OSA - SEA

$439 Find Cheap Flights from Osaka to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Osaka to Seattle departing on 9/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Osaka to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Osaka to Seattle, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Osaka to Seattle (OSA-SEA)

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

Tue, Sep 23 - Mon, Sep 29
 Logo
12:35 pm - 12:30 pmKIX-SEA
15h 55m1 stop
 Logo
2:15 pm - 5:50 pmSEA-KIX
35h 35m1 stop
Tue, Sep 23 - Thu, Sep 25
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12:35 pm - 12:30 pmKIX-SEA
15h 55m1 stop
 Logo
2:15 pm - 5:50 pmSEA-KIX
35h 35m1 stop
Thu, Sep 25 - Sat, Sep 27
Asiana Airlines Logo
10:50 am - 12:30 pmKIX-SEA
17h 40m1 stop
Asiana Airlines Logo
2:15 pm - 9:40 amSEA-KIX
27h 25m1 stop
$720Asiana Airlines
Find Deal
Wed, Sep 24 - Sun, Sep 28
Asiana Airlines Logo
10:50 am - 12:30 pmKIX-SEA
17h 40m1 stop
Asiana Airlines Logo
2:15 pm - 5:50 pmSEA-KIX
35h 35m1 stop
$757Asiana Airlines
Find Deal
Tue, Sep 23 - Sun, Sep 28
China Airlines Logo
2:00 pm - 7:20 pmKIX-SEA
21h 20m1 stop
China Airlines Logo
1:10 am - 12:00 pmSEA-KIX
18h 50m1 stop
$814China Airlines
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Thu, Sep 25 - Thu, Sep 25
China Airlines Logo
7:05 pm - 7:20 pmKIX-SEA
16h 15m1 stop
China Airlines Logo
1:10 am - 6:05 pmSEA-KIX
24h 55m1 stop
$855China Airlines
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Fri, Sep 12 - Thu, Sep 18
EVA Air Logo
1:10 pm - 7:30 pmKIX-SEA
22h 20m1 stop
EVA Air Logo
12:30 am - 10:10 amSEA-KIX
17h 40m1 stop
$886EVA Air
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Sat, Aug 30 - Fri, Sep 12
EVA Air Logo
11:10 am - 7:50 pmKIX-SEA
24h 40m1 stop
EVA Air Logo
1:30 am - 10:10 amSEA-KIX
16h 40m1 stop
$906EVA Air
Find Deal
Wed, Aug 20 - Wed, Sep 3
ANA Logo
6:00 pm - 2:25 pmITM-SEA
12h 25m1 stop
ANA Logo
4:30 pm - 9:05 amSEA-ITM
24h 35m1 stop
$1,637ANA
Find Deal
Tue, Oct 14 - Sat, Oct 18
ANA Logo
4:50 pm - 2:25 pmITM-SEA
13h 35m1 stop
ANA Logo
5:31 pm - 6:55 pmSEA-ITM
33h 24m2 stops
$1,663ANA
Find Deal
Booking Insights

KAYAK's insights & trends for Osaka to Seattle flights

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

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

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

For Osaka to Seattle, Thursday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Seattle back to Osaka, the best deals are generally found on Thursday, with Sunday being the most expensive.

Good to know

Low seasonMay
Cheapest flight$439
Best time to beat the crowds with an average 45% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from Osaka Kansai Intl to Seattle

When to book flights from Osaka to Seattle

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

  • What is the cheapest flight from Osaka to Seattle?

    In the last 3 days, the lowest price for a flight from Osaka to Seattle was $439 for a one-way ticket and $687 for a round-trip.

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

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

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

    Osaka has 2 major airports: Osaka Itami and Osaka Kansai Intl. Seattle/Tacoma Intl is the only airport in Seattle. You’ll usually find the cheapest deals if you fly from Osaka Kansai Intl.

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

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

  • Which airline alliances offer flights from Osaka to Seattle?

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

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

    The two airlines most popular with KAYAK users for flights from Osaka to Seattle are EVA Air and ANA. With an average price for the route of $955 and an overall rating of 8.4, EVA Air is the most popular choice. ANA is also a great choice for the route, with an average price of $1,093 and an overall rating of 8.4.

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

    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 Osaka to Seattle.

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

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

    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 Seattle with an airline and back to Osaka with another airline.

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

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

Reviews of the top airlines flying from Osaka to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Osaka to Seattle. 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 Osaka to Seattle? 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
EVA AirOverall score based on 1222 reviews
8.3Comfort
8.4Boarding
8.1Food
8.6Crew
8.0Entertainment
Airline reviews

EVA airlines was excellent: on time or early, safe, courteous crew. Highly recommended.

