX leaving from Seattle-Tacoma International Airport (SEA), uncheck the 'Direct flights only' box to find out where you can stop along the way. Popular options include:

    • Tokyo Haneda International Airport (HND)

    • San Francisco International Airport (SFO)

    • Tokyo Narita International Airport (NRT)

  • SEA is about 23 kilometres from central Seattle. If you're catching a taxi, driving or ride-sharing from the centre, it'll take 25 minutes or so to get there, depending on traffic. If you're planning to take public transport, expect the journey time to be around 35 minutes.

  • Want a stress-free start to your break? Stay near Seattle-Tacoma International Airport. Whether you have an early flight from Seattle to Kansai International Airport or prefer not to rush, these hotels are the answer:

  • Seattle-Tacoma International Airport gets high marks for on-time performance. 80% of flights that take off from SEA reach their destination on time.

Seattle Paine Field International Airport (PAE)

  • You can arrive at PAE from the centre of Seattle in about 40 minutes by car (depending on traffic conditions). The journey by public transport will take roughly 1 hour 30 minutes to cover the 40 kilometres or so.

  • Catching an early morning flight? Think about checking in to one of these accommodation options near Seattle Paine Field International Airport the day before your Seattle to KIX flight:

  • Flights from Seattle Paine Field International Airport have a strong track record for punctuality, with 80% of them touching down as expected.

About Kansai International Airport (KIX)

Getting from Kansai International Airport (KIX) to central Osaka

  • From Kansai International Airport, central Osaka is around 48 kilometres away. It takes about 50 minutes to get to the city centre by car.

  • Travelling by public transport takes roughly 45 minutes.

How to find the cheapest flights from Seattle to Kansai International Airport (KIX)

  • The cheapest price we've found for a one-way ticket from Seattle to Kansai International Airport is 296 €. For a return flight on this route, the best price is 685 €. Depending on how early you book and the availability, these fares can change.

  • Don't leave things to the last minute. You're more likely to find cheap flights from Seattle to KIX if you book early. Airlines often offer some amazing early bird deals.

  • Cheap Seattle to Kansai International Airport tickets are easier to find if your travel dates are flexible. Try using the 'Whole month' tool to compare fares across each month and then choose the cheapest day.

  • Spend less time searching for cheap plane tickets from Seattle to KIX by creating a Price Alert. We'll send you an email or notification on the app when a lower fare becomes available.

  • Save on your flight from Seattle to Kansai International Airport by using the search filters. Select your ideal departure time, duration and airlines, then sort the results by 'Cheapest' for the best deals.

The best time to fly from Seattle to Kansai International Airport (KIX)

  • It's time to work out your travel dates for your flight from Seattle to Kansai International Airport (KIX). April is the busiest month to travel to Osaka. If crowds aren't your thing, go in December.

  • The warmest month in Osaka is August, with temperatures ranging between 21ºC (70ºF) and 34ºC (93ºF). Book your Seattle to KIX plane ticket then if that's your ideal forecast.

  • January sees temperatures of between 0ºC (32ºF) and 10ºC (50ºF). Look for cheap tickets from Seattle to Kansai International Airport around that time if you like travelling in cooler conditions.

More about Osaka

Explore more of Japan

  • You've done Osaka, now it's time to discover more of Japan. Journey about 177 kilometres northeast to Nagoya to check off its top attractions. From Nagoya Castle to Ninomaru Garden and Sky Promenade, you'll have a full itinerary ahead.

  • If there's time to check out another corner of Japan, head for Toyohashi, about 209 kilometres east of Osaka. Yoshida Castle, Okunoin and Futagawa Fushimi Inari are key highlights.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.