$60 Find Cheap Flights from Houston to Illinois - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Houston to Illinois departing on 9/8. 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.
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Cheap Flights from Houston to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicagononstop$171
Moline
Moline1 stop$253
Peoria
Peoria1 stop$249
Champaign
Champaign1 stop$352
Springfield
Springfield1 stop$507
St. Louis
St. Louis1 stop$124
Decatur
Decatur1 stop$402
Chicago
Chicagononstop$171
Moline
Moline1 stop$253
Peoria
Peoria1 stop$249
Champaign
Champaign1 stop$352
Springfield
Springfield1 stop$507
St. Louis
St. Louis1 stop$124
Decatur
Decatur1 stop$402

Book Cheap Houston 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 Houston 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 Houston to Illinois

Wed, Oct 21 - Sat, Oct 24
Frontier Logo
8:44 pm - 9:40 am
IAH
-
STL
12h 56m
1 stop
Frontier Logo
10:35 am - 10:06 pm
STL
-
IAH
11h 31m
1 stop
$124Frontier
Sat, Aug 29 - Mon, Aug 31
Frontier Logo
4:32 pm - 5:22 pm
IAH
-
STL
24h 50m
1 stop
Frontier Logo
6:17 pm - 7:20 am
STL
-
IAH
13h 03m
1 stop
$125Frontier
Sat, Oct 3 - Sat, Oct 3
United Airlines Logo
9:30 am - 12:25 pm
IAH
-
ORD
2h 55mnonstop
United Airlines Logo
7:55 pm - 10:46 pm
ORD
-
IAH
2h 51mnonstop
$183United Airlines
Sat, Aug 22 - Sat, Aug 22
United Airlines Logo
8:25 am - 11:20 am
IAH
-
ORD
2h 55mnonstop
United Airlines Logo
7:52 pm - 10:44 pm
ORD
-
IAH
2h 52mnonstop
$183United Airlines
Wed, Sep 2 - Sat, Sep 12
American Airlines Logo
6:37 pm - 9:46 pm
IAH
-
ORD
3h 09mnonstop
American Airlines Logo
10:30 am - 1:18 pm
ORD
-
IAH
2h 48mnonstop
$183American Airlines
Thu, Aug 20 - Mon, Aug 24
American Airlines Logo
6:07 am - 9:05 am
IAH
-
ORD
2h 58mnonstop
American Airlines Logo
8:00 am - 10:44 am
ORD
-
IAH
2h 44mnonstop
$183American Airlines
Tue, Aug 25 - Wed, Aug 26
Southwest Logo
9:40 am - 12:15 pm
HOU
-
MDW
2h 35mnonstop
Southwest Logo
7:50 am - 10:25 am
MDW
-
HOU
2h 35mnonstop
$183Southwest
Tue, Sep 8 - Tue, Sep 15
Southwest Logo
8:15 am - 10:45 am
HOU
-
MDW
2h 30mnonstop
Southwest Logo
8:25 pm - 10:55 pm
MDW
-
HOU
2h 30mnonstop
$183Southwest
Tue, Aug 18 - Thu, Aug 20
Delta Logo
11:28 am - 4:17 pm
IAH
-
ORD
4h 49m
1 stop
Delta Logo
8:05 am - 1:27 pm
ORD
-
IAH
5h 22m
1 stop
$203Delta
Thu, Aug 27 - Mon, Aug 31
Delta Logo
5:20 am - 1:08 pm
IAH
-
ORD
7h 48m
1 stop
Delta Logo
8:05 am - 3:42 pm
ORD
-
IAH
7h 37m
1 stop
$203Delta
Booking Insights

KAYAK's insights & trends for Houston to Illinois flights

Get data-powered insights and trends into flights from Houston 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 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 to Illinois departing in August.

Flight prices are typical for this route right now.

Flights to Illinois from Houston usually cost between $160 and $312 in August.
The lowest price found in the past 5 days was $171 on Frontier (Aug 13-Aug 20).

What is the cheapest Houston 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 found in the last 5 days was to Chicago, at $173 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 5 days was $173.

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

The average price for all round-trip flights from Houston 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 $240 on average. Morning departures are around 13% cheaper 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 $660.

What is the cheapest month to fly from Houston to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Houston 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 to Illinois is October, when tickets cost $201 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $347 and $330 respectively.

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

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

If you are looking for a flight deal from Houston to Illinois, look for departures on Fridays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Illinois, Thursday is the cheapest day to fly and Monday is the most expensive.

How far in advance should I book a flight from Houston 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 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 to Illinois, you should book around 4 weeks before departure, which saves you about 32% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know

Cheapest flight

$60
Flight from Houston George Bush Airport to St. Louis

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Houston 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 to Illinois.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Houston 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 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 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 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 to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Houston 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 Houston 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.
8.0
SouthwestOverall score based on 4228 reviews
7.5Entertainment
7.0Food
8.0Comfort
8.1Boarding
8.6Crew
Airline reviews

No wifi, seems to be very common with Southwest currently. Everything else was normal.

8.0 ExcellentSean, Jul 2026
HOU - LGB
Read more Southwest reviews

No wifi, seems to be very common with Southwest currently. Everything else was normal.

Flight was delayed by 2 hours, meaning that a flight to Dwnver which should have arrived at 11pm came into the airport at 1 am. Made for a very long day.

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

The flight was smooth. The Southwest experience has degraded overall, but this one was okay.

