Question 1

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

Accepted Answer

Direct flights take on average 5h 45m to travel the 2,299 miles between Washington, D.C. and Seattle.

Question 2

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

Accepted Answer

Each day, there are between 5 and 6 direct flights that take off from Washington, D.C. Dulles Intl Airport and land in Seattle, with an average flight time of 5h 44m. The most common departure time is 17:00 and most flights take off in the morning. Each week, there are 41 flights. The most frequent day of departure is Monday, when 15% of all weekly flights depart. The fewest flights depart on a Tuesday.

Question 3

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

Accepted Answer

Each day, there are between 5 and 6 direct flights that take off from Washington, D.C. Dulles Intl Airport and land in Seattle, with an average flight time of 5h 44m. The most common departure time is 17:00 and most flights take off in the morning. Each week, there are 41 flights. The most frequent day of departure is Monday, when 15% of all weekly flights depart. The fewest flights depart on a Tuesday.

Question 4

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

Accepted Answer

In the last 5 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Seattle was £124 for a one-way ticket and £211 for a return.

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 (13 flights per week), and Delta (7 flights per week).

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 (13 flights per week), and Delta (7 flights per week).

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.

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 07:00 and will be landing in Seattle at 09:37.

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 18:00 and lands at 20:45.

Question 10

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

Accepted Answer

Alaska Airlines, Delta, JetBlue, and Hawaiian 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 is the aircraft model that flies most regularly on the Washington, D.C. to Seattle flight route.

Question 12

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 13

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 January, where tickets cost £171 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £398 and £378 respectively.

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 January, where tickets cost £171 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £398 and £378 respectively.

Question 15

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.

Question 16

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.

Question 17

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.

Question 18

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.

Question 19

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

Accepted Answer

There are 2 cabin class options for the route. These are 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 20

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

Accepted Answer

There are 2 cabin class options for the route. These are 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 Washington, D.C. to Seattle?

Accepted Answer

In the past 5 days, the cheapest return tickets from Washington, D.C. to Seattle were found on Alaska Airlines (£211) and United Airlines (£215).

Question 22

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

Accepted Answer

In the past 5 days, the cheapest return tickets from Washington, D.C. to Seattle were found on Alaska Airlines (£211) and United Airlines (£215).

Question 23

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 60% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

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 60% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Question 25

How much is a return flight from Washington, D.C. Dulles Intl Airport to Seattle?

Accepted Answer

Flight prices are below average for this route right now.Flights to Seattle from Washington, D.C. Dulles Intl Airport usually cost between £262 and £428 in September.
The lowest price found in the past 5 days was £211 on Alaska Airlines (12 Sept–21 Sept).

IAD - SEA

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

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

How much is a return flight from Washington, D.C. Dulles Intl Airport to Seattle?

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

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

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

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

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

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?

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

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

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