SEA - OSA

$416 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 8/3. 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
$855
Typical prices: $837-$728
Hainan Airlines
Sat 9/19Mon 10/19
SEA - KIX • 1 stop
Cheapest one-way
$416
Typical prices: $404-$439
Multiple Airlines
Mon 8/3
SEA - KIX • 3 stops
Top airlines
Cheapest • from $855 (round-trip)
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Seattle and Osaka. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $516 (round-trip)
Shortest trip • 13h 41m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 15% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 28% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Osaka!
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, Sep 19 - Mon, Oct 19
Hainan Airlines Logo
11:00 am - 12:45 pm
SEA
-
KIX
33h 45m
1 stop
Hainan Airlines Logo
2:20 pm - 9:00 am
KIX
-
SEA
34h 40m
1 stop
$855Hainan Airlines
Tue, Sep 15 - Tue, Sep 22
Cathay Pacific Logo
12:25 pm - 9:15 pm
SEA
-
KIX
40h 50m
1 stop
Cathay Pacific Logo
5:35 pm - 10:05 am
KIX
-
SEA
32h 30m
1 stop
$862Cathay Pacific
Tue, Sep 15 - Tue, Sep 22
Cathay Pacific Logo
12:25 pm - 6:40 am
SEA
-
KIX
26h 15m
1 stop
Cathay Pacific Logo
6:30 pm - 10:05 am
KIX
-
SEA
31h 35m
1 stop
$872Cathay Pacific
Sun, Sep 6 - Mon, Sep 21
Air Canada Logo
5:45 am - 7:10 pm
SEA
-
ITM
21h 25m
2 stops
Air Canada Logo
2:00 pm - 2:22 pm
ITM
-
SEA
16h 22m
2 stops
$1,014Air Canada
Wed, Jul 15 - Fri, Jul 24
Japan Airlines Logo
1:25 pm - 7:50 pm
SEA
-
ITM
14h 25m
1 stop
Japan Airlines Logo
2:30 pm - 10:50 am
ITM
-
SEA
12h 20m
1 stop
$1,037Japan Airlines
Tue, Sep 1 - Tue, Sep 8
Air Canada Logo
7:20 pm - 6:55 pm
SEA
-
ITM
31h 35m
2 stops
Air Canada Logo
2:00 pm - 6:32 pm
ITM
-
SEA
20h 32m
2 stops
$1,038Air Canada
Sun, Jul 26 - Tue, Aug 11
Japan Airlines Logo
1:25 pm - 7:45 pm
SEA
-
ITM
14h 20m
1 stop
Japan Airlines Logo
11:25 am - 10:50 am
ITM
-
SEA
15h 25m
1 stop
$1,042Japan Airlines
Tue, Oct 13 - Fri, Oct 23
ANA Logo
4:30 pm - 9:45 pm
SEA
-
UKB
13h 15m
1 stop
ANA Logo
7:05 am - 2:25 pm
UKB
-
SEA
23h 20m
1 stop
$1,072ANA
Tue, Sep 1 - Tue, Sep 8
ANA Logo
4:30 pm - 9:45 pm
SEA
-
UKB
13h 15m
1 stop
ANA Logo
9:15 pm - 2:25 pm
UKB
-
SEA
33h 10m
1 stop
$1,074ANA
Mon, Oct 26 - Fri, Oct 30
Korean Air Logo
12:00 pm - 10:10 am
SEA
-
UKB
30h 10m
1 stop
Korean Air Logo
11:10 am - 10:00 am
UKB
-
SEA
14h 50m
1 stop
$1,091Korean Air
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.

How much is a round-trip flight from Seattle to Osaka?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Osaka departing in September.

