Trip.com
>
Flights
>
Flights to South Korea
>
Cheap Flights to Ulsan
Hotels in Ulsan
>
Low Price Flights from Cheongju to Ulsan

Explore the cheapest flights from Cheongju to Ulsan in the next three months. Based on Trip.com's data from the latest 7 days, one-way fares start at HK$ 186, and round-trip tickets start at HK$ 527.

      • CJJ 18:10
        18h
        1 stop
        USN 12:10
        Cheongju - Ulsan | Wed, Dec 10 | T'Way Air
        USN 12:50
        10h 15m
        1 stop
        CJJ 23:05
        Ulsan - Cheongju | Wed, Dec 17 | Jin Air
        HK$ 527 HK$ 804
        34% OFF
        34% OFF
        HK$ 804 HK$ 527
      • CJJ 19:35
        16h 35m
        1 stop
        USN 12:10
        Cheongju - Ulsan | Wed, Dec 10 | Eastar Jet
        USN 12:50
        10h 5m
        1 stop
        CJJ 22:55
        Ulsan - Cheongju | Wed, Dec 17 | Jin Air
        HK$ 528 HK$ 804
        34% OFF
        34% OFF
        HK$ 804 HK$ 528
      • CJJ 17:45
        18h 25m
        1 stop
        USN 12:10
        Cheongju - Ulsan | Wed, Dec 10 | Jin Air
        USN 12:50
        4h 20m
        1 stop
        CJJ 17:10
        Ulsan - Cheongju | Wed, Dec 17 | Jin Air
        HK$ 625 HK$ 804
        22% OFF
        22% OFF
        HK$ 804 HK$ 625
      • CJJ 19:15
        16h 55m
        1 stop
        USN 12:10
        Cheongju - Ulsan | Wed, Dec 10 | Jeju Air
        USN 12:50
        5h 50m
        1 stop
        CJJ 18:40
        Ulsan - Cheongju | Wed, Dec 17 | Jin Air
        HK$ 629
        22% OFF
        HK$ 804 HK$ 629
      • CJJ 19:35
        16h
        1 stop
        USN 11:35
        Cheongju - Ulsan | Thu, Dec 11 | Eastar Jet
        USN 12:50
        10h 5m
        1 stop
        CJJ 22:55
        Ulsan - Cheongju | Thu, Dec 18 | Jin Air
        HK$ 691
        14% OFF
        HK$ 804 HK$ 691
      • CJJ 20:10
        14h 35m
        1 stop
        USN 10:45
        Cheongju - Ulsan | Mon, Dec 15 | T'Way Air
        USN 15:50
        16h 50m
        1 stop
        CJJ 08:40
        Ulsan - Cheongju | Tue, Dec 16 | Korean Air
        HK$ 692
        14% OFF
        HK$ 804 HK$ 692
      • CJJ 19:35
        15h 10m
        1 stop
        USN 10:45
        Cheongju - Ulsan | Mon, Dec 15 | Eastar Jet
        USN 15:50
        16h 50m
        1 stop
        CJJ 08:40
        Ulsan - Cheongju | Tue, Dec 16 | Korean Air
        HK$ 693
        14% OFF
        HK$ 804 HK$ 693
      • CJJ 19:15
        15h 30m
        1 stop
        USN 10:45
        Cheongju - Ulsan | Mon, Dec 15 | Jeju Air
        USN 15:50
        16h 50m
        1 stop
        CJJ 08:40
        Ulsan - Cheongju | Tue, Dec 16 | Korean Air
        HK$ 712
        11% OFF
        HK$ 804 HK$ 712
      • CJJ 17:45
        17h
        1 stop
        USN 10:45
        Cheongju - Ulsan | Mon, Dec 15 | Jin Air
        USN 15:50
        16h 50m
        1 stop
        CJJ 08:40
        Ulsan - Cheongju | Tue, Dec 16 | Korean Air
        HK$ 712
        11% OFF
        HK$ 804 HK$ 712
      • CJJ 20:10
        15h 25m
        1 stop
        USN 11:35
        Cheongju - Ulsan | Thu, Dec 11 | T'Way Air
        USN 12:50
        10h 15m
        1 stop
        CJJ 23:05
        Ulsan - Cheongju | Thu, Dec 18 | Jin Air
        HK$ 715
        11% OFF
        HK$ 804 HK$ 715
      • CJJ 13:00
        17h 25m
        1 stop
        USN Invalid Date
        Cheongju - Ulsan | Fri, Dec 12 | Normal Airline
        USN 15:00
        6h
        Direct
        CJJ 16:00
        Ulsan - Cheongju | Sun, Dec 14 | Normal Airline
        Find More Flights
        Find More Flights
      • CJJ 20:30
        15h 40m
        1 stop
        USN 12:10
        Cheongju - Ulsan | Wed, Dec 10 | Aero K Airlines
        HK$ 186 HK$ 616
        70% OFF
        70% OFF
        HK$ 616 HK$ 186
      • CJJ 19:35
        16h 35m
        1 stop
        USN 12:10
        Cheongju - Ulsan | Wed, Dec 10 | Eastar Jet
        HK$ 188 HK$ 616
        70% OFF
        70% OFF
        HK$ 616 HK$ 188
      • CJJ 20:10
        16h
        1 stop
        USN 12:10
        Cheongju - Ulsan | Wed, Dec 17 | T'Way Air
        HK$ 199 HK$ 616
        68% OFF
        68% OFF
        HK$ 616 HK$ 199
      • CJJ 20:10
        16h
        1 stop
        USN 12:10
        Cheongju - Ulsan | Wed, Dec 10 | T'Way Air
        HK$ 203
        67% OFF
        HK$ 616 HK$ 203
      • CJJ 17:45
        18h 25m
        1 stop
        USN 12:10
        Cheongju - Ulsan | Wed, Dec 10 | Jin Air
        HK$ 203
        67% OFF
        HK$ 616 HK$ 203
      • CJJ 19:15
        15h 30m
        1 stop
        USN 10:45
        Cheongju - Ulsan | Wed, Dec 10 | Jeju Air
        HK$ 227
        63% OFF
        HK$ 616 HK$ 227
      • CJJ 19:35
        16h 35m
        1 stop
        USN 12:10
        Cheongju - Ulsan | Wed, Dec 17 | Eastar Jet
        HK$ 259
        57% OFF
        HK$ 616 HK$ 259
      • CJJ 19:15
        16h 20m
        1 stop
        USN 11:35
        Cheongju - Ulsan | Thu, Dec 11 | Jeju Air
        HK$ 292
        53% OFF
        HK$ 616 HK$ 292
      • CJJ 20:30
        15h 5m
        1 stop
        USN 11:35
        Cheongju - Ulsan | Thu, Dec 11 | Aero K Airlines
        HK$ 307
        50% OFF
        HK$ 616 HK$ 307
      • CJJ 19:35
        16h
        1 stop
        USN 11:35
        Cheongju - Ulsan | Thu, Dec 11 | Eastar Jet
        HK$ 548
        11% OFF
        HK$ 616 HK$ 548
      • CJJ 13:00
        17h 25m
        1 stop
        USN Invalid Date
        Cheongju - Ulsan | Fri, Dec 12 | Normal Airline
        Find More Flights
        Find More Flights

