SEA - OSA

$407 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 7/29. 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.
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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 Osaka

 
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.

Recent round-trip flight deals from Seattle to Osaka

KAYAK's recommended round-trip deals from the most popular airlines that fly from Seattle to Osaka.
Discover the best prices for you by selecting your travel dates on KAYAK.
Asiana Airlines Logo
2:15 pm - 7:20 pmSEA-KIX
37h 05m1 stop
Asiana Airlines Logo
8:40 pm - 12:30 pmKIX-SEA
31h 50m1 stop
$684Asiana Airlines
Find Deal
Mon, Sep 8 - Tue, Sep 23
Asiana Airlines Logo
2:15 pm - 5:50 pmSEA-KIX
35h 35m1 stop
Asiana Airlines Logo
10:50 am - 12:30 pmKIX-SEA
17h 40m1 stop
$704Asiana Airlines
Find Deal
Fri, Sep 12 - Thu, Sep 18
Air Canada Logo
5:30 am - 4:25 pmSEA-KIX
18h 55m1 stop
Air Canada Logo
6:05 pm - 10:16 pmKIX-SEA
20h 11m1 stop
$750Air Canada
Find Deal
Mon, Sep 15 - Mon, Sep 29
ANA Logo
7:00 am - 2:50 pmSEA-KIX
15h 50m1 stop
ANA Logo
5:30 pm - 2:25 pmKIX-SEA
12h 55m1 stop
$762ANA
Find Deal
Tue, Oct 7 - Sun, Oct 19
Air Canada Logo
7:15 pm - 4:25 pmSEA-KIX
29h 10m1 stop
Air Canada Logo
6:05 pm - 10:16 pmKIX-SEA
20h 11m1 stop
$790Air Canada
Find Deal
Thu, Oct 2 - Tue, Oct 7
ANA Logo
5:35 pm - 8:30 amSEA-KIX
22h 55m2 stops
ANA Logo
6:35 pm - 2:25 pmKIX-SEA
11h 50m1 stop
$807ANA
Find Deal
Mon, Sep 15 - Mon, Sep 29
China Airlines Logo
1:10 am - 12:50 pmSEA-KIX
19h 40m1 stop
China Airlines Logo
2:30 pm - 6:15 pmKIX-SEA
20h 45m1 stop
$946China Airlines
Find Deal
Mon, Sep 15 - Tue, Nov 18
China Airlines Logo
1:10 am - 12:50 pmSEA-KIX
19h 40m1 stop
China Airlines Logo
2:30 pm - 6:15 pmKIX-SEA
20h 45m1 stop
$947China Airlines
Find Deal
Mon, Sep 22 - Tue, Nov 11
Japan Airlines Logo
8:41 am - 7:45 pmSEA-ITM
19h 04m2 stops
Japan Airlines Logo
1:30 pm - 4:50 pmITM-SEA
19h 20m2 stops
$959Japan Airlines
Find Deal
Tue, Jun 3 - Tue, Jun 10
Japan Airlines Logo
8:41 am - 11:15 amSEA-KIX
34h 34m2 stops
Japan Airlines Logo
8:55 pm - 2:53 pmKIX-SEA
33h 58m2 stops
$969Japan Airlines
Find Deal
Tue, Jun 3 - Mon, Jun 9
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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 February, where tickets cost $897 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,515 and $1,208 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 6 weeks before departure. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Good to know

Low seasonJanuary
High seasonMarch
Cheapest flight$407
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly and prices are also 3% 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 $407 for a one-way ticket and $684 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?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Seattle and Osaka, with Star Alliance 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 $1,031 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 $1,057 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.

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.
8.3
Japan AirlinesOverall score based on 1464 reviews
8.2Comfort
7.8Entertainment
7.7Food
8.4Boarding
8.7Crew
Airline reviews

Extremely poor at handling baggage. I had oversized golf bag and JAL would not recheck in Boston. Had to haul by myself to Jet Blue. Both JAL and Jet Blue claimed I had overweight bag. Had to adjust baggage several times. Will avoid JAL in future and I always avoid Jet Blue when I can. QATAR always superior.

2.0 MediocreDaniel, Apr 2025BKK - NRT
Read more Japan Airlines reviews

Extremely poor at handling baggage. I had oversized golf bag and JAL would not recheck in Boston. Had to haul by myself to Jet Blue. Both JAL and Jet Blue claimed I had overweight bag. Had to adjust baggage several times. Will avoid JAL in future and I always avoid Jet Blue when I can. QATAR always superior.

JAL using the state of art A350-1000 for JFK to HND It’s a great plane to fly Very comfortable with lower cabin altitude Quieter cabin Wider seats Big tv screen Excellent service and catering

I fly to Asia twice a year for the last 15 years. I always try to fly JAL. It’s always a pleasant experience. Since TripCase shut down, this is the first time I used Kayak for live trip notifications. I was very pleased with Kayak’s quality and helpfulness of notifications. I will be using them going forward.

This flight was leg 2 of 2 leg journey. The staff at baggage re-drop in Tokyo were fabulous. Once at gate when time to board, had to take standing room bus to the tarmac to board. Did not like getting out to plane and having to wait 5 minutes until they opened bus door.