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 March, where tickets cost $363 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $718 and $651 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 4 weeks before departure, which saves you about 15% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$416
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly and prices are also 9% 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 5 days, the lowest price for a flight from Seattle to Osaka was $416 for a one-way ticket and $855 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, 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, 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 $1,329 and an overall rating of 8.9, STARLUX Airlines is the most popular choice. Korean Air is also a great choice for the route, with an average price of $769 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
Korean AirOverall score based on 1218 reviews
8.2Entertainment
8.1Food
8.7Crew
8.3Comfort
8.5Boarding
Airline reviews

AAAAHHHH... It was shocking in a very positive way, the attention to detail, the courtesy, the manners of all personnel on board, the constant honest smiling. You can see and feel they take pride in all they do no matter how trivial. The plane in general was very comfortable. I can't wait to do it again

8.0 ExcellentCarlos J, Apr 2026
TPA - ATL
Read more Korean Air reviews

AAAAHHHH... It was shocking in a very positive way, the attention to detail, the courtesy, the manners of all personnel on board, the constant honest smiling. You can see and feel they take pride in all they do no matter how trivial. The plane in general was very comfortable. I can't wait to do it again

The boarding process was efficient and quick. The seats were comfortable. The food was good. The service was excellent. We had a lovely flight from Seattle on Korean air

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

It was good overall. What I liked most was the restrooms. Compared to other airlines, the restrooms seem larger and look clean. The seats also look clean. The attendants are nice, except one time during the flight. I was sitting on aisle and a man sitting window. He asked an attendant for a snack. She told him to go ahead and get some snack from the section with food storage (I am not sure how it is called). So, I had to get up to let him get out from his seat. Why she did not bring him some snacks so that I would not have to move, I do not know... I was kind of surprised how inconsiderate the attendant was.

JOKE of a company with the most Ridiculous policies. JAL is amazing, KAYAK/UNDERPRICER is the worst company I have ever dealt with, NEVER AGAIN

Overall, a solid flight experience. Boarding was quick and efficient, even with a full and overbooked flight. The flight crew did a great job providing attentive and friendly service throughout. I flew in economy, and while the seats were acceptable, they could definitely use more cushioning, especially for a 14-hour flight. By the end, it was quite uncomfortable to remain seated. Legroom was also limited, particularly with a bag stored under the seat and the passenger in front reclining. That said, everything else went smoothly, and I appreciated the professionalism of the crew.

The flight was delightful overall. The check-in and boarding were on smooth and on time. Amenities and staffs were elevated. However, if glasses were served instead of cups, there should be a complete premium.

Sure I would’ve liked a little more space, but it was better than economy. I bring my own food because I have food allergies it would be nice if they offered larger salads or more vegetables instead of starch it was really a good flight. I don’t wanna complain. I’m grateful to fly at all safely. Thank you to the pilots.

Flight crews are very attentive and polite. Cabin and toilets are clean. Food is above average for economy class. We missed our connecting flights because the first flight was delayed, the ground crews at Tokyo were very helpful, providing all the information and support (including cash for our train ticket) to get us to our destination. Very impressive. No wonder they are always at the top ten lists.

No food at all so it was a bit of a culture shock for international travellers with connecting domestic flights.

Excellent! So happy that the crew members were so helpful and friendly and able to understandably communicate. They’re very receptive with someone like me, with disability. I love that I did not even have to ask for luggage help like, having to place and take down my carry-on luggage in and out of the over-head compartment. Hope, help is extended to disabled passenger(s) through out class classifications they’ve bought; economy or business class it might be. As a disabled person myself, I’m truly of great appreciation of this kind of help. Means a lot !!! Thank you so very much JAL crew. You out done others on this customer service part of the trip. Please continue to do so. From now on, I’ll choose JAL as my airline whenever I have to fly to any southeast asian countries. And I will disseminate my excellent travel experience with you to others.

American Airlines food is horrible. Also, paid to fly JAL on all segments, but received a much lower quality. I was disappointed to learn that we would be using American Airlines on this flight, which has less comfort, entertainment, choices, and lower standard of service. Overall not satisfied.

Food was very mediocre. Economy is pretty uncomfortable. Crew was excellent and responsive.

I thought I bought the ticket directly through Kayak not a 3rd party

I like that we made it faster than regularly scheduled. Everything else was poor. The boarding was slow and chaotic. One person was screaming instructions to people that didn’t understand and there was only one camera so boarding was slow. The crew was not very friendly and one stewardess was extremely rude to everyone the entire flight. The food was not good and not themed to the country we were going to like every international flight I’ve taken. Lastly the seats were awful. After this flight I would never recommend United and will actively avoid booking another flight through them.

