WE503 SeoulICN · 11:20 TokyoNRT · 13:50
WE503 by Thai Smile flies from Seoul (ICN) to Tokyo (NRT) for the Mon, Sep 7 departure.
arrived at NRT · 22 min late
⚖ WE503 typically leaves +17 and lands −15. The air wins minutes back.Where the minutes go
last 7 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operationmedian arrival −15 min · 0 cancelled · 9 operations tracked
The route today
live boardsWeather lens
Weather-conditioned outlook for this flight right now
Early read, sample still buildingDriven mainly by NRT (Tokyo), currently flying LIFR (low instrument). For this route and airline, under conditions like today's, over the last 90 days. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Seoul to Tokyo flights today
same route · Thai SmileIf WE503 is cancelled, this is the other Thai Smile nonstop flight from Seoul to Tokyo on the same day, with scheduled departure times in ICN local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WE503 actually runs
Pro Flight Search has tracked every published board update for WE503 across the ICN and NRT boards: schedule changes, gate pushes and actual clocks. Usually lands ~14 min early. Based on 9 confirmed landings · 6/9 within 15 min of schedule. Pushes back late but makes up time in the air.
The verdict above is that record speaking, so it reflects how WE503 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: HL8714.
Board clocks recorded as ICN and NRT published them.
Planning around WE503? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search — WE503 Seoul to Tokyo on-time performance, measured from the ICN and NRT airport boards.
https://proflightsearch.com/flight/WE503
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