Cheap flights from Seattle to Dulles Intl (SEA - IAD)

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How to find the cheapest flight from
Seattle (SEA) to Dulles Intl (IAD)

All the information you need to plan the best SEA to IAD flight in 2021: compare Seattle to Dulles Intl flight prices with the expected peak season, weather and rainfall in Dulles Intl.
SEA - IAD
Price
$252 - $381
IAD
Temperature
35.6 - 80.6 °F
IAD
Precipitation
2.6 - 4 inches

Popular in

December

High demand for flights, 21% potential price rise

Cheapest in

February

Best time to find cheap flights, 16% potential price drop

Round-trip from

$252

From Seattle/Tacoma Intl to Washington Dulles Intl

One-way from

$182

One-way flight from Seattle/Tacoma Intl to Washington Dulles Intl

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest month to fly from Seattle to Washington Dulles Intl Airport?

August can be a great time to fly to Washington Dulles Intl Airport from Seattle with a flight ticket averaging about $308. Cheapflights users have found deals in the month of August for as cheap as $137. The most expensive prices can be found in the month of December.

When is the cheapest time to fly from Seattle to Washington Dulles Intl Airport (SEA - IAD)?

When flying from Seattle to Washington Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

To save on the cost of your flight from Seattle to Washington Dulles Intl Airport, book at least 61 days before your planned departure. Booking around this time can save you about 53% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $376 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $478.

Cheap flights from Seattle to Dulles Intl in November, December 2021

The best prices found for SEA to IAD flights for November, December
2 Dec - 3 Dec
$218pp
SEA
Seattle/Tacoma Intl
United Airlines
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
2 Dec - 3 Dec
$227pp
SEA
Seattle/Tacoma Intl
United Airlines
   
2 STOPS
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
29 Nov - 30 Nov
$242pp
SEA
Seattle/Tacoma Intl
United Airlines
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United Airlines
Non-Stop
SEA
Seattle/Tacoma Intl

Seattle/Tacoma Intl to Dulles Intl 2022 flight deals

Cheap flights to Dulles Intl from Seattle found for next year
2 Dec - 3 Dec
$218pp
SEA
Seattle/Tacoma Intl
United Airlines
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
2 Dec - 3 Dec
$227pp
SEA
Seattle/Tacoma Intl
United Airlines
   
2 STOPS
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
29 Nov - 30 Nov
$242pp
SEA
Seattle/Tacoma Intl
United Airlines
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United Airlines
Non-Stop
SEA
Seattle/Tacoma Intl

Non-stop flights to Dulles Intl from Seattle

Save time with Seattle to Dulles Intl direct flight deals
10 Jan - 13 Jan
$232pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
8 Dec - 15 Dec
$249pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
Non-Stop
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Delta
Non-Stop
SEA
Seattle/Tacoma Intl
7 Dec - 14 Dec
$251pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl

Last minute flights from Seattle to Dulles Intl

Late deals on round-trip flights to Dulles Intl from Seattle, departing today and this week
2 Dec - 3 Dec
$218pp
SEA
Seattle/Tacoma Intl
United Airlines
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
2 Dec - 3 Dec
$227pp
SEA
Seattle/Tacoma Intl
United Airlines
   
2 STOPS
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
29 Nov - 30 Nov
$242pp
SEA
Seattle/Tacoma Intl
United Airlines
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United Airlines
Non-Stop
SEA
Seattle/Tacoma Intl

One-way flights to Dulles Intl from Seattle

The cheapest one-way flights from Seattle to Dulles Intl
6:55 pm - 1:33 pm
United Airlines
2 Stops
15h 38m
SEA - IAD
United Airlines
$182
United
2:40 am - 12:20 pm
Alaska Airlines
2 Stops
30h 40m
SEA - IAD
Alaska Airlines
2:32 am - 6:39 am
Delta
2 Stops
25h 07m
SEA - IAD
Delta
$190
Delta

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Seattle</span> to <span class="emphasized">Dulles Intl</span> flights.

Flight FAQs

From Seattle to Dulles Intl

What airport do you fly from for flights from Seattle to Washington Dulles Intl?

If you book a flight to Washington Dulles Intl from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 7 flights from Seattle/Tacoma Intl to Washington Dulles Intl per day from 8 different airlines.

Which airlines flying from Seattle/Tacoma Intl to Washington Dulles Intl have flexible cancellations due to COVID-19?

Due to the rapidly changing circumstances due to COVID-19, airlines like United Airlines, Alaska Airlines, and Delta flying from Seattle/Tacoma Intl to Washington Dulles Intl have implemented new flexible cancellation policies.

Can I find flights from Seattle to Washington Dulles Intl Airport for under $300 on Cheapflights?

Yes, there are multiple flights from Seattle to Washington Dulles Intl Airport for under $300. The cheapest flight booked recently is on Alaska Airlines for just $232, but on average you can expect to pay $268.

Are there nonstop flights from Seattle to Washington Dulles Intl Airport for under $300 on Cheapflights?

