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$129+ Cheap flights from Seattle (SEA) to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — IAD
jul. 30 — ago. 61
From?
To?
mar. 7/30
mar. 8/6
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to Washington, D.C. Dulles Intl are usually found in January or February, booked 42 days in advance, depart on a Friday or Thursday and return on a Tuesday

Cheap flight deals from Seattle to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated julio 25, 2024.

Popular in

June

Cheapest in

January

Round-trip from

$189

One-way from

$129
(Delta)
High demand for flights, 18% potential price rise
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Best time to find cheap flights, 25% potential price drop
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From Seattle/Tacoma Intl to Washington, D.C. Dulles Intl
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One-way flight from Seattle/Tacoma Intl to Washington, D.C. Dulles Intl
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What is the cheapest day to fly round-trip from Seattle to Washington, D.C. Dulles Intl Airport?

Leaving on a Thursday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 21% on the overall cost on flights from Seattle to Washington, D.C. Dulles Intl Airport.

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

To save on the cost of your flight from Seattle to Washington, D.C. Dulles Intl Airport, book at least 43 days before your planned departure. Booking around this time can save you about 69% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $442 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $635.

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

February can be a great time to fly to Washington, D.C. Dulles Intl Airport from Seattle with a flight ticket averaging about $395. Cheapflights users have found deals in the month of February for as cheap as $125. The most expensive prices can be found in the month of June.

What is the cheapest time of day to fly from SEA to IAD?

A simple way to save on the total cost of your ticket is to fly from Seattle to Washington, D.C. Dulles Intl Airport in the afternoon. If you’re flexible enough to do this you can expect to save up to 17% on your trip compared to booking a flight at noon.

Cheap Seattle to Dulles Intl flights in July & August 2024

Find cheap flight options from Seattle to Dulles Intl specifically for the months of July and August 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,752,877 searches. Prices were last updated on julio 25, 2024.
Scroll through some of the best deals on flights from Seattle to Washington, D.C. in 2024. Check back regularly for other flight deals.
This Alaska Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/297:07 amSEA - IAD
Nonstop5h 08mAlaska Airlines
dom. 9/87:00 amIAD - SEA
Nonstop5h 39mAlaska Airlines
Deal found 7/25$278
This American Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/2810:18 amSEA - IAD
1 stop10h 04mAmerican Airlines
mar. 9/31:17 pmIAD - SEA
1 stop10h 41mAmerican Airlines
Deal found 7/25$286
This Alaska Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/2910:00 amSEA - IAD
Nonstop5h 07mAlaska Airlines
dom. 9/86:03 pmIAD - SEA
1 stop8h 39mAlaska Airlines
Deal found 7/25$287
This Alaska Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/287:07 amSEA - IAD
Nonstop5h 08mAlaska Airlines
dom. 9/17:09 pmIAD - SEA
Nonstop5h 51mAlaska Airlines
Deal found 7/25$288
This Alaska Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/287:07 amSEA - IAD
Nonstop5h 08mAlaska Airlines
dom. 9/16:03 pmIAD - SEA
1 stop17h 51mAlaska Airlines
Deal found 7/25$297
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/216:45 pmSEA - IAD
1 stop7h 39mUnited Airlines
dom. 8/2512:40 pmIAD - SEA
Nonstop5h 48mUnited Airlines
Deal found 7/25$298
This Delta deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/309:59 pmSEA - IAD
Nonstop4h 57mDelta
lun. 9/27:25 amIAD - SEA
Nonstop5h 46mDelta
Deal found 7/25$299
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/216:45 pmSEA - IAD
1 stop7h 39mUnited Airlines
mié. 8/285:26 pmIAD - SEA
Nonstop5h 48mUnited Airlines
Deal found 7/25$303
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/216:45 pmSEA - IAD
1 stop7h 39mUnited Airlines
dom. 8/257:00 amIAD - SEA
1 stop9h 06mUnited Airlines
Deal found 7/25$307

