Distance from ROA to IAD
Driving route: -- ( - )
Driving route: -- ( - )
Extended route information
The flight distance between airports Roanoke–Blacksburg Regional Airport (ROA) and Washington Dulles International Airport (IAD) is 176.93 mi (284.74 km). This corresponds to an approximate flight time of 0h 50min. Similar flight routes: ROA → DCA , ROA → BWI , ROA → RIC , ROA → PHL , GSO → IAD
Bearing: 50.75° (NE)The initial bearing on the course from ROA to IAD is 50.75° and the compass direction is NE.
Midpoint: 38.14173,-78.72958The geographic midpoint between ROA and IAD is in 88.40 mi (142.27 km) distance between both points in a bearing of 50.75°. It is located in United States of America, Virginia, Albemarle County.
Distance: 176.80 mi (284.53 km)The shortest distance (air line) between ROA and IAD is 176.80 mi (284.53 km).
Driving route: -- ( - )The shortest route between ROA and IAD is according to the route planner. The driving time is approx. . Half of the trip is reached in .
Time difference: 0hROA and IAD are both in the same time zone America/New_York.
How is the distance calculated?
To calculate the distance between ROA and IAD, the place names are converted into coordinates (latitude and longitude). The respective geographic centre is used for cities, regions and countries. To calculate the distance the Haversine formula is applied.
Similar routes:
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