First experience with JAL so was okay to pretty good. 10 hour flight in premium select seat. . Seats in that category should be better than pretty good. Seat pan a little short for tall people but plenty of leg room; I think JAL in process of new planes? Also, — they could have offered a bit more water throughout flight and meals not the greatest. That said, certainly 200 percent better than a very recent AK Air International flight in similar cabin class in comfort and meals.

It's a domestic flight, but still the JAL quality shone through. The crew were polite and helpful and even prepared little gifts / souvenirs for the children on the flight, and everyone got a simple drink. The free wifi for entertainment on the personal device was also a great boon, and the shows surprisingly decent. Would recommend.

We ordered for non vegetarian Hindu meal but instead they served us vegetarian Hindu meal. That was also not good. It was very annoying and aggravating. Hope our return from Tokyo to jfk on March 27 same is not repeated. Caterar should understand difference between non vegetarian Hindu meal and vegetarian Hindu meal.

Allow gold card holders (Group 1) to board with their guest like other One World carriers do

Checked baggage process is confusing and time consuming especially when checking oversized bags. Very slow agents didn't help.

Food was great, Entertainment was bad, movies were not current and just did not have good variety. Granted I was tired so cranky might have played into my evaluation. Overall based on cost I definitely would fly them again. I am a million mile flyer on another airline, the service on JAL really beats all airlines.

Staff was so nice and very helpful with directions aswell!

Most relaxing long distance flight I have been on. And I have flown on many.

Not great, will likely try to fly another or maybe I should have upgraded my ticket? Needed Air…

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!

My ticket did not indication which group I was in for boarding; the gate attended help me

Very routh cabin crew food is only 2 meals for 13 hours fry with them They should get better training how to service good super routh language and talking with customer

staff are super nice and effiecient! It was a very comfortable and relaxing flight

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.

I was ordered vegetarian food, but didn't services to me :(

I did not take the flight, tried to cancel it right after I booked it, but was unable to reach anyone. I blame Kayak for this situation because they sent the booking through another company and I was unable to get anyone to talk to me about the situation. I had to just take the hit and pay for another flight through Cathay Pacific, which was wonderful. I will never use Kayak again. (I bet they don’t post this review!) I’ll just post about them on social media sites. I don’t want anyone to have to go through the hassle and expense I dealt with.

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.

There wasn't much entertainment for my short flight but the onboarding process was smooth and the crew provided wonderful service. The seats were also reasonably comfy. Great flight.

Cabin crew were excellent in taking care of my mom as she boarded the aircraft from her wheelchair. Did not care much for the food served.

Great airline all together - triple 7 for a short flight was a plus - lots of room

Wonderfully pleasant experience. Good meal and beverage selections. Professional air staff.

Seat width can be a bit wider. not nice that they charge extra for the window seats. online check in can be greatly improved. in other words, their online interface is bad.

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.

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.

Only process that my luggage didn’t make it to my destination because of short connection but I understand

The boarding process was good. The toilet could be better maintained.

This has been the worst experience I've ever had. We arrived to Ho Chi Minh Airport and were supposed to get our Asiana ticket from the transfer counter as we came with a different airline. However, the staff at the transfer counter were not helpful and kept giving us different information. We were first told by Asiana airlines staff we had to wait 2 hours so they could print out and give us our tickets, then someone else told us we had to wait 3hrs, someone told us "I don't know, just go sit and wait and we will tell you later." This was at a place in the Ho Chi Minh airport that had no coffee or food shops, nothing, just immigration (to enter Vietnam with a Vietnam Visa) and security (to transfer into the gates) but we needed our printed boarding pass to go through. It wasn't until we demanded to speak to a supervisor as our flight time was 1hr away because they kept telling us "there's alot of time left for your international flight, we will get your tickets later" we still had to wait around 20minutes for the "Supervisor" to give us our tickets. I would NOT recommend Asiana Airlines, especially if going thru Ho Chi Minh Airport as they are not helpful. (We almost missed our flight, due to their lazyness and incompetence of printing our tickets) I would suggest Asiana Airlines to have a Machine in the transfer area so passengers can easily print out their boarding passes themselves and save some money by not hiring incompetent staff that can't do a simple task such as printing a boarding pass.

Great service. They could offer vegetarian food and do more to reduce waste.

All was good except for the seats, not very comfy.

2.5 hour delay sitting in the plane on the tarmac, you tell me how the experience was

I hope these comments will find their way to AC customer experience team. Me and my spouse 50 years of aged coming back from 7 days perfect vacation... While boarding in FLL flight AC1621, one of the boarding agents (tall aged african american) man literelly yeld at my wife during the picture talking process. MAM ! STEP !! BACK !!! We are not illegal immegrants beying deported, nor are we in the millitary. We are customers returning home. This was unacceptable. While boarding in YYZ flight AC1154, one of the boarding agents (tall aged caucasian) man criticied with several complesant remarks my passport condition saying that I could not travel intl with it due to stain, decoloration, and BLOOD. My passport does not have blood on it! Yes it might be in less than perfect condition, but their are ways to talk to customer that does not imply not allow a boarding agent to be angry fathery like, or a custom agent looking at a suspicious individual. Both experience were less than acceptable for might I remind you a paying CUSTOMER returning home.

Short flight so no food or entertainment. Good landing at SFO and on time. We were told no carryon luggage yet lots of people were puting bags in overhead compartments. The rules need to be made more clear. I was on the first leg of an international flight and this is the first time I could not have carryon luggage.

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.

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