Question 1

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

Accepted Answer

Direct flights from Washington, D.C. generally make it to Seattle in 5h 40m. The flying distance between the two cities is 2,299 miles. Visit our flight page for the latest deals!>/a>

Question 2

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

Accepted Answer

Each day, there are 6 direct flights that take off from Washington, D.C. Dulles Intl Airport and land in Seattle, with an average flight time of 5h 45m. The most common departure time is 17:00 and most flights take off in the morning. Each week, there are 42 flights and there are the same number of flights each day (6). Visit our flight page for the latest deals!>/a>

Question 3

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

Accepted Answer

Each day, there are 6 direct flights that take off from Washington, D.C. Dulles Intl Airport and land in Seattle, with an average flight time of 5h 45m. The most common departure time is 17:00 and most flights take off in the morning. Each week, there are 42 flights and there are the same number of flights each day (6). Visit our flight page for the latest deals!>/a>

Question 4

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

Accepted Answer

In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Seattle was £133 for a one-way ticket and £257 for a return. <a href='/flight-routes/Washington-D-C-Dulles-Intl-IAD/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 5

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

Accepted Answer

Washington, D.C. and Seattle are connected by different airlines. The airlines that fly that route the most regularly are Alaska Airlines (21 flights per week), United Airlines (14 flights per week), and Delta (7 flights per week). Visit our flight page for the latest deals!>/a>

Question 6

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

Accepted Answer

Washington, D.C. and Seattle are connected by different airlines. The airlines that fly that route the most regularly are Alaska Airlines (21 flights per week), United Airlines (14 flights per week), and Delta (7 flights per week). Visit our flight page for the latest deals!>/a>

Question 7

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

Accepted Answer

On your way to Seattle, you’ll fly out from Washington, D.C. Dulles Intl. You’ll be landing at Seattle/Tacoma Intl. <a href='/flight-routes/Washington-D-C-Dulles-Intl-IAD/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 8

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

Accepted Answer

Early birds can take the earliest flight from Washington, D.C. Dulles Intl Airport at 06:25 and will be landing in Seattle at 09:08.

Question 9

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

Accepted Answer

If you prefer to fly at night, the latest flight from Washington, D.C. Dulles Intl Airport to Seattle jets off at 19:41 and lands at 22:30.

Question 10

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

Accepted Answer

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

Question 11

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

Accepted Answer

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

Question 12

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

Accepted Answer

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

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Seattle is February, where tickets cost £252 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is £359 and £344 respectively.

Question 15

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

Accepted Answer

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Seattle is February, where tickets cost £252 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is £359 and £344 respectively.

Question 16

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

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 Washington, D.C. to Seattle. <a href='/flight-routes/Washington-D-C-Dulles-Intl-IAD/Seattle-Tacoma-Intl-SEA'>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 Washington, D.C. to Seattle?

Accepted Answer

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

Question 18

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

Accepted Answer

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Seattle with an airline and back to Washington, D.C. with another airline. <a href='/flight-routes/Washington-D-C-Dulles-Intl-IAD/Seattle-Tacoma-Intl-SEA'>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 Washington, D.C. to Seattle?

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 Seattle from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. <a href='/flight-routes/Washington-D-C-Dulles-Intl-IAD/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 20

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

Accepted Answer

There are 3 cabin class options for the route. These are 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 cabin class options are there for flights between Washington, D.C. Dulles Intl Airport and Seattle?

Accepted Answer

There are 3 cabin class options for the route. These are 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 22

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

Accepted Answer

In the past 3 days, the cheapest return tickets from Washington, D.C. to Seattle were found on Delta (£189) and United Airlines (£194).

Question 23

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

Accepted Answer

In the past 3 days, the cheapest return tickets from Washington, D.C. to Seattle were found on Delta (£189) and United Airlines (£194).

Question 24

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

Accepted Answer

To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to Seattle, you should book around 4 weeks before departure, which saves you about 54% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Question 25

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

Accepted Answer

To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to Seattle, you should book around 4 weeks before departure, which saves you about 54% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Question 26

Can I save money by flying with a stopover from Washington, D.C. Dulles Intl Airport to Seattle?

Accepted Answer

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 1 stop stopover the cheapest option at £173 on average.

Question 27

Can I save money by flying with a stopover from Washington, D.C. Dulles Intl Airport to Seattle?

Accepted Answer

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 1 stop stopover the cheapest option at £173 on average.

Low season	February
High season	July
Cheapest flight	£98

IAD - SEA

£98 Find Cheap Flights from Washington, D.C. to Seattle

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

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Everything you should know

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

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

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

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Seattle is February, where tickets cost £252 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is £359 and £344 respectively.

Can I save money by flying with a stopover from Washington, D.C. Dulles Intl Airport to Seattle?

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 1 stop stopover the cheapest option at £173 on average.

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

To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to Seattle, you should book around 4 weeks before departure, which saves you about 54% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

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

In the past 3 days, the cheapest return tickets from Washington, D.C. to Seattle were found on Delta (£189) and United Airlines (£194).

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

Washington, D.C. and Seattle are connected by different airlines. The airlines that fly that route the most regularly are Alaska Airlines (21 flights per week), United Airlines (14 flights per week), and Delta (7 flights per week).

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

There are 3 cabin class options for the route. These are 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 Washington, D.C. Dulles Intl Airport and Seattle per day?

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

Direct flights from Washington, D.C. generally make it to Seattle in 5h 40m. The flying distance between the two cities is 2,299 miles.

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

Early birds can take the earliest flight from Washington, D.C. Dulles Intl Airport at 06:25 and will be landing in Seattle at 09:08.

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

If you prefer to fly at night, the latest flight from Washington, D.C. Dulles Intl Airport to Seattle jets off at 19:41 and lands at 22:30.

Good to know - Cheap tickets from Washington, D.C. to Seattle

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

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

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

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

In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Seattle was £133 for a one-way ticket and £257 for a return.

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

On your way to Seattle, you’ll fly out from Washington, D.C. Dulles Intl. You’ll be landing at Seattle/Tacoma Intl.

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

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

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

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

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

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

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

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

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

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 Washington, D.C. to Seattle.

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

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

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

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

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

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 Seattle from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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

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