How to find the cheapest flight from
Illinois to South Dakota
How far in advance should I book a flight from Illinois to South Dakota?
To save up to 42% on this flight, we recommend booking at least 21 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Illinois to South Dakota from $224 1-2 weeks out and tickets from $312 for flights departing within the next 72 hours.
What is the cheapest month to fly from Illinois to South Dakota?
Due to multiple factors, expect to potentially pay more when booking in October. For low rates, July can be a great choice for travel to South Dakota. Flights to South Dakota from Illinois in July are about $250 on average during July, but can be found for as low as $107.
One-way flights to South Dakota from Illinois
The cheapest one-way flights from Illinois to South Dakota
9:20 am - 10:50 am
3:18 am - 6:39 am
Related info for your journey
Useful info, stats and facts about Illinois to South Dakota flights.
Destination information for South Dakota
Things to know before you go. Useful info for your trip from Illinois to South Dakota
Rapid City (RAP)
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