Cheap flights from Illinois to Houston

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Houston happens to be the city with the highest population for the state of Texas in US. Houston is also the fourth most populated city for U.S.A. It is spread over an area of 1600 kilometer square and has a population of around 2.2 million inhabitants as per the consensus of year 2001. The population of the metropolitan area of Houston is around 5.7 million inhabitants and this is also the largest metropolitan areas amongst all in US.... (read more in our Houston Travel Guide)

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Cheapest flights found for the next 6 months

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Chicago 

Check our newest flight offers to Houston:

  • $87United Airlines flight United Airlines 
    FromToDepartureTime
    Chicago, IL (ORD)Houston, TX (IAH)05/17/201709:25 am
    Houston, TX (IAH)Chicago, IL (ORD)05/23/201705:00 am
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  • $89United Airlines flight United Airlines 
    FromToDepartureTime
    Chicago, IL (ORD)Houston, TX (IAH)05/06/201705:15 am
    Houston, TX (IAH)Chicago, IL (ORD)05/20/201705:00 am
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  • $116United Airlines flight United Airlines 
    FromToDepartureTime
    Chicago, IL (ORD)Houston, TX (IAH)05/09/201709:15 pm
    Houston, TX (IAH)Chicago, IL (ORD)05/16/201705:00 am
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  • $116United Airlines flight United Airlines 
    FromToDepartureTime
    Chicago, IL (ORD)Houston, TX (IAH)05/20/201707:30 am
    Houston, TX (IAH)Chicago, IL (ORD)06/03/201704:49 pm
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  • $151United Airlines flight United Airlines 
    FromToDepartureTime
    Chicago, IL (ORD)Houston, TX (IAH)04/25/201705:15 am
    Houston, TX (IAH)Chicago, IL (ORD)05/09/201701:40 pm
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