CJJ to USN, Cheongju International Airport to Ulsan Airport Cheap Flights

Based on HopeGoo data, Eastar Jet offers one-way fares as low as US$36 on Cheapest nonstop routes (e.g. CJJ to USN on Tue, Feb 10), while T'Way Air offers Cheapest nonstop round-trips from US$99 departing on Mon, Feb 9 and returning on Wed, Feb 11.

By analyzing data from all airlines on the HopeGoo flight calendar, it looks like the best time to book a flight from Cheongju to Ulsan is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

To find best deals on flights from Cheongju to Ulsan, you can use various tools on HopeGoo: · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Feb 10, with one-way flights priced at just US$36. · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Eastar Jet. · Set up price alerts to easily monitor ticket prices without having to check every day. · Check HopeGoo flight deals and promo codes frequently. · Avoid peak season unless you book very early. It seems the peak season for Ulsan travel is around July. · Get exclusive promo codes for HopeGoo app users.

The cheapest months to fly from Cheongju to Ulsan is September, when demand for travel is lower.

After crunching the numbers on our February flight calendar, it's currently cheapest to fly from Cheongju to Ulsan on February 9, 2026 with T'Way Air, with prices starting at US$99.

The time difference between Ulsan and Cheongju is 0h.

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