Houston to Chicago (IAH–ORD) — Airlines, Schedules & Connections
No flights match your filters.
No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.
Most recently operated nonstop flights — the month shown is when each was last scheduled. Most destinations remain reachable with a connection.
No discontinued nonstop flights on record for this route.
IAH–ORD is served by 6 airlines with nonstop service. United Airlines, American Airlines and Frontier lead the route. The flight covers 926 miles in approximately 2h 56m. Beyond nonstop, 1-stop connecting options are also available.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| UA United Airlines Also: AV, EK, NH, NZ, OS, SN | 106 | 32Q, 739, 7M9, A21N, B39M | 2h37-2h59 | Star Alliance | AV, EK, NH, NZ, OS, SN | |
| AA American Airlines Also: AS, AY, BA, CX, EI, GF, IB, JL, RJ | 69 | 319, 738, E75S | 2h21-3h22 | Oneworld | AS, AY, BA, CX, EI, GF, IB, JL, RJ | |
| F9 Frontier Also: Y4 | 7 | A21N | 2h51 | – | Y4 | |
| AM Aeromexico | 0 | – | – | SkyTeam | – | |
| DL Delta Air Lines | 0 | – | – | SkyTeam | – | |
| NK Spirit Airlines | 0 | – | – | – | – |
Weekly Schedule Pattern
Connection Landscape
On-Time Performance
Other ways to reach Chicago from Houston
| Metric | IAH→ORD | HOU→ORD | CLL→ORD |
|---|---|---|---|
| Distance from IAH | – | 24 mi | 74 mi |
| Nonstop airlines | 6 | 3 | 1 |
| Weekly flights | 471 | 1 | 1 |
| Flight time | 2h 56m | 2h 40m | 1h 59m |
| Departure OTP | 0% | – | – |
Travel Essentials
IAH: CDT · ORD: CDT
When it's 6:00 PM in Houston, it's 6:00 PM in Chicago.
IAH has no direct rail link to downtown Houston. The IAH Express bus runs from Houston Amtrak/Greyhound station via Park & Ride to Terminal C (60–90 min, $1.25 with METRO Q card). This is the only transit option; Houston's rail network does not reach the airport.Taxis from downtown Houston cost $50–70 and take 40–60 minutes. Ride-hails (Uber, Lyft) are typically $35–55. IAH sits 23 miles north of downtown on the North Freeway (I-45); traffic is heavy during morning and evening rush. Remote economy parking lots serve all terminals via shuttle.
CTA Blue Line runs 24/7 from O'Hare to downtown Chicago (45 min, $5). Taxis use a flat-rate zone system; downtown is around $40–45 plus tip. Ride-shares are typically $30–50.The Airport Transit System (ATS) connects all terminals and parking. Metra commuter rail does not serve O'Hare directly; transfer downtown via Blue Line.
Continental climate with four distinct seasons. Summers are warm and humid (25–32°C) with afternoon thunderstorms. Winters are cold (−10 to −2°C) with heavy snowfall that regularly delays flights December through March.
Spring and fall are mild but unpredictable. Pack layers. Lake Michigan moderates temperatures near the lakefront, but O'Hare sits inland and runs colder.
IAH–ORD Quick Facts
Frequently Asked Questions
Houston Intercontinental to Chicago O'Hare: United Hub-to-Hub Spine
IAH–ORD connects United Airlines' two largest hubs, making it one of the carrier's most operationally significant domestic segments. United holds a commanding share of capacity given its hub dominance at both ends, with American and Southwest providing limited competition. The 2.5-hour block time supports robust morning-departure, afternoon-return business banking, and the route carries substantial connecting traffic using IAH as a Gulf Coast gateway and ORD as a Midwest distribution point. Energy sector business travel between Houston and Chicago's financial district drives consistent demand.
Ground Access and Hub Connectivity
Houston IAH is 35 km north of downtown Houston and reached primarily by taxi, rideshare, or the Airport Direct bus to Midtown. No rail link exists to central Houston. O'Hare connects to downtown Chicago via the CTA Blue Line in 45 minutes for the Loop or via the Metra Union Pacific Northwest line. Both airports' United hubs offer extensive onward connections. IAH feeds Latin America and the Caribbean, while ORD feeds the broader Midwest, East Coast, and transatlantic network.