Route guide

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

Jin Air, Korean Air, Coyne Aviation, Asiana Airlines, and Arcus-Air Logistic fly nonstop between Cheongju-si (CJJ) and Jeju (CJU), roughly 122 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 CJJ to CJU 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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122
Nonstop flights a week
229 mi
Nonstop distance
Free
To get started

Confirmed upgrade & award space on every CJJ to CJU 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 Cheongju-si to Jeju 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 CJJ to CJU 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 CJJ to CJU on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Cheongju-si to Jeju nonstop

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

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

Frequently asked questions about CJJ to CJU

How far is Jeju from Cheongju-si?
CJJ to CJU 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 CJJ to CJU?
Jin Air, Korean Air, Coyne Aviation, Asiana Airlines, 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 CJJ to CJU?
About 122 nonstop flights a week run between Cheongju-si and Jeju in the current schedule, operated by Jin Air, Korean Air, Coyne Aviation, Asiana Airlines, 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 CJJ to CJU?
Open the CJJ to CJU calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the Cheongju-si to Jeju route, and 2LNR will notify you when space opens. It's free to start.

Never miss CJJ to CJU upgrade or award space

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