--- title: "Atlanta (ATL) to Houston (IAH) flights: who flies it" description: "Delta Air Lines, United Airlines and Frontier Airlines fly nonstop from ATL to IAH, about 135 flights a week. Upgrade and award space by date on 2LNR, next 14 days free." canonical: "https://2lnr.com/routes/atl-iah" url: "https://2lnr.com/routes/atl-iah.md" date_modified: "2026-10-18T05:10:47Z" --- # Atlanta to Houston (ATL-IAH): nonstop upgrade & award space Delta Air Lines, United Airlines, and Frontier Airlines fly nonstop between Atlanta (ATL) and Houston (IAH), roughly 135 times a week. The timetable below shows the nonstop scheduled at 2h 7m to 2h 27m for the 688 miles. 2LNR checks confirmed upgrade and award space on Delta Air Lines flights on this route, so you can see which departures have space before you book. Schedule last confirmed October 18, 2026. Departure times come from 2LNR's schedule data; confirm with the airline before you book. Updated October 22, 2026. See ATL to IAH on the interactive map [Get started free](https://2lnr.com/login) 135 Flights a week, 4-week average 2h 7m to 2h 27m Scheduled flight time 688 mi Nonstop distance Free To get started ## Atlanta to Houston flight schedule Scheduled nonstop departures for ATL to IAH starting October 21, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book. Scheduled nonstop departures from Atlanta (ATL) to Houston (IAH) | Date | Flight | Airline | Departs ATL | Arrives IAH | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Wed, Oct 21 | F9 1403 | Frontier Airlines | 06:00 | 07:19 | 2h 19m | [Airbus A321neo family](https://2lnr.com/seatmaps/f9/a321neo.md) | | Wed, Oct 21 | UA 532 | United Airlines | 07:05 | 08:26 | 2h 21m | [Boeing 737-800](https://2lnr.com/seatmaps/ua/737-800.md) | | Wed, Oct 21 | DL 1585 | Delta Air Lines | 07:25 | 08:35 | 2h 10m | [Airbus A321](https://2lnr.com/seatmaps/dl/a321.md) | | Wed, Oct 21 | DL 1682 | Delta Air Lines | 09:49 | 10:59 | 2h 10m | [Airbus A320](https://2lnr.com/seatmaps/dl/a320.md) | | Wed, Oct 21 | F9 2399 | Frontier Airlines | 09:55 | 11:22 | 2h 27m | [Airbus A320neo](https://2lnr.com/seatmaps/f9/a320neo.md) | | Wed, Oct 21 | UA 425 | United Airlines | 11:45 | 13:01 | 2h 16m | Boeing 737-800 | | Wed, Oct 21 | DL 2709 | Delta Air Lines | 12:15 | 13:23 | 2h 8m | Airbus A320 | | Wed, Oct 21 | DL 2890 | Delta Air Lines | 13:40 | 15:00 | 2h 20m | Airbus A321 | | Wed, Oct 21 | F9 3217 | Frontier Airlines | 13:47 | 15:05 | 2h 18m | [Airbus A321](https://2lnr.com/seatmaps/f9/a321.md) | | Wed, Oct 21 | DL 1874 | Delta Air Lines | 14:45 | 15:54 | 2h 9m | Airbus A321 | | Wed, Oct 21 | DL 1223 | Delta Air Lines | 15:15 | 16:35 | 2h 20m | Airbus A321 | | Wed, Oct 21 | UA 3992 | United Airlines | 16:03 | 17:25 | 2h 22m | [Embraer E175](https://2lnr.com/seatmaps/ua/e175.md) | | Wed, Oct 21 | DL 1131 | Delta Air Lines | 16:12 | 17:23 | 2h 11m | Airbus A320 | | Wed, Oct 21 | DL 1284 | Delta Air Lines | 18:55 | 20:02 | 2h 7m | Airbus A321 | | Wed, Oct 21 | UA 6130 | United Airlines | 18:56 | 20:22 | 2h 26m | Embraer E175 | | Wed, Oct 21 | DL 1892 | Delta Air Lines | 20:54 | 22:02 | 2h 8m | Airbus A321 | | Wed, Oct 21 | F9 4075 | Frontier Airlines | 21:04 | 22:23 | 2h 19m | Airbus A321neo family | | Wed, Oct 21 | DL 1601 | Delta Air Lines | 22:40 | 23:58 | 2h 18m | Airbus A321 | | Thu, Oct 22 | F9 1403 | Frontier Airlines | 06:00 | 07:19 | 2h 19m | Airbus A321neo family | | Thu, Oct 22 | UA 532 | United Airlines | 07:05 | 08:26 | 2h 21m | Boeing 737-800 | | Thu, Oct 22 | DL 1585 | Delta Air Lines | 07:25 | 