When I checked in, it printed two bag tags. The helper said they would cancel the other. They canceled both and my bag was left behind

It was really fast to Tokyo. Much faster than the budget carriers. However a lot less space than international flights.

The ladies are great seats should be a little bigger!

Couple of hours delayed, we had to re-booked our Shinkansen reservation twice. United Aiines need to improve their time!

The check-in started 3 minutes early; there were people lining up a half hour before. I was third, and I got checked in and passes in hand for my connection as well; I walked away from the desk one minute before it was even supposed to be open. Amazing. That said, the food on the first leg of my trip was not good, and I didn’t finish it. Second leg, it was tasty. You get a cup of Häagen-Dazs after dinner. The staff were polite and helpful. Will use again.

Crew was fantastic. Seats were not completely lay flat but still comfortable to watch a show. International food was lobster which was very big but a little tough. The scallop appetizer was delicious. Loved the individual air conditioning vent at each seat. Flight overall was very smooth and very good.

Staff was friendly but couldn't find way to track them down during flight. Food tried to be gourmet but was just too unusual. Business class seats were hard. Even sitting on the pillow, was still painful. Have to give them credit for on-time flights and decent gate area.

Flight was excellent. Transfer from one airport to another airport for a connecting flight was difficult and stressful.

Smooth sailing trip, pilots are good. Less amount of food offered but the quality is okey.

Humm, I should have known that the seat I peaked on my flight from Inchon to Manila was designed for a toddler or very small person.

The staff hold my luggage to steel and exchange my stub, i was very disappointed.

Kayak uses scammer sites to steal money from their victims.

Kayak along with airfare assay are attempting to steal my money. Charges are being pressed.

Customer service and attention to details. The food was good.

Food could be better it was okay. Entertainment seems dated it was something but in this day and age could be a lot better.

I’d have rated Asiana good except an unfortunate incident in which I felt one of your employee didn’t really help us. During the first leg of the trip, the flight from LAX to ICN, I left my backpack on the plane. When I realized, I reported to one of your employee who promised me that it’d be taken care of, that my backpack will be there at HCM city. When we arrived there, HCM people had no idea and my backpack was still at Incheon airport who denied any knowledge whatsoever. I was left in the cold and felt helpless. I was very disappointed. I’d like someone to look into this and let me know.

I am thankful that I was able to fly using Asiana

It was my first time flying Asiana but i was very pleased with how professional and understanding the flight crew is with little kids. One flight attendant held my 3 year old daughter’s hand guiding her to the exit after landing while i had my hands full with luggage and my infant. She was very helpful.

Didnt make it on flight. Flight was delayed. Then had to get rebooked for a flight that was 8 hours later. Guess who had to wait for 8 hours at the airport?

The Air Canada AC1 flight from Toronto to Tokyo on May 16 was great overall. Service, crew, food and entertainment were all excellent and everything ran smoothly. We had emergency exit seats so legroom was amazing, but the seats themselves weren’t very comfortable and the plane feels like it could use an upgrade for a long-haul flight. Aside from that, everything else was perfect.

All good……but luggage didn’t make it on the airplane. Had to wait 3 days. Was a bummer.

Small suitcase used for carryon the last time was refused by boarding crew this time. Appears to be at the discretion and mood of the person on the day. Flight was only half booked, there would have been no problem with space.

The plane was very cramped to point there was no way not to touch person beside you and a stewardess screamed at my son when I touched her arm to get her attention to let her know she forgot to give him his dinner when she passed him and gave a dinner to passenger behind him. Very inappropriate response and She never came back to apologize and other stewardess said she was sorry “if I felt” she was inappropriate. Horrible experience and she should be reprimanded for her behavior

Everything went smoothly — on-time departure and very organized boarding. We pre-ordered vegan meals, which were fine but not especially memorable. We may have had slightly higher expectations given it was a Japanese airline. It felt like a dinner meal than a breakfast. Overall, it was a good flight experience and we would recommend it.

This flight with a lot empty place , and I have more room, feeling comfortable.

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.

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

Information on your arrival and departure airports