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Distance from Marion, TX to IAD Airport

Distance

1,583 mi

Time

1 day 4 hours

Gas Cost

$139 - $270

Helpful Inaccurate

There are 1,342.73 miles from Marion to Washington Dulles International Airport (IAD) in northeast direction and 1,583 miles (2,547.59 kilometers) by car, following the I-40 route.

Marion and IAD Airport are 1 day 4 hours far apart, if you drive non-stop .

This is the fastest route from Marion, TX to IAD Airport. The halfway point is Cottondale, AL.

Please note the time difference between Marion, TX and IAD Airport is 1 hour. The current time in Marion is 12:25 am and the current time in IAD Airport is 1:25 am.

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Lowest Price Rental Cars in Marion, TX

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Marion »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 63.59 gallons of gas to cover the route between Marion, TX and IAD Airport.

The estimated cost of gas to go from Marion to IAD Airport is $194.91.

During the route, an average car will release 1,245.88 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 $3.07 per gallon of regular gas. Price last updated on March 10, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Marion, TX and IAD Airport

If you want to meet halfway between Marion, TX 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 33.160046 and -87.500481, or 33º 9' 36.1656" N, 87º 30' 1.7316" W. This location is 791.71 miles away from Marion, TX and IAD Airport and it would take approximately 14 hours 3 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Cottondale, AL, situated 791 miles from Marion, TX and 782 miles from IAD Airport. It would take 11 hours 51 mins to go from Marion to Cottondale and 11 hours 54 mins to go from IAD to Cottondale.