To save on the cost of your flight from Oklahoma City to Illinois, book at least 50 days before your planned departure. Booking around this time can save you about 55% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $311 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $411.
When flying from Oklahoma City 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.
Our data shows that August tends to be the cheapest month to fly to Illinois from Oklahoma City. Users have commonly found prices around $246 for the month, but tickets can be as low as $156. Due to multiple factors, prepare for potentially higher prices in October.
||$107||$257||No cancel fee||69%|
||$109||$367||No cancel fee||71%|
||$244||$403||No cancel fee||N/A|