Cheap flights from Houston to Illinois from $45
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Houston to Illinois departing on 5/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Round-trip
1 adult
Economy
0 bags
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Cheap round-trip flights
These are some of the best round-trip flight deals from Houston to Illinois that have been recently found on momondo from popular airlines, departing in the coming months.
Cheap one-way flights
Flying one-way? These are some of the best deals recently discovered on momondo for flights from Houston to Illinois.
Cheap last minute flights
Planning a quick getaway from Houston to Illinois? These are the last-minute flight deals available now.
Cheap direct flights
If you prefer a non-stop journey, check out our latest direct flight deals to Illinois, so you can enjoy a seamless trip without layovers.
Spirit Airlines flights from Houston to Illinois
Our best Spirit Airlines deals on Houston to Illinois flight tickets
Spirit Airlines![Spirit Airlines]()
May 30![Spirit Airlines]()
Jun 4
IAH7:54 pmHouston George Bush Intcntl
2h 45m
ORD10:39 pmChicago O'Hare Intl
ORD9:14 pmChicago O'Hare Intl
2h 45m
IAH11:59 pmHouston George Bush Intcntl
Spirit Airlines![Spirit Airlines]()
May 30![Spirit Airlines]()
Jun 6
IAH7:54 pmHouston George Bush Intcntl
2h 45m
ORD10:39 pmChicago O'Hare Intl
ORD9:14 pmChicago O'Hare Intl
2h 45m
IAH11:59 pmHouston George Bush Intcntl
United Airlines flights from Houston to Illinois
Our best United Airlines deals on Houston to Illinois flight tickets
United Airlines![United Airlines]()
Jul 2![United Airlines]()
Jul 9
IAH9:32 pmHouston George Bush Intcntl
2h 43m
ORD12:15 amChicago O'Hare Intl
ORD7:10 amChicago O'Hare Intl
2h 54m
IAH10:04 amHouston George Bush Intcntl
United Airlines![United Airlines]()
May 28![United Airlines]()
Jun 4
IAH2:45 pmHouston George Bush Intcntl
2h 08m
STL4:53 pmLambert-St Louis
STL11:22 amLambert-St Louis
2h 16m
IAH1:38 pmHouston George Bush Intcntl
See travel insights to Illinois from
How to get the cheapest flight ticket from Houston to Illinois
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
Prices
Airlines
Other information
What is the cheapest month to fly to Illinois?
The cheapest month to fly to Illinois from Houston is in September. Flight prices, which tend to average around $149, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of September, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $158.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Houston to Illinois is on a Wednesday when prices can be found for as low as $297. Flights from Houston to Illinois on a Sunday will generally be more expensive and average around $456. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Houston to Illinois during this time can be as low as $167. Flights at noon are often more expensive with an average ticket price of $732.
What is the cheapest Houston to Illinois flight route?
Fly from Houston George Bush Intcntl to Chicago Midway for the best Houston - Illinois flight prices
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from Houston when booking 6 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $210 when searching 6 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Houston for as low as $146 on momondo.
What cabin class options are available on Houston to Illinois flights?
There are 4 cabin classes available to choose from on Houston to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Houston to Illinois?
Spirit Airlines, Frontier, and Southwest are the most popular carriers operating from Houston to Illinois
What airlines fly to Illinois?
Spirit Airlines, Frontier and American Airlines are the top three most popular airlines that fly to Illinois from Houston according to our data. Spirit Airlines is the first choice among our users, with 32% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 6 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from Houston to Illinois on average per day?
As of April 2025, there are 47 flights per day flying from Houston to Illinois. The most common time of day flights depart is 1:00PM, with 48% of flights taking off in the afternoon.
How many flights depart from Houston to Illinois on average per week?
As of April 2025, 335 flights take off from Houston and land in Illinois each week. The most common flight departure day for this route is Wed, with 25% of weekly flights taking off on this day.
Cheap Houston to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Houston to Illinois
When did momondo last update prices for flights from Houston to Illinois?
Prices for flights from Houston to Illinois are updated daily.
How many operators does momondo search for flights from Houston to Illinois?
As of April 2025, there are 6 operators available to choose from for flights from Houston to Illinois.
How old do you have to be to fly from Houston to Illinois?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Houston to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
Best airlines flying from Houston to Illinois
Compare and see reviews for airlines that fly from Houston to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $52 | Free Cancellation | Rating 5.9 3,287 reviews | |||
| PriceFrom $62 | Free Cancellation | Rating 6.3 7,963 reviews | |||
| PriceFrom $145 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $148 | Free Cancellation | Rating 7.4 8,696 reviews | |||
| PriceFrom $190 | Free Cancellation | Rating 8.0 4,294 reviews | |||
| PriceFrom $216 | Free Cancellation | Rating 8.0 7,934 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Houston to Illinois?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Houston to Illinois. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Houston to Illinois with flexible booking policies on momondo?
momondo does allow users to show only those flights to Illinois from Houston which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Houston to Illinois?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Houston.
I’m not ready to book a flight from Houston to Illinois right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Illinois from Houston. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.
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