Korean Air and Asiana via Seoul add a world-class North Asian hub break between Los Angeles and Tokyo. Seoul's airport is consistently top-rated; the Seoul to Tokyo second leg is only 2 hours over clean airspace. Useful when nonstop options are sold out or for connections beyond Tokyo.
Worth knowing
Los Angeles to Seoul uses the transpacific corridor — no advisory zone concerns. Seoul to Tokyo is 2 hours over clean Korean/Japanese airspace. No advisory concerns on either leg.
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Flowing
87
Los Angeles → Tokyo
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How it's scored ↓Hide score ↑
Route strength
73
Other paths · Stop quality
Conditions now
100
Closed areas · Flight options
Clean airspace on both legs. Ranks below direct because hub dependency adds total journey time and missed-connection risk. Seoul hub quality (score 0/3) is excellent — the structural penalty is hub dependency alone, not airspace exposure.
Clean Pacific airspace on both legs — no advisory zone exposure at any segment.
Seoul hub scores 0/3 (world-class) with very high Seoul to Tokyo frequency across Korean Air, ANA, and JAL.
The Seoul to Tokyo second leg is only ~2 hours — much shorter than any alternative second leg to Tokyo from a US West Coast departure.
Korean Air and Asiana provide strong Los Angeles to Seoul frequency. Hub break at Seoul is most useful for connecting to other Korean or Japanese cities.
How it's scored ↓Hide score ↑
Route strength
73
Other paths · Stop quality
Conditions now
100
Closed areas · Flight options
Clean airspace on both legs. Ranks below direct because hub dependency adds total journey time and missed-connection risk. Seoul hub quality (score 0/3) is excellent — the structural penalty is hub dependency alone, not airspace exposure.
Clean Pacific airspace on both legs — no advisory zone exposure at any segment.
Seoul hub scores 0/3 (world-class) with very high Seoul to Tokyo frequency across Korean Air, ANA, and JAL.
The Seoul to Tokyo second leg is only ~2 hours — much shorter than any alternative second leg to Tokyo from a US West Coast departure.
Korean Air and Asiana provide strong Los Angeles to Seoul frequency. Hub break at Seoul is most useful for connecting to other Korean or Japanese cities.
Scores are based on official airspace warnings, added flight time, and how many reroute options exist. This is not a safety rating. Always check with your airline before you book.