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Flights from Seattle to Osaka

Find flight deals from Seattle to Osaka for the next 3 months. Book one way flights from $415 or round trip flights from $843.

      • SEA 7:05 PM
        27h 45m
        1 stop
        KIX 2:50 PM
        Seattle - Osaka | Sat, Jul 18 | United Airlines
        KIX 4:55 PM
        15h 25m
        1 stop
        SEA 4:20 PM
        Osaka - Seattle | Thu, Jul 23 | United Airlines
        $843 $1,194
        28% off
        28% off
        $1,194 $843
      • SEA 5:15 AM
        17h 35m
        1 stop
        KIX 2:50 PM
        Seattle - Osaka | Fri, Jul 17 | United Airlines
        KIX 4:55 PM
        32h 27m
        1 stop
        SEA 9:22 AM
        Osaka - Seattle | Thu, Jul 23 | United Airlines
        $894 $1,194
        25% off
        25% off
        $1,194 $894
      • SEA 12:10 AM
        16h 50m
        1 stop
        KIX 9:00 AM
        Seattle - Osaka | Fri, Jul 17 | Asiana Airlines
        KIX 9:30 AM
        22h 15m
        1 stop
        SEA 3:45 PM
        Osaka - Seattle | Thu, Jul 23 | Asiana Airlines
        $997 $1,194
        16% off
        16% off
        $1,194 $997
      • SEA 12:10 AM
        16h 50m
        1 stop
        KIX 9:00 AM
        Seattle - Osaka | Sat, Jul 18 | Asiana Airlines
        KIX 10:30 AM
        21h 15m
        1 stop
        SEA 3:45 PM
        Osaka - Seattle | Thu, Jul 23 | Asiana Airlines
        $997
        16% off
        $1,194 $997
      • SEA 4:30 PM
        13h 15m
        1 stop
        UKB 9:45 PM
        Seattle - Osaka | Wed, Jul 15 | All Nippon Airways
        UKB 9:15 PM
        33h 10m
        1 stop
        SEA 2:25 PM
        Osaka - Seattle | Tue, Jul 21 | All Nippon Airways
        $1,058
        11% off
        $1,194 $1,058
      • SEA 4:30 PM
        13h 15m
        1 stop
        UKB 9:45 PM
        Seattle - Osaka | Thu, Jun 4 | All Nippon Airways
        UKB 11:55 AM
        19h 20m
        1 stop
        SEA 3:15 PM
        Osaka - Seattle | Sun, Jun 7 | Korean Air
        $1,093
        8% off
        $1,194 $1,093
      • SEA 5:15 AM
        17h 35m
        1 stop
        KIX 2:50 PM
        Seattle - Osaka | Tue, Jul 7 | United Airlines
        KIX 4:55 PM
        32h 27m
        1 stop
        SEA 9:22 AM
        Osaka - Seattle | Tue, Jul 14 | United Airlines
        $1,098
        8% off
        $1,194 $1,098
      • SEA 5:15 AM
        17h 35m
        1 stop
        KIX 2:50 PM
        Seattle - Osaka | Wed, Jul 8 | United Airlines
        KIX 4:55 PM
        22h 15m
        1 stop
        SEA 11:10 PM
        Osaka - Seattle | Tue, Jul 14 | United Airlines
        $1,098
        8% off
        $1,194 $1,098
      • SEA 4:30 PM
        13h 15m
        1 stop
        UKB 9:45 PM
        Seattle - Osaka | Thu, Jul 16 | All Nippon Airways
        UKB 9:15 PM
        33h 10m
        1 stop
        SEA 2:25 PM
        Osaka - Seattle | Tue, Jul 21 | All Nippon Airways
        $1,110
        7% off
        $1,194 $1,110
      • SEA 4:30 PM
        13h 15m
        1 stop
        UKB 9:45 PM
        Seattle - Osaka | Mon, Jul 13 | All Nippon Airways
        UKB 9:15 PM
        33h 10m
        1 stop
        SEA 2:25 PM
        Osaka - Seattle | Sat, Jul 18 | All Nippon Airways
        $1,110
        7% off
        $1,194 $1,110
      • SEA 1:00 PM
        17h 25m
        1 stop
        OSA 2:00 PM
        Seattle - Osaka | Thu, May 21 | Normal Airline
        OSA 3:00 PM
        6h
        Nonstop
        SEA 4:00 PM
        Osaka - Seattle | Sat, May 23 | Normal Airline
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      • SEA 4:30 PM
        23h 20m
        1 stop
        UKB 7:50 AM
        Seattle - Osaka | Wed, Jun 3 | All Nippon Airways
        $415 $470
        12% off
        12% off
        $470 $415
      • SEA 1:20 PM
        36h 25m
        1 stop
        UKB 5:45 PM
        Seattle - Osaka | Sun, Jul 12 | Korean Air
        $419 $470
        11% off
        11% off
        $470 $419
      • SEA 5:00 AM
        17h 50m
        1 stop
        KIX 2:50 PM
        Seattle - Osaka | Sun, Jul 12 | United Airlines
        $427 $470
        9% off
        9% off
        $470 $427
      • SEA 5:00 AM
        17h 50m
        1 stop
        KIX 2:50 PM
        Seattle - Osaka | Tue, Jul 14 | United Airlines
        $431
        8% off
        $470 $431
      • SEA 5:00 AM
        17h 50m
        1 stop
        KIX 2:50 PM
        Seattle - Osaka | Mon, Jul 13 | United Airlines
        $432
        8% off
        $470 $432
      • SEA 5:20 PM
        29h 30m
        1 stop
        KIX 2:50 PM
        Seattle - Osaka | Sat, Jul 11 | United Airlines
        $433
        8% off
        $470 $433
      • SEA 1:20 PM
        29h 35m
        1 stop
        UKB 10:55 AM
        Seattle - Osaka | Tue, Jul 14 | Korean Air
        $436
        7% off
        $470 $436
      • SEA 4:30 PM
        13h 15m
        1 stop
        UKB 9:45 PM
        Seattle - Osaka | Sun, Jul 12 | All Nippon Airways
        $436
        7% off
        $470 $436
      • SEA 1:20 PM
        16h 15m
        1 stop
        KIX 9:35 PM
        Seattle - Osaka | Sun, Jul 12 | Delta Air Lines
        $437
        7% off
        $470 $437
      • SEA 1:20 PM
        17h 20m
        1 stop
        KIX 10:40 PM
        Seattle - Osaka | Mon, Jul 13 | Korean Air
        $437
        7% off
        $470 $437
      • SEA 1:00 PM
        17h 25m
        1 stop
        OSA 2:00 PM
        Seattle - Osaka | Thu, May 21 | Normal Airline
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Displayed flight fares from Seattle to Osaka are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Trip.com price insights on flights from Seattle to Osaka

