Question 1

How long does a flight from Seattle to Washington Dulles Airport take?

Accepted Answer

The average direct flight takes 4h 51m, covering a distance of 5,953 km. Visit our flight page for the latest deals!>/a>

Question 2

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

Accepted Answer

Each day, there are 8 nonstop flights that take off from Seattle and land in Washington, D.C. Dulles Intl Airport, with an average flight time of 5h 01m. The most common departure time is 11:00 p.m. and most flights take off in the morning. Each week, there are 56 flights and there are the same amount of flights each day (8). Visit our flight page for the latest deals!>/a>

Question 3

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

Accepted Answer

In the last 3 days, the lowest price for a flight from Seattle to Washington, D.C. Dulles Intl Airport 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-Dulles-Intl-IAD'>Visit our flight page for the latest deals!>/a>

Question 4

Which airlines fly most frequently between Seattle and Washington Dulles Airport?

Accepted Answer

Seattle and Washington Dulles Airport are connected by different airlines. The airlines that fly that route the most regularly are United Airlines (28 flights per week), Alaska Airlines (21 flights per week), and Delta (7 flights per week). Visit our flight page for the latest deals!>/a>

Question 5

What’s the cheapest day of the week to fly from Seattle to Washington Dulles Airport?

Accepted Answer

If your flying dates are flexible, you should consider flying to Washington Dulles Airport on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Seattle to Washington Dulles Airport. For your return ticket, we recommend flying on a Thursday and avoiding Saturdays for the best deals. Visit our flight page for the latest deals!>/a>

Question 6

What’s the earliest departure time from Seattle to Washington Dulles Airport?

Accepted Answer

Early birds can take the earliest flight from Seattle at 8:00 am and will be landing in Washington, D.C. Dulles Intl Airport at 4:11 pm.

Question 7

What’s the latest departure time from Seattle to Washington Dulles Airport?

Accepted Answer

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

Question 8

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

Accepted Answer

There are 3 airlines that fly direc from Seattle to Washington, D.C. Dulles Intl Airport. They are: Alaska Airlines, Delta and United Airlines. The cheapest price of all airlines flying this route was found with Alaska Airlines at C$ 261 for a round-trip flight. On average, the best prices for this route can be found at Alaska Airlines.

Question 9

Which airlines offer Wi-Fi service onboard planes from Seattle to Washington Dulles Airport?

Accepted Answer

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

Question 10

Which aircraft models fly most regularly from Seattle to Washington Dulles Airport?

Accepted Answer

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

Question 11

Which airline alliances offer flights from Seattle to Washington Dulles Airport?

Accepted Answer

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

Question 12

On which days can I fly direct from Seattle to Washington Dulles Airport?

Accepted Answer

There are direct flights from Seattle to Washington Dulles Airport on a daily basis.

Question 13

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

Accepted Answer

The cheapest month for flights from Seattle to Washington, D.C. Dulles Intl Airport is February, where tickets cost C$ 470 (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$ 705 and C$ 659 respectively.

Question 14

How does KAYAK find such low prices on flights from Seattle to Washington Dulles Airport?

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 Dulles Airport. <a href='/flight-routes/Seattle-Tacoma-Intl-SEA/Washington-D-C-Dulles-Intl-IAD'>Visit our flight page for the latest deals!>/a>

Question 15

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Washington Dulles Airport?

Accepted Answer

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

Question 16

What is the Hacker Fare option on flights from Seattle to Washington Dulles Airport?

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 Dulles Airport with an airline and back to Seattle with another airline. <a href='/flight-routes/Seattle-Tacoma-Intl-SEA/Washington-D-C-Dulles-Intl-IAD'>Visit our flight page for the latest deals!>/a>

Question 17

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

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 Dulles Airport 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-Dulles-Intl-IAD'>Visit our flight page for the latest deals!>/a>

Question 18

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

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 19

Which airlines provide the cheapest flights from Seattle to Washington Dulles Airport?

Accepted Answer

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

Question 20

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

Accepted Answer

To get a below average price on the flight from Seattle to Washington, D.C. Dulles Intl Airport, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Low season	February
High season	December
Cheapest flight	C$ 190

SEA - IAD

C$ 190 Find Cheap Flights from Seattle to Washington Dulles Airport

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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’s the cheapest day of the week to fly from Seattle to Washington Dulles Airport?

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

The cheapest month for flights from Seattle to Washington, D.C. Dulles Intl Airport is February, where tickets cost C$ 470 (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$ 705 and C$ 659 respectively.

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

To get a below average price on the flight from Seattle to Washington, D.C. Dulles Intl Airport, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Which airlines provide the cheapest flights from Seattle to Washington Dulles Airport?

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

Which airlines fly most frequently between Seattle and Washington Dulles Airport?

Seattle and Washington Dulles Airport are connected by different airlines. The airlines that fly that route the most regularly are United Airlines (28 flights per week), Alaska Airlines (21 flights per week), and Delta (7 flights per week).

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

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

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. Dulles Intl Airport per day?

How long does a flight from Seattle to Washington Dulles Airport take?

The average direct flight takes 4h 51m, covering a distance of 5,953 km.

What’s the earliest departure time from Seattle to Washington Dulles Airport?

Early birds can take the earliest flight from Seattle at 8:00 am and will be landing in Washington, D.C. Dulles Intl Airport at 4:11 pm.

What’s the latest departure time from Seattle to Washington Dulles Airport?

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

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

FAQs for booking Seattle to Washington Dulles Airport flights

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

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

Which airlines offer Wi-Fi service onboard planes from Seattle to Washington Dulles Airport?

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

Which aircraft models fly most regularly from Seattle to Washington Dulles Airport?

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

Which airline alliances offer flights from Seattle to Washington Dulles Airport?

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

On which days can I fly direct from Seattle to Washington Dulles Airport?

There are direct flights from Seattle to Washington Dulles Airport on a daily basis.

How does KAYAK find such low prices on flights from Seattle to Washington Dulles Airport?

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 Dulles Airport.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Washington Dulles Airport?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Seattle 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 Seattle to Washington Dulles Airport?

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 Dulles Airport 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 Dulles Airport?

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 Dulles Airport 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. Dulles Intl Airport

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