SEA - OSA

$330 Find Cheap Flights from Seattle to Osaka

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 Osaka departing on 1/30. 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, 0 bags

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

 
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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Everything you should know

Cheapest round-trip
$618
Overall average: $793
ANA
Sat 2/7Sat 2/14
SEA - KIX • 1 stop
Cheapest one-way
$330
Overall average: $569
Alaska Airlines
Fri 1/30
SEA - KIX • 1 stop
Video guide: How to find cheap flights to Osaka
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Top airlines
ANA
Cheapest • from $618 (round-trip)
ANA
Best reviews • 8.4 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 15% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 19% price drop
April
Most popular
Good to know
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+1
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Osaka (SEA-OSA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Osaka 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 Osaka

Sat, Feb 7 - Sat, Feb 14
ANA Logo
3:45 pm - 8:35 amSEA-KIX
23h 50m1 stop
ANA Logo
3:45 pm - 1:20 pmKIX-SEA
14h 35m1 stop
$618ANA
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Fri, Jan 23 - Fri, Feb 6
ANA Logo
6:03 am - 4:40 pmSEA-KIX
17h 37m1 stop
ANA Logo
5:35 pm - 1:20 pmKIX-SEA
12h 45m1 stop
$620ANA
Find Deal
Fri, Dec 5 - Sun, Dec 21
ANA Logo
3:40 pm - 8:00 amSEA-UKB
23h 20m1 stop
ANA Logo
7:05 am - 1:20 pmUKB-SEA
23h 15m1 stop
$623ANA
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Tue, Nov 18 - Mon, Dec 8
Asiana Airlines Logo
12:10 am - 8:55 pmSEA-KIX
27h 45m1 stop
Asiana Airlines Logo
10:30 am - 1:55 pmKIX-SEA
20h 25m1 stop
$646Asiana Airlines
Find Deal
Mon, Jan 12 - Wed, Jan 28
Japan Airlines Logo
6:00 am - 6:50 pmSEA-KIX
19h 50m1 stop
Japan Airlines Logo
3:00 pm - 2:34 pmKIX-SEA
16h 34m2 stops
$647Japan Airlines
Find Deal
Sun, Jan 11 - Wed, Jan 28
Asiana Airlines Logo
12:10 am - 8:55 pmSEA-KIX
27h 45m1 stop
Asiana Airlines Logo
9:00 am - 1:55 pmKIX-SEA
21h 55m1 stop
$656Asiana Airlines
Find Deal
Tue, Jan 13 - Tue, Jan 20
Korean Air Logo
11:00 am - 10:10 amSEA-UKB
30h 10m1 stop
Korean Air Logo
11:10 am - 9:00 amUKB-SEA
14h 50m1 stop
$665Korean Air
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Mon, Feb 16 - Sun, Mar 15
Korean Air Logo
11:00 am - 10:10 amSEA-UKB
30h 10m1 stop
Korean Air Logo
6:40 pm - 10:00 amUKB-SEA
31h 20m1 stop
$669Korean Air
Find Deal
Mon, Nov 17 - Wed, Nov 26
Japan Airlines Logo
6:20 am - 8:15 pmSEA-ITM
20h 55m2 stops
Japan Airlines Logo
2:40 pm - 9:50 amITM-SEA
12h 10m1 stop
$709Japan Airlines
Find Deal
Sun, Jan 11 - Sun, Jan 18
Air Canada Logo
10:05 am - 6:55 pmSEA-ITM
15h 50m2 stops
Air Canada Logo
2:05 pm - 2:31 pmITM-SEA
17h 26m2 stops
$916Air Canada
Find Deal
Booking Insights

KAYAK's insights & trends for Seattle to Osaka flights

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

Find cheap flights to Osaka
Find cheap flights to Osaka

Planning a trip from Seattle to Osaka? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

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

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

If your flying dates are flexible, you should consider flying to Osaka on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Seattle to Osaka. For your return ticket, we recommend flying on a Thursday and avoiding Sundays for the best deals.

What is the cheapest month to fly from Seattle to Osaka?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Osaka, 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 is September, where tickets cost $737 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,217 and $1,168 respectively.

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

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, 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, you should book around 3 weeks before departure, which saves you about 15% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$330
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly and prices are also 12% lower on average.
Flight from Seattle to Osaka Kansai Intl

When to book flights from Seattle to Osaka

Are your dates flexible? Find out the best times to travel from Seattle to Osaka 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 flights from Seattle to Osaka

  • What are the different ticket classes available for flights from Seattle to Osaka, and how do airlines handle them?

    Delta Airlines offers Economy, Comfort+, First Class, and Delta One class. Japan Airlines provides Economy, Premium Economy, Business, and First Class options. ANA also offers Economy, Premium Economy, Business, and First Class. Each class has its own set of services and amenities, varying in comfort and price.

  • Which special amenities do airlines provide on flights from Seattle to Osaka?

    Delta Airlines offers in-flight entertainment, Wi-Fi on select aircraft, and complimentary snacks and beverages. Japan Airlines provides many amenities, including fully flat beds in First Class, Sky Wider seats in Premium Economy, and traditional Japanese cuisine options. ANA offers in-flight Wi-Fi, personal screens with entertainment, and meals inspired by Japanese and international flavors.