Which month has the cheapest one-way flights from to Osaka?

The average price of one-way flights from to Osaka purchased by Trip.com users by month over the past 12 months.

Based on Trip.com’s data, the cheapest month for flights from to Osaka is February, with an average price of $414; while the month with the highest flight price is usually June, with an average price of up to $923.

$923
$669
$414
$160
    Cheapest
  • $630
    May
  • $923
    Jun
  • $554
    Jul
  • $537
    Aug
  • $452
    Sep
  • $455
    Oct
  • $512
    Nov
  • $579
    Dec
  • $481
    Jan
  • $414
    Feb
  • $472
    Mar
  • $447
    Apr

When is the cheapest day to fly from Seattle to Osaka during Memorial Day?

Data is based on the lowest one-way price from Seattle to Osaka during Memorial Day on Trip.com in the past 3 days.

Memorial Day is scheduled for May 25. The cheapest flights from Seattle to Osaka are available on May 25, with fares starting at $672.

$1,493
$1,083
$672
$262
    Cheapest
  • $755
    21
    May
  • $752
    22
  • $1,493
    23
  • $728
    24
  • $672
    25
  • $763
    26
  • $808
    27

Frequently Asked Questions

  • What are the cheapest flights from Seattle to Osaka (SEA-OSA)?

    Based on Trip.com data, All Nippon Airways offers one-way fares as low as $415 on Cheapest nonstop routes (e.g. SEA to UKB on Wed, Jun 3), while United Airlines offers Cheapest nonstop round-trips from $843 departing on Sat, Jul 18 and returning on Thu, Jul 23.
  • At the moment, you can catch a nonstop flight from Seattle to Osaka with the following airlines, including: Alaska Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to Osaka is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Seattle to Osaka, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Wed, Jun 3, with one-way flights priced at just $415.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is All Nippon Airways.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Osaka travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Seattle to Osaka is September, when demand for travel is lower.
  • After crunching the numbers on our May flight calendar, it's currently cheapest to fly from Seattle to Osaka on May 19, 2026 with United Airlines, with prices starting at $429.
  • You can land at any one of the following hubs in Osaka, with Seattle-Tacoma International Airport to Kansai International Airport (SEA-KIX) is by far the most common option on this route: Kansai International Airport (KIX) Osaka Itami Airport (ITM) Kobe Airport (UKB).
  • The time difference between Osaka and Seattle is 17h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

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Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

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Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.