United Airlines
UA3964 Flight Status
According to real-time data from Trip.com, flight UA3964, operated by United Airlines and scheduled to fly from Singapore (SIN to San Francisco (SFO), has been cancelled. Please contact the airline or airport counter for the latest information.
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Canceled
Please refer to the airline for the latest information
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Flight.News
A Heat Advisory remains in effect for San Francisco and surrounding areas until 10 PM PDT Thursday. Hot conditions will bring maximum temperatures in the mid-90s to near 105, with mild overnight temperatures limiting relief. The heat poses risks to anyone without effective cooling or adequate hydration, with impacts likely on health systems, heat-sensitive industries, and infrastructure.
UA3964 Aircraft Details
Plane model info unavailable
Punctuality (Departure)
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Punctuality (Arrival)
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Early on average
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Seat layout example
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Frequently Asked Questions
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What is the current status of flight ua3964?
Flight ua3964 has been canceled (status: Canceled). Contact United Airlines or your booking channel for rebooking or refund (updated Oct 8, 2026). -
Is flight ua3964 on time today?
Flight ua3964 has been canceled (status: Canceled). Contact United Airlines or your booking channel for rebooking or refund options; if booked on Trip.com, use Manage Booking. -
What route does flight ua3964 fly?
Flight ua3964 is operated by United Airlines from Singapore (SIN) to San Francisco (SFO). Typical flight time is about 15 hours40 minutes; operating days may include Thursday. -
How can I check real-time status for flight ua3964?
Track flight ua3964 on this Trip.com status page for live departure, arrival, gate and baggage updates. For push alerts on the go, open the same flight in the Trip.com App and turn on flight notifications. -
If flight ua3964 is delayed or canceled, what should I do?
If ua3964 is delayed or canceled, first confirm the latest status here (Canceled, updated Oct 8, 2026). Contact United Airlines or your booking channel for rebooking or refund options, and check Trip.com Manage Booking if you booked on Trip.com. -
Has flight ua3964 departed from Singapore?
Flight ua3964 has been canceled and did not depart from Singapore (SIN). Contact United Airlines or your booking channel for next steps.
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