Atlanta (ATL) to Houston (IAH)

688mi
1,108 km598 nm

Flight time

≈ 2h 11m

Bearing

251° W

Atlanta (ATL) to Houston (IAH) is 688 miles (1,108 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.

Route map: ATL → IAHATLIAH

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What actually flies ATL–IAH

Filed traffic data

In July 2026, Delta Air Lines operated the most departures, one of 7 carriers flying nonstop ATL–IAH; the Airbus A321 was the most common aircraft at 36% of departures; flights ran 86% full.

Departures

884

July 2026

Seats

150,948

both directions

Passengers

130,276

both directions

Load factor

86.3%

RPM ÷ ASM

Who flies ATL–IAH?

Delta Air Lines operated the most nonstop ATL–IAH departures in July 2026 (467), one of 7 carriers on the route.

  • DL

    Delta Air Lines

    467 departures · 82,897 seats

    89.6%

    Load

  • UA

    United Airlines

    178 departures · 25,364 seats

    85.2%

    Load

  • F9

    Frontier Airlines

    176 departures · 37,952 seats

    79.1%

    Load

  • YV

    Mesa Airlines

    53 departures · 3,986 seats

    94.0%

    Load

  • OO

    SkyWest Airlines

    9 departures · 684 seats

    79.5%

    Load

  • OH

    PSA Airlines

    1 departures · 65 seats

    89.2%

    Load

  • NK

    Spirit Airlines

    0 departures · 0 seats

    —

    Load

What plane flies ATL–IAH?

In July 2026, the Airbus A321 flew 36% of ATL–IAH departures — more than any other aircraft type.

How has ATL–IAH traffic changed?

Nonstop ATL–IAH departures fell from 911 in August 2025 to 884 in July 2026.

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

  • August 2025

    911 departures · 115,038 passengers

    81.3%

    Load

  • September 2025

    854 departures · 110,182 passengers

    79.8%

    Load

  • October 2025

    933 departures · 127,382 passengers

    81.9%

    Load

  • November 2025

    859 departures · 114,533 passengers

    78.9%

    Load

  • December 2025

    835 departures · 112,297 passengers

    82.7%

    Load

  • January 2026

    802 departures · 101,505 passengers

    74.2%

    Load

  • February 2026

    768 departures · 106,454 passengers

    77.5%

    Load

  • March 2026

    841 departures · 122,733 passengers

    82.7%

    Load

  • April 2026

    944 departures · 130,279 passengers

    77.6%

    Load

  • May 2026

    925 departures · 134,877 passengers

    81.7%

    Load

  • June 2026

    853 departures · 125,632 passengers

    85.2%

    Load

  • July 2026

    884 departures · 130,276 passengers

    86.3%

    Load

By direction

Each direction is filed separately — they rarely match.

ATL → IAH

86.2% full

444 departures · 65,459 passengers

IAH → ATL

86.4% full

440 departures · 64,817 passengers

Nonstop ATL–IAH traffic has been filed since 2025.

Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through July 2026; filings from 2025. Public domain (US Government work).

The airports

ATL

Atlanta

US

Hartsfield Jackson Atlanta International Airport

Coordinates

33.64°N, 84.43°W

Hemisphere

N · W

IAH

Houston

US

George Bush Intercontinental Airport

Coordinates

29.98°N, 95.34°W

Hemisphere

N · W

Frequently asked

How far is Atlanta (ATL) from Houston (IAH)?

ATL to IAH is 688 miles (1,108 km / 598 nautical miles) measured great-circle — the shortest path over the surface of the Earth.

How long is the flight from ATL to IAH?

A nonstop covers the 688-mile great-circle distance in roughly 2h 11m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.

What plane flies ATL–IAH?

In July 2026, the Airbus A321 flew the largest share of departures (35.9%), followed by the Airbus A320 (21.9%).

What mileage do I earn flying ATL–IAH?

Distance-based programs credit off the 688-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.

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