Houston (IAH) to Ontario (ONT) flights
2 airlines fly nonstop from Houston (IAH) to Ontario (ONT): Frontier Airlines and United Airlines. The two airports are 1,331 miles (2,142 km) apart. United Airlines is in Star Alliance. There are also 14 ways to fly it with one stop, through Phoenix, Austin and Dallas and more.
Airlines flying nonstop from IAH to ONT
- Frontier AirlinesNot in an allianceWho books it
- United AirlinesStar Alliance · bookable with 13 programsWho books it
Book IAH to ONT with points
Loyalty programs that can book at least one of the nonstop airlines, from the Award Booking Guide.
- Air Canada AeroplanBooks United Airlines
- Air New Zealand AirpointsBooks United Airlines
- ANA Mileage ClubBooks United Airlines
- Avianca LifeMilesBooks United Airlines
- Emirates SkywardsBooks United Airlines
- EVA Air Infinity MileageLandsBooks United Airlines
- JetBlue TrueBlueBooks United Airlines
- Lufthansa Miles & MoreBooks United Airlines
- Singapore Airlines KrisFlyerBooks United Airlines
- TAP Miles&GoBooks United Airlines
- Thai Royal Orchid PlusBooks United Airlines
- Turkish Airlines Miles&SmilesBooks United Airlines
- United MileagePlusBooks United Airlines
IAH to ONT with one stop
14 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Phoenix (PHX)American Airlines the whole way
- Via Austin (AUS)United Airlines, then Southwest Airlines
- Via Dallas (DFW)American Airlines the whole way
- Via Las Vegas (LAS)Frontier Airlines the whole way
- Via Denver (DEN)Frontier Airlines and United Airlines the whole way
- Via Salt Lake City (SLC)Delta Air Lines the whole way
- Via Sacramento (SMF)United Airlines, then Southwest Airlines and Frontier Airlines
- Via San Francisco (SFO)United Airlines the whole way
- Via Leon/Guanajuato (BJX)United Airlines and VivaAerobus, then Volaris
- Via Guadalajara (GDL)Volaris the whole way
- Via Morelia (MLM)Volaris the whole way
- Via Nashville (BNA)United Airlines, then Southwest Airlines
- Via Atlanta (ATL)Delta Air Lines the whole way
- Via Chicago (ORD)American Airlines and United Airlines the whole way
IAH to ONT: common questions
Which airlines fly nonstop from IAH to ONT?
Frontier Airlines and United Airlines (Star Alliance) fly nonstop from Houston (IAH) to Ontario (ONT).
How far is Houston from Ontario by plane?
Houston (IAH) and Ontario (ONT) are 1,331 miles (2,142 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book IAH to ONT award flights?
13 programs can book at least one of the nonstop airlines: Air Canada Aeroplan, Air New Zealand Airpoints, ANA Mileage Club, Avianca LifeMiles, Emirates Skywards, EVA Air Infinity MileageLands, JetBlue TrueBlue, Lufthansa Miles & More and 5 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
How many miles does IAH to ONT cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for IAH to ONT with taxes and fees.
Where can I connect between Houston and Ontario?
The most direct connections are through Phoenix (PHX), Austin (AUS), Dallas (DFW), Las Vegas (LAS) and Denver (DEN). On 10 of them the same airline flies both flights, for example American Airlines through Phoenix.
More routes
Routes are scheduled nonstop flights. The route data is refreshed monthly; this list was last checked November 11, 2026. Seasonal routes and new launches can be missing or end early, so confirm with the airline before you book. Distances are great-circle, the shortest path between the two airports.