Seattle to Dulles Intl 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Dulles Intl in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated julio 25, 2024.
Scroll through some of the best deals on flights from Seattle to Washington, D.C. in 2024. Check back regularly for other flight deals.
This deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/57:07 amSEA - IAD
Nonstop5h 09mAlaska Airlines
mié. 9/114:16 pmIAD - SEA
1 stop10h 26mAlaska Airlines
Deal found 7/24$189
This deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/59:15 pmSEA - IAD
1 stop16h 18mAlaska Airlines
mié. 9/117:09 pmIAD - SEA
Nonstop5h 51mAlaska Airlines
Deal found 7/25$191
This deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/57:07 amSEA - IAD
Nonstop5h 09mAlaska Airlines
mié. 9/114:16 pmIAD - SEA
1 stop10h 26mAlaska Airlines
Deal found 7/24$193
This Alaska Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/117:07 amSEA - IAD
Nonstop5h 09mAlaska Airlines
mié. 9/117:09 pmIAD - SEA
Nonstop5h 51mAlaska Airlines
Deal found 7/24$251
This Alaska Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/54:06 pmSEA - IAD
Nonstop4h 53mAlaska Airlines
mar. 9/104:13 pmIAD - SEA
Nonstop5h 46mAlaska Airlines
Deal found 7/25$257
This flugladen.de deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/54:06 pmSEA - IAD
Nonstop4h 53mAlaska Airlines
mié. 9/114:16 pmIAD - SEA
1 stop10h 26mAlaska Airlines
Deal found 7/24$260
This Sun Country Air deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/115:42 pmSEA - IAD
1 stop13h 31mSun Country Air
vie. 9/136:00 pmIAD - SEA
1 stop21h 16mSun Country Air
Deal found 7/25$265
This Alaska Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/264:06 pmSEA - IAD
Nonstop4h 53mAlaska Airlines
mié. 10/29:00 amIAD - SEA
1 stop10h 50mAlaska Airlines
Deal found 7/25$266
This Alaska Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/2810:00 amSEA - IAD
Nonstop5h 09mAlaska Airlines
mié. 10/167:02 amIAD - SEA
Nonstop5h 51mAlaska Airlines
Deal found 7/23$267

Seattle to Dulles Intl flights leaving soon

Find last-minute flight options from Seattle to Dulles Intl for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated julio 25, 2024.
Consider one of these great deals we found on last-minute flights from Seattle to Washington, D.C.. To prevent any unwanted surprises, users should verify their flight info before booking.
This Sun Country Air deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/76:05 pmSEA - IAD
1 stop14h 12mSun Country Air
mié. 8/1411:30 amIAD - SEA
1 stop23h 29mSun Country Air
Deal found 7/24$370
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/611:20 pmSEA - IAD
Nonstop4h 59mUnited Airlines
mar. 8/138:43 amIAD - SEA
Nonstop5h 47mUnited Airlines
Deal found 7/23$373
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/66:35 pmSEA - IAD
1 stop7h 50mUnited Airlines
mar. 8/1310:10 pmIAD - SEA
Nonstop5h 44mUnited Airlines
Deal found 7/23$383
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/89:59 pmSEA - IAD
Nonstop4h 57mDelta
lun. 8/197:25 amIAD - SEA
Nonstop5h 46mDelta
Deal found 7/24$384
This Cheapflightsfares deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/76:05 pmSEA - IAD
1 stop14h 12mSun Country Air
dom. 8/111:53 pmIAD - SEA
1 stop12h 00mSun Country Air
Deal found 7/24$387
This Sun Country Air deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/66:30 pmSEA - IAD
1 stop13h 00mSun Country Air
mié. 8/1411:30 amIAD - SEA
1 stop23h 29mSun Country Air
Deal found 7/24$390
This KAYAK deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/610:10 pmSEA - IAD
2 stops34h 07mMultiple Airlines
jue. 8/2212:13 pmIAD - SEA
2 stops28h 50mMultiple Airlines
Deal found 7/23$392
This Alaska Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/87:59 pmSEA - IAD
1 stop16h 17mAlaska Airlines
lun. 8/197:02 amIAD - SEA
Nonstop5h 42mAlaska Airlines
Deal found 7/24$393
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/611:20 pmSEA - IAD
Nonstop4h 59mUnited Airlines
jue. 8/226:12 pmIAD - SEA
1 stop9h 41mUnited Airlines
Deal found 7/23$394

