Direct (nonstop) flights from Ontario to Houston
2 airlines fly nonstop from Ontario International Airport (ONT) to George Bush Intcntl Houston (IAH). It's 1,333 miles (2,146 km), about 3h 11m 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 Ontario to Houston with one stop · direct emits 225 kg CO₂ per passenger
Looking for the return flight?
IAH → ONT: Flights from Houston to OntarioOther direct flights from Ontario
Direct flights from Houston (IAH)
Frequently Asked Questions
How long is the direct flight from Ontario to Houston?
A nonstop flight from Ontario (ONT) to Houston (IAH) takes approximately 3 hours and 11 minutes. The distance is 1,333 miles (2,146 km).
Which airlines fly nonstop from Ontario to Houston?
2 airlines: Frontier Airlines, United Airlines.
Is there a nonstop flight from Ontario to Houston?
Yes. 2 airlines: Frontier Airlines, United Airlines.
How far is Ontario from Houston?
The flight distance from Ontario to Houston 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 Ontario to Houston?
At 3h 11m, 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 Ontario to Houston?
Roughly 225 kg CO2 per passenger one-way. That's about the same as driving 1,125 km.
Is the return flight from Houston to Ontario 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 Ontario to Houston?
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 Ontario International Airport for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.