Question 1

Which is the best airline for flights from Seattle to Washington, D.C., Alaska Airlines or Delta?

Accepted Answer

The two airlines most popular with KAYAK users for flights from Seattle to Washington, D.C. are Alaska Airlines and Delta. With an average price for the route of C$ 435 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of C$ 330 and an overall rating of 8.0.

Question 2

How long does a flight from Seattle to Washington, D.C. take?

Accepted Answer

The duration of a direct flight to Washington, D.C. from Seattle is typically 4h 51m. The journey crosses a distance of 6,007 km. Visit our flight page for the latest deals!>/a>

Question 3

How many flights are there between Seattle and Washington, D.C. per day?

Accepted Answer

Each day, there are 14 nonstop flights that take off from Seattle and land in Washington, D.C., with an average flight time of 5h 02m. The most common departure time is 9:00 p.m. and most flights take off in the morning. Each week, there are 98 flights and there are the same amount of flights each day (14). Visit our flight page for the latest deals!>/a>

Question 4

What is the cheapest flight from Seattle to Washington, D.C.?

Accepted Answer

In the last 3 days, the lowest price for a flight from Seattle to Washington, D.C. was C$ 139 for a one-way ticket and C$ 271 for a round-trip. <a href='/flight-routes/Seattle-Tacoma-Intl-SEA/Washington-D-C--WAS'>Visit our flight page for the latest deals!>/a>

Question 5

Which airlines fly most frequently between Seattle and Washington, D.C.?

Accepted Answer

Seattle and Washington, D.C. are connected by different airlines. The airlines that fly that route the most regularly are Alaska Airlines (49 flights per week), United Airlines (28 flights per week), and Delta (14 flights per week). Visit our flight page for the latest deals!>/a>

Question 6

What’s the cheapest day of the week to fly from Seattle to Washington, D.C.?

Accepted Answer

When flying from Seattle to Washington, D.C., you should consider leaving on a Thursday and avoid Saturdays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Tuesdays and the most expensive ones on Wednesdays. Visit our flight page for the latest deals!>/a>

Question 7

Which airports will I be using when flying from Seattle to Washington, D.C.?

Accepted Answer

On your way to Washington, D.C., you’ll fly out from Seattle/Tacoma Intl. You’ll be landing in one of Washington, D.C.’s 2 airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. <a href='/flight-routes/Seattle-Tacoma-Intl-SEA/Washington-D-C--WAS'>Visit our flight page for the latest deals!>/a>

Question 8

What’s the earliest departure time from Seattle to Washington, D.C.?

Accepted Answer

Early birds can take the earliest flight from Seattle at 7:20 am and will be landing in Washington, D.C. at 3:30 pm.

Question 9

What’s the latest departure time from Seattle to Washington, D.C.?

Accepted Answer

If you prefer to fly at night, the latest flight from Seattle to Washington, D.C. jets off at 11:30 pm and lands at 7:27 am.

Question 10

Which airlines fly direct between Seattle and Washington, D.C.?

Accepted Answer

There are 4 airlines that fly direc from Seattle to Washington, D.C.. They are: Alaska Airlines, Delta, Southwest and United Airlines. The cheapest price of all airlines flying this route was found with Alaska Airlines at C$ 252 for a round-trip flight. On average, the best prices for this route can be found at Delta.

Question 11

Which airlines offer Wi-Fi service onboard planes from Seattle to Washington, D.C.?

Accepted Answer

Hawaiian Airlines, and Alaska Airlines offer inflight Wi-Fi service on the Seattle to Washington, D.C. flight route.

Question 12

Which aircraft models fly most regularly from Seattle to Washington, D.C.?

Accepted Answer

The Boeing 737 MAX 9 is the aircraft model that flies most regularly on the Seattle to Washington, D.C. flight route.

Question 13

Which airline alliances offer flights from Seattle to Washington, D.C.?

Accepted Answer

oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Seattle and Washington, D.C., with Star Alliance being the most commonly used for this route.

Question 14

On which days can I fly direct from Seattle to Washington, D.C.?

Accepted Answer

There are direct flights from Seattle to Washington, D.C. on a daily basis.

Question 15

What is the cheapest month to fly from Seattle to Washington, D.C.?

Accepted Answer

The cheapest month for flights from Seattle to Washington, D.C. is September, where tickets cost C$ 447 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is C$ 693 and C$ 625 respectively.

Question 16

How does KAYAK find such low prices on flights from Seattle to Washington, D.C.?

Accepted Answer

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Washington, D.C.. <a href='/flight-routes/Seattle-Tacoma-Intl-SEA/Washington-D-C--WAS'>Visit our flight page for the latest deals!>/a>

Question 17

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Washington, D.C.?

Accepted Answer

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. from Seattle is likely to change within 7 days, so travelers know whether to wait or book now. <a href='/flight-routes/Seattle-Tacoma-Intl-SEA/Washington-D-C--WAS'>Visit our flight page for the latest deals!>/a>

Question 18

What is the Hacker Fare option on flights from Seattle to Washington, D.C.?

Accepted Answer

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington, D.C. with an airline and back to Seattle with another airline. <a href='/flight-routes/Seattle-Tacoma-Intl-SEA/Washington-D-C--WAS'>Visit our flight page for the latest deals!>/a>

Question 19

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Washington, D.C.?

Accepted Answer

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington, D.C. from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. <a href='/flight-routes/Seattle-Tacoma-Intl-SEA/Washington-D-C--WAS'>Visit our flight page for the latest deals!>/a>

Question 20

Which cabin class options are there for flights between Seattle and Washington, D.C.?

