SEA - OSA

$313 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 3/22. 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.
Travelers love KAYAK
41.299.237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$585
Overall average: $716
ANA
Fri 2/27Sat 3/7
SEA - KIX • 1 stop
Cheapest one-way
$313
Typical prices: $382-$554
Philippine Airlines
Sun 3/22
SEA - KIX • 1 stop
Video guide: How to find cheap flights to Osaka
Watch video
Watch video
Watch video
Watch video
Top airlines
ANA
Cheapest • from $585 (round-trip)
ANA
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 35% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 22% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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

Fri, Feb 27 - Sat, Mar 7
ANA Logo
7:15 am - 4:40 pm
SEA
-
KIX
16h 25m
1 stop
ANA Logo
6:45 am - 1:20 pm
KIX
-
SEA
23h 35m
1 stop
$585ANA
Sat, Apr 18 - Thu, Apr 23
Air Canada Logo
8:00 pm - 4:25 pm
SEA
-
KIX
28h 25m
1 stop
Air Canada Logo
6:00 pm - 10:10 pm
KIX
-
SEA
20h 10m
1 stop
$602Air Canada
Sat, Apr 18 - Thu, Apr 23
Air Canada Logo
8:00 pm - 4:25 pm
SEA
-
KIX
28h 25m
1 stop
Air Canada Logo
6:00 pm - 10:10 pm
KIX
-
SEA
20h 10m
1 stop
$603Air Canada
Sun, Apr 12 - Mon, Apr 27
Asiana Airlines Logo
12:55 am - 9:40 am
SEA
-
KIX
16h 45m
1 stop
Asiana Airlines Logo
7:25 pm - 2:55 pm
KIX
-
SEA
35h 30m
1 stop
$623Asiana Airlines
Sun, Apr 12 - Mon, Apr 27
Asiana Airlines Logo
12:55 am - 9:40 am
SEA
-
KIX
16h 45m
1 stop
Asiana Airlines Logo
7:25 pm - 2:55 pm
KIX
-
SEA
35h 30m
1 stop
$624Asiana Airlines
Tue, Apr 14 - Tue, Apr 28
ANA Logo
8:00 pm - 4:25 pm
SEA
-
KIX
28h 25m
1 stop
ANA Logo
6:00 pm - 7:18 pm
KIX
-
SEA
17h 18m
1 stop
$631ANA
Fri, Feb 27 - Sat, Mar 7
ANA Logo
7:15 am - 4:40 pm
SEA
-
KIX
16h 25m
1 stop
ANA Logo
5:35 pm - 1:20 pm
KIX
-
SEA
12h 45m
1 stop
$633ANA
Wed, Feb 18 - Wed, Feb 25
Japan Airlines Logo
12:30 pm - 7:55 pm
SEA
-
ITM
14h 25m
1 stop
Japan Airlines Logo
2:40 pm - 9:55 am
ITM
-
SEA
12h 15m
1 stop
$634Japan Airlines
Fri, Feb 20 - Mon, Mar 2
Multiple Airlines Logo
9:55 am - 8:45 am
SEA
-
KIX
29h 50m
2 stops
Multiple Airlines Logo
7:25 pm - 3:01 pm
KIX
-
SEA
12h 36m
1 stop
$634Multiple Airlines
Wed, Apr 22 - Wed, Apr 29
Japan Airlines Logo
8:31 am - 7:50 pm
SEA
-
ITM
19h 19m
2 stops
Japan Airlines Logo
11:30 am - 4:17 pm
ITM
-
SEA
20h 47m
2 stops
$639Japan Airlines
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.

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 February.

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 January, where tickets cost $677 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,273 and $1,067 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 35% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$313
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly and prices are also 10% 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 $313 for a one-way ticket and $585 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?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Seattle and Osaka, with SkyTeam 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 $871 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 $862 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 1078 reviews
8.7Crew
7.9Entertainment
8.2Comfort
7.7Food
8.5Boarding
Airline reviews

Cabin Crew was excellent. They took care of everything requested. Flight was good

10.0 ExcellentAnonymous, Jan 2026
ORD - HND
Read more ANA reviews

Cabin Crew was excellent. They took care of everything requested. Flight was good

I didn’t know that my connecting flight from Japan to Hawaii was at a different airport - arrived in Haneda (ticket said Tokyo but didn’t notice the airport name) and had to get my bags and go out of immigration and back in to go to Narita airport 2 hours away. Such a hassle and SOOO confusing and complicated. Check your airports IN ADVANCE and NEVER book if you have to change airports. 40+ years of flying and first time had this. Never again. ANA is great but booking agencies will sell you a connection that you have a good chance of missing - even under the best circumstances.

I was charged $200 for a 2nd checked bag, which is unreasonably high and feels like price gouging. Other than that the experience was excellent.

The ROOM was great. We would love to have it on all of our flights. LOL

I would prefer to fly with Japanese airlines over American ones. They have better food and service overall

I was too late to get onto this flight. Kayak shouldn't let you book a connecting international to domestic flight when flying ANA. Your domestic flight could be in a different terminal and you won't make it because you have to go through immigration and customs.

United Airlines crew members do not know how to deal with emergency situation that caused our flight delay. For example, they should have asked the maintenance or seat belt repair personnel to come and fix the seat belt while they were looking for a volunteer to book another flight.

I always take ANA because of the great service and overall experience.

Tokyo Haneda to transport was so bad too short time . and find out way to the gate was so bad. I almost missed flight. because confused. They need more great way tell us how to get there details

Entertainment and food is best. I love to use ana for a lots japanese movies…. Food was best

Never had a flight delay issue with Korean Air, that's why I always go with this airline.

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

Korean air has a little bit more seating space than Asiana air.

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!

The flights were on time and the cabin crew were very nice. The only downside was that the food was not good.

Good pilot and crew. No food or beverage on this flight Entertainment is via own device thru plane's wifi.

My plans changed and I tried to cancel or change the flight for credit but was giving the run around and denied . Not great

Excellent service, excellent food and beverage options, plenty of leg room

Checking in as an international flyer is a bit tedious

I was so hungry , from Boston to Tokyo, only 2 big food .

It was okay, short flight so nothing much to comment.

The crew was nice, the food could be better, and at least 2 bathroom stalls were out of service.

The crew was attentive and provided everything I needed. The food in business class was excellent.

Good experience for economy transpacific. Reasonable comfortable seats. Food was not as good as I expected or had on other prior transpacific flights but likely attribute that to rising cost of supplies. Staff is courteous. Overall, very good.

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.

It was great, but my bag was not loaded onto the connecting flight. I'm currently getting it resolved. If this isn't a problem, everything else was excellent.

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.

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.

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

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.

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.

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

Information on your arrival and departure airports