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Route guide

Seoul Los Angeles

Incheon International (ICN) — Los Angeles International (LAX)

Westbound
Distance
9,620 km
Duration
12.5h
TZ shift
16h west
Best side
right

Overview

Seoul Incheon to LAX — one of the main US-Korea corridors. The dateline math makes the body clock easier than the calendar; cabin time is still the dominant variable.

Jet lag

16-hour TZ jump, but crossing the dateline makes it feel like an 8-hour westward delay — friendlier than the raw number suggests. Stay up into LA evening, anchor afternoon light, 3-4 days for full adjustment.

Estimated recovery

Without intervention ~11 days
With timed light + melatonin ~7 days

Estimates only — based on ~1 day per time zone west, compressed roughly 40% with a timed protocol. See how long jet lag actually lasts .

Build a ICN→LAX adaptation schedule

Best window side

Westbound across the North Pacific — the right (north) side is the calmer pick through the daylit cruise.

Typical economy row (3-3-3)

Left

Middle

Best · Right

The right window is the calmer pick on this route. For sleep, the window itself matters more than the side — see how to sleep on a long-haul. For the exact rows and seat letters on this aircraft, use the seat picker.

Cabin atmosphere

Korean Air A380 upper deck and Asiana's A350-900 are the comfort picks. 777-300ER is workable on a 12-hour sector, drier than the alternatives.

Expected cabin humidity at cruise

This route's typical aircraft ~15-20%
Indoor air at home ~40-60%

Composite-fuselage aircraft (787, A350) run higher humidity than older aluminum-fuselage types. See what the 787 actually fixes.

What to pack for this route

Read before you fly

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