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IAD to IAH: distance & flight time
Washington (Washington Dulles International Airport) → Houston (George Bush Intercontinental Houston Airport)
1,189 mi
1,913 km · 1,033 nm
3h 3m
estimated nonstop flight time
-1h
time difference · heading southwest
See live IAD→IAH fares Phone-only fares on this route — call free
Flight time details
1,189 miles nonstop takes roughly 3h 3m gate to gate, flying southwest. 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
- IAH — George Bush Intercontinental Houston Airport · Houston, 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
Near IAH
- DWH · David Wayne Hooks Memorial Airport14 mi away
- IWS · West Houston Airport23 mi away
- AAP · Andrau Airpark23 mi away
- HOU · William P Hobby Airport24 mi away
Frequently asked questions
How far is IAD from IAH?
The flight distance from Washington (IAD) to Houston (IAH) is 1,189 miles (1,913 km, 1,033 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAD to IAH?
A nonstop flight takes about 3h 3m 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 Houston?
Houston is 1 hour behind Washington.
What is the cheapest way to fly from IAD to IAH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAD–IAH that never appear on search engines, with no booking fees.