  • How can I leave the airport in Osaka after arriving from Seattle?

    Upon arrival in Osaka, you can utilize transportation services like Kansai Airport Limousine, Osaka Airport Transport, and Nankai Electric Railway. These companies offer airport shuttles, buses, and trains that can take you to various destinations within the city. They provide convenient and reliable options for getting out of the airport and reaching your final destination.

  • Do airlines accommodate special diets on flights from Seattle to Osaka?

    Delta Airlines offers special meals for passengers with specific dietary requirements, including vegetarian, vegan, and gluten-free options. Japan Airlines also caters to special dietary needs, offering meals for vegetarians, vegans, and those with religious or medical restrictions. ANA provides special meal options, such as vegetarian, vegan, and halal meals, with prior requests during booking or before the flight.

  • What is the cheapest flight from Seattle to Osaka?

    In the last 3 days, the lowest price for a flight from Seattle to Osaka was $330 for a one-way ticket and $618 for a round-trip.

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

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

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

    On your way to Osaka, you’ll fly out from Seattle/Tacoma Intl. You’ll be landing in one of Osaka’s 2 airports: Osaka Itami or Osaka Kansai Intl.

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

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

  • Which airline alliances offer flights from Seattle to Osaka?

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

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

    Tokyo is the most popular layover city among KAYAK users traveling from Seattle to Osaka.

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

    The two airlines most popular with KAYAK users for flights from Seattle to Osaka are ANA and Korean Air. With an average price for the route of $912 and an overall rating of 8.4, ANA is the most popular choice. Korean Air is also a great choice for the route, with an average price of $870 and an overall rating of 8.4.

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

    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.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Osaka 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?

    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 with an airline and back to Seattle with another airline.

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

    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 from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Osaka

  • When traveling with pets from Seattle (SEA) to Osaka (OSA), consider Delta and Japan Airlines. Delta allows pets in the cabin on certain flights, while Japan Airlines offers pet-friendly services in their cargo holds. Check their specific requirements, restrictions, and fees to ensure a smooth journey for your furry friends.
  • Travelers from Seattle to Osaka must have a visa to enter Japan. Ensure you have the necessary visa by contacting the Consulate-General of Japan in Seattle or visiting their website. Be sure to apply well in advance to avoid any last-minute complications.
  • Consider airlines like Alaska Airlines and ANA (All Nippon Airways) to reduce your carbon footprint while flying from Seattle to Osaka. Alaska Airlines is committed to sustainability initiatives, including reducing emissions and investing in more fuel-efficient aircraft. ANA has also implemented various measures to minimize environmental impact, such as utilizing advanced technologies and biofuels.
  • Layovers are common when traveling from Seattle to Osaka. Airlines like United Airlines and Korean Air often offer flights with layovers in cities such as San Francisco, Los Angeles, or Seoul. Use this opportunity to explore the layover city or take a break before continuing your journey.
  • Each airline has its own baggage policy when flying from Seattle to Osaka. Delta Airlines allows one free checked bag for economy class, while Japan Airlines permits two. ANA also allows two free checked bags, whereas Alaska Airlines has a more flexible policy with a weight-based system. Familiarize yourself with the specific baggage allowances and any additional fees to avoid surprises at the airport.

Reviews of the top 5 airlines serving from Seattle to Osaka

 
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 Osaka? 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.
8.4
ANAOverall score based on 996 reviews
8.7Crew
8.6Boarding
7.8Food
7.9Entertainment
8.2Comfort
Airline reviews

They lost my luggage on the inbound flight and then lost it again on this flight. I called online travel agent to change earlier flight to get a longer layover in Vancouver but ANA denied it

2.0 MediocreAnonymous, Oct 2025YVR - HND
Read more ANA reviews

They lost my luggage on the inbound flight and then lost it again on this flight. I called online travel agent to change earlier flight to get a longer layover in Vancouver but ANA denied it

Suite lounge in Honolulu is very exclusive and boarding from the lounge into the plane is unique. First suites were huge and comfortable. Japanese meal is like a high end omakase meal. All the staff were very kind and provided sophisticated service. Fast Track upon landing was appreciated but not needed this time because immigration was so empty and easy.

I like the service very much. The food just okay but maybe different culture who like, who don't like.

Everything was excellent. Only the fish entree in the Japanese meal was overcooked and quite dry but everything else was great

Great first time experience on this airline. Very professional staff and great service.

Warm the bread. Movies: better choices to include Chinese movies options or some of the older winners of flim festival

I was able to change my flight last minute. It was more expensive, but that was my fault. Thank you for allowing me to fly!

Business class on ANA was awesome. There lie flat seats made it easier to sleep on a 12 hour flight. Food was great and service was excellent.

The crew was very nice and polite. They made sure everybody got their meal and drinks. Even the economy class had a very adequate leg room for someone that is over 6 foot tall.

Overall it was good. Making changes to the reservation on ANA’s website was little challenging. Would like to see those features improved in the future.

