--- title: "Houston (IAH) to Ontario (ONT) flights: who flies it" description: "United Airlines and Frontier Airlines fly nonstop from IAH to ONT, about 10 flights a week, covering 1,332 miles. See the full timetable and who flies it on 2LNR." canonical: "https://2lnr.com/routes/iah-ont" url: "https://2lnr.com/routes/iah-ont.md" date_modified: "2026-10-18T05:10:47Z" --- # Houston to Ontario (IAH-ONT): nonstop flights and who flies them United Airlines and Frontier Airlines fly the IAH to ONT nonstop about 10 times a week. The timetable below shows the nonstop scheduled at 3h 29m to 3h 35m for the 1,332 miles. Schedule last confirmed October 18, 2026. Departure times come from 2LNR's schedule data; confirm with the airline before you book. Updated October 23, 2026. See IAH to ONT on the interactive map [Get started free](https://2lnr.com/login) 10 Flights a week, 4-week average 3h 29m to 3h 35m Scheduled flight time 1,332 mi Nonstop distance Free To get started ## Houston to Ontario flight schedule Scheduled nonstop departures for IAH to ONT starting October 22, 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 Houston (IAH) to Ontario (ONT) | Date | Flight | Airline | Departs IAH | Arrives ONT | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Thu, Oct 22 | F9 3131 | Frontier Airlines | 16:18 | 17:52 | 3h 34m | [Airbus A321](https://2lnr.com/seatmaps/f9/a321.md) | | Thu, Oct 22 | UA 1563 | United Airlines | 20:30 | 21:59 | 3h 29m | [Boeing 737-900](https://2lnr.com/seatmaps/ua/737-900.md) | | Fri, Oct 23 | F9 3131 | Frontier Airlines | 16:18 | 17:52 | 3h 34m | Airbus A321 | | Fri, Oct 23 | UA 1563 | United Airlines | 20:30 | 21:59 | 3h 29m | Boeing 737-900 | | Sat, Oct 24 | UA 1563 | United Airlines | 20:30 | 21:59 | 3h 29m | Boeing 737-900 | | Sun, Oct 25 | F9 3131 | Frontier Airlines | 16:18 | 17:52 | 3h 34m | Airbus A321 | | Sun, Oct 25 | UA 1563 | United Airlines | 20:06 | 21:41 | 3h 35m | [Boeing 737-800](https://2lnr.com/seatmaps/ua/737-800.md) | | Mon, Oct 26 | F9 3131 | Frontier Airlines | 16:18 | 17:52 | 3h 34m | Airbus A321 | | Mon, Oct 26 | UA 1563 | United Airlines | 20:30 | 21:59 | 3h 29m | Boeing 737-900 | | Tue, Oct 27 | UA 1563 | United Airlines | 20:05 | 21:40 | 3h 35m | Boeing 737-800 | | Wed, Oct 28 | UA 1563 | United Airlines | 20:30 | 21:59 | 3h 29m | Boeing 737-900 | Showing all 11 scheduled IAH to ONT departures across 7 days with service, starting October 22, 2026. Later dates are 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 IAH to ONT date on the interactive map ## Aircraft on the Houston to Ontario nonstop In the schedule table on this page, United Airlines flies the [Boeing 737-900](https://2lnr.com/seatmaps/ua/737-900.md) and the [Boeing 737-800](https://2lnr.com/seatmaps/ua/737-800.md), and Frontier Airlines flies 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. ## The full IAH to ONT nonstop schedule This page carries the full IAH to ONT nonstop schedule, who operates each departure and how often it runs; the reverse direction is linked below. ### See the schedule Who operates each IAH to ONT nonstop and how often it runs, from 2LNR's schedule data. ### Plan on the map See IAH to ONT on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Houston to Ontario nonstop Carriers operating IAH to ONT nonstop in the current schedule. - [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 IAH to ONT on the interactive map → ## Frequently asked questions about IAH to ONT **How long is the flight from Houston (IAH) to Ontario (ONT)?** Scheduled flight times from Houston (IAH) to Ontario (ONT) run from 3h 29m to 3h 35m across the departures in the schedule table on this page. The nonstop covers about 1,332 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from IAH to ONT?** United Airlines and Frontier Airlines fly IAH to ONT nonstop. 2LNR doesn't show award or upgrade space for any of them on IAH to ONT, so this page carries the schedule rather than a space claim. **How many flights a week are there from IAH to ONT?** About 10 nonstop flights a week run between Houston (IAH) and Ontario (ONT) in the current schedule, operated by 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 IAH to ONT depart?** Scheduled IAH to ONT nonstops in the next 7 days with service leave between 16:18 and 20:30, local time at Houston. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate IAH to ONT nonstop?** In the schedule table on this page, IAH to ONT nonstops fly as UA 1563 on United Airlines and F9 3131 on Frontier Airlines. The table lists each departure by date with its times and aircraft. **Does 2LNR show upgrade or award space on IAH to ONT?** Not on this route: 2LNR doesn't show award or upgrade space for any airline flying IAH to ONT. The page carries the full IAH to ONT nonstop schedule and who flies each departure, and the reverse direction is linked below. Flying the other way? See [ONT to IAH nonstop flights](https://2lnr.com/routes/ont-iah.md). Award seats rather than schedules? See [award availability by airline](https://2lnr.com/awards.md). Looking beyond this route? See [every route from Houston (IAH)](https://2lnr.com/routes/iah.md), or [every route from Ontario (ONT)](https://2lnr.com/routes/ont.md). Nonstops from Houston (IAH) to other airports within 150 miles of Ontario (ONT): - [Houston (IAH) to Santa Ana (SNA)](https://2lnr.com/routes/iah-sna.md), 30 miles from ONT - [Houston (IAH) to Los Angeles (LAX)](https://2lnr.com/routes/iah-lax.md), 48 miles from ONT - [Houston (IAH) to Palm Springs (PSP)](https://2lnr.com/routes/iah-psp.md), 64 miles from ONT - [Houston (IAH) to San Diego (SAN)](https://2lnr.com/routes/iah-san.md), 94 miles from ONT Distances are great-circle between the airports, not driving distance. - [How to plan an upgrade by route](https://2lnr.com/guides/upgrade-strategy.md) ## See the full IAH to ONT nonstop schedule Every scheduled departure on this route, with who flies it. 2LNR shows upgrade and award space by date on the carriers it tracks, the next 14 days free on every product and the full horizon on Pro. [Get started free](https://2lnr.com/login)