Direct (nonstop) flights from Houston to Ontario
2 airlines fly nonstop from George Bush Intcntl Houston (IAH) to Ontario International Airport (ONT). It's 1,333 miles (2,146 km), about 3h 36m in the air. Operated by Frontier Airlines, United Airlines.
Frontier Airlines
United Airlines
Route data last updated: May 30, 2026
Airlines with non-stop flights
F9
Frontier Airlines
UA
United Airlines
Alternative Routes
Other ways to fly from Houston to Ontario with one stop · direct emits 225 kg CO₂ per passenger
Looking for the return flight?
ONT → IAH: Flights from Ontario to HoustonOther direct flights from Houston
Direct flights from Ontario (ONT)
Frequently Asked Questions
How long is the direct flight from Houston to Ontario?
A nonstop flight from Houston (IAH) to Ontario (ONT) takes approximately 3 hours and 36 minutes. The distance is 1,333 miles (2,146 km).
Which airlines fly nonstop from Houston to Ontario?
2 airlines: Frontier Airlines, United Airlines.
Is there a nonstop flight from Houston to Ontario?
Yes. 2 airlines: Frontier Airlines, United Airlines.
How far is Houston from Ontario?
The flight distance from Houston to Ontario is 1,333 miles (2,146 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as New York to Miami.
What type of aircraft flies from Houston to Ontario?
At 3h 36m, this route typically uses narrow-body or mid-range jets — Boeing 737 MAX or Airbus A320neo. Varies by airline.
What is the carbon footprint of a flight from Houston to Ontario?
Roughly 225 kg CO2 per passenger one-way. That's about the same as driving 1,125 km.
Is the return flight from Ontario to Houston also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Houston to Ontario?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at George Bush Intcntl Houston for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.