$63 Find Cheap Flights from Houston George Bush Airport to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from George Bush Intcntl to Illinois departing on 5/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Houston to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Houston to Illinois, as well as popular online travel agencies
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Cheap Flights from George Bush Intcntl to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicagononstop$113
Moline
Moline1 stop$243
Peoria
Peoria1 stop$277
Springfield
Springfield1 stop$425
St. Louis
St. Louis2 stops$295
Decatur
Decatur1 stop$384
Marion
Marion1 stop$336
Chicago
Chicagononstop$113
Moline
Moline1 stop$243
Peoria
Peoria1 stop$277
Springfield
Springfield1 stop$425
St. Louis
St. Louis2 stops$295
Decatur
Decatur1 stop$384
Marion
Marion1 stop$336

Book Cheap George Bush Intcntl to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from George Bush Intcntl to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from George Bush Intcntl to Illinois

Tue, May 12 - Thu, May 21
Frontier Logo
8:12 pm - 11:01 pm
IAH
-
ORD
2h 49mnonstop
Frontier Logo
4:05 pm - 7:17 pm
ORD
-
IAH
3h 12mnonstop
$113Frontier
Tue, Jun 2 - Thu, Jun 4
Multiple Airlines Logo
7:20 am - 9:59 am
IAH
-
ORD
2h 39mnonstop
Multiple Airlines Logo
4:05 pm - 7:17 pm
ORD
-
IAH
3h 12mnonstop
$114Multiple Airlines
Thu, May 21 - Tue, May 26
Frontier Logo
6:10 am - 7:41 pm
IAH
-
ORD
13h 31m
1 stop
Frontier Logo
4:05 pm - 7:17 pm
ORD
-
IAH
3h 12mnonstop
$115Frontier
Tue, May 19 - Wed, May 20
Frontier Logo
8:12 pm - 11:01 pm
IAH
-
ORD
2h 49mnonstop
Frontier Logo
3:55 pm - 8:50 am
ORD
-
IAH
16h 55m
1 stop
$116Frontier
Wed, Jun 3 - Tue, Jun 9
Delta Logo
7:00 am - 11:56 am
IAH
-
MDW
4h 56m
1 stop
Delta Logo
6:00 am - 11:23 am
MDW
-
IAH
5h 23m
1 stop
$197Delta
Sat, Jun 6 - Wed, Jun 10
Delta Logo
5:25 pm - 10:21 pm
IAH
-
MLI
4h 56m
1 stop
Delta Logo
5:17 pm - 11:59 pm
MLI
-
IAH
6h 42m
1 stop
$243Delta
Sat, May 30 - Sat, Jun 6
American Airlines Logo
6:29 pm - 11:55 pm
IAH
-
MLI
5h 26m
1 stop
American Airlines Logo
6:52 pm - 11:59 pm
MLI
-
IAH
5h 07m
1 stop
$276American Airlines
Sat, Aug 15 - Sat, Aug 22
United Airlines Logo
7:20 am - 12:44 pm
IAH
-
PIA
5h 24m
1 stop
United Airlines Logo
10:35 am - 5:14 pm
PIA
-
IAH
6h 39m
1 stop
$277United Airlines
Sat, Jun 6 - Wed, Jun 10
American Airlines Logo
2:04 pm - 12:11 am
IAH
-
MLI
10h 07m
2 stops
American Airlines Logo
6:52 pm - 11:59 pm
MLI
-
IAH
5h 07m
1 stop
$281American Airlines
Tue, May 26 - Tue, Jun 9
United Airlines Logo
8:30 pm - 10:45 pm
IAH
-
STL
2h 15mnonstop
United Airlines Logo
8:35 am - 10:52 am
STL
-
IAH
2h 17mnonstop
$304United Airlines
Booking Insights

KAYAK's insights & trends for George Bush Intcntl to Illinois flights

Get data-powered insights and trends into flights from George Bush Intcntl to Illinois to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Houston George Bush Intcntl Airport to Illinois?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Houston George Bush Intcntl Airport to Illinois departing in May.

What is the cheapest Houston George Bush Intcntl Airport to Illinois flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Illinois from Houston George Bush Intcntl Airport found in the last 72 hours was to Chicago, at $94 round-trip. The most popular route is from Houston George Bush Intcntl Airport (IAH) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $94.

What is the cheapest time of day to fly to Illinois?

The average price for all round-trip flights from Houston George Bush Intcntl Airport to Illinois depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Illinois is generally at night, when round-trip flights cost $214 on average. Morning departures are around 5% more expensive than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $659.

Can I save money by flying with a layover from Houston George Bush Intcntl Airport to Illinois?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $274, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Houston George Bush Intcntl Airport to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Houston George Bush Intcntl Airport to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Houston George Bush Intcntl Airport to Illinois is August, when tickets cost $38 (return) on average. On the other hand, the most expensive months are March and June, when the average cost of round-trip tickets is $66 and $60 respectively.

What’s the cheapest day of the week to fly from Houston George Bush Airport to Illinois?

The average price of all round-trip flights from Houston George Bush Intcntl Airport to Illinois clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Illinois on a Friday and more expensive on a Monday. On your return trip to Houston George Bush Airport, you should consider flying back on a Thursday, and avoid Mondays for better deals.

