AA2421 PhoenixPHX San FranciscoSFO · 19:11
AA2421 by American Airlines flies from Phoenix (PHX) to San Francisco (SFO) for the Wed, Sep 9 departure.
arrival expected at SFO · on schedule
board checked 4m ago · checking again in 45s
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 PHX and SFO are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, 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 →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Phoenix to San Francisco flights
same route · American AirlinesIf AA2421 is cancelled, these are the other American Airlines nonstop flights from Phoenix to San Francisco, with scheduled departure times in PHX local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How AA2421 actually runs
Pro Flight Search has tracked every published board update for AA2421 across the PHX and SFO boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: landed +0 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how AA2421 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as PHX and SFO published them.
Planning around AA2421? 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 — AA2421 Phoenix to San Francisco on-time performance, measured from the PHX and SFO airport boards.
https://proflightsearch.com/flight/AA2421
.