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| Date: | Tuesday 2 September 2025 |
| Time: | 16:15 UTC |
| Type: |  Boeing 737 MAX 9 |
| Owner/operator: | United Airlines |
| Registration: | N37527 |
| MSN: | 43463/7744 |
| Year of manufacture: | 2019 |
| Fatalities: | Fatalities: 0 / Occupants: 172 |
| Other fatalities: | 0 |
| Aircraft damage: | None |
| Location: | NE of San Francisco, CA -
 United States of America
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | San Francisco International Airport, CA (SFO/KSFO) |
| Baltimore/Washington International Thurgood Marshall Airport, MD (BWI/KBWI) | |
| Confidence Rating: |  Information is only available from news, social media or unofficial sources |
United Airlines flight UA2664, a Boeing 737 MAX 9, returned to the departure airport, San Francisco International Airport, CA (SFO), after reporting a "plastic burning smell" in the cabin.
The flight landed back at SFO, 55 minutes after takeoff.
Sources:
https://www.nbcbayarea.com/news/local/united-plane-plastic-burning-smell-cabin/3942116/
https://www.flightradar24.com/data/flights/ua2664#3c05bd05
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 03-Sep-2025 17:35 | ASN | Added |
| 03-Sep-2025 17:36 | ASN | Updated [Narrative, ] |
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