Cheap flights from Ontario to Houston from $73

The month of October is, on average, the cheapest month to fly to Houston from Ontario, with most prices found around $211. The month of September is another great option to travel to Houston, with average flight prices from Ontario averaging around $266.

On average, the least expensive day to fly to Houston from Ontario is on a Saturday. momondo users have found tickets for Saturday departures for as low as $406. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Houston on Sunday is $519.

Our data shows that the cheapest Ontario to Houston flights are usually those with departure times at noon. Our users have found flights to Houston at noon for as low as $313. Try not to purchase tickets in the evening because they tend to be around $496. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Ontario to Houston George Bush Intcntl for the best Ontario - Houston flight prices

You are more likely to see cheaper flights to Houston from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Houston for around $326 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Houston from Ontario for as low as $234 on momondo.

There are 4 cabin classes available to choose from on Ontario to Houston flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Delta, Southwest, and United Airlines are the most popular carriers operating from Ontario to Houston

United Airlines, Frontier and Southwest are the top three most popular airlines that fly to Houston from Ontario according to our data. United Airlines is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Houston. Keep in mind that there are 6 different airlines that fly to Houston on a routine basis, so you have a few additional options to choose from.

Historically, on average around 13% of flights between Ontario and Houston have experienced a delay on any given week. The average delay length over the past 12 months has been 120 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Sunday is statistically the day of the week which experiences the fewest number of delays on this flight route. Monday has historically seen more delays on average compared to the rest of the week.

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 6% of their flights experiencing any sort of delay.

As of September 2026, there are 2 flights per day flying from Ontario to Houston. The most common time of day flights depart is 9:00AM, with 100% of flights taking off at noon.

The number of flights available between Ontario and Houston is 14 per week as of September 2026. The most frequent departure day is Mon, with 29% of weekly flights leaving on this day.