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DEC to IAD: distance & flight time
Decatur (Decatur Airport) → Washington (Washington Dulles International Airport)
612 mi
985 km · 532 nm
1h 48m
estimated nonstop flight time
+1h
time difference · heading east
See live DEC→IAD fares Phone-only fares on this route — call free
Flight time details
612 miles nonstop takes roughly 1h 48m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- DEC — Decatur Airport · Decatur, United States
- IAD — Washington Dulles International Airport · Washington, 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 DEC
Frequently asked questions
How far is DEC from IAD?
The flight distance from Decatur (DEC) to Washington (IAD) is 612 miles (985 km, 532 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from DEC to IAD?
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 Decatur and Washington?
Washington is 1 hour ahead of Decatur.
What is the cheapest way to fly from DEC to IAD?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on DEC–IAD that never appear on search engines, with no booking fees.