UA3931United Airlines · ORD → LAX
live · 29m ago
Route confirmed United Airlines

UA3931 ChicagoORD · 21:35 Los AngelesLAX · 00:05

UA3931 by United Airlines flies from Chicago (ORD) to Los Angeles (LAX).

Same number through ORD → SFO → LAX

Right nowNext departure tomorrow Operates daily
06:00

scheduled from ORD

Typical gate push−4 minmedian posted departure

The route today

live boards
ORDChicagoOn-time likelyORD delay board →
LAXLos AngelesOn-time likelyLAX delay board →
ORD→LAXevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
56%Chance of 15+ min delay
1.4%Chance of cancellation
+21 minAvg hub delay right now

Conditions at ORD and LAX 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 Chicago to Los Angeles flights today

same route · United Airlines
UA2374departs 05:00
UA246departs 06:00
UA1116departs 07:40
UA342departs 08:40
UA543departs 10:40
UA1097departs 12:51

If UA3931 is cancelled, these are the other United Airlines nonstop flights from Chicago to Los Angeles on the same day, with scheduled departure times in ORD local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How UA3931 actually runs

Pro Flight Search has tracked every published board update for UA3931 across the ORD and LAX boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 1 completed leg so far: landed +5 min. Not enough to call it.

The verdict above is that record speaking, so it reflects how UA3931 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
09-14ORD 21:35 21:31 (−4)LAX

Board clocks recorded as ORD and LAX published them.

Planning around UA3931? 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 — UA3931 Chicago to Los Angeles on-time performance, measured from the ORD and LAX airport boards.

Canonical URL
https://proflightsearch.com/flight/UA3931
How we measure this →