Our data shows that August tends to be the cheapest month to fly to Illinois from Houston George Bush Intcntl Airport. Users have commonly found prices around $130 for the month, but tickets can be as low as $48. Due to multiple factors, prepare for potentially higher prices in December.
To save up to 15% on this flight, we recommend booking at least 61 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Houston George Bush Intcntl Airport to Illinois from $135 1-2 weeks out and tickets from $154 for flights departing within the next 72 hours.
When flying from Houston George Bush Intcntl Airport to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
||$48||$342||No cancel fee||71%|
||$48||$394||No cancel fee||69%|
||$57||$167||No cancel fee||65%|
||$83||$184||No cancel fee||62%|
||$87||$353||No cancel fee||N/A|