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IAD to DEC: distance & flight time
Washington (Washington Dulles International Airport) → Decatur (Decatur Airport)
612 mi
985 km · 532 nm
1h 48m
estimated nonstop flight time
-1h
time difference · heading west
See live IAD→DEC fares Phone-only fares on this route — call free
Flight time details
612 miles nonstop takes roughly 1h 48m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- IAD — Washington Dulles International Airport · Washington, United States
- DEC — Decatur Airport · Decatur, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near IAD
Frequently asked questions
How far is IAD from DEC?
The flight distance from Washington (IAD) to Decatur (DEC) is 612 miles (985 km, 532 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAD to DEC?
A nonstop flight takes about 1h 48m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Washington and Decatur?
Decatur is 1 hour behind Washington.
What is the cheapest way to fly from IAD to DEC?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAD–DEC that never appear on search engines, with no booking fees.