OSA - SEA

$377 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 5/8. 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 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$635
Multiple Airlines
Mon 4/20Mon 4/27
KIX - SEA • 1 stop
Cheapest one-way
$377
Typical prices: $487-$574
Multiple Airlines
Fri 5/8
KIX - SEA • 2 stops
Top airlines
Cheapest • from $768 (round-trip)
Best reviews • 8.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Osaka and Seattle. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $805 (round-trip)
Shortest trip • 12h 14m (one-way)
Insights
Insights
Insights
Insights
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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 Seattle!
Flight Deals
Booking Insights
Flight 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

Mon, Apr 20 - Mon, Apr 27
Multiple Airlines Logo
2:15 am - 2:55 pm
KIX
-
SEA
28h 40m
1 stop
Multiple Airlines Logo
12:55 am - 10:40 pm
SEA
-
KIX
29h 45m
1 stop
$635Multiple Airlines
Thu, Apr 30 - Thu, May 7
Multiple Airlines Logo
2:15 am - 2:55 pm
KIX
-
SEA
28h 40m
1 stop
Multiple Airlines Logo
12:55 am - 9:00 am
SEA
-
KIX
16h 05m
1 stop
$659Multiple Airlines
Tue, Sep 1 - Mon, Sep 7
EVA Air Logo
6:30 pm - 7:00 pm
KIX
-
SEA
16h 30m
1 stop
EVA Air Logo
1:30 am - 10:10 am
SEA
-
KIX
16h 40m
1 stop
$768EVA Air
Tue, Jun 23 - Wed, Sep 16
Delta Logo
9:05 am - 1:25 pm
KIX
-
SEA
20h 20m
1 stop
Delta Logo
1:00 pm - 10:40 pm
SEA
-
KIX
17h 40m
1 stop
$788Delta
Mon, Jun 22 - Wed, Sep 16
Delta Logo
2:15 am - 1:25 pm
KIX
-
SEA
27h 10m
1 stop
Delta Logo
1:00 pm - 10:40 pm
SEA
-
KIX
17h 40m
1 stop
$791Delta
Tue, Apr 28 - Tue, May 5
Air Canada Logo
6:00 pm - 9:38 am
KIX
-
SEA
31h 38m
1 stop
Air Canada Logo
2:55 pm - 4:25 pm
SEA
-
KIX
33h 30m
1 stop
$817Air Canada
Thu, Apr 23 - Tue, Jul 14
Air Canada Logo
6:00 pm - 9:38 am
KIX
-
SEA
31h 38m
1 stop
Air Canada Logo
7:20 pm - 4:25 pm
SEA
-
KIX
29h 05m
1 stop
$829Air Canada
Tue, Apr 21 - Tue, Apr 28
Multiple Airlines Logo
7:35 am - 4:45 pm
KIX
-
SEA
25h 10m
2 stops
Multiple Airlines Logo
11:45 am - 3:10 pm
SEA
-
KIX
35h 25m
1 stop
$849Multiple Airlines
Tue, Jun 23 - Tue, Sep 15
EVA Air Logo
11:10 am - 8:13 am
KIX
-
SEA
37h 03m
2 stops
EVA Air Logo
1:30 am - 12:10 pm
SEA
-
KIX
18h 40m
1 stop
$850EVA Air
Mon, Apr 13 - Mon, Apr 20
Asiana Airlines Logo
12:15 am - 2:55 pm
KIX
-
SEA
30h 40m
1 stop
Asiana Airlines Logo
12:55 am - 6:30 pm
SEA
-
KIX
25h 35m
1 stop
$851Asiana Airlines
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.

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

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

Good to know

Low seasonMay
Cheapest flight$377
Best time to beat the crowds with an average 42% drop in price.
Most popular time to fly and prices are also 9% lower on average.
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 $377 for a one-way ticket and $635 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?

    Star Alliance is the only airline alliance operating flights between Osaka and Seattle.

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

    The two airlines most popular with KAYAK users for flights from Osaka to Seattle are STARLUX Airlines and ANA. With an average price for the route of $816 and an overall rating of 8.9, STARLUX Airlines is the most popular choice. ANA is also a great choice for the route, with an average price of $1,065 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.
8.9
STARLUX AirlinesOverall score based on 285 reviews
9.2Crew
8.8Entertainment
8.7Food
9.0Boarding
8.9Comfort
Airline reviews

Got dinner and breakfast! They had mahjong game in entertainment system. Current movies. Loved the slippers, sleeping mask packet. Great experience for a long flight

10.0 ExcellentAnonymous, Mar 2026
TPE - LAX
Read more STARLUX Airlines reviews

Got dinner and breakfast! They had mahjong game in entertainment system. Current movies. Loved the slippers, sleeping mask packet. Great experience for a long flight

Leg room was great. Friendly crew. Food is great. Crew always kept the toilet clean.

Excellent. Airline was very clean, staff was excellent, very professional. Economy seats were still large and comfortable. Meals were included and with good options. We were given a blanket and pillow as well as a comfort kit including an eye mask, ear plugs, and tooth brush. Would highly recommend.

Business Class is exceptional, from the lie flat seats to the wide range of food on board. Can’t wait for our next journey with Starlux!

Th tray was dirty when pulled it out. Still oily and food stains can clearly see last trip cleaner did not clean well. The toilet sink water did not drain quickly enough.

Majority of the movie entertainment loaded in the aircraft were quite old.

Crew is very attentive. Another new airbus 350-900 plane. Very modern.

Passengers were confused and freaking out coz the flight information wasn’t showing on the board that was running with all the departing flights. B9 gate was still showing Cathay Pacific bound for HK 15:50 was on until 22:07. STARLUX staff cameater but didn’t let the passengers go in to pre departure area until 22:45 for the 23:30 boarding time

The aircraft is fairly new. The screen is big and it's great to enjoy movies on a long haul flight. However, the food quality , and drink and snack selections, have room for improvement.

Preboarding food selection is an excellent idea. On the other end I did know the choice. People in my area know the choice. It ends with I got my meal till most of them are half way to finish their meal.

Everything about the flight was good or very good. The only bummer was that there was a 2 hour delay and that's not the fault of the airlines but it still takes away from the whole experience. The most amazing thing was that our bags got to baggage claim in record time! That was excellent!

Flight was late boarding. United crew were not friendly and cordial unlike the ANA crew.

Vegetarian options were not that great. However, the crew and service was awesome

The food was not great and the seats you need a little bit more space to put your things down around you: the blankets and toiletry bag were good. Flight was on time and bags etc no issues

Entertainment was good , comfort on airplane easy hoarding food and drinks was good and a friendly and good service of flight staff

The plane was very clean and the crew was very nice.

The lounge in Japan was busy and smaller. Have great choice of ramen.

Customer service was very good. Food was delicious. Wish the flight was longer.

I was good seat to keep stretch my legs . but couldn’t keep my bag in my hand . because they told me can’t keep my seat is no holder , because no seat fronts of us. wish I can put my leg on something higher. but instead of that everything goood.

Overall was a good experience. Crew members are nice and helpful.

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

Information on your arrival and departure airports