Distance from SEA Airport to IAD Airport

Distance

2,794 mi

Time

1 day 16 hours

Gas Cost

$189 - $368

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There are 2,299.76 miles from Seattle–Tacoma International Airport (SEA) to Washington Dulles International Airport (IAD) in southeast direction and 2,794 miles (4,496.51 kilometers) by car, following the I-90 route.

SEA Airport and IAD Airport are 1 day 16 hours far apart, if you drive non-stop.

This is the fastest route from SEA Airport to IAD Airport. The halfway point is Kennebec, SD.

Please note the time difference between SEA Airport and IAD Airport is 3 hours. The current time in SEA Airport is 3:00 pm and the current time in IAD Airport is 6:00 pm.

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Gas Consumption and Emissions

A car with an MPG of will need 129.37 gallons of gas to cover the route between SEA Airport and IAD Airport.

The estimated cost of gas to go from SEA Airport to IAD Airport is $306.61.

During the route, an average car will release 2,534.63 pounds of CO2 to the atmosphere. Your carbon footprint is 0.91 pounds of CO2 per mile.


Halfway Point Between SEA Airport and IAD Airport

If you want to meet halfway between SEA Airport and IAD Airport or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.872463 and -99.775864, or 43º 52' 20.8668" N, 99º 46' 33.1104" W. This location is 1,397.20 miles away from SEA Airport and IAD Airport and it would take approximately 20 hours 18 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Kennebec, SD, situated 1371.96 miles from SEA Airport and 1426.1 miles from IAD Airport. It would take 19 hours 44 mins to go from SEA to Kennebec and 21 hours 24 mins to go from IAD to Kennebec.

Major Cities Along the Route

Some major cities along the route include Billings, MT,Spokane, WA,Bellevue, WA,Renton, WA,Kent, WA, and Sioux Falls, SD.

Best Hotels In or Near IAD Airport

Do you have where to stay when you arrive to IAD Airport? Check out our hotel recommendations:


Lowest Price Rental Cars in SEA Airport

Planning on renting a car to go from SEA Airport to IAD Airport? Here there are some offers to rent a car in or near SEA Airport:

Small

Small cars

From $14

Intermediate

Intermediate cars

From $18

Full-size

Full-size cars

From $24

SUVs

SUVs

From $28

Vans

Vans

From $40


Compare rental car prices in Seattle–Tacoma International Airport »

Weather in SEA and IAD

SEA

Light rain on Tuesday through next Sunday, with high temperatures rising to 55°F on Saturday.

Sun
Jan 20
Mon
Jan 21
Tue
Jan 22
Wed
Jan 23
Thu
Jan 24
Partly cloudy day Partly cloudy day Rain Partly cloudy day Partly cloudy day
47° 40° 45° 36° 49° 41° 52° 46° 51° 44°
43% Rain probability 21% Rain probability 94% Rain probability 87% Rain probability 13% Rain probability
3 7 degrees 3 174 degrees 7 187 degrees 8 207 degrees 1 44 degrees

IAD

Mixed precipitation throughout the week, with high temperatures rising to 51°F on Wednesday.

Sun
Jan 20
Mon
Jan 21
Tue
Jan 22
Wed
Jan 23
Thu
Jan 24
Rain Wind Partly cloudy day Rain Rain
46° 16° 23° 13° 32° 13° 51° 28° 49° 32°
91% Rain probability 3% Rain probability 2% Rain probability 97% Rain probability 98% Rain probability
13 310 degrees 18 312 degrees 1 236 degrees 12 191 degrees 9 302 degrees

Distance conversions

Checkout the distance in miles, kilometers and nautical miles between SEA Airport and IAD Airport in this table:

Distance type Miles Kilometers Nautical miles
Straight line distance 2,299.76 mi 3,701.09 km 1,998.43 nautical mi
Driving distance 2,794 mi 4,497.15 km 2,428.27 nautical mi

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