Cheap flights from Illinois to Houston from $93

The month of February is, on average, the cheapest month to fly to Houston George Bush Intcntl Airport from Illinois, with most prices found around $239. If you are unable to visit Houston George Bush Intcntl Airport during the month of February, then departing from Illinois during the month December is also very affordable. Most momondo users find prices during this month for around $240.

The cheapest day to depart from Illinois to Houston George Bush Intcntl Airport is on a Thursday. Travelers who choose to depart for Houston George Bush Intcntl Airport on a Thursday will often find tickets for as low as $327. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Houston George Bush Intcntl Airport on Monday is $520.

Our data shows that the cheapest Illinois to Houston George Bush Intcntl Airport flights are usually those with departure times in the afternoon. Our users have found flights to Houston George Bush Intcntl Airport in the afternoon for as low as $322. Try not to purchase tickets in the morning because they tend to be around $410. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Chicago O'Hare Intl to Houston George Bush Intcntl for the best Illinois - Houston George Bush Intcntl flight prices

You are more likely to see cheaper flights to Houston George Bush Intcntl Airport from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Houston George Bush Intcntl Airport for around $281 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Houston George Bush Intcntl Airport from Illinois for as low as $190 on momondo.

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

Frontier, Delta, and United Airlines are the most popular carriers operating from Illinois to Houston George Bush Intcntl

United Airlines, Frontier and American Airlines are the top three most popular airlines that fly to Houston George Bush Intcntl Airport from Illinois according to our data. United Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Houston George Bush Intcntl Airport. Keep in mind that there are 4 different airlines that fly to Houston George Bush Intcntl Airport on a routine basis, so you have a few additional options to choose from.

As of October 2026, 36 flights take off from Illinois and land in Houston George Bush Intcntl Airport each day. The most common flight departure time for this route is 9:00PM, with 45% of daily flights taking off in the afternoon.

As of October 2026, 252 flights take off from Illinois and land in Houston George Bush Intcntl Airport each week. The most common flight departure day for this route is Fri, with 29% of weekly flights taking off on this day.