SEA - KIX

$371 Find Cheap Flights from Seattle to Osaka Kansai Intl

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Kansai Intl departing on 10/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Osaka Kansai Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Osaka.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Osaka.
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Cheap Flights from Seattle to Kansai Intl (SEA-KIX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Kansai Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Kansai Intl

Sun, Jul 13 - Tue, Jul 22
Asiana Airlines Logo
2:30 pm - 9:05 pmSEA-KIX
14h 35m1 stop
Asiana Airlines Logo
10:50 am - 12:45 pmKIX-SEA
17h 55m1 stop
$666Asiana Airlines
Find Deal
Wed, Oct 15 - Thu, Nov 6
Air Canada Logo
10:00 am - 4:25 pmSEA-KIX
14h 25m1 stop
Air Canada Logo
7:10 pm - 10:06 pmKIX-SEA
19h 56m1 stop
$670Air Canada
Find Deal
Wed, Sep 17 - Wed, Sep 24
Air Canada Logo
5:30 am - 4:25 pmSEA-KIX
18h 55m1 stop
Air Canada Logo
8:25 am - 2:16 pmKIX-SEA
21h 51m2 stops
$684Air Canada
Find Deal
Sun, Jul 13 - Tue, Jul 22
Asiana Airlines Logo
2:30 pm - 9:05 pmSEA-KIX
14h 35m1 stop
Asiana Airlines Logo
10:50 am - 12:45 pmKIX-SEA
17h 55m1 stop
$688Asiana Airlines
Find Deal
Sat, Oct 4 - Fri, Oct 24
ANA Logo
4:30 pm - 10:20 pmSEA-KIX
13h 50m1 stop
ANA Logo
4:05 pm - 2:25 pmKIX-SEA
14h 20m1 stop
$802ANA
Find Deal
Wed, Sep 10 - Sat, Sep 20
ANA Logo
7:00 am - 2:50 pmSEA-KIX
15h 50m1 stop
ANA Logo
4:10 pm - 10:59 pmKIX-SEA
22h 49m2 stops
$810ANA
Find Deal
Tue, Oct 14 - Sun, Oct 26
STARLUX Airlines Logo
1:15 am - 12:15 pmSEA-KIX
19h 00m1 stop
STARLUX Airlines Logo
12:20 pm - 4:05 pmKIX-SEA
19h 45m1 stop
$895STARLUX Airlines
Find Deal
Fri, Aug 29 - Sat, Sep 6
STARLUX Airlines Logo
1:15 am - 12:15 pmSEA-KIX
19h 00m1 stop
STARLUX Airlines Logo
1:25 pm - 4:10 pmKIX-SEA
18h 45m1 stop
$897STARLUX Airlines
Find Deal
Tue, Sep 30 - Mon, Oct 13
China Airlines Logo
1:10 am - 12:50 pmSEA-KIX
19h 40m1 stop
China Airlines Logo
1:10 pm - 7:20 pmKIX-SEA
22h 10m1 stop
$902China Airlines
Find Deal
Thu, Oct 16 - Thu, Oct 23
China Airlines Logo
1:10 am - 12:00 pmSEA-KIX
18h 50m1 stop
China Airlines Logo
1:10 pm - 7:20 pmKIX-SEA
22h 10m1 stop
$935China Airlines
Find Deal
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KAYAK's insights & trends for Seattle to Kansai Intl flights

Get data-powered insights and trends into flights from Seattle to Kansai Intl to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Seattle to Osaka Kansai Intl?

The average price of all round-trip flights from Seattle to Osaka Kansai Intl Airport clicked on KAYAK for each day over the last 12 months.

When flying from Seattle to Osaka Kansai Intl, you should consider leaving on a Thursday and avoid Sundays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Thursdays and the most expensive ones on Sundays.

What is the cheapest month to fly from Seattle to Osaka Kansai Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Osaka Kansai Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Osaka Kansai Intl Airport is February, where tickets cost $801 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,543 and $1,207 respectively.

How far in advance should I book a flight from Seattle to Osaka Kansai Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Osaka Kansai Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Osaka Kansai Intl Airport, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Good to know

Low seasonMay
High seasonMarch
Cheapest flight$371
Best time to beat the crowds but there is an average 5% increase in price.
Most popular time to fly with an average 8% increase in price.
Flight from Seattle to Osaka Kansai Intl

When to book flights from Seattle to Kansai Intl

Are your dates flexible? Find out the best times to travel from Seattle to Kansai Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Seattle to Osaka Kansai Intl flights

  • What is the cheapest flight from Seattle to Osaka Kansai Intl Airport?

    In the last 3 days, the lowest price for a flight from Seattle to Osaka Kansai Intl Airport was $371 for a one-way ticket and $666 for a round-trip.

  • Do I need a passport to fly between Seattle and Osaka Kansai Intl?

    Yes, you’ll need a passport to travel to Osaka Kansai Intl from Seattle.

