The cheapest times to fly from SDJ to SEA are

  • February 26th to July 29th (except the weeks of April 2nd and April 23rd)
  • September 3rd to September 30th
  • November 19th to December 2nd

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from SDJ to SEA is early to mid March. Prices can be as high as $1940 for Saturday flights during late December, or as low as $776 for Thursday flights around early to mid March.


When to Fly to Seattle

Flying from Sendai (SDJ) to Seattle, WA (SEA) will usually cost between $920 to $1455 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid March with an average ticket price of $904. Due to high demand the most expensive time to fly is late December, with an average price of $1538. Planning your trip to low-cost times can easily save you $634 on economy flights and even more on first-class flights. Generally, any price below $1073 can be considered a good price for a round-trip SDJ to SEA flight.

See below for a graph of average weekly prices for the SDJ to SEA route. All prices are for round-trip tickets in USD.

SDJ to SEA Flight Prices

Compared to other flights, the SDJ to SEA flight is priced close to the average and costs less than the average flight leaving from Sendai. The average price per mile (for a direct flight) is $0.14, which is far below average.


Flight Prices by Day of the Week

Thursday is usually the cheapest day to fly to SEA, and Monday the cheapest day to fly back into SDJ. Saturdays are the most expensive days to fly to Seattle, and Fridays are the most expensive days to return to Sendai. Selecting flights on the least expensive days could save you up to $121 (10%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Thursday and returning a week later will cost an average of $1091. Return trip prices are from the SEA to SDJ flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from SDJ to SEA can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 9 hour 18 minutes may not be realistic.


Flight Hacking SDJ to SEA

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from SDJ to SEA — but Champion Traveler does!

Hack #1: Taipei (SDJ > TPE > SEA)

  • Price for both tickets: $1022
  • Average savings: $51 (4.76%)

See SDJ to flights


Flight Questions Answered

Still have questions about flying from SDJ to SEA? We’ve got answers.

Which airlines fly this route?

You can find 14 major airlines flying this route most often: Air Canada, Air China, American, ANA, Asiana, Delta, EVA Air, Garuda Indonesia, Hawaiian, JAL, Singapore Airlines, THAI, United, Vietnam Airlines, and potentially more during busy seasons.

How far away is it from Seattle/Tacoma International Airport to Sendai Airport?

The distance between the two airports is roughly 4622 miles or 7438 kilometers.

How long does it take to fly from SDJ to SEA?

The real-world flight time for a nonstop SDJ to SEA flight is about 9 hour 18 minutes.

How many flights go between Sendai and Seattle, WA?

It depends on the day of the week and the date, but a typical day might have around 13 available flights from SDJ to SEA.


Airport Location Info


Departing Airport

Origination code SDJ
Origination airport name Sendai Airport
City Sendai
Country Japan
Latitude 38.1
Longitude 140.9

Return Airport

Destination code SEA
Destination airport name Seattle/Tacoma International Airport
City Seattle, WA
Country the United States
Latitude 47.5
Longitude -122.3


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.