Route guide

Jeju to Cheongju-si (CJU-CJJ): Nonstop Upgrade & Award Space

Korean Air, Coyne Aviation, Asiana Airlines, Jin Air, and Arcus-Air Logistic fly nonstop between Jeju (CJU) and Cheongju-si (CJJ), roughly 124 times a week. Because so many carriers compete on this route, premium seats turn over daily, and upgrade or award space can open and close within hours. 2LNR tracks confirmed availability on every CJU to CJJ departure, so you know which flights have space before you book.

Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.

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124
Nonstop flights a week
229 mi
Nonstop distance
Free
To get started

Confirmed upgrade & award space on every CJU to CJJ departure

2LNR tracks confirmed upgrade and award availability on American, Delta, and Alaska and across 30 airlines, segment by segment, date by date. Open the calendar for Jeju to Cheongju-si to see which departures have real space, or watch the route and get alerted when space opens.

See real availability

Confirmed upgrade and award seats on each CJU to CJJ departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See CJU to CJJ on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Jeju to Cheongju-si nonstop

Carriers operating CJU to CJJ nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

  • Korean Air
  • Coyne Aviation
  • Asiana Airlines
  • Jin Air
  • Arcus-Air Logistic
See CJU to CJJ on the interactive map →

Frequently asked questions about CJU to CJJ

How far is Cheongju-si from Jeju?
CJU to CJJ covers about 229 miles nonstop. Flight times vary by aircraft and season; each scheduled departure on this page lists its own times.
Which airlines fly nonstop from CJU to CJJ?
Korean Air, Coyne Aviation, Asiana Airlines, Jin Air, and Arcus-Air Logistic fly the route nonstop. 2LNR tracks confirmed upgrade and award space on all five of them.
How many flights a week are there from CJU to CJJ?
About 124 nonstop flights a week run between Jeju and Cheongju-si in the current schedule, operated by Korean Air, Coyne Aviation, Asiana Airlines, Jin Air, and Arcus-Air Logistic. Frequency shifts by season; the calendar on this page reflects what's currently scheduled.
How do I check upgrade or award availability on CJU to CJJ?
Open the CJU to CJJ calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the Jeju to Cheongju-si route, and 2LNR will notify you when space opens. It's free to start.

Never miss CJU to CJJ upgrade or award space

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