  • Which airports will I be using when flying from Seattle to Osaka Kansai Intl?

    When flying out of Seattle you will be using Seattle/Tacoma Intl. You will be landing at Osaka Kansai Intl, also known as Osaka Kansai Intl.

  • Which aircraft models fly most regularly from Seattle to Osaka Kansai Intl?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Osaka Kansai Intl?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Seattle and Osaka Kansai Intl, with Star Alliance being the most commonly used for this route.

  • What is the most popular layover when flying to Osaka Kansai Intl from Seattle?

    Vancouver is the most popular layover city among KAYAK users traveling from Seattle to Osaka Kansai Intl.

  • Which is the best airline for flights from Seattle to Osaka, STARLUX Airlines or Korean Air?

    The two airlines most popular with KAYAK users for flights from Seattle to Osaka are STARLUX Airlines and Korean Air. With an average price for the route of $1,105 and an overall rating of 9.1, STARLUX Airlines is the most popular choice. Korean Air is also a great choice for the route, with an average price of $1,133 and an overall rating of 8.4.

  • How does KAYAK find such low prices on flights from Seattle to Osaka Kansai Intl?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Osaka Kansai Intl.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Osaka Kansai Intl?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Osaka Kansai Intl from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Osaka Kansai Intl?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Osaka Kansai Intl with an airline and back to Seattle with another airline. Booking your flights between Seattle and KIX can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Osaka Kansai Intl?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Osaka Kansai Intl from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Seattle to Kansai Intl

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Osaka. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Kansai Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
9.1
STARLUX AirlinesOverall score based on 180 reviews
9.0Boarding
8.9Food
9.0Entertainment
9.0Comfort
9.3Crew
Airline reviews

Greetings when you arrive on the plane and good bye when you leave. Very attentive flight attendants.

8.0 Excellentivan, Jun 2025TPE - SFO
Read more STARLUX Airlines reviews

Greetings when you arrive on the plane and good bye when you leave. Very attentive flight attendants.

Serve me a meal, I fell asleep during the flight. So they passed me twice.

Seats are not table comfortable. Crew members are pretty good. Can be much better!!

Very pleasant overall, although the movie selection could have been better.

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety.

I usually have ear problems when planes land. But the landing was so smooth I didn’t even notice it landing! The service was excellent!

the aircraft was fine and new. The crews can have better training. Their operations are not as smooth as EVA's. They are VERY stingy with drinking water. Throughout the entire flight, no one offered me any water and snacks. I still prefer EVA after trying out Starlux initially with lots of excitement and expectations.

Everything was smooth and professional. They could improve the raw vegan meal with fresher offerings, but otherwise they are now my favorite way to fly to Asia.

Leg space is small. Need more room for long flight.

Leg space is too small. Need to increase space for long flight.

They need to improve on how the plane lands cause it was not smooth at all.

I did not like how the plane landed. It was not smooth.

Been flying with China Airline over years many times. Good experience with them, no issues.

China Airlines crews are very excellent doing their job. Very friendly and hardworking. I will always choose China Airlines over and over. Thank you all for making my flight comfortable. God bless to all the staff. :)

It was our first time flying with China Airlines and had a very nice experience. The airline staff & crews both on the ground and air were very nice. Food on the plane was very good. Will recommend it to family and friends.

I don’t think I’ll be flying them again. Tight seats, no flowing air or air nozzles that you can turn air on you, for those who could have motion sickness this would be your worst nightmare. The pilot was great and experienced (which is what you want when flying 12 hours) overall I’m thankful knowledgeable pilots!

I would like to commend the staff from this flight. They all looked happy and I can tell they love what they are doing and constantly smiling while serving the passengers. Special mention to the guy FA in our section. I did not get his name but he is so far the best F.A I have ever encountered!

When I booked a premium economy ticket. I then had to pay $100+ to book my seat.

Boarding could have been a little bit better but other than that it was a pretty good experience. I think because of the stowaway to Paris France recently they are being extra diligent about boarding passes at the gate. But they boarded the back of the plane first, and that's something I really think needs to start in the USA.

Didn't like on this return inbound flights (from Hong Kong to Vancouver) Outbound to the Hong Kong was good.

Due to turbulence there was no inflight service, which is very understandable, The flight is very short, and safety is more important. There was a bit of a delay with take off, but was to be expected with the rain.

The crew was amazing, really friendly and efficient. One of the best flights I have ever been on. They made the long flight comfortable and I noticed there were two birthdays on the flight. They gave to customers birthday cards and wished them a happy birthday. That was very nice to see.

Everything was great. Wifi was down,but that didn't matter to me.

The staff are very kind ,friendly and helpful .This is my first time flying with ANA and surely will fly again.

The best best best flight experience I have ever had. And I fly A LOT. THANK YOU, ANA!!!

