Atlanta (ATL) to Houston (IAH)
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.
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What actually flies ATL–IAH
US DOT T-100 · filed dataIn April 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 44% of departures; flights ran 78% full.
Departures
944
April 2026
Seats
167,931
both directions
Passengers
130,279
both directions
Load factor
77.6%
passengers ÷ seats
Who flies ATL–IAH?
Delta Air Lines operated the most nonstop ATL–IAH departures in April 2026 (440), one of 7 carriers on the route.
- DL
Delta Air Lines
440 departures · 80,694 seats
Share of departures46.6%78.1%
Load
- UA
United Airlines
281 departures · 39,341 seats
Share of departures29.8%69.3%
Load
- F9
Frontier Airlines
152 departures · 34,336 seats
Share of departures16.1%84.2%
Load
- NK
Spirit Airlines
59 departures · 12,584 seats
Share of departures6.3%82.1%
Load
- YV
Mesa Airlines
10 departures · 736 seats
Share of departures1.1%79.6%
Load
- GCA
Global Crossing Airlines
1 departures · 68 seats
Share of departures0.1%0.0%
Load
- AA
American Airlines
1 departures · 172 seats
Share of departures0.1%100.0%
Load
What plane flies ATL–IAH?
In April 2026, the Airbus A321 flew 44% of ATL–IAH departures — more than any other aircraft type.
- Airbus A321
411 departures · 79.7% load
43.5% - Airbus A320
195 departures · 72.5% load
20.7% - Airbus A321neo
112 departures · 83.2% load
11.9% - Boeing 737-700
86 departures · 72.1% load
9.1% - Airbus A319
62 departures · 73.0% load
6.6% - Airbus A320neo
33 departures · 84.4% load
3.5% - Boeing 737-900ER
16 departures · 54.1% load
1.7% - Boeing 737-800
13 departures · 65.3% load
1.4% - Embraer E175
10 departures · 79.6% load
1.1% - Boeing 737-900
2 departures · 62.8% load
0.2% - Boeing 737 MAX 8
2 departures · 61.1% load
0.2% - Boeing 737 MAX 9
1 departures · 40.2% load
0.1% - Boeing 717-200
1 departures · 99.1% load
0.1%
How has ATL–IAH traffic changed?
Nonstop ATL–IAH departures rose from 920 in May 2025 to 944 in April 2026.
Monthly nonstop ATL–IAH traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
920 departures · 125,635 passengers
86.0%
Load
June 2025
907 departures · 123,799 passengers
86.0%
Load
July 2025
953 departures · 130,014 passengers
86.3%
Load
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
By direction
The DOT files each direction separately — they rarely match.
ATL → IAH
78.1% full
474 departures · 65,885 passengers
IAH → ATL
77.1% full
470 departures · 64,394 passengers
Nonstop ATL–IAH 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
Atlanta
US
Hartsfield Jackson Atlanta International Airport
Coordinates
33.64°N, 84.43°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 April 2026, the Airbus A321 flew the largest share of departures (43.5%), followed by the Airbus A320 (20.7%).
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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