Distance between cities › USA › Missouri › Thayer, MO › Distance from Thayer to Washington Dulles International Airport Book Hotels

Distance from Thayer, MO to IAD Airport

Distance

939 mi

Time

18 hours 14 mins

Gas Cost

$88 - $170

Helpful Inaccurate

There are 786.64 miles from Thayer to Washington Dulles International Airport (IAD) in northeast direction and 939 miles (1,511.17 kilometers) by car, following the I-64 route.

Thayer and IAD Airport are 18 hours 14 mins far apart, if you drive non-stop .

This is the fastest route from Thayer, MO to IAD Airport. The halfway point is Concord Farragut, TN.

Please note the time difference between Thayer, MO and IAD Airport is 1 hour. The current time in Thayer is 7:41 pm and the current time in IAD Airport is 8:41 pm.

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Lowest Price Rental Cars in Thayer, MO

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Thayer »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 37.72 gallons of gas to cover the route between Thayer, MO and IAD Airport.

The estimated cost of gas to go from Thayer to IAD Airport is $123.03.

During the route, an average car will release 738.92 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 Thayer, MO and IAD Airport

If you want to meet halfway between Thayer, 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 35.909008 and -84.230362, or 35º 54' 32.4288" N, 84º 13' 49.3032" W. This location is 469.56 miles away from Thayer, MO and IAD Airport and it would take approximately 9 hours 7 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Concord Farragut, TN, situated 490 miles from Thayer, MO and 493 miles from IAD Airport. It would take 8 hours 33 mins to go from Thayer to Concord Farragut and 7 hours 40 mins to go from IAD to Concord Farragut.

Major City Closest to Halfway Point

The major city closest to the halfway point between Thayer, MO and IAD Airport is Knoxville, TN, situated 503 miles from Thayer, MO and 478 miles from IAD Airport. It would take 8 hours 45 mins to go from Thayer to and 7 hours 21 mins to go from IAD to Knoxville.