Houston (IAH) to Atlanta (ATL) flights

Delta Air Lines, United Airlines, Frontier Airlines, Mesa Airlines fly nonstop from George Bush Intercontinental Airport to Hartsfield Jackson Atlanta International Airport, with about 98 flights a week in July 2026. The 689-mile flight takes about 2h 4m gate to gate.

From

IAH

Houston

George Bush Intercontinental Airport

ATL

Atlanta

Hartsfield Jackson Atlanta International Airport

Distance: 689 mi · 1,109 km
Flight time: 2h 4m
Airlines: 4
Seats filled: 80%

Flights a week, July 2026

5,179 flights and 707,628 passengers in 12 months

Map data: Natural Earth. Lines follow the shortest (great-circle) path.

Airlines flying IAH to ATL

Airline	Flights a week	Aircraft	Passengers (12 months)	Flight time
Delta Air Lines	53	Airbus A321, Airbus A320-100/200, Airbus A319	362,708	1h 59m
United Airlines	20	Airbus A319, Airbus A320-100/200, Boeing 737-700 / MAX 7	132,754	2h 4m
Frontier Airlines	20	Airbus A321, Airbus A320neo, Airbus A320-100/200	141,595	2h 21m
Mesa Airlines	6	Embraer E175	22,010	2h 7m
Spirit AirlinesCeased operations 2026-05-02	n/a	Airbus A320-100/200, Airbus A321, Airbus A320neo	48,561	1h 57m

Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.

IAH to ATL flight schedule

19 flight numbers flew this route in August 2026, 15 of them almost daily. The first usually leaves at 5:41am and the last at 8:02pm. Times are local and can change; check with the airline before you book.

Flight	Departs	Arrives	Days flown in August 2026	On time (12 months)
DL 1069Delta Air Lines	5:41am	8:49am	31	92%
F9 1404Frontier Airlines	6:00am	9:32am	31	68%
DL 1315Delta Air Lines	7:00am	10:04am	31	88%
UA 1030United Airlines	7:20am	10:32am	31	91%
DL 2709Delta Air Lines	8:05am	11:10am	5	82%
DL 644Delta Air Lines	8:05am	11:10am	26	87%
DL 1585Delta Air Lines	9:45am	12:52pm	31	78%
UA 4079United Airlines · operated by Mesa Airlines	11:55am	3:16pm	8	78%
UA 4032United Airlines · operated by Mesa Airlines	12:07pm	3:22pm	21	76%
DL 1682Delta Air Lines	12:12pm	3:24pm	31	78%
F9 4076Frontier Airlines	12:16pm	3:35pm	25	64%
DL 1572Delta Air Lines	2:37pm	5:53pm	31	78%
UA 1211United Airlines	2:40pm	5:52pm	26	55%
F9 4106Frontier Airlines	4:32pm	8:04pm	23	50%
DL 2890Delta Air Lines	4:37pm	7:59pm	31	65%
UA 2050United Airlines	6:05pm	9:18pm	10	45%
UA 1260United Airlines	6:08pm	9:20pm	21	67%
DL 1223Delta Air Lines	6:36pm	9:59pm	26	72%
F9 2400Frontier Airlines	8:02pm	11:24pm	8	54%

Is IAH to ATL on time?

From September 2025 to August 2026, 77% of 5,272 flights arrived within 15 minutes of schedule and 1.8% were cancelled. Flights leaving around 7am were the most punctual (90%), those around 6am the least (67%). Most delay time was caused by late-arriving aircraft (37%).

Airline	Flights	On time	Average delay	Cancelled
Delta Air Lines	2,543	80%	15 min	2%
United Airlines	1,601	81%	13 min	0.5%
Frontier Airlines	827	62%	28 min	2.5%
Spirit Airlines	301	75%	16 min	5.3%

Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.

On-time arrivals by departure time

Scheduled departure	Flights	On time
5am to 6am	492	87%
6am to 7am	312	67%
7am to 8am	733	90%
8am to 9am	182	88%
9am to 10am	301	76%
11am to 12pm	495	83%
12pm to 1pm	318	75%
1pm to 2pm	154	81%
2pm to 3pm	502	75%
4pm to 5pm	329	70%
5pm to 6pm	170	66%
6pm to 7pm	760	67%
8pm to 9pm	335	72%

Flights by month

Month	Flights	Passengers
August 2025	455	56,518
September 2025	425	54,395
October 2025	467	62,545
November 2025	427	56,289
December 2025	417	54,268
January 2026	401	50,285
February 2026	382	52,652
March 2026	419	61,065
April 2026	469	64,394
May 2026	460	67,052
June 2026	422	63,616
July 2026	440	64,817

Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.