AA4921 BoiseBOI · 08:00 MontereyMRY · 09:22
AA4921 by American Airlines flies from Boise (BOI) to Monterey (MRY).
Same number through BOI → PHX → MRY
scheduled from BOI
Where the minutes go
last 3 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at BOI and MRY 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 at Boise
ForecastWed 4 Nov, local date
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
Tomorrow at Phoenix
ForecastWed 4 Nov, local date
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · 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 Boise to Monterey flights today
same route · American AirlinesIf AA4921 is cancelled, these are the other American Airlines nonstop flights from Boise to Monterey on the same day, with scheduled departure times in BOI 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 AA4921 actually runs
Pro Flight Search has tracked every published board update for AA4921 across the BOI and MRY boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 2 completed legs so far: left a little late (~15 min) but landed about 6 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how AA4921 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: N502SY, N517SY, N509SY.
Board clocks recorded as BOI and MRY published them.
Planning around AA4921? 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: AA4921 Boise to Monterey on-time performance, measured from the BOI and MRY airport boards.
https://proflightsearch.com/flight/AA4921
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