NH8421 ChicagoORD · 09:15 TokyoNRT · 12:57
NH8421 by All Nippon Airways flies from Chicago (ORD) to Tokyo (NRT) for the Sat, Oct 31 departure.
departs ORD · on schedule
board checked 22m ago · checking again in 45s
Where the minutes go
last 5 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 +0 min · 0 cancelled · 5 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at ORD and NRT are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
Tomorrow on this route
ForecastChicago to Tokyo with All Nippon Airways · Mon 2 Nov, local date
- Chance a departure is cancelled
- 0.4%10.1× usual
- Chance a departure leaves 60+ min late
- 13%0.8× usual
Forecast weather: 74% chance of rain at Chicago; 74% chance of rain at Tokyo
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · About 2 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Chicago to Tokyo flights today
same route · All Nippon AirwaysIf NH8421 is cancelled, these are the other All Nippon Airways nonstop flights from Chicago to Tokyo on the same day, with scheduled departure times in ORD local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →
How NH8421 actually runs
Pro Flight Search has tracked every published board update for NH8421 across the ORD and NRT boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 3 confirmed landings · 3/3 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 NH8421 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: JA772F, JA771F.
Board clocks recorded as ORD and NRT published them.
Planning around NH8421? 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: NH8421 Chicago to Tokyo on-time performance, measured from the ORD and NRT airport boards.
https://proflightsearch.com/flight/NH8421
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