Displayed flight fares from Cheongju to Ulsan are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Cheongju to Ulsan Flight Details

The distance between Cheongju and Ulsan is approximately 207.98km. Based on Trip.com's data travel demand peaks in July. The off-season for travel is September.

Cheapest one-way flight priceHK$ 186
Cheapest return ticket priceHK$ 527
Off-season for travelSeptember
Peak season for travelJuly
Flight distance207.98km

Best Time to Book Flights from Cheongju to Ulsan

The cheapest flights from Cheongju to Ulsan are available between Dec 14 and Dec 21, with one way flights starting from HK$ 259.

Cheapest flights
From price
Search
  • 714
  • 1421
  • 2128

  • Jan

    284
  • 411
  • 1118
  • 1825

  • Feb

    251
  • 18
  • 815
  • 1522

  • Mar

    221
Displayed fare trends are based on Trip.com's aggregated average of the lowest flight prices from Cheongju to Ulsan, calculated over the upcoming 10 weeks.

Flight FAQs

  • Which airlines offer the cheapest flights from Cheongju (CJJ) to Ulsan (USN)?

    Based on Trip.com data, Aero K Airlines offers one-way fares as low as HK$ 186 on Cheapest nonstop routes (e.g. CJJ to USN on Wed, Dec 10), while T'Way Air offers Cheapest nonstop round-trips from HK$ 527 departing on Wed, Dec 10 and returning on Wed, Dec 17.
  • By analyzing data from all airlines on the Trip.com 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 Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Wed, Dec 10, with one-way flights priced at just HK$ 186.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Aero K Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com 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 Trip.com 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 December flight calendar, it's currently cheapest to fly from Cheongju to Ulsan on December 10, 2025 with T'Way Air, with prices starting at HK$ 526.
  • The time difference between Ulsan and Cheongju is 0h.
  • Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

More Cheap Flights & Deals on Trip.com