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PRIMARY CODE: UNIDENTIFIED AERIAL PHENOMENON
Date: 16:45 02/03/2023
Status: Closed
POD: DEN
Callsign: AAL518
Aircraft: B738
Reporting Facility: ZKC
Tail Number:
Operator: AAL
Origin: SAN
Destination: ORD
New Destination:
Operator Type: Commercial
Paged: NO
REMARKS
Aircraft reported a large balloon off the front while E bound at FL390, 35NM SE of STJ. The balloon was at approximately FL500 and above.