Cheju to Seoul is 273 miles (440 km), a flight of about 1 hour.
Right-side seats deliver superior views for both segments: the dramatic volcanic landscape and island geography during departure, and adequate views during approach. Left seats favor only the landing phase, making right the better choice for the complete journey.
Flight Path
The flight path crosses the Strait of Korea (Korea Strait) at roughly 35°N latitude. At cruise altitude (around 25,000 feet), the midpoint offers views of open water with occasional shipping traffic visible below. The mainland coast of South Korea becomes visible around 20 minutes into flight, with the Jeolla region's irregular coastline and numerous small islands appearing as the aircraft approaches Incheon airspace. The Honam region's low mountains may be visible on the horizon during clear conditions.
Great circle distance and headings ›Phase by phase
Takeoff from CJU
RIGHTRight-side seats capture Jeju's volcanic landscape and the island's southern coastline during initial climb. The view extends across Hallasan (the island's central volcano) and the surrounding terrain before turning north toward Incheon.
Landing at ICN
LEFTLeft-side seats offer the best approach views into Incheon, with clear sightlines of the Yellow Sea, Incheon's harbor infrastructure, and the approach path over water before touchdown. Typical runway headings (16L/34R or 16R/34L) mean northbound approaches favor left-side views of the descent corridor.
Landmarks on this routeAll landmarks →
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About This Route
Which side of the plane should I sit on flying from Jeju International (CJU) to Incheon International (ICN)?
Sit on the Right side of the plane for the best views on flights from Cheju to Seoul. Right-side seats deliver superior views for both segments: the dramatic volcanic landscape and island geography during departure, and adequate views during approach. Left seats favor only the landing phase, making right the better choice for the complete journey.
What can I see during takeoff from Jeju International in Cheju?
During takeoff from Jeju International (CJU), sit on the Right side for the best views. Right-side seats capture Jeju's volcanic landscape and the island's southern coastline during initial climb. The view extends across Hallasan (the island's central volcano) and the surrounding terrain before turning north toward Incheon. Notable sights include: Hallasan volcano (central peak, 6,398 ft elevation), Jeju's southern coastal cliffs, the island's irregular shoreline, and the Strait of Korea opening northward.
What can I see when landing at Incheon International in Seoul?
When landing at Incheon International (ICN), sit on the Left side for the best views. Left-side seats offer the best approach views into Incheon, with clear sightlines of the Yellow Sea, Incheon's harbor infrastructure, and the approach path over water before touchdown. Typical runway headings (16L/34R or 16R/34L) mean northbound approaches favor left-side views of the descent corridor. Notable sights include: Incheon International Airport's two parallel runways and taxiway network, Incheon Harbor and container terminals, the Yellow Sea with shipping traffic, and the Gyeonggi Bay coastline.
How long is the flight from Cheju to Seoul?
The flight from Jeju International (CJU) to Incheon International (ICN) takes about 1 hour. The shortest flight path between them is 273 miles (440 km); winds and air traffic control usually add a few percent.
What does the Cheju to Seoul flight path pass over?
The flight path crosses the Strait of Korea (Korea Strait) at roughly 35°N latitude. At cruise altitude (around 25,000 feet), the midpoint offers views of open water with occasional shipping traffic visible below. The mainland coast of South Korea becomes visible around 20 minutes into flight, with the Jeolla region's irregular coastline and numerous small islands appearing as the aircraft approaches Incheon airspace. The Honam region's low mountains may be visible on the horizon during clear conditions.