My wife and I liked almost everything about ANA except for the economy seat space and the cold breakfast (croissant which seemed to just come out of the fridge)

Excellent service and comfortable seats. Friendly and helpful staff. No food for a 3hr flight over lunch time which was surprising (or is that a feature of domestic flights in Japan?)

When booking the flight i picked it because it said flying with ana even on our e-ticket as well but I showed up to the airport and I flew with united. I have flew with both airlines before and I prefer ana for the food quality and comfortable. So I was disappointed in that outcome and felt the food gave me minor ibs. The whole thing was missing leading with not getting what I thought I was paying for. Felt a bait and switched. Do not have confidence in using this app in the future trips

This was a large plane with an upper deck. It seems like business was upstairs. If it was a US airline then I would say I sat in economy plus, but I think it was just economy. Though since ANA would not allow me to choose seats for the price it may have been plus. Lots of movies to choose from, and good service.

This was the best airline I’ve ever taken. The staff are amazing. The food was great. The pilot was phenomenal. I would highly recommend this airline.

The beefsteak on the lunch menu was excellent! I usually do not eat airplane food. I loved it.

Flight was too cold. I wore a regular cotton tee and it wasn’t enough. It was a night time flight so I would have thought a blanket would be provided to passengers. A 4 hour flight and no options for a meal? I flew Asiana the next day from Seoul to Manilla. Same duration, 4 hours. They give everyone a pillow and blanket and serve a meal. Why is United so cheap and holding back meals and amenities? Also, they promote too much gay stuff and DEI in their advertisements. Please be mindful of other beliefs and don’t shove your gay ideology down my throat.

Staff always with a smile and very helpful with my mom who has mobility issues.

It was amazing. I was not expecting the phenomenal customer service Asiana provides.

It was all perfect and very pleasant for such long flights

The seats felt very small. We were supplied with pillows and blankets, which was nice. Lots of noise from the bathroom, plus exterior noise. Made it hard to hear the entertainment system, even using my own noise-cancelling headphones. The food was really bad. I generally request a vegetarian meal and one was supplied, but the pasta was cold and hard and there was nothing pleasant about it. Two meals were served on this flight; one was a repeat of the meal I had had on the flight immediately preceding this one, which was bad enough I didn't even try it. Drinks were very limited. All I wanted was water, and on a 10.5 hour flight, I was given 3 cups of about 3 ounces each.

The seats felt very small. We were supplied with pillows and blankets, which was nice. Lots of noise from the bathroom, plus exterior noise. Made it hard to hear the entertainment system, even using my own noise-cancelling headphones. The food was really bad. I generally request a vegetarian meal and one was supplied, but the pasta was cold and hard and there was nothing pleasant about it. Drinks were very limited. All I wanted was water, and on a 4 hour flight, I was given 2 cups of about 3 ounces each.

We took business class, It was comfortable and I was able to sleep.

Everything was perfect. A flight attendant even brought me snacks after I declined food due to my desire to force myself to follow the destination time zone.

For the most part, it was an enjoyable experience. It's the 2nd half of the journey was a bit uncomfortable. It was on a noticable smaller plane compared to the previous one.

Flight was delayed but the real issue is how long we sat after boarding. Space very limited for an overnight flight and seatbacks didn’t recline so it was almost impossible to sleep.

The staff made sure I was comfortable, moved me to a better seat with more leg room

The whole experience what excellent, from Anjou at the ticket counter to the attendants on the flight. Although it was an older plane, it was a very good flight. One of the best flights I have had on Air Canada!

All was good with comfort and ease of boarding. There was confusion from what gate to board at. Meant moving a long distance but I allowed plenty of time for this.

Good airport. Good entertainment on the big flight. Did not have a good way to prop up or mount my phone/ipad

Air Canada at SeaTac was the best. Polite, helpful, all good!

Economy middle seat was so narrow that I could not sit back comfortably with passengers on either side of me. Over the 9-hour flight, with my body slightly twisted most of that time, my previously-healthy left knee became very painful, even though I got up to walk multiple times. The knee is still painful 3 weeks later. Otherwise, it was a nice flight, but I was crippled over my entire vacation.

The problem in part was with the airports, not really the fault of Air Canada. Confusing directions regarding the gate, in Seattle the recommended shuttle train entrance was not working. Simular problems in Toronto. Baggage arrived in good time. Marx Bros movie on entertainment from Seattle. I was told I was laughing too loudly, by the flight attendant. No lounge in Seattle. Lounge in Toronto excellent.

Dealing with Air Canada was totally miserable and as a result of their website incompetence, lack of customer support, and total non-responsiveness we could not use this flight. We have made a formal complaint to Air Canada and are waiting to hear back, but if prior experience (more than one hour waits on the telephone with no response) is any guide, we wonder if we will ever hear back at all.

People were very nice and helpful. But the plane is noisy, and crowded. Seats are too small. Plane was too cold too. Air Canada app is very slow. Couldn't upgrade seats to the next section. Also surprised that basic economy seats were actually standby.

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