Cheapflights has at least 20 direct flights from Seattle to Washington Dulles Intl Airport under $300. A good price for a nonstop flight from Seattle to Washington Dulles Intl Airport is less than $301.

Are there last-minute flights available from Seattle to Washington Dulles Intl Airport for under $300?

There are currently 20+ open flights from Seattle to Washington Dulles Intl Airport within the next 7 days for less than $300.

What days are nonstop flights available from Seattle to Washington Dulles Intl Airport?

Days when nonstop flights are available for this flight are: Monday, Wednesday, Saturday.

How many flights depart from Seattle to Washington Dulles Intl Airport on average per day?

On average, you can expect to see 6 flights from Seattle to Washington Dulles Intl Airport a day.
Morning (6am - Noon) - 50% of flight departures
Afternoon (Noon - 6pm) - 50% of flight departures

How long is the flight from Seattle to Washington Dulles Intl Airport?

Alaska Airlines, Delta, and American Airlines can get you from Seattle to Washington Dulles Intl Airport in just under 4h 55m. Your travel time can differ by up to 3h 13m. Seattle and Washington Dulles Intl Airport are separated by a distance of 2313 mi. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines flying from Seattle to Washington Dulles Intl Airport round-trip?

Currently priced at $232, Alaska Airlines will fly you from Seattle to Washington Dulles Intl Airport and back. In addition to Alaska Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from $260 and $270, respectively. Alaska Airlines is priced at 22% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Seattle to Washington Dulles Intl Airport one-way?

For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as $123. Users have also found prices from $129 and $136 on Delta and American Airlines, respectively.

What are the most reliable airlines from Seattle to Washington Dulles Intl Airport?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to Washington Dulles Intl Airport on time: SAS (100%), Qatar Airways (95%), Avianca (94%).

What are the most popular airlines that fly from Seattle to Washington Dulles Intl Airport?

The most popular airlines flying from Seattle to Washington Dulles Intl Airport are Major Airline, American Airlines and Alaska Airlines. Something to consider prior to booking your flight.

What are the cheapest flights from Seattle to Washington Dulles Intl Airport?

Looking at all options, your cheapest flight can be booked for $128. While the most popular route (Seattle/Tacoma Intl - Washington Dulles Intl) can be booked for $251 on average our data indicates $451 when flying from Seattle to Washington Dulles Intl Airport.

Related searches

Flights to Dulles Intl from Seattle (SEA)
Flights to Seattle Flights to Dulles Intl Flights from Seattle Flights from Dulles Intl

Rent a Car

Car Rentals at Dulles Intl

COVID Restrictions

View COVID Travel Restrictions for Dulles Intl (IAD)

Do I need a COVID test to fly to Dulles Intl from Seattle?

Information is based on travel restrictions for travel to Washington Dulles Intl within the United States

Most visitors from Seattle/Tacoma Intl need to provide a negative COVID-19 test result and/or quarantine to enter Washington Dulles Intl.

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Washington Dulles Intl.

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering Washington Dulles Intl.

Do I need a test to fly back to Seattle from Dulles Intl?

Returning to Seattle/Tacoma Intl from Washington Dulles Intl

COVID-19 testing requirements
Visitors from Washington Dulles Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Seattle/Tacoma Intl.

Quarantine requirements
Visitors from Washington Dulles Intl are not required to quarantine after entering Seattle/Tacoma Intl.

Hide COVID Travel Restrictions for Dulles Intl (IAD)

Alternative routes for Seattle to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Dulles Intl

Things to know before you go - useful duration and weather info for your trip from Seattle to Dulles Intl.
Flight duration from SEA to Washington Dulles Intl
5h 26m
Average temperature for November in Dulles Intl
59.0 °F
Avg rainfall for November in Dulles Intl
3.7 ″

Airports servicing Seattle

Airports servicing Washington

Top 7 airlines flying from Seattle/Tacoma Intl to Washington Dulles Intl

The chart below displays the airlines Cheapflights users traveling from Seattle to Dulles Intl choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Frontier
$114 $333 No cancel fee 62%
Sun Country Air
$126 $259 No cancel fee 83%
Spirit Airlines
$127 $286 No cancel fee 65%
Delta
$128 $316 No cancel fee N/A
Alaska Airlines
$128 $334 No cancel fee 75%
United Airlines
$143 $401 No cancel fee 69%
American Airlines
$170 $417 No cancel fee 71%

Hourly flight availability from Seattle to Dulles Intl

See what time of day planes typically take off from Seattle towards Dulles Intl.
Afternoon Noon to 6 PM 61% of SEA to IAD departures
Morning 6 AM to noon 38% of SEA to IAD departures
Early morning Midnight to 6 AM 1% of SEA to IAD departures
Evening 6 PM to midnight 0% of SEA to IAD departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Seattle to Dulles Intl
See how many times per day planes take to the skies headed from Seattle to Dulles Intl.
Sunday
6 daily flights
Monday
10 daily flights
Tuesday
10 daily flights
Wednesday
11 daily flights
Thursday
0 flights
Friday
4 daily flights
Saturday
9 daily flights
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