Are there nonstop flights from Houston (HOU) to Ontario (ONT)?

Yes. Southwest Airlines fly this route. Flight time is about 3h 2m.

What is the fastest connection from Houston (HOU) to Ontario (ONT)?

via Phoenix ≈ 3h 33m, via Austin ≈ 3h 33m, via Las Vegas ≈ 3h 42m (estimated flying time, excluding layovers).

William P. Hobby Airport (HOU) to Ontario International Airport (ONT)・2,160 km

Nonstop flights available (1 airline). Flight time about 3h 2m. Nonstop return flights also operate.

15 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.