Chicago to Houston (ORD-IAH): nonstop upgrade & award space

United Airlines, American Airlines, and Frontier Airlines fly nonstop between Chicago (ORD) and Houston (IAH), roughly 176 times a week. With United Airlines running most of the schedule, the shape of a week is predictable, which makes an open premium seat on a given date easy to spot and quick to lose. 2LNR tracks confirmed upgrade and award space on American Airlines, on every ORD to IAH departure, so you know which flights have space before you book.

Schedule last confirmed . Departure times come from 2LNR's schedule data; confirm with the airline before you book.

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176
Nonstop flights a week
926 mi
Nonstop distance
Free
To get started

Chicago to Houston flight schedule

Scheduled nonstop departures for ORD to IAH, last checked against our schedule feed on September 6, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Schedule data dated .

Scheduled nonstop departures from Chicago (ORD) to Houston (IAH)
Date Flight Airline Departs ORD Arrives IAH Duration Aircraft
UA 1738United Airlines05:3008:192h 49m739
UA 2357United Airlines05:3008:192h 49m7M9
UA 1019United Airlines06:3009:192h 49m32Q
AA 2504American Airlines06:5309:402h 47m738
F9 3135Frontier Airlines07:2510:303h 5m32Q
UA 1231United Airlines07:3010:232h 53m32Q
UA 535United Airlines08:5011:462h 56m32Q
AA 3322American Airlines10:3013:182h 48m738
UA 2638United Airlines10:4013:362h 56m32Q
UA 1448United Airlines12:4715:402h 53m32Q
AA 2302American Airlines13:2216:102h 48m738
UA 2451United Airlines14:1517:203h 5m32Q
UA 2062United Airlines14:1617:173h 1m32Q
AA 2416American Airlines15:1017:572h 47m319
AA 2243American Airlines15:2018:052h 45m319
UA 714United Airlines16:1119:102h 59m32Q
AA 1496American Airlines16:5919:482h 49m319
UA 1954United Airlines17:4520:503h 5m32Q
UA 1921United Airlines17:5320:472h 54m32Q
UA 2139United Airlines18:2521:162h 51m7M9
UA 2439United Airlines18:2921:202h 51m7M9
UA 2813United Airlines19:5222:452h 53m32Q
AA 3144American Airlines21:1623:592h 43m738
UA 2665United Airlines21:3500:272h 52m32Q
UA 1738United Airlines05:3008:192h 49m739
UA 2357United Airlines05:3008:192h 49m7M9
UA 1019United Airlines06:3009:192h 49m32Q
AA 2504American Airlines06:5309:402h 47m738
UA 1231United Airlines07:3010:232h 53m32Q
UA 535United Airlines08:5011:462h 56m32Q
AA 3322American Airlines10:3013:182h 48m738
UA 2638United Airlines10:4013:362h 56m32Q
UA 1448United Airlines12:4715:402h 53m32Q
AA 2302American Airlines13:1916:072h 48m738
UA 2451United Airlines14:1517:203h 5m32Q
UA 2062United Airlines14:1617:173h 1m32Q
F9 3135Frontier Airlines14:4617:473h 1m32N
AA 2416American Airlines15:1017:572h 47m319
AA 2243American Airlines15:2018:052h 45m319
UA 714United Airlines16:1119:102h 59m32Q

Showing the first 40 of 168 scheduled ORD to IAH departures across the next 7 days with service. Every remaining date is on the interactive map.

Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline has not filed that value in the schedule data we hold. Aircraft are IATA equipment codes as filed, and can change up to departure.

See every ORD to IAH date on the interactive map

Confirmed upgrade & award space on ORD to IAH departures

2LNR tracks confirmed upgrade and award space on American Airlines, segment by segment and date by date. Open the calendar for Chicago to Houston to see which departures have space, the next 14 days free on every product and the full horizon on Pro.

See real availability

Confirmed upgrade and award seats on each ORD to IAH departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See ORD to IAH on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Chicago to Houston nonstop

Carriers operating ORD to IAH nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

See ORD to IAH on the interactive map →

Frequently asked questions about ORD to IAH

How far is Houston from Chicago?
ORD to IAH covers about 926 miles nonstop. Flight times vary by aircraft and season; the schedule table on this page lists each scheduled departure with its own times.
Which airlines fly nonstop from ORD to IAH?
United Airlines, American Airlines, and Frontier Airlines fly the route nonstop. 2LNR tracks confirmed upgrade and award space on American Airlines.
How many flights a week are there from ORD to IAH?
About 176 nonstop flights a week run between Chicago and Houston in the current schedule, operated by United Airlines, American Airlines, and Frontier Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.
What time do flights from ORD to IAH depart?
Scheduled ORD to IAH nonstops in the next 7 days with service leave between 05:30 and 21:35, local time at Chicago. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
How do I check upgrade or award availability on ORD to IAH?
Open the ORD to IAH route on the interactive map or the matrix to see confirmed upgrade and award space by date on American Airlines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens.

Never miss ORD to IAH upgrade or award space

See what is open by date on this route, the next 14 days free on every product and the full horizon on Pro.

Get started free