Great-circle route ORD ↔ IAH. Faint dots are other airports, for geographic context. Download this map — free to reuse with a link back to this page.
Frequencies below are per direction, from our most recent schedule sample.
| Direction | Frequency | Days | Airlines |
|---|---|---|---|
| ORD → IAH Chicago to Houston |
125/wk | Daily | American Airlines, Frontier Airlines, United Airlines |
| IAH → ORD Houston to Chicago |
125/wk | Daily | American Airlines, Frontier Airlines, United Airlines |
Where a direction shows “—” we track it as an operating nonstop but hold no schedule sample for it — we would rather show nothing than guess.
In 2025, airlines reported 1,658,499 passengers on 11,548 flights between ORD and IAH — about 4,546 a day — filling 84% of the 1,981,204 seats flown. United Air Lines Inc. carried the most passengers (73%).
Source: US DOT T-100 segment reports — actual airline-reported traffic, scheduled service only, both directions combined. Cargo and charter flights excluded.
3 airlines fly the ORD–IAH nonstop, including American Airlines, Frontier Airlines, United Airlines.
Recent scheduled departures on this route have used the Boeing 737-900, Airbus A320, Airbus A319, Boeing 737 and 2 other types.
Aircraft assignments change by season and by time of day.
The distance between Chicago O'Hare International Airport and George Bush Intercontinental Houston Airport is 926 miles, or 1,490 kilometres.
| Great-circle distance | 926 mi |
| Kilometres | 1,490 km |
| Nautical miles | 805 nmi |
Measured airport to airport. The actual track is longer — aircraft follow airways, avoid restricted airspace and route around weather.
Yes. 3 airlines fly the route nonstop, with about 250 departures a week across both directions. The route is in our live nonstop dataset, last seeded 2026-07-07.
About 2h 25m in the air. That is a great-circle estimate from the 926-mile distance, not a scheduled block time — an airline's published time will differ by roughly 15 to 45 minutes depending on routing, winds and taxi.
About 125 a week from Chicago to Houston and 125 a week from Houston to Chicago, from our most recent schedule sample.
American Airlines, Frontier Airlines, United Airlines.
In 2025, airlines reported 1,658,499 passengers on 11,548 scheduled flights between ORD and IAH — about 4,546 a day — filling 84% of the seats flown. Source: US DOT T-100 segment reports, both directions combined.
Recent scheduled departures have used the Boeing 737-900, Airbus A320, Airbus A319, Boeing 737. Assignments change by season and by time of day.