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

My experience was find with Southwest. The only issue I have is...at the exact time for me to check in...I don't understand how I always end up in C.

Very helpful, convenient, nice crew members, no extra fees, helped us saving 4 hrs of travel by booking is on an earlier flight

Our first flight was so delayed that we had 10 mins to board the next one. We requested if the flight attendant could allow us off there plane first and they denied our request even though I have seen this done before. Luck was on our side that we didn’t miss our next flight.

It was a very good experience. No major issues at all.

Flight was 2 hr. delay, making me miss my connection to my final flight home to Roanoke. Now 12:38am in the morning and I just got the first available ticket at 5:30 pm tomorrow evening. Sleeping in the airport.

It was as good as it could be. Flying is not a pleasant experience these days.

There was an unruly family behind us that made the short flight miserable!!! The cabin crew did nothing to contain it.

Flight delay was frustrating, also you cannot checkin online without delta app, web browser check-in throw errors

bulkhead seat had very little legroom - even in bsiness class.

Got on the plane and sat there for an hour before departure.

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

Cramped seating for me. Luckily it wasn’t a long flight

I loved having a most black flight crew during Black History Month; rather by design or accident I appreciated the representation. ❤️

The experience with United Airlines was excellent; however, the experience with Houston Intercontinental Airport (IAH) was horrible. Although our flight departed from Terminal B, we had to go through security in Terminal C and then get on a train for travel to Terminal B. Additionally, there was significant walking required to get to the boarding location.

Unbelievably smooth boarding at IAH and the flight attendants were top notch.

We flew business fares. Was amazing. However, the check in didn't offer business fares preboarding which is less hectic. 8/10 due to this. Staff compared to Canadian carriers go above and beyond. Would gladly fly United again.

Comfortable seating POS to IAH. Food options were satisfactory. Good seat from IAH to ANC. Food options could be better.

Always pretty good as far as I see it. Staff was friendly and process was quick to get on and off.

There could have been better food options in economy on the long 7hr trip from IAH to AM.

Boarded early, left early, arrived 40 mins early! A win win for me!

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

Overall it was good. I missed my connection but I was put on another flight.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

The flight was ok, i understand Houston-Dallas is a short distance. The plane is really small: no TV, no snacks, but other than that, all was good. We had a bid delay but luckily it did not affect my connection

Nothing, I wont be flying American Airlines again and will not be recommending anyone to fly American Airlines. It was the worst experience flying I've ever had.

Forced to check bags. Crew uninterested in collecting trash. Unclean seats.

There's nothing I liked about it. For first off I scheduled this trip two weeks in advance then they delayed my flight which messed up my whole trip. So I scheduled it for the following weekend thinking there won't be a delay and guess what as soon as I got to the airport we said in the airplane on the tarmac for an hour and a half. Not only was it delayed I missed my connecting flight meaning I had to stay the night at Dallas-Fort Worth airport sleeping on the floor. I will tell you this I will never fly American airlines ever again I have had nothing but horrible experience with them and I just throw money at them

They changed my seat from one that I had paid for as an upgrade to a regular seat at the last minute.

Very aggressive and unhelpful ground crew. Wanted to check my hand luggage for 3 flights. I had lots of delicate items and computer equipment. So the silly lady wanted to rebook 3 international flights because of a carry on. What nonsense. The baggage handler suggested I put it under my seat - so I did. And this was during the rebooking chaos of the Microsoft crash. She was the most arrogant annoying and aggressive ground staff member I’ve met in 20yrs. (AA flight out of Houston).

Left from gate 30 minutes before flight. Never been late to a flight ever. It says 15 minutes before explicitly on the ticket.

Was as expected. Good leg room on planes - much appreciated.

I know that there is nothing than can be done about rude customers. I did find a couple of them were very rude and inconsiderate In my case the guy who was sitting in the same row as I was in, was trying to watch a movie with no headphones, a crew member did ask him to turn it down or off (thumbs up for that.) Another thing, as we were about to land another young man must have taken his phone off airplane mode was talking with his friends and using fowl language which I found inappropriate to the ppl who were sitting in the same row as him and other ppl around him. I understand how no one wanted to address this person and not get involved. We all just wanted to get home safely with out any incident.

The food service was limited and not good. For a seven hour flight they could do better.

We were delayed three times ,and that destroyed my plans, and reservations

The reps working at the airport counter were dumber than a second coat of paint.

Delayed each time on a round trip with no significant weather interference. Updates to flight times came after the fact. 30 min behind in boarding and board and phone still show an on time departure. Some mysterious extra 300 miles that came so surprising they had to fuel while we were already on board?

Airline changed the gate from Terminal A to Terminal D which is quite far and only sent a text message few minutes before boarding. Around 50 people missed their flight and as plane didn’t wait for them.

Bad experience… crew are extremely strict with personal bags… they overcharge me coz my bag was one inch H

Well I mean u get what u pay for so 🤷‍♂️

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Plane was clean but they do not allow bag drop until 1 hour before flight. Just encouraging late fees and other issues. The worst I have experienced. Total hostage situation, pay or you miss your flight.

Everything was good, and most importantly on time. They have been extremely tardy in some of my flights

Flight delayed an hour. The turbulence was insane. Packed in like sardines. A coke was $4.95 no snack or a drink crazy

Everything you need to know for your flight from Houston to Illinois

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.