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AA9921 Flight Status American Airlines: Chicago to St. Louis (AAL9921)

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AA 9921 Chicago to St. Louis Flight Status

American Airlines Flight AA9921 from Chicago O'Hare International Airport ORD to St. Louis Lambert International Airport STL is not scheduled for today June 4th, 2026.
The last time the flight was scheduled was on October 24th, 2025.
Check the table below for AA9921's most recent flight history:

AA 9921 Flight Status & Schedule

Date Departure Arrival Status
Oct 24 18:54 19:41
Landed Late
 Track >
Oct 15 14:41 15:25
Landed Late
 Track >
< All ORD Departures All STL Arrivals >

American Airlines AA 9921 Chicago to St. Louis Flight Information

American Airlines Flight AA9921 connects Chicago, United States to St. Louis, United States, taking off from Chicago O'Hare International Airport ORD and landing at St. Louis Lambert International Airport STL.

How long is the AA9921 flight from Chicago to St. Louis?

The average flight time from Chicago to St. Louis is 45 minutes. The flight distance is 415 km / 258 miles and the average flight speed is 548 km/h / 341 mph.

What is the On-Time Performance (OTP) of American Airlines Flight AA9921 Chicago to St. Louis?

The Airportia On-Time Performance Rating for American Airlines Flight AA9921 is 4.5/5 stars. This metric is calculated using data from the past 10 flights.

Which terminal is the flight AA9921 arriving at?

Flight AA9921 arrives at St. Louis Lambert International Airport (STL) Terminal 1.

When was the latest AA9921 flight?

The latest flight took off on Saturday, October 25th, 2025 with the flight status being Landed on 19:41.

How else can the flight AA9921 be referenced as?

This American Airlines flight can also be referenced as AAL9921, AA 9921, AAL 9921.

How often is flight AA9921 delayed?

On average, 100% of all AA9921 flights are delayed. The average delay is 32 minutes.

Can I get compensation for my delayed or cancelled AA9921 flight or baggage issues?

If your AA9921 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.

See our AA9921 Flight Tracker above for more details.

AA9921 and Chicago ORD to St. Louis STL Flights

Other flights departing from Chicago ORD: WN4106, AA6204, UA573, OO9921

Other flights arriving at St. Louis STL: WN575, WN4421, AA6204, OO9921

All flights connecting Chicago ORD to St. Louis STL.

AA9921 American Airlines Flight: Chicago to St. Louis Route Map

Flight Delay Compensation up to 600€/$: Claim for delay, cancellation, or baggage issues >
New Flights: MS6113 J25156 A24159 RR8063 G4306 AD4248 WS9444 CP638 N9134 4D889
See Also: Flight Tracker Airports Airlines News Flights Monitor Delay Compensation
Flight-schedule data supplied by Aviation Edge Real-time Flight Schedules API.