$588 Cheap Flights from Sendai (SDJ) to Seattle (SEA)

View $588 flight on Tue, May 19, 2026Opens in a new window

Popular airlines from Sendai Airport (SDJ) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Sendai to Seattle (SDJ-SEA)

Prices were available within the past 7 days and start at $588 for one-way flights and $1,211 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Asiana Airlines
Sun, Apr 12 - Fri, Apr 17
SDJ
Sendai
SEA
Seattle
$1,211 Roundtrip, found 5 days ago
$1,211
Roundtrip
found 5 days ago
Select Asiana Airlines flight, departing Sun, Apr 12 from Sendai to Seattle, returning Fri, Apr 17, priced at $1,211 found 5 days ago
Japan Airlines
Sun, Apr 12 - Fri, Apr 17
SDJ
Sendai
SEA
Seattle
$1,268 Roundtrip, found 5 days ago
$1,268
Roundtrip
found 5 days ago
Select Japan Airlines flight, departing Sun, Apr 12 from Sendai to Seattle, returning Fri, Apr 17, priced at $1,268 found 5 days ago
Asiana Airlines
Sun, Apr 12 - Sat, Apr 18
SDJ
Sendai
SEA
Seattle
$1,291 Roundtrip, found 5 days ago
$1,291
Roundtrip
found 5 days ago
Select Asiana Airlines flight, departing Sun, Apr 12 from Sendai to Seattle, returning Sat, Apr 18, priced at $1,291 found 5 days ago
Japan Airlines
Sun, Apr 12 - Sat, Apr 18
SDJ
Sendai
SEA
Seattle
$1,348 Roundtrip, found 5 days ago
$1,348
Roundtrip
found 5 days ago
Select Japan Airlines flight, departing Sun, Apr 12 from Sendai to Seattle, returning Sat, Apr 18, priced at $1,348 found 5 days ago
Japan Airlines
Sun, Apr 12 - Sat, Apr 18
SDJ
Sendai
SEA
Seattle
$1,351 Roundtrip, found 5 days ago
$1,351
Roundtrip
found 5 days ago
Select Japan Airlines flight, departing Sun, Apr 12 from Sendai to Seattle, returning Sat, Apr 18, priced at $1,351 found 5 days ago
Asiana Airlines
Sun, Apr 12 - Sat, Apr 18
SDJ
Sendai
SEA
Seattle
$1,373 Roundtrip, found 5 days ago
$1,373
Roundtrip
found 5 days ago
Select Asiana Airlines flight, departing Sun, Apr 12 from Sendai to Seattle, returning Sat, Apr 18, priced at $1,373 found 5 days ago
Asiana Airlines
Sun, Apr 12 - Sat, Apr 18
SDJ
Sendai
SEA
Seattle
$1,373 Roundtrip, found 5 days ago
$1,373
Roundtrip
found 5 days ago
Select Asiana Airlines flight, departing Sun, Apr 12 from Sendai to Seattle, returning Sat, Apr 18, priced at $1,373 found 5 days ago
Japan Airlines
Sun, Apr 12 - Fri, Apr 17
SDJ
Sendai
SEA
Seattle
$1,419 Roundtrip, found 5 days ago
$1,419
Roundtrip
found 5 days ago
Select Japan Airlines flight, departing Sun, Apr 12 from Sendai to Seattle, returning Fri, Apr 17, priced at $1,419 found 5 days ago
Japan Airlines
Sun, Apr 12 - Sat, Apr 18
SDJ
Sendai
SEA
Seattle
$1,429 Roundtrip, found 5 days ago
$1,429
Roundtrip
found 5 days ago
Select Japan Airlines flight, departing Sun, Apr 12 from Sendai to Seattle, returning Sat, Apr 18, priced at $1,429 found 5 days ago
All Nippon Airways
Sun, Apr 12 - Fri, Apr 17
SDJ
Sendai
SEA
Seattle
$7,412 Roundtrip, found 5 days ago
$7,412
Roundtrip
found 5 days ago
Select All Nippon Airways flight, departing Sun, Apr 12 from Sendai to Seattle, returning Fri, Apr 17, priced at $7,412 found 5 days ago

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Frequently asked questions

How much does a flight from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find cheap one-way flights from $588 and cheap return flights from $1,211 SDJ to SEA with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when SDJ to SEA ticket fares go up or down.
What is the cheapest month to fly from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The cheapest month to fly from SDJ to SEA is April when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Enter SDJ to SEA and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
All Nippon Airways, Asiana Airlines and Japan Airlines are just some of the carriers that fly from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.). Use Expedia's flight search tool to compare airlines on this route and find our cheapest option for your trip. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from SDJ to SEA. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The busiest day for flights from (SDJ) to Seattle - Tacoma Intl. (SEA) is a Friday, with around 18 flights. This gives you plenty of options for your travel plans. Major airlines on this route include IBEX Airlines and Japan Airlines.
What are the most popular departure times for flights from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Sendai (SDJ) to Seattle (SEA) are from noon to 3pm. About 42% of passengers prefer this time window. Many major carriers, including All Nippon Airways, Delta Air Lines, and Korean Air, offer flights during this window. This timing works well because it allows you to arrive in Seattle in the evening, giving you time to settle in before exploring the city.
How long does it take to fly from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Flying from SDJ to SEA with a connection usually takes about 17 hours 30 minutes, traveling roughly 4,623 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Business class seats are offered on the SDJ to SEA route with Asiana Airlines.
How do I earn miles on a Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
It's easy to earn miles on a Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seattle from SDJ (SDJ)?
From SDJ (SDJ), you can fly into Seattle - Tacoma Intl. (SEA) to reach Seattle. Some flights may connect through major hubs like Taoyuan Intl. (TPE), Itami (ITM), New Chitose (CTS) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.) at the last minute?
Typically, booking a last minute flight from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package?
Securing a Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.) Seattle Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your Sendai (SDJ) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Sendai
Destination airport
Seattle - Tacoma Intl.
Roundtrip price
$1,210
Distance
4622 mi

Book with confidence

Sendai to Seattle Flights

The cheapest times to fly from Sendai to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Sendai to Seattle are during the month of April. You can find some of the cheapest flights from Sendai to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sendai to Seattle

Sunday is one of the best days to book for cheap flights from Sendai to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Sendai to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Sendai to Seattle in 2026. You can also book with separate airlines for your outbound and return journeys, from $588 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Sendai to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Sendai to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Sendai to Seattle Flights

*Flight schedules are subject to change.

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*Available to One Key members.