How far in advance should I book a flight from Houston George Bush Intcntl Airport to Illinois?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Houston George Bush Intcntl Airport to Illinois, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Houston George Bush Intcntl Airport to Illinois, you should book around 3 weeks before departure, which saves you about 44% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$59
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from Houston George Bush Airport to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Houston George Bush Airport to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Houston George Bush Airport to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Houston George Bush Airport to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Houston George Bush Airport to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Houston George Bush Airport to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Houston George Bush Airport to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Houston George Bush Airport to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Houston George Bush Airport to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Houston George Bush Airport to the following destinations at these prices or less: Chicago $138 one-way - $231 round-trip

Reviews of the top 5 airlines serving from George Bush Intcntl to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Houston to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from George Bush Intcntl to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8465 reviews
7.9Comfort
7.8Entertainment
8.5Crew
8.1Boarding
7.2Food
Airline reviews

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

4.0 OkayBradley, Apr 2026
RDU - ATL
Read more Delta reviews

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

Very easy to use and convenient, you can perform any action within the same portal

In a world of delays, Delta was on time both ways! Boarding was fast and efficient. Staff was friendly. AND wifi worked.

WiFi didn’t work. Flight delayed 3 hours Crew members were illiterate Seat lean back did not work.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

This wasn't my experience with Delta. It was just the Pegasus flight. Seats were very hard. Staff was kinda rough. Not very nice. Charged me for snacks. For a 4 hour flight I would've expected more.

It's a long flight and I would have liked better snacks between lunch and the arrival meal. It's fine to have fruit and nuts but I really don't like ramen because it's salty junk soup. I'd suggest sandwiches. They're not expensive nor are they hard to store for a long flight. The FA's had a couple of big services and they were super busy preparing, executing and then cleaning up. Then they disappeared.

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

I've been flying American mostly, and it's been very frustrating. This united flight makes me realize maybe the issue isn't flying, but the airline. United was a significantly better experience. The plane was more comfortable, with a normal amount of leg room (vs the ridiculous reductions AA has made), more comfortable seats, screens to watch movies. It was a much better experience!

We had excellent customer service despite the chaos at George Bush airport in Houston!

It isvvery small flight. No leg room . No space to put my personal item at feet.

Didn't make the flight because the first leg of my flight was canceled and the next leg was already booked.

Terrible because it was cancelled due to volcanic ash clouds in Guatemala while all other airlines kept flying. Had to pay for a hotel to stay overnight in Houston and try to fly next day.

Overall we had a good experience during our flight from San Francisco to Houston.

Airport terminal was outdated, flight was on a small jet with no wifi

The crew made our experience extremely bad. They were rude and didn’t have anything for kids.

It was good, the staff was great, and the food, was as usual, tea and biscuit. Bathroom was clean, and the plane was clean as well.

Very good I can’t complain one bit. Thank you American Airlines for making my flight enjoyable and safe!

The staff and service on American Airlines were truly outstanding. I had requested wheelchair assistance for my mother due to her knee issues, and the team went above and beyond every step of the way—from boarding in Boston to our arrival in Chicago. Their care, professionalism, and attentiveness made the entire experience smooth and stress-free. I’m very grateful for the support they provided.

The new planes (American Eagle) are beautiful and especially comfortable. The flight attendants are consistently professional and courteous. And, while it may seem inconsequential, the new liquid tube of coffee creamer—in contrast to the powdered coffee creamer—makes all the difference in a cup of coffee.

Boarding was quick and efficient. We arrived at our destination early.

I'm not sure American is capable of on-time arrivals and departures. When you land at ORD, you almost always get held on the tarmac because your gate is still occupied. I may have missed my connection, but that ended up up being significantly delayed as well. Once again, I finally got home well after midnight.

Crew at the gate was very crabby and not at all polite. The plane was very hot the entire flight. And the seat cushion was very worn out.

The staff are very, very professional. It's what flying should feel like.

Flight was delayed half hour before boarding, but when I checked flight aware the plane that would Pick us up had a delay of more than an hour. AA should let us know in advance to avoid waiting several hours in the airport

Delays with no explanation. It could have been handled better.

They didn’t put my luggage on my transfer so I had to spend the night in Detroit. They said my luggage would be here in the morning and they’re still searching for it. It did not arrive apparently.

My first time experience with Spirit Air was not good at all.The reason i did not know to cancel 24Hrs before flight depature you do charge cancellation fee. It's ridiculous policy.Actually you should provide full voucher instead of charging cancellation fee. Confirmation Code# ZNVPHG Thanks Much , Rita S

That this is my second time the they cancel flights and they always wait until the last minute to let people know

Spirit is awful. Do not fly spirit. Nothing but delays, cancellations.

Nothing. We didn’t even have a pilot until one hour after our flight was set to depart and now we are waiting for a gate on a very hot packed aircraft. Spirit has lost its goddamn minds and we will never fly again. On the way down the delay went from 5 minutes to 6 hours to cancelled.

Flight delayed twice (not Spirit fault) No food served* No entertainment * *in response to my choices in the rating. None was provided so couldn’t rate properly

Delayed 11 hours with two being on our destinations tarmac, no compensation or refund and was told I would actually get charged a $200 cancellation fee if I decided to switch airlines for my return flight. For their inconvenience they gave a $10 meal voucher to split between two people in a airport.

Like Spirit but bad that you have to pay for water 🙃

If there are delays, it takes less than a minute for a Spirit employee to make an announcement. It’s very simple.

For a change, friendly staff at check-in and in flight.

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

My flight was originally from SAT to MCO connecting from MCO to ORD. We got diverted to ATL and than Frontier staff there was sooo un helpful first they said they couldn’t give us any accommodation since our flight first got delayed that cancelled and now it’s 221am and I am still in ATL since they said they need to create a new flight my final destination is ORD and I have been delayed twice and cancelled. With no real help the frontier app didn’t work no email updates over all such a horrible experience

There's no seats that lean back with little leg space i wad uncomfortable the entire flight. Your charges for extra baggage is despicable and costly!!

Remind customers of the need to have passport or new ID for boarding.

Everything you need to know for your flight from George Bush Intcntl to Illinois

Information on your arrival and departure airports