One-way flights to Dulles Intl from Seattle

Search for one-way flight options from Seattle to Dulles Intl. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated julio 25, 2024.
Take a look at some of the best available options we've come across on one-way flights from Seattle to Washington, D.C.. Users can also find round-trip Seattle to Washington, D.C. flights by using the search form above.
This Delta deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/129:55 pmSEA - IAD
Nonstop5h 06mDelta
Deal found 7/25$129
This Cheapflightsfares deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/246:30 pmSEA - IAD
1 stop14h 26mSun Country Air
Deal found 7/24$130
This Sun Country Air deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/136:35 pmSEA - IAD
1 stop22h 51mSun Country Air
Deal found 7/25$138
This United Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/2710:50 pmSEA - IAD
Nonstop5h 05mUnited Airlines
Deal found 7/24$139
This Cheapflightsfares deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/96:10 pmSEA - IAD
1 stop12h 52mSun Country Air
Deal found 7/25$140
This American Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/16:00 amSEA - IAD
2 stops11h 46mAmerican Airlines
Deal found 7/24$143
This Alaska Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/129:15 pmSEA - IAD
1 stop16h 18mAlaska Airlines
Deal found 7/25$144
This Cheapflightsfares deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/285:55 pmSEA - IAD
1 stop14h 11mSun Country Air
Deal found 7/24$145
This American Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/275:29 amSEA - IAD
1 stop8h 09mAmerican Airlines
Deal found 7/24$148

Find flights from Seattle to Dulles Intl within your budget

Customize your flight search to find flights from Seattle to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated julio 25, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$189 - $281

