Travelers have found it’s best to book a flight 18 days in advance to save up to 24% 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 18 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 Illinois to Detroit 1-2 weeks in advance for as low as $195, or $259 for flights within the next 24 hours.
April can be a great time to fly to Detroit from Illinois with a flight ticket averaging about $204. Cheapflights users have found deals in the month of April for as cheap as $35. The most expensive prices can be found in the month of December.
||$138||$237||No cancel fee||65%|
||$89||$278||No cancel fee||69%|
||$94||$282||No cancel fee||N/A|
||$89||$426||No cancel fee||71%|