UA3978 United Airlines - Flight Status
Below, you can find details about United Airlines flight UA3978, which currently operates between the airports of Singapore - Singapore Changi Airport (Airport Code SIN) and San Francisco - San Francisco International Airport (Airport Code SFO).
This flight data pertains specifically to the flight's details for Friday, January 09, 2026.
Table of contents:
Flight Status Additional Information Alternative Flights Punctuality and delays Last Past Flights UA3978
Flight Status Additional Information Alternative Flights Punctuality and delays Last Past Flights UA3978
UA3978 On Time performance:
n/a
It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions. Flight Status
UA3978 United Airlines from Singapore
Landed - On-time
Flight Status for Friday January 09, 2026
Landed - On-time
Flight Status for Friday January 09, 2026
Airline information
United Airlines
Equipment: Boeing 787-9
Departure
Singapore (SIN)
January 09, 2026
Singapore Changi Airport
Departed at:
11:59 am
Terminal:
-
Gate:
F51
Scheduled Departure Time: 12:00 pm
Arrival
San Francisco (SFO)
January 09, 2026
San Francisco International Airport
Arrived at:
10:29 am
Terminal:
IN - International
Gate:
A8
Scheduled Arrival Time: 10:53 am
Baggage: INT
Disclaimer
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Additional Information
Which is the frequency of flight UA3978?
The flight UA3978 is currently not scheduled at San Francisco Airport (SFO).
Which is the distance of flight UA3978?
The distance between the two airports is 8441 miles.
Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in Singapore: 2026-01-10 11:57:16
Current Time in San Francisco: 2026-01-09 19:57:16
The flight UA3978 is currently not scheduled at San Francisco Airport (SFO).
Which is the distance of flight UA3978?
The distance between the two airports is 8441 miles.
Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in Singapore: 2026-01-10 11:57:16
Current Time in San Francisco: 2026-01-09 19:57:16
Alternative Flights
The following airlines serves the same route between Singapore and San Francisco:
Singapore Airlines
- Flight Number: SQ32. (On Time performance: 78 - Average Delay: 9 minutes)
- Flight Number: SQ34. (On Time performance: 83 - Average Delay: 13 minutes)
United Airlines
- Flight Number: UA2. (On Time performance: 71 - Average Delay: 34 minutes)
- Flight Number: UA28. (On Time performance: 55 - Average Delay: 42 minutes)
Singapore Airlines
- Flight Number: SQ32. (On Time performance: 78 - Average Delay: 9 minutes)
- Flight Number: SQ34. (On Time performance: 83 - Average Delay: 13 minutes)
United Airlines
- Flight Number: UA2. (On Time performance: 71 - Average Delay: 34 minutes)
- Flight Number: UA28. (On Time performance: 55 - Average Delay: 42 minutes)
Punctuality and delays
It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions.
Delays analyzed by Week: It is not possible to calculate the On-Time Performance for this flight accurately by weekday due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Delays analyzed by Month: It is not possible to calculate the On-Time Performance for this flight accurately by month due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Delays analyzed by Week: It is not possible to calculate the On-Time Performance for this flight accurately by weekday due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Delays analyzed by Month: It is not possible to calculate the On-Time Performance for this flight accurately by month due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Last Past Flights UA3978
No flights for UA3978 were scheduled in the past month. The last flight took place on Friday, January 09, 2026