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

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

All the information you need to plan the best HOU to ORD flight in 2021: compare Houston to Illinois flight prices with the expected peak season, weather and rainfall in Illinois.
When is the cheapest time to fly from Houston to Illinois (HO1 - IL)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Houston to Illinois as you normally would.

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

August can be a great time to fly to Illinois from Houston with a flight ticket averaging about $130. Cheapflights users have found deals in the month of August for as cheap as $48. The most expensive prices can be found in the month of December.

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

Users have found that booking a flight from Houston to Illinois at least 61 days early can save you up to 15% on average compared to booking a flight this week. If booking 61 days before your flight isn’t an option for you, users have found flights from Houston to Illinois for as little as $135 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $154 for flights departing within the next 3 days.

Cheap flights from Houston to Illinois in November, December 2021

The best prices found for HOU to Illinois flights for November, December
11 Dec - 14 Dec
$79pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
 
1 STOP
IAH
Houston George Bush Intcntl
4 Dec - 6 Dec
$81pp
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
14 Dec - 5 Jan
$82pp
IAH
Houston George Bush Intcntl
Spirit Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
IAH
Houston George Bush Intcntl

Houston to Illinois 2022 flight deals

Cheap flights to Illinois from Houston found for next year
11 Dec - 14 Dec
$79pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
 
1 STOP
IAH
Houston George Bush Intcntl
4 Dec - 6 Dec
$81pp
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
14 Dec - 5 Jan
$82pp
IAH
Houston George Bush Intcntl
Spirit Airlines
 
1 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
10 Jan - 12 Jan
$59pp
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
4 Feb - 7 Feb
$61pp
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
22 Jan - 5 Feb
$63pp
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
10 Dec - 12 Dec
$85pp
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
7 Dec - 18 Jan
$99pp
IAH
Houston George Bush Intcntl
Spirit Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
Non-Stop
IAH
Houston George Bush Intcntl
9 Dec - 15 Dec
$102pp
IAH
Houston George Bush Intcntl
Spirit Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Spirit Airlines
 
1 STOP
IAH
Houston George Bush Intcntl

One-way flights to Illinois from Houston

The cheapest one-way flights from Houston to Illinois
1:45 am - 11:02 am
Multiple Airlines
1 Stop
9h 17m
IAH - STL
Multiple Airlines
$66
Kiwi.com
11:11 am - 12:48 am
Frontier
1 Stop
13h 37m
IAH - STL
Frontier
$70
JustFly
7:25 am - 3:55 pm
Spirit Airlines
1 Stop
8h 30m
IAH - ORD
Spirit Airlines
$72
mytrip.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Houston</span> to <span class="emphasized">Illinois</span> flights.

Flight FAQs

From Houston to Illinois

Which airlines flying from Houston to Illinois have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Houston to Illinois that may be offering flexible cancellation policies are Spirit Airlines, United Airlines, and American Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

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 $59, but on average you can expect to pay $80.

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 $85.

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 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 $23. Frontier flights start at $47 while deals on United Airlines start at $64 one-way.

What are the most popular routes from Houston to Illinois?

While some choose either Houston Hobby - Chicago Midway or Houston George Bush Intcntl - Chicago O'Hare Intl, Houston Hobby - Chicago O'Hare Intl is the most popular route from Houston to Illinois.

What are the cheapest flights from Houston to Illinois?

Looking at all options, your cheapest flight can be booked for $25. While the most popular route (Houston Hobby - Chicago O'Hare Intl) can be booked for $59 on average our data indicates $104 when flying from Houston to Illinois.

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

Major Airline, American Airlines and Delta are the most popular airlines when flying from Houston to Illinois.

COVID Restrictions

View COVID Travel Restrictions for Illinois (IL)

Do I need a COVID test to fly to Illinois from Houston?

Information is based on travel restrictions for travel to Illinois within the United States

Most visitors from Houston need to provide a negative COVID-19 test result and/or quarantine to enter Illinois.

COVID-19 testing requirements
Visitors from Houston must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Illinois.

Quarantine requirements
Visitors from Houston are not required to quarantine after entering Illinois.

Do I need a test to fly back to Houston from Illinois?

Returning to Houston from Illinois

COVID-19 testing requirements
Visitors from Illinois must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Houston.

Quarantine requirements
Visitors from Illinois are not required to quarantine after entering Houston.

Hide COVID Travel Restrictions for Illinois (IL)

Destination points for flights from Houston to Illinois

Select to see more specific information for flights from Houston to all places in Illinois.

Destination information for Illinois

Things to know before you go - useful duration and weather info for your trip from Houston to Illinois.
Flight duration from Houston to Illinois
2h 41m

Airports servicing Houston

George Bush Intcntl (IAH)

Airports servicing

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

Top 6 airlines flying from Houston to Illinois

The chart below displays the airlines Cheapflights users traveling from Houston to Illinois choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
American Airlines
$48 $333 No cancel fee 71%
United Airlines
$48 $346 No cancel fee 69%
Spirit Airlines
$56 $192 No cancel fee 65%
Frontier
$83 $184 No cancel fee 62%
Delta
$87 $376 No cancel fee N/A
Southwest
$134 $346 No cancel fee 63%
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