UA400United Airlines · SFO → AUS
live · 27m ago
Route confirmed United Airlines

UA400 San FranciscoSFO · 23:59 AustinAUS · 05:46

UA400 by United Airlines flies from San Francisco (SFO) to Austin (AUS) for the Thu, Oct 22 departure.

Right nowOn Time · gate E13 · as of 22:34
00:09

departs SFO · 10 min late

Typical gate push−9 minmedian posted departure
Typical arrival−38 minmedian over 2 operations
Wins back in air~29 minmedian gate push vs arrival · how planes make up time →

The route today

live boards
SFOSan FranciscoModerate riskSFO delay board →
AUSAustinOn-time likelyAUS delay board →
SFO→AUSevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
46%Chance of 15+ min delay
1.3%Chance of cancellation
+15 minAvg hub delay right now

Conditions at SFO and AUS are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. 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 →

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 San Francisco to Austin flights today

same route · United Airlines
UA1107departs 08:30
UA2432departs 10:50
UA8220departs 10:50
UA8232departs 10:50
UA1116departs 12:45
UA2150departs 16:19

If UA400 is cancelled, these are the other United Airlines nonstop flights from San Francisco to Austin on the same day, with scheduled departure times in SFO local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How UA400 actually runs

Pro Flight Search has tracked every published board update for UA400 across the SFO and AUS boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: left about 9 min early but landed about 38 min early. Not enough to call it.

The verdict above is that record speaking, so it reflects how UA400 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
10-21SFO 23:59 23:50 (−9)AUS 05:46 05:08 (−38)
10-20SFO AUS 05:46 05:02 (−44)

Aircraft

Recent tails: N436UA, N490UA.

Board clocks recorded as SFO and AUS published them.

Planning around UA400? 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 — UA400 San Francisco to Austin on-time performance, measured from the SFO and AUS airport boards.

Canonical URL
https://proflightsearch.com/flight/UA400
How we measure this →