$206 Find Cheap Flights from Washington Dulles Airport to Seattle - Compare and Save

These are the earliest and latest flight times available from Washington, D.C. Dulles Intl Airport to Seattle:

• Earliest: departs at 7:00 am and lands at 12:59 pm
• Latest: departs at 5:55 pm and lands at 11:54 pm.

The flight takes about 5h 59m.

Three cabin classes are available on flights from Washington, D.C. Dulles Intl Airport to Seattle:

• Economy Class
• Business Class
• First Class

A nonstop flight from Washington, D.C. Dulles Intl Airport to Seattle takes 5h 59m, covering 2,299 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

Round-trip flights from Washington, D.C. Dulles Intl Airport to Seattle range from $347 to $577, with an average of $451 over the past 12 months. Anything below $347 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 79% above the $451 route average. Book 8 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $319 round-trip via Denver Intl (DEN), compared to $453 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $35–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 737 family is used most often on this route, operated mainly by American Airlines and United Airlines. Other aircraft seen on the route include Boeing 737-800 Passenger/BBJ2 (winglets) variants.

Morning is the busiest departure period on Washington, D.C. Dulles Intl Airport to Seattle flights, with 50% of flights leaving in that window. Evening departures account for 50%, afternoon flights for 0%, and night flights for 0%.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $301 to $1,816. That means the highest observed fare was about 6x higher than the lowest one.

Two airlines offer in-flight Wi-Fi on Washington, D.C. Dulles Intl Airport to Seattle flights:

• Alaska Airlines
• Delta

Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty program; others are paid add-ons priced by flight length.

One-way fares from Washington, D.C. Dulles Intl Airport to Seattle are currently lower than usual. Average one-way flight prices are about $209, which is 31% below the typical average for this route.

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates starting from around $4 for economy cars. Top options include:

• Fox
• Europcar
• Thrifty
• Budget
• Hertz

Flights from Washington, D.C. Dulles Intl Airport to Seattle usually depart from Washington, D.C. Dulles Intl (IAD) and arrive at Seattle/Tacoma Intl (SEA).

One-stop flights from Washington, D.C. Dulles Intl Airport to Seattle most commonly connect through:

• Las Vegas Harry Reid Intl (LAS) - 49% of one-stop connections
• Charlotte Douglas (CLT) - 20% of one-stop connections
• Minneapolis St Paul (MSP) - 10% of one-stop connections
• Chicago O'Hare Intl (ORD) - 7% of one-stop connections

Yes. Flexible dates can save you up to 19% on flights from Washington, D.C. Dulles Intl Airport to Seattle. Wednesday is the cheapest departure day at $420 round-trip on average, while Sunday is the most expensive at $517, a difference of $97.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

3 airlines operate flights between Washington, D.C. Dulles Intl Airport and Seattle. The airlines offering nonstop flights on this route include:

• Alaska Airlines
• United Airlines
• Delta

Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time at 7h 46m, compared with 7h 55m via Minneapolis St Paul (MSP) and 7h 57m via Chicago O'Hare Intl (ORD).

Seattle is 3 hours behind Washington, D.C. Dulles Intl Airport (Pacific Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in Seattle are Pike Place Market, Lumen Field and Space Needle. These are among the most viewed places in Seattle on KAYAK.

Among airlines operating Washington, D.C. Dulles Intl Airport to Seattle flights:

• Alaska Airlines: offers extra legroom; offers free seat selection
• United Airlines: offers extra legroom; offers free seat selection
• Delta: offers extra legroom; offers free seat selection
• American Airlines: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Here are some options for this route, based on selected ticket types and cabin classes:

• Alaska Airlines: a cabin bag and a checked bag in Economy Class
• United Airlines: a cabin bag and a checked bag in Economy Class
• Delta: a cabin bag and a checked bag in Economy Class

Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

Travelers can reach a downtown Seattle hotel from SEA by subway or bus. The subway picks up passengers on the 4th floor of the parking garage. Two bus services are also available. King County Metro serves various parts of Seattle and picks up by the subway station. Sound Transit serves Bellevue and Renton, with Routes 560 and 574 picking up at the south end of the main terminal's lower drive.

Washington Dulles International Airport (IAD) and Seattle–Tacoma International Airport (SEA) have lounges sponsored by airlines or credit card companies. These lounges offer complimentary drinks and snacks, along with a quieter place to wait.

Long-term parking is available in the parking garage and the terminal parking lot near the terminal. An economy lot is also available farther away, with shuttle service to the main terminal.