Dulles to Houston (IAD–IAH) — Airlines, Schedules & Connections
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No nonstop flights on this route. connecting options below.
IAD–IAH is served by 2 airlines with nonstop service. United Airlines and ITA Airways lead the route. The flight covers 1,189 miles in approximately 3h 9m. Beyond nonstop, 202 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| UA United Airlines Also: AV, CA, EK, LX, NZ, SN | 57 | 320, 738, 739, 73G, 7M8, 7M9 | 3h09-3h49 | Star Alliance | AV, CA, EK, LX, NZ, SN | |
| AZ ITA Airways | 4 | 739 | 3h33 | SkyTeam | – |
Weekly Schedule Pattern
Connection Landscape
Other ways to reach Houston from Dulles
| Metric | IAD→IAH | DCA→IAH | BWI→IAH |
|---|---|---|---|
| Distance from IAD | – | 23 mi | 45 mi |
| Nonstop airlines | 2 | 4 | 8 |
| Weekly flights | 119 | 118 | 100 |
| Flight time | 3h 9m | 3h 26m | 3h 4m |
| Departure OTP | 78% | – | – |
Travel Essentials
IAD: EDT · IAH: CDT
When it's 6:00 PM in Dulles, it's 5:00 PM in Houston.
WMATA Silver Line Metro now reaches Dulles directly; take Silver Line to Washington Dulles Airport station (about 65 min from Metro Center, ~$7). The connection opened in late 2022.Ride-shares from downtown DC run $35–60 and take 35–50 minutes via I-66 (longer during peak hours). Washington Flyer coach to Wiehle-Reston East Metro costs $6. The airport is 27 miles from downtown; taxis are expensive ($60–80).
No direct rail from IAH. The METRO bus 102 (IAH Express) runs to downtown Houston's transit center (60–90 min, $1.25). Taxis to downtown Houston cost $50–70. Ride-hails pick up at the designated Rideshare zones outside baggage claim on the lower level.IAH has five terminals (A–E) connected by an underground tunnel with trams. Terminal D handles international arrivals. Rental car agencies are in a consolidated facility adjacent to Terminal C; a free IAH Connector bus runs between terminals and the rental car center. The Galleria / Uptown area costs $35–50 by ride-hail.
Humid subtropical climate. Hot, humid, and wet for much of the year. Summers are brutal (33–38°C) with high humidity and near-daily afternoon thunderstorms. Severe storms with hail and high winds regularly cause ground stops from April through September. Houston's flooding risk is significant. Heavy rain events, including tropical system remnants, have flooded airport roads, cutting off surface access even when the airport itself remains operational.
Winters are mild (5–18°C) with occasional ice storms. These are rare but highly disruptive when they occur. Hurricane season (June–November) requires monitoring for Gulf storms. October through March has the best flying weather.
IAD–IAH Quick Facts
Frequently Asked Questions
Flights from IAD to IAH
Washington Dulles International Airport (IAD) and George Bush Intercontinental Airport (IAH) are connected by nonstop service from ITA Airways and United Airlines. With 119 weekly departures, this is a heavily served route.
IAD to IAH Flight Duration and Schedule
Nonstop flight time from IAD to IAH ranges from 3 hours 9 minutes to 3 hours 49 minutes. The route covers a distance of 1,189 miles (1,913 km). There are approximately 119 weekly flights outbound and 94 return, totaling 213 flights per week in both directions.
Connecting Options and Alternatives
202 one-stop connections are available, with the fastest taking approximately 4 hours via MGM. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Washington (DCA), Baltimore (BWI) and Richmond (RIC).