UA28United Airlines · SIN → SFO
live · 2m ago
Route confirmed United Airlines

UA28 SingaporeSIN · 22:20 San FranciscoSFO · 22:15

UA28 by United Airlines flies from Singapore (SIN) to San Francisco (SFO) for the Wed, Oct 28 departure.

Right nowScheduled · today
22:20

departs SIN · on schedule

Typical gate push+29 minmedian posted departure
Typical arrival+38 minmedian over 3 operations

Where the minutes go

last 3 operations · gate push → arrival
0+30+60+90 min
10-28
+38 arrival
10-27
+29 gate · +38 arrival
10-26
+4 gate · +9 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The route today

live boards
SINSingaporeOn-time likelySIN delay board →
SFOSan FranciscoOn-time likelySFO delay board →
SIN→SFOevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
42%Chance of 15+ min delay
1.0%Chance of cancellation
+13 minAvg hub delay right now

Driven mainly by SFO (San Francisco), currently flying VFR (visual). For this route and airline, under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

Tomorrow on this route

Forecast

Singapore to San Francisco with United Airlines · Thu 29 Oct, local date

Outlook: elevated
Chance a departure is cancelled
1.2%2.4× usual
Chance a departure leaves 60+ min late
8.0%3.1× usual

Forecast weather: 84% chance of thunder and 97% chance of rain at Singapore

Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 2 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other Singapore to San Francisco flights today

same route · United Airlines
UA2departs 08:45
UA3964departs 21:30

If UA28 is cancelled, these are the other United Airlines nonstop flights from Singapore to San Francisco on the same day, with scheduled departure times in SIN local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How UA28 actually runs

Pro Flight Search has tracked every published board update for UA28 across the SIN and SFO boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: landed +38 min. Not enough to call it.

The verdict above is that record speaking, so it reflects how UA28 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocks

Board log

scheduled → actual, per operation
10-28SIN 22:20SFO 22:15 22:53 (+38)
10-27SIN 22:20 22:49 (+29)SFO 22:15 22:53 (+38)
10-26SIN 22:20 22:24 (+4)SFO 22:15 22:24 (+9)

Board clocks recorded as SIN and SFO published them.

Planning around UA28? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — UA28 Singapore to San Francisco on-time performance, measured from the SIN and SFO airport boards.

Canonical URL
https://proflightsearch.com/flight/UA28
How we measure this →