Accepted Answer

There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Question 21

Which airlines provide the cheapest flights from Seattle to Washington, D.C.?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Seattle to Washington, D.C. were found on Hawaiian Airlines (C$ 371) and Delta (C$ 379).

Question 22

What is the cheapest Seattle to Washington, D.C. flight route?

Accepted Answer

Our data shows that the cheapest route for a return flight from Seattle to Washington, D.C. cost C$ 437 and was between Seattle (SEA) and Baltimore (BWI). On average, the best prices are found if you fly from Seattle (SEA) to Washington, D.C. Reagan-National Airport (DCA). The average price for a return flight for this route is C$ 437.

Question 23

How far in advance should I book a flight from Seattle to Washington, D.C.?

Accepted Answer

To get a below average price on the flight from Seattle to Washington, D.C., you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Question 24

Can I save money by flying with a layover from Seattle to Washington, D.C.?

Accepted Answer

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at C$ 355 on average.

Low season	February
High season	April
Cheapest flight	C$ 190

SEA - WAS

C$ 190 Find Cheap Flights from Seattle to Washington, D.C.

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Cheap Flights from Seattle to Washington, D.C. (SEA-WAS)

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Expert advice for your flight from Seattle to Washington, D.C.

KAYAK's insights & trends for Seattle to Washington, D.C. flights

Get data-powered insights and trends into flights from Seattle to Washington, D.C. to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Seattle to Washington, D.C. flight route?

What’s the cheapest day of the week to fly from Seattle to Washington, D.C.?

When flying from Seattle to Washington, D.C., you should consider leaving on a Thursday and avoid Saturdays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Tuesdays and the most expensive ones on Wednesdays.

What is the cheapest month to fly from Seattle to Washington, D.C.?

The cheapest month for flights from Seattle to Washington, D.C. is September, where tickets cost C$ 447 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is C$ 693 and C$ 625 respectively.

Can I save money by flying with a layover from Seattle to Washington, D.C.?

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at C$ 355 on average.

How far in advance should I book a flight from Seattle to Washington, D.C.?

To get a below average price on the flight from Seattle to Washington, D.C., you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Which airlines provide the cheapest flights from Seattle to Washington, D.C.?

In the past 3 days, the cheapest round-trip tickets from Seattle to Washington, D.C. were found on Hawaiian Airlines (C$ 371) and Delta (C$ 379).

Which airlines fly most frequently between Seattle and Washington, D.C.?

Seattle and Washington, D.C. are connected by different airlines. The airlines that fly that route the most regularly are Alaska Airlines (49 flights per week), United Airlines (28 flights per week), and Delta (14 flights per week).

Which airlines fly direct between Seattle and Washington, D.C.?

Which cabin class options are there for flights between Seattle and Washington, D.C.?

There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How many flights are there between Seattle and Washington, D.C. per day?

How long does a flight from Seattle to Washington, D.C. take?

The duration of a direct flight to Washington, D.C. from Seattle is typically 4h 51m. The journey crosses a distance of 6,007 km.

What’s the earliest departure time from Seattle to Washington, D.C.?

Early birds can take the earliest flight from Seattle at 7:20 am and will be landing in Washington, D.C. at 3:30 pm.

What’s the latest departure time from Seattle to Washington, D.C.?

If you prefer to fly at night, the latest flight from Seattle to Washington, D.C. jets off at 11:30 pm and lands at 7:27 am.

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When to book flights from Seattle to Washington, D.C.

Flights from Seattle to Washington, D.C.: the best tips from KAYAK users' own experiences

FAQs for booking flights from Seattle to Washington, D.C.

What is the cheapest flight from Seattle to Washington, D.C.?

In the last 3 days, the lowest price for a flight from Seattle to Washington, D.C. was C$ 139 for a one-way ticket and C$ 271 for a round-trip.

Which airports will I be using when flying from Seattle to Washington, D.C.?

On your way to Washington, D.C., you’ll fly out from Seattle/Tacoma Intl. You’ll be landing in one of Washington, D.C.’s 2 airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl.

Which airlines offer Wi-Fi service onboard planes from Seattle to Washington, D.C.?

Hawaiian Airlines, and Alaska Airlines offer inflight Wi-Fi service on the Seattle to Washington, D.C. flight route.

Which aircraft models fly most regularly from Seattle to Washington, D.C.?

The Boeing 737 MAX 9 is the aircraft model that flies most regularly on the Seattle to Washington, D.C. flight route.

Which airline alliances offer flights from Seattle to Washington, D.C.?

oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Seattle and Washington, D.C., with Star Alliance being the most commonly used for this route.

On which days can I fly direct from Seattle to Washington, D.C.?

There are direct flights from Seattle to Washington, D.C. on a daily basis.

Which is the best airline for flights from Seattle to Washington, D.C., Alaska Airlines or Delta?

How does KAYAK find such low prices on flights from Seattle to Washington, D.C.?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Washington, D.C..

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Washington, D.C.?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Seattle to Washington, D.C.?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington, D.C. with an airline and back to Seattle with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Washington, D.C.?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington, D.C. from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Washington, D.C.

Prefer to fly direct from Seattle to Washington, D.C.?

Top airlines flying from Seattle to Washington, D.C.

Everything you need to know for your flight from Seattle to Washington, D.C.

Information on your arrival and departure airports

Cabin class types available on flights from Seattle to Washington, D.C.

Complete your trip to Washington, D.C. with a hotel stay or car rental

Find direct flights to and from Seattle and Washington, D.C.

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Flights from domestic origins to Washington, D.C.

Choose which airport to fly into in Washington, D.C.