08:35 | 2h 10m | Airbus A321 | | Thu, Oct 22 | UA 3999 | United Airlines | 09:30 | 10:57 | 2h 27m | Embraer E175 | | Thu, Oct 22 | F9 2399 | Frontier Airlines | 09:55 | 11:22 | 2h 27m | Airbus A320neo | | Thu, Oct 22 | DL 1682 | Delta Air Lines | 09:59 | 11:08 | 2h 9m | Airbus A320 | | Thu, Oct 22 | UA 425 | United Airlines | 11:45 | 13:01 | 2h 16m | [Boeing 737 MAX 8](https://2lnr.com/seatmaps/ua/737-max-8.md) | | Thu, Oct 22 | DL 2709 | Delta Air Lines | 12:15 | 13:23 | 2h 8m | Airbus A320 | | Thu, Oct 22 | DL 2890 | Delta Air Lines | 13:40 | 15:00 | 2h 20m | Airbus A321 | | Thu, Oct 22 | DL 1874 | Delta Air Lines | 14:45 | 15:55 | 2h 10m | Airbus A321 | | Thu, Oct 22 | DL 1223 | Delta Air Lines | 15:15 | 16:35 | 2h 20m | Airbus A321 | | Thu, Oct 22 | UA 3992 | United Airlines | 16:03 | 17:25 | 2h 22m | Embraer E175 | | Thu, Oct 22 | DL 1131 | Delta Air Lines | 16:12 | 17:23 | 2h 11m | Airbus A320 | | Thu, Oct 22 | DL 1284 | Delta Air Lines | 18:55 | 20:02 | 2h 7m | Airbus A321 | | Thu, Oct 22 | UA 6130 | United Airlines | 18:56 | 20:22 | 2h 26m | Embraer E175 | | Thu, Oct 22 | DL 1892 | Delta Air Lines | 20:54 | 22:02 | 2h 8m | Airbus A321 | | Thu, Oct 22 | F9 4075 | Frontier Airlines | 21:04 | 22:23 | 2h 19m | Airbus A321neo family | | Thu, Oct 22 | DL 1601 | Delta Air Lines | 22:43 | 23:55 | 2h 12m | Airbus A321 | | Fri, Oct 23 | F9 1403 | Frontier Airlines | 06:00 | 07:19 | 2h 19m | Airbus A321neo family | | Fri, Oct 23 | UA 532 | United Airlines | 07:05 | 08:26 | 2h 21m | Boeing 737-800 | | Fri, Oct 23 | DL 1585 | Delta Air Lines | 07:25 | 08:35 | 2h 10m | Airbus A321 | | Fri, Oct 23 | UA 3999 | United Airlines | 09:30 | 10:57 | 2h 27m | Embraer E175 | Showing the first 40 of 131 scheduled ATL to IAH departures across 7 days with service, starting October 21, 2026. 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 hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure. See every ATL to IAH date on the interactive map ## Aircraft on the Atlanta to Houston nonstop In the schedule table on this page, Delta Air Lines flies the [Airbus A321](https://2lnr.com/seatmaps/dl/a321.md) and the [Airbus A320](https://2lnr.com/seatmaps/dl/a320.md). United Airlines flies the [Embraer E175](https://2lnr.com/seatmaps/ua/e175.md), the [Boeing 737-800](https://2lnr.com/seatmaps/ua/737-800.md), and the [Boeing 737 MAX 8](https://2lnr.com/seatmaps/ua/737-max-8.md). Frontier Airlines flies the [Airbus A321neo family](https://2lnr.com/seatmaps/f9/a321neo.md), the [Airbus A320neo](https://2lnr.com/seatmaps/f9/a320neo.md), and the [Airbus A321](https://2lnr.com/seatmaps/f9/a321.md). Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure. ## Confirmed upgrade & award space on ATL to IAH departures 2LNR tracks confirmed upgrade and award space on Delta Air Lines, segment by segment and date by date. Open the calendar for Atlanta to Houston to see which departures have space, the next 14 days free on every product and the full horizon on Pro. Delta Air Lines award space was open on all 14 Atlanta to Houston departure dates from October 19 to November 1 that 2LNR checked in the 7 days to October 19, 2026. ### See real availability Confirmed upgrade or award seats by date on the ATL to IAH departures 2LNR tracks, checked against live inventory so you know what's open before you book. ### Set an alert Premium inventory turns over fast. Watch this route on Pro and 2LNR notifies you when space appears on a date you're tracking. ### Plan on the map See ATL to IAH on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Atlanta to Houston nonstop Carriers operating ATL to IAH nonstop in the current schedule. