$650 Cheap Flights from Washington (IAD) to Sendai (SDJ)

View $650 flight on Wed, Mar 4, 2026Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Sendai Airport (SDJ)

Cheap Flights from Washington to Sendai (IAD-SDJ)

Prices were available within the past 7 days and start at $650 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Washington (IAD) to Sendai (SDJ)
Origin airport
Washington Dulles Intl.
Destination airport
Sendai
Distance
6579 mi

Washington to Sendai Flights

The cheapest times to fly from Washington to Sendai

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 Washington to Sendai are during the month of . You can find some of the cheapest flights from Washington to Sendai with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Sendai

Sunday is one of the best days to book for cheap flights from Washington to Sendai: 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 Washington to Sendai

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 Washington to Sendai in 2025. You can also book with separate airlines for your outbound and return journeys, from $650 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 Washington to Sendai 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 Washington to Sendai 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.

 

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Sendai Airport (SDJ) cost?
Lock in a cheap one-way flight from $650 or cheap return flight from Washington Dulles Intl. Airport (IAD) to Sendai Airport (SDJ) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Sendai Airport (SDJ)?
is the least expensive month to fly from IAD to SDJ. Traveling during quieter months is often the key to finding better fares.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Sendai Airport (SDJ)?
To find the cheapest airline flying from IAD to SDJ, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Sendai Airport (SDJ)?
There are no daily nonstop flights from Washington Dulles Intl. Airport (IAD) to Sendai Airport (SDJ). But you can choose flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way before you know it.
What day of the week has the most flights from IAD to SDJ?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* But this can change based on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Sendai Airport (SDJ)?
To touch down at Sendai Airport (SDJ) without delays, select a flight that leaves from Washington Dulles Intl. Airport (IAD) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Sendai Airport (SDJ) last-minute?
Last-minute fares from IAD to SDJ are typically more expensive. To lock in the cheapest rates, start looking for flights well ahead of time. That said, if you're flexible with your travel dates, you may land a cheap ticket right before you leave.
Is it cheaper to book an IAD to SDJ flight and hotel package?
Compared with arranging hotels and flights separately, booking an IAD to SDJ flight and hotel package with Expedia could lead to significant savings. Better still, having it all in one place takes the hassle out of travel planning. Just secure your flights and select from our extensive range of hotels, then customize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Sendai Airport (SDJ)?
Typically, you can cancel or modify your IAD to SDJ flight. However, there may be additional charges, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you'd like more information, visit our Customer Service portal.

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*Available to One Key members.