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Distance from Henley, MO to IAD Airport

Distance

938 mi

Time

18 hours 24 mins

Gas Cost

$87 - $170

Helpful Inaccurate

There are 802.39 miles from Henley to Washington Dulles International Airport (IAD) in east direction and 938 miles (1,509.56 kilometers) by car, following the I-70 route.

Henley and IAD Airport are 18 hours 24 mins far apart, if you drive non-stop .

This is the fastest route from Henley, MO to IAD Airport. The halfway point is Lewisburg, OH.

Please note the time difference between Henley, MO and IAD Airport is 1 hour. The current time in Henley is 4:36 am and the current time in IAD Airport is 5:36 am.

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Lowest Price Rental Cars in Henley, MO

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Henley »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 37.68 gallons of gas to cover the route between Henley, MO and IAD Airport.

The estimated cost of gas to go from Henley to IAD Airport is $122.91.

During the route, an average car will release 738.20 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 $3.26 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Henley, MO and IAD Airport

If you want to meet halfway between Henley, MO 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 39.848110 and -84.590820, or 39º 50' 53.196" N, 84º 35' 26.952" W. This location is 469.10 miles away from Henley, MO and IAD Airport and it would take approximately 9 hours 12 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Lewisburg, OH, situated 477 miles from Henley, MO and 496 miles from IAD Airport. It would take 7 hours 37 mins to go from Henley to Lewisburg and 7 hours 47 mins to go from IAD to Lewisburg.

Major City Closest to Halfway Point

The major city closest to the halfway point between Henley, MO and IAD Airport is Dayton, OH, situated 499 miles from Henley, MO and 480 miles from IAD Airport. It would take 8 hours 1 min to go from Henley to and 7 hours 34 mins to go from IAD to Dayton.