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date. - [Delta Air Lines (DL) route map](https://2lnr.com/routes/airlines/dl.md)\ [The aircraft DL flies](https://2lnr.com/seatmaps/dl.md) - [United Airlines (UA) route map](https://2lnr.com/routes/airlines/ua.md)\ [The aircraft UA flies](https://2lnr.com/seatmaps/ua.md) - [Frontier Airlines (F9) route map](https://2lnr.com/routes/airlines/f9.md)\ [The aircraft F9 flies](https://2lnr.com/seatmaps/f9.md) See ATL to IAH on the interactive map → ## Frequently asked questions about ATL to IAH **How long is the flight from Atlanta (ATL) to Houston (IAH)?** Scheduled flight times from Atlanta (ATL) to Houston (IAH) run from 2h 7m to 2h 27m across the departures in the schedule table on this page. The nonstop covers about 688 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from ATL to IAH?** Delta Air Lines, United Airlines, and Frontier Airlines fly ATL to IAH nonstop. 2LNR tracks confirmed upgrade and award space on Delta Air Lines. **How many flights a week are there from ATL to IAH?** About 135 nonstop flights a week run between Atlanta (ATL) and Houston (IAH) in the current schedule, operated by Delta Air Lines, United 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 ATL to IAH depart?** Scheduled ATL to IAH nonstops in the next 7 days with service leave between 06:00 and 22:43, local time at Atlanta. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate ATL to IAH nonstop?** The schedule table on this page lists 19 flight numbers for ATL to IAH nonstops, including DL 1585, DL 1682, DL 2709, and DL 2890 on Delta Air Lines; UA 425 and UA 532 on United Airlines; and F9 1403 and F9 2399 on Frontier Airlines. The table lists each departure by date with its times and aircraft. **How do I check upgrade or award availability on ATL to IAH?** Open the ATL to IAH route on the interactive map or the matrix to see confirmed upgrade and award space by date on Delta Air Lines, 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. Flying the other way? See [IAH to ATL upgrade and award space](https://2lnr.com/routes/iah-atl.md). Award seats rather than schedules? See [Delta Air Lines award availability](https://2lnr.com/awards/dl.md). Looking beyond this route? See [every route from Atlanta (ATL)](https://2lnr.com/routes/atl.md), or [every route from Houston (IAH)](https://2lnr.com/routes/iah.md). Nonstops to Houston (IAH) from other airports within 150 miles of Atlanta (ATL): - [Chattanooga (CHA) to Houston (IAH)](https://2lnr.com/routes/cha-iah.md), 106 miles from ATL - [Birmingham (BHM) to Houston (IAH)](https://2lnr.com/routes/bhm-iah.md), 134 miles from ATL - [Montgomery (MGM) to Houston (IAH)](https://2lnr.com/routes/mgm-iah.md), 147 miles from ATL Nonstops from Atlanta (ATL) to other airports within 150 miles of Houston (IAH): - [Atlanta (ATL) to Houston (HOU)](https://2lnr.com/routes/atl-hou.md), 24 miles from IAH - [Atlanta (ATL) to Austin (AUS)](https://2lnr.com/routes/atl-aus.md), 140 miles from IAH Distances are great-circle between the airports, not driving distance. - [How Delta upgrades clear](https://2lnr.com/about/dl/upgrades.md) - [How to read award availability by date](https://2lnr.com/guides/award-availability.md) ## Never miss ATL to IAH upgrade or award space See what's open by date on this route, the next 14 days free on every product and the full horizon on Pro. [Get started free](https://2lnr.com/login)