Find cheap airlines flights from Osaka to Seattle

You can choose from 4 airlines that fly from Osaka to Seattle, including Asiana Airlines, EVA Air, and Hainan Airlines. Hainan Airlines has lowest fares on this route.
Asiana Airlines logo Asiana Airlines
EVA Air logo EVA Air
Hainan Airlines logo Hainan Airlines
Korean Air logo Korean Air
Airlines are determined based on actual purchased flight tickets from Osaka to Seattle according to previous 12 months data from Trip.com.

Find flight deals from Osaka to Seattle for the next 3 months. Book one way flights from $397 or round trip flights from $636.

Displayed flight fares from Osaka to Seattle are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight Info | Osaka to Seattle

The distance between Osaka and Seattle is approximately 8,051.25 km. Based on Trip.com's data travel demand peaks in January. The off-season for travel is December.

Cheapest one-way flight price$397
Cheapest round-trip ticket price$636
Off-season for travelDecember
Peak season for travelJanuary
Flight distance8,051.25 km
Popular airlineAsiana Airlines
Flight statistics for the Osaka–Seattle route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com price insights on flights from Osaka to Seattle

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

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

Based on Trip.com’s data, the cheapest month for flights from Osaka to Seattle is Oct, with an average price of $536; while the month with the highest flight price is usually Jan, with an average price of up to $922.

$922
$729
$536
$343
    Cheapest
  • $546
    Feb
  • $643
    Mar
  • $579
    Apr
  • $547
    May
  • $752
    Jun
  • $600
    Jul
  • $679
    Aug
  • $567
    Sep
  • $536
    Oct
  • $633
    Nov
  • $627
    Dec
  • $922
    Jan

What is the cheapest month for round-trip flights from Osaka to Seattle?

Average price of round-trip flights from Osaka to Seattle purchased by Trip.com users by month over the past 12 months

According to historical data from Trip.com, the lowest prices for flights from Osaka to Seattle are found during Oct, with an average price of $730. Conversely, the highest prices are found during Jul, with an average price of up to $1,305.

$1,305
$1,018
$730
$443
    Cheapest
  • $1,014
    Feb
  • $793
    Mar
  • $1,056
    Apr
  • $1,109
    May
  • $1,046
    Jun
  • $1,305
    Jul
  • $1,274
    Aug
  • $1,134
    Sep
  • $730
    Oct
  • $1,029
    Nov
  • $1,057
    Dec
  • $1,216
    Jan

What's the cheapest day to fly from Osaka to Seattle?

Data is based on the average flight price for each day of the week from Osaka to Seattle on Trip.com over the past 12 months.

Based on Trip.com data from the past 12 months, the cheapest day to fly from Osaka to Seattle is Wed, with average prices lower than on other days. Avoid Sat, as prices are usually highest then.

$781
$692
$602
$513
    Cheapest
  • $646
    Mon
  • $632
    Tue
  • $602
    Wed
  • $608
    Thu
  • $628
    Fri
  • $781
    Sat
  • $727
    Sun

Frequently Asked Questions

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

    Based on Trip.com data, Hainan Airlines offers one-way fares as low as $397 on Cheapest nonstop routes (e.g. KIX to SEA on Mon, Mar 9), while Air Canada offers Cheapest nonstop round-trips from $636 departing on Fri, Apr 3 and returning on Mon, Apr 6.
  • At the moment, you can catch a nonstop flight from Osaka to Seattle with the following airlines, including: Korean Air 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 Osaka to Seattle 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 Osaka to Seattle, 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 Mon, Mar 9, with one-way flights priced at just $397.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Hainan Airlines.
    · 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 Seattle travel is around January.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Osaka to Seattle is December, when demand for travel is lower.
  • After crunching the numbers on our February flight calendar, it's currently cheapest to fly from Osaka to Seattle on February 16, 2026 with Hainan Airlines, with prices starting at $410.
  • You can land at any one of the following hubs in Seattle, with Kansai International Airport to Seattle–Tacoma International Airport (KIX-SEA) is by far the most common option on this route: Seattle–Tacoma International Airport (SEA) King County (Boeing Field) International Airport (BFI) Kenmore Air - Lake Union (LKE).
  • The time difference between Seattle and Osaka 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.

Trip.com airline insights on flights from Osaka to Seattle

Which airlines offer the cheapest nonstop flights from Osaka to Seattle?

Data is based on the average price of all nonstop flights from Osaka to Seattle on Trip.com in the past 12 months.

Based on Trip.com data from the past 12 months, Philippine Airlines offers the cheapest nonstop flights from Osaka to Seattle, with an average price of $575.

$449
$575
$701
$827
$953
Philippine Airlines
$575
Philippine Airlines
EVA Air
$769
EVA Air
Asiana Airlines
$772
Asiana Airlines
Korean Air
$808
Korean Air
Air Canada
$925
Air Canada
STARLUX Airlines
$953
STARLUX Airlines