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Houston (IAH) to Chicago (ORD)

926mi
1,491 km805 nm

Flight time

≈ 2h 39m

Bearing

25° NE

Houston (IAH) to Chicago (ORD) is 926 miles (1,491 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.

Route map: IAH → ORDIAHORD

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What actually flies IAH–ORD

US DOT T-100 · filed data

In April 2026, United Airlines operated the most departures, one of 9 carriers flying nonstop IAH–ORD; the Airbus A321neo was the most common aircraft at 49% of departures; flights ran 80% full.

Departures

1,023

April 2026

Seats

174,953

both directions

Passengers

139,401

both directions

Load factor

79.7%

passengers ÷ seats

Who flies IAH–ORD?

United Airlines operated the most nonstop IAH–ORD departures in April 2026 (654), one of 9 carriers on the route.

  • UA

    United Airlines

    654 departures · 126,411 seats

    79.2%

    Load

  • MQ

    Envoy Air

    100 departures · 7,578 seats

    88.2%

    Load

  • YX

    Republic Airways

    96 departures · 7,274 seats

    88.8%

    Load

  • AA

    American Airlines

    75 departures · 12,548 seats

    63.7%

    Load

  • F9

    Frontier Airlines

    53 departures · 11,746 seats

    85.9%

    Load

  • NK

    Spirit Airlines

    41 departures · 9,040 seats

    87.7%

    Load

  • OO

    SkyWest Airlines

    2 departures · 146 seats

    0.0%

    Load

  • C5

    CommuteAir

    1 departures · 50 seats

    16.0%

    Load

  • AM

    Aeroméxico

    1 departures · 160 seats

    73.1%

    Load

What plane flies IAH–ORD?

In April 2026, the Airbus A321neo flew 49% of IAH–ORD departures — more than any other aircraft type.

How has IAH–ORD traffic changed?

Nonstop IAH–ORD departures rose from 1,007 in May 2025 to 1,023 in April 2026.

Monthly nonstop IAH–ORD traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.

  • May 2025

    1,007 departures · 151,401 passengers

    85.2%

    Load

  • June 2025

    1,003 departures · 147,071 passengers

    87.9%

    Load

  • July 2025

    1,007 departures · 149,625 passengers

    88.8%

    Load

  • August 2025

    1,048 departures · 146,606 passengers

    85.5%

    Load

  • September 2025

    1,068 departures · 143,007 passengers

    81.2%

    Load

  • October 2025

    1,036 departures · 146,828 passengers

    83.1%

    Load

  • November 2025

    910 departures · 123,684 passengers

    79.6%

    Load

  • December 2025

    1,019 departures · 145,664 passengers

    82.3%

    Load

  • January 2026

    927 departures · 121,089 passengers

    76.6%

    Load

  • February 2026

    870 departures · 117,335 passengers

    77.7%

    Load

  • March 2026

    987 departures · 145,289 passengers

    82.6%

    Load

  • April 2026

    1,023 departures · 139,401 passengers

    79.7%

    Load

By direction

The DOT files each direction separately — they rarely match.

ORD → IAH

75.3% full

516 departures · 66,160 passengers

IAH → ORD

84.1% full

507 departures · 73,241 passengers

Nonstop IAH–ORD traffic has been filed with the US DOT since 2025.

Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through April 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.

The airports

IAH

Houston

US

George Bush Intercontinental Airport

Coordinates

29.98°N, 95.34°W

Hemisphere

N · W

ORD

Chicago

US

Chicago O'Hare International Airport

Coordinates

41.98°N, 87.90°W

Hemisphere

N · W

Frequently asked

How far is Houston (IAH) from Chicago (ORD)?

IAH to ORD is 926 miles (1,491 km / 805 nautical miles) measured great-circle — the shortest path over the surface of the Earth.

How long is the flight from IAH to ORD?

A nonstop covers the 926-mile great-circle distance in roughly 2h 39m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.

What plane flies IAH–ORD?

In April 2026, the Airbus A321neo flew the largest share of departures (48.6%), followed by the Embraer E175 (19.2%).

What mileage do I earn flying IAH–ORD?

Distance-based programs credit off the 926-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.

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