10.0 ExcellentAnonymous, Jul 2025TPE - JFK
Read more EVA Air reviews

EVA airlines was excellent: on time or early, safe, courteous crew. Highly recommended.

EVA! What is going on with your food!?!? Pre pandemic I used to go to Taiwan at least twice a year and always flew EVA — the food was consistently tasty for airplane food. Post pandemic, it’s not great at all. Step it up!

Flight Attendants could have been nicer and food portions could be bigger.

I have never heard of EVA air before but I am so happy my wife and I were able to flight on their planes twice. Everything on these flights just felt better than their competitors. As someone with longer legs any bit of extra leg spaces is appreciated. The different options for food and drinks were also a plus. They were extra careful to make sure my wife's eating restrictions were taken care for. They had a before take off and landing announcements on the built in tablets for each seat and it gave out information that was very helpful. Such as what and how to declare your items in the specific country you landed in, any odd items that may be illegal to bring it (and even the reasoning why) and any other information you might need to make your post flight experience better. Oh and the seats were more comfortable, had more ability to lean and the headrest was much better for flight sleeping. The only downside was there were "forced" ads on the tablet at take off for maybe 5-10 minutes but honestly, this flight was the cheapest option and had all the benefits listed above that is such an easy trade off. Im keeping an eye out for EVA air going forward.

I have never heard of EVA air before but I am so happy my wife and I were able to flight on their planes twice. Everything on these flights just felt better than their competitors. As someone with longer legs any bit of extra leg spaces is appreciated. The different options for food and drinks were also a plus. They were extra careful to make sure my wife's eating restrictions were taken care for. They had a before take off and landing announcements on the built in tablets for each seat and it gave out information that was very helpful. Such as what and how to declare your items in the specific country you landed in, any odd items that may be illegal to bring it (and even the reasoning why) and any other information you might need to make your post flight experience better. The only downside was there were "forced" ads on the tablet at take off for maybe 5-10 minutes but honestly, this flight was the cheapest option and had all the benefits listed above that is such an easy trade off. Im keeping an eye out for EVA air going forward.

Sub sandwhich for a snack through mid flight and giving a bottle water was a good idea

The flight attendants should be nicer, on my first flight I told them I’d prefer a veggie meal sometimes and then she began to lecture me about it, it was a late flight and I wanted an easy digestion meal so that I can sleep quickly. The meals were abit odd, breakfast on my last flight had eggs, oatmeal and fish, did not taste good at all, strange combination. The economy seats are very tight and crowded, not comfortable at all. Overall for the price I paid I thought I was going to get more.

seats are pitched well. you don't feel too tight.

For the price, it was better than other airlines; quality of food and service was very good.

Movie selection was not as good as recent flights I've taken (EVA and other airlines).

Purchased WiFi was slow to non functional. Staff was not personable or friendly. Seats were cramped. Boarding took long but I expected that.

The crew was excellent. The flight was delayed for 20 to 25 minutes. We did arrive a bit later than expected. The AC could have been better.

Very disappointed with the seat selection. During the booking, I selected seats such that my wife and I would sit next to each other. However, during check-in, we found out that the airline changed our seats and we were seated apart; and I was stuck in the middle seat with two strangers. Very disappointing experience. We would not fly ANA next time.

Luckily I just tried to sleep. But the entertainment system was awkward to operate. I hate all this stuff with apps and adding it to your phone and all. It is a nuisance. I would prefer a good magazine or newspaper in the pocket in front of me or available.

Upgrade the comfort, food and attendants. Also we arrived in Houston in the morning. The meal they served two hours before our arrival was a dinner entree. It would have been a lot nicer and much more appropriate to have had breakfast.

Every leg of the flight was late causing us to miss our flight to Okinawa and have to take the next flight out.

Wonderful I would recommend it to fly & ride with ANA.

Poor. We weren’t able to check in online (for several hours until we gave up) for no apparent reasons although our passports were loaded successfully. When we were at the airport check-in, a rep helped us at the kiosk but she disregarded the KTN provided to her so we had to come back for it after being questioned by the TSA person…

Flight delayed by one day and everything was so disorganized by the airline.

All the food seemed to have onions. I don't eat onions. Anyway, everything else was great. The biggest downside was the underpricer company that purchased the tickets from ANA. Underpricer never provided the United Airlines booking number. ANA was a code share and all our flights were on United. I finally was able get booking numbers from Ujuted on X. They saved me from the upsales underwriter tried to saddle my wife and me with.

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

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