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IAH to DCA: distance & flight time
Houston (George Bush Intercontinental Houston Airport) → Washington (Ronald Reagan Washington National Airport)
1,206 mi
1,942 km · 1,048 nm
3h 5m
estimated nonstop flight time
+1h
time difference · heading northeast
See live IAH→DCA fares Phone-only fares on this route — call free
Flight time details
1,206 miles nonstop takes roughly 3h 5m gate to gate, flying northeast. 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
- IAH — George Bush Intercontinental Houston Airport · Houston, United States
- DCA — Ronald Reagan Washington National 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 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
Near DCA
Frequently asked questions
How far is IAH from DCA?
The flight distance from Houston (IAH) to Washington (DCA) is 1,206 miles (1,942 km, 1,048 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAH to DCA?
A nonstop flight takes about 3h 5m 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 Houston and Washington?
Washington is 1 hour ahead of Houston.
What is the cheapest way to fly from IAH to DCA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAH–DCA that never appear on search engines, with no booking fees.