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Cheap flights from Houston (IAH) to Illinois (IL)

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How to find the cheapest flight from
Houston (IAH) to Illinois

How far in advance should I book a flight from Houston to Illinois?

Travelers have found it’s best to book a flight 37 days in advance to save up to 10% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 37 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Houston to Illinois 1-2 weeks in advance for as low as $177, or $177 for flights within the next 24 hours.

Cheap flights from Houston to Illinois in August, September 2020

The best prices found for IAH to Illinois flights for August, September
27 Jul - 4 Aug
$32pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
IAH
Houston George Bush Intcntl
19 Jul - 21 Jul
$33pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
IAH
Houston George Bush Intcntl
31 Jul - 2 Aug
$34pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
IAH
Houston George Bush Intcntl

Houston to Illinois 2020 flight deals

Cheap flights to Illinois from Houston found for this year
27 Jul - 4 Aug
$32pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
IAH
Houston George Bush Intcntl
19 Jul - 21 Jul
$33pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
IAH
Houston George Bush Intcntl
31 Jul - 2 Aug
$34pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
IAH
Houston George Bush Intcntl

Non-stop flights to Illinois from Houston

Save time with Houston to Illinois direct flight deals
27 Jul - 4 Aug
$32pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
IAH
Houston George Bush Intcntl
30 Jul - 2 Aug
$33pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
IAH
Houston George Bush Intcntl
31 Jul - 2 Aug
$34pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
IAH
Houston George Bush Intcntl

Last minute flights from Houston to Illinois

Late deals on round-trip flights to Illinois from Houston, departing today and this week
27 Jul - 29 Jul
$32pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
IAH
Houston George Bush Intcntl
26 Jul - 30 Jul
$34pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
IAH
Houston George Bush Intcntl
25 Jul - 28 Jul
$35pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
IAH
Houston George Bush Intcntl

One-way flights to Illinois from Houston

The cheapest one-way flights from Houston to Illinois
12:00 pm - 2:36 pm
Sun Country Air
Nonstop
2h 36m
IAH - ORD
Sun Country Air
$38
Ovago
1:40 am - 4:19 am
Allegiant Air
Nonstop
2h 39m
IAH - ORD
Allegiant Air
$52
Ovago
4:25 pm - 11:19 am
Spirit Airlines
2 Stops
18h 54m
IAH - ORD
Spirit Airlines
$59
Kiwi.com

Related info for your journey

Useful info, stats and facts about Houston to Illinois flights.

Flight FAQs

From Houston to Illinois

Are flight prices decreasing from Houston to Illinois due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Houston and Illinois for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Can I find flights from Houston to Illinois for under $100 on Cheapflights?

Yes, there are multiple flights from Houston to Illinois for under $100. The cheapest flight booked recently is on Spirit Airlines for just $32, but on average you can expect to pay $43.

Are there nonstop flights from Houston to Illinois for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from Houston to Illinois under $100. A good price for a nonstop flight from Houston to Illinois is less than $46.

Are there last-minute flights available from Houston to Illinois for under $100?

There are currently 20+ open flights from Houston to Illinois within the next 7 days for less than $100.

What days are nonstop flights available from Houston to Illinois?

Nonstop flights can be found on the following days: Monday, Wednesday, Friday.

What are the most popular airlines that fly from Houston to Illinois?

Before booking your flight from Houston to Illinois check out the most popular airlines for this route: Major Airline, American Airlines or Delta.

What are the most popular routes from Houston to Illinois?

When deciding which route to take from Houston to Illinois consider Houston George Bush Intcntl - Chicago O'Hare Intl, Houston George Bush Intcntl - Chicago Midway or Houston George Bush Intcntl - Moline Quad-City as they are the most popular.

What are the cheapest Flights from Houston to Illinois?

While on average a flight from Houston to Illinois is generally $125, our data shows the cheapest flight currently is $49. When looking at the most popular route, (Houston George Bush Intcntl - Chicago O'Hare Intl), you can expect to pay $32 for that flight.

What are the most reliable airlines from Houston to Illinois?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Houston to Illinois on time: Air New Zealand(98%), Lufthansa(97%), Austrian Airlines(97%.)

How long is the flight from Houston to Illinois?

Departing from Houston to Illinois will take you 2h 44m. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What is the cheapest airline to fly from Houston to Illinois round-trip?

Spirit Airlines, at $32, was found to be the cheapest airline from Houston to Illinois..

What are the cheapest airlines to fly from Houston to Illinois one-way?

To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $16. Sun Country Air flights start at $38 while deals on Allegiant Air start at $52 one-way.

Destination information for Illinois

Things to know before you go. Useful info for your trip from Houston to Illinois
Flight duration
2h 43m

Airports servicing Houston

Airports servicing

Bloomington (BMI)
Champaign (CMI)
Decatur (DEC)
Moline (MLI)
Marion (MWA)
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