To save up to 57% on this flight, we recommend booking at least 17 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Cheongju to Illinois from $1,088 1-2 weeks out and tickets from $2,327 for flights departing within the next 72 hours.
Flights from Cheongju to Illinois lean towards being more expensive in August. Prices are generally better when you fly from Cheongju to Illinois in November, with the cheapest ticket starting at $695.
When flying from Cheongju 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.
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