Route

Depart

Return

Price

Seattle/Tacoma IntlWashington, D.C. Dulles Intl

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

jue. 9/5

Nonstop5h 09m

Washington, D.C. Dulles Intl

mié. 9/11

1 stop10h 26m

$189

Seattle/Tacoma IntlWashington, D.C. Dulles Intl

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

jue. 9/5

1 stop16h 18m

Washington, D.C. Dulles Intl

mié. 9/11

Nonstop5h 51m

$191

Seattle/Tacoma IntlWashington, D.C. Dulles Intl

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

jue. 9/5

Nonstop5h 09m

Washington, D.C. Dulles Intl

mié. 9/11

1 stop10h 26m

$193

Seattle/Tacoma IntlWashington, D.C. Dulles Intl

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

mié. 9/11

1 stop13h 31m

Washington, D.C. Dulles Intl

vie. 9/13

1 stop21h 16m

$265

Seattle/Tacoma IntlWashington, D.C. Dulles Intl

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

jue. 10/24

1 stop14h 26m

Washington, D.C. Dulles Intl

dom. 10/27

1 stop8h 31m

$270

Seattle/Tacoma IntlWashington, D.C. Dulles Intl

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

mar. 9/24

1 stop9h 22m

Washington, D.C. Dulles Intl

mié. 9/25

1 stop8h 17m

$272

Seattle/Tacoma IntlWashington, D.C. Dulles Intl

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

vie. 1/17

Nonstop5h 00m

Washington, D.C. Dulles Intl

mar. 1/21

Nonstop6h 04m

$277

Seattle/Tacoma IntlWashington, D.C. Dulles Intl

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

mié. 9/11

Nonstop5h 09m

Washington, D.C. Dulles Intl

dom. 9/15

1 stop7h 40m

$280

Seattle/Tacoma IntlWashington, D.C. Dulles Intl

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

mié. 9/4

1 stop8h 00m

Washington, D.C. Dulles Intl

mié. 9/11

2 stops11h 40m

$281

Flights are sorted by cheapest first

Deals found on 7/24

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Dulles Intl. Price data was last updated on July 23, 2024.
Booking 42 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Washington, D.C. Dulles Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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What is the cheapest day to fly from Seattle to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Dulles Intl. Price data was last updated on July 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to Washington, D.C. Dulles Intl Airport flight should consider departing on Thursday afternoons when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
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Best time to book a flight from Seattle to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature and rainfall totals by month.

WAS

Temperature

35.6 - 80.6 °F

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated julio 25, 2024.
Get a feel of what it's like to fly with United Airlines, Delta and Sun Country Air from Seattle to Washington, D.C. by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,365 reviews

Boarding

8.2

Food

7.2

Comfort

7.9

Overall

8.1

Entertainment

7.2

Crew

8.6

Reviews

1 / 10

There was no announcement to close your windows and were turning out the lights!.

Alaska Airlines
8.1
Very good
9,365 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Boarding

8.2

Food

7.2

Comfort

7.9

Overall

8.1

Entertainment

7.2

Crew

8.6

Reviews

1 / 10

There was no announcement to close your windows and were turning out the lights!.

Delta
8.0
Very good
9,630 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Boarding

8.2

Food

7.2

Comfort

7.9

Overall

8.1

Entertainment

7.2

Crew

8.6

Reviews

1 / 10

There was no announcement to close your windows and were turning out the lights!.

United Airlines
7.4
Good
10,000 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Boarding

8.2

Food

7.2

Comfort

7.9

Overall

8.1

Entertainment

7.2

Crew

8.6

Reviews

1 / 10

There was no announcement to close your windows and were turning out the lights!.

American Airlines
7.3
Good
10,000 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Boarding

8.2

Food

7.2

Comfort

7.9

Overall

8.1

Entertainment

7.2

Crew

8.6

Reviews

1 / 10

There was no announcement to close your windows and were turning out the lights!.

Sun Country Air
7.1
Good
515 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Boarding

8.2

Food

7.2

Comfort

7.9

Overall

8.1

Entertainment

7.2

Crew

8.6

Reviews

1 / 10

There was no announcement to close your windows and were turning out the lights!.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Washington, D.C. Dulles Intl?

    If you book a flight to Washington, D.C. 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 15 flights from Seattle/Tacoma Intl to Washington, D.C. Dulles Intl per day from 4 different airlines.

  • Can I find flights from Seattle to Washington, D.C. Dulles Intl Airport for under $200 on Cheapflights?

    Yes, there are multiple flights from Seattle to Washington, D.C. Dulles Intl Airport for under $200. The cheapest flight booked recently is on Alaska Airlines for just $189, but on average you can expect to pay $259.

  • Are there nonstop flights from Seattle to Washington, D.C. Dulles Intl Airport for under $300 on Cheapflights?

    Cheapflights has at least 20 direct flights from Seattle to Washington, D.C. Dulles Intl Airport under $300. A good price for a nonstop flight from Seattle to Washington, D.C. Dulles Intl Airport is less than $309.

  • Are there last-minute flights available from Seattle to Washington, D.C. Dulles Intl Airport for under $400?

    There are currently 20+ open flights from Seattle to Washington, D.C. Dulles Intl Airport within the next 7 days for less than $400.

  • What days are nonstop flights available from Seattle to Washington, D.C. Dulles Intl Airport?

    Nonstop flights can be found on the following days: Monday, Tuesday, Thursday, Friday, Saturday.

  • How many flights depart from Seattle to Washington, D.C. Dulles Intl Airport on average per day?