Flight crew was fantastic. The aircraft was meticulously cleaned at all times. The crew was continuously checking to see if the passengers were ok.

They were trying to get people to check luggage because the over head compartments were full but when we boarded there were lots of empty places that people could have put the luggage.

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

Friendly flight attendants and gate agents. Very clean plane and food was good!

Plane took off on time and I had the whole row to myself!

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Not many people, so you can lay down on two seats

The delay in Korea was a pain and set us back a day. I have to give big props to Korean Air for setting up a hotel with dinner and transportation to and from the hotel. I also needed assistance with a wheelchair and they did an outstanding job.

I traveled business class from Lax to Narita flight Jl61. The crew was attentive and polite. Food was good quality and service was as it should be. Narita to Bengaluru Jl753was another story in business class. The cabin was darkened for the 9hr:30min flight, food was mediocre, service was below standard and crew can't speak English to save their lives. When you ask for noodles soup from Ala carte they gave cup of noodles while Lax to Narita i was served the best Ramen noodles in a big bowl. Why the disparity on this leg of the journey.....or is it because there were mostly Indian passengers and it really did not matter to Jal to bother as its a poor country and Indians refrain from speaking up? A good airline but differentiation like this brings their reputation and business down.

put me in front row, screen was tiny, movie slection wasnt very good will be flying back on another airlines

Japan Airlines was excellent as usual once on the plane. Cabin crew was wonderful as usual. Boarding was solid on the Honolulu leg. For Thai Airways the boarding was less organized. I was in an earlier group but they weren’t clear with the numbers or instructions. Flight crew from Japan to Thailand was very good.

Terrible. Our flight was delayed by 15 hours. We lost a full day of our vacation.

highly recommend for trip to japan only reason why i gave good not excellent is because their selection of movies and tv shows in English is more limited .

We asked for Hindu vegetarian meal in advance and the quality of the food was horrendous. Never flying JAL again!

Japan airline is excellent service .I recommend to Kayak and Japan airline to Frend.

Overall a great experience. One complain was the vegetarian food that my wife had which was mostly boiled vegetables with not much flavor.

Very accommodating and kind airline crews. The plane is also big which makes the passengers more comfortable and relax

I actually didn’t make it onto the flight. I spent quite a few hours trying to rebook the flight just to get screwed out of $5000. Fun!

Better screens, it would have been nice to have more comfortable seats.

2nd major delay due to maintenance issues. 1st delay missed my connecting flight.

Very clean ,flight attendants very professional,nice , Boarding was very easy

The plane hasnt left im stuck in seatle still my flight has been grounded for almost 5 hours

My luggage didn’t arrive with my flight. Flight was delayed by nearly 2 hours while we sat on the plane and I almost missed my connecting flight and subsequently missed the last train from the airport so it took me another 2 hours to get to my destination after arriving, Crew skipped me several times when offering beverages, and I couldn’t get their attention at times because they wouldn’t even make eye contact with me. They didn’t give me a form for disembarking so I had to go to the back of the line after waiting an eternity for immigration. Paid for on flight wi- fi that didn’t work for most of the flight.

Love flying Asiana. Been using it for over a decade now.

Coming back to America was a peaceful flight everyone and everything was perfect

I had a bad experience coming from America to Thailand. On my connecting flight my check in suitcase was not put on the departing aircraft, I received my suitcase 24 hours after arriving in Bangkok and when I open my luggage my hand swelled up. The next morning when I put on an outfit from my suitcase my face swelled up and became numb. My entire vacation was ruined it seems that some kind of chemical was sprayed into suitcase and ruined my clothes and got me sick. The staff at my hotel called the airline and spoke to someone and they told me to file a complaint and gave my a website to do so. I did not file a complaint I felt like it would have fell on death ears. I had to throw away my brand new vacation clothes and suitcase and I had the worst vacation ever due to this happening to me.

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.

Snacks were just placed and many people were hungry and unaware they were available. Ran out of water bottles. Attendants not available. Missed entire meal.

The cabin crew was professional and there were plenty of movie choices, but the food was a bit sub-standard.

The flight was delayed an hour, but not because of Air Canada. The crew was polite, professional, and competent. The food was above average for Air Canada, but just fine. The stand out for me in the 10 hour flight was the entertainment package. The best of any airline I’ve experienced so far. Looking forward to my return flight to finish some more of the shows I was watching.

Very good!👍!especially the typhoon coming, the speaking Chinese language service is excellent 👍!

They could care less about you. Just under a 4 hour delay in Seattle, leading into a missed connection in Vancouver, which led to 2 more delays that added up to 3 more hours leaving us to have to sleep on the floor of the Toronto airport cause they don't help you find accomodations and they just book you on the next flight out. Took an additional 14 hours to get home. Always given the brush off to get rid of us. Worst airline ever

Not to out myself as both a child at heart and kind of a terrible person, but the Pokémon safety video was the first time I watched an airplane safety video in like a decade. It was ADORABLE!! A great way to encourage attention from young and old alike.

Seamless! Long but the seat back entertainment kept us all busy the whole time! Meals were excellent! Crew fantastic! Very attentive!

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

Everything you need to know for your flight from Seattle to Osaka

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