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Distance from Erwin, TN to IAD Airport

Distance

412 mi

Time

7 hours 40 mins

Gas Cost

$38 - $73

Helpful Inaccurate

There are 333.79 miles from Erwin to Washington Dulles International Airport (IAD) in northeast direction and 412 miles (663.05 kilometers) by car, following the I-81 and US-11 route.

Erwin and IAD Airport are 7 hours 40 mins far apart, if you drive non-stop .

This is the fastest route from Erwin, TN to IAD Airport. The halfway point is Lithia, VA.

Erwin, TN and IAD Airport are in the same time zone (EDT). Current time in both locations is 1:17 pm.

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Lowest Price Rental Cars in Erwin, TN

Planning on renting a car to go from Erwin, TN to IAD Airport? Here there are some offers to rent a car in Erwin, TN

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Erwin »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 16.55 gallons of gas to cover the route between Erwin, TN and IAD Airport.

The estimated cost of gas to go from Erwin to IAD Airport is $53.03.

During the route, an average car will release 324.30 pounds of CO₂ to the atmosphere. The carbon footprint would be 0.79 pounds of CO₂ per mile.

Average USA gas price used for calculation is $3.20 per gallon of regular gas. Price last updated on March 11, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Erwin, TN and IAD Airport

If you want to meet halfway between Erwin, TN 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 37.499596 and -79.755981, or 37º 29' 58.5456" N, 79º 45' 21.5316" W. This location is 206.08 miles away from Erwin, TN and IAD Airport and it would take approximately 3 hours 50 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Lithia, VA, situated 202 miles from Erwin, TN and 208 miles from IAD Airport. It would take 3 hours 16 mins to go from Erwin to Lithia and 3 hours 23 mins to go from IAD to Lithia.