    Per day, 9 flights depart from Seattle to Washington, D.C. Dulles Intl Airport on average.
    Morning (6am - Noon) - 56% of flight departures
    Afternoon (Noon - 6pm) - 44% of flight departures

  • How long is the flight from Seattle to Washington, D.C. Dulles Intl Airport?

    Airlines like Alaska Airlines, Sun Country Air, and United Airlines fly from Seattle to Washington, D.C. Dulles Intl Airport in about 5h 09m. The time it takes to get you to your destination can typically vary by up to 8h 22m. The distance between Seattle and Washington, D.C. Dulles Intl Airport is about 2313 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Seattle to Washington, D.C. Dulles Intl Airport round-trip?

    Alaska Airlines, at $189, was found to be the cheapest airline from Seattle to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include Sun Country Air and United Airlines. Alaska Airlines is 52% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Seattle to Washington, D.C. Dulles Intl Airport one-way?

    The cheapest airlines for a one-way flight from Seattle to Washington, D.C. Dulles Intl Airport are Delta ($129), Sun Country Air ($130), and United Airlines ($139).

  • What are the most reliable airlines from Seattle to Washington, D.C. 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, D.C. Dulles Intl Airport on time: Iberia (94%), Austrian Airlines (87%), Brussels Airlines (87%).

  • What are the cheapest flights from Seattle to Washington, D.C. Dulles Intl Airport?

    Looking at all options, your cheapest flight can be booked for $144. While the most popular route (Seattle/Tacoma Intl - Washington, D.C. Dulles Intl) can be booked for $257 on average our data indicates $773 when flying from Seattle to Washington, D.C. Dulles Intl Airport.

  • What does SEA to IAD mean?

    SEA and IAD are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. SEA to IAD refers to a flight route from Seattle/Tacoma Intl Airport to Washington, D.C. Dulles Intl Airport.

  • Can I find deals for flights from Seattle to Dulles Intl that include extra baggage allowance?

    The amount of baggage you can bring on your Seattle to Dulles Intl flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Seattle to Dulles Intl with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to Dulles Intl flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Seattle to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Seattle to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Dulles Intl.

  • Can I find deals for business class flights from Seattle to Dulles Intl?

    Yes. Cheapflights offers flight deals from Seattle to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Seattle to Dulles Intl that allow pets onboard?

    Many airlines flying from Seattle to Dulles Intl offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Seattle to Dulles Intl?

    Yes, you can often find last-minute deals on Seattle to Dulles Intl flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Seattle to Washington, D.C. Dulles Intl Airport flight deals updated?

    The Seattle to Washington, D.C. Dulles Intl Airport flight deals you see on this page were last updated on 7/25.

  • What are the most popular airlines that fly from Seattle to Washington, D.C. Dulles Intl Airport?

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

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

    Currently, September is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Dulles Intl Airport (average of $278). Flying from Seattle to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $378). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Seattle to Dulles Intl
See prices for flight routes from nearby airports that may be better suited for you.

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Top 4 airlines flying from Seattle to Dulles Intl

Discover the top 4 airlines that operate flights from Seattle to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated julio 25, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$149Average$390FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$159Average$393FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$218Average$405FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$338Average$488FlexibilityNo cancel feeOn-time71%
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Search flights from Seattle to Dulles Intl by cabin class

Find flights from Seattle to Dulles Intl, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
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Hourly flight availability from Seattle to Dulles Intl

Find hourly flight availability from Seattle to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 25, 2024.
1%of flight departuresEarly morningMidnight to 6 am
36%of flight departuresMorning6 am to noon
18%of flight departuresAfternoonNoon to 6 pm
45%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Seattle to Dulles Intl

Explore weekly flight availability from Seattle to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated julio 25, 2024.
Sunday16daily flights
Monday17daily flights
Tuesday14daily flights
Wednesday15daily flights
Thursday14daily flights
Friday16daily flights
Saturday16daily flights

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