UA559United Airlines · ORD → SAN
live · 8m ago
Route confirmed United Airlines

UA559 ChicagoORD San DiegoSAN

UA559 by United Airlines flies from Chicago (ORD) to San Diego (SAN).

Right nowNext departure tomorrow Operates daily
09:25

scheduled from ORD

The route today

live boards
ORDChicagoOn-time likelyORD delay board →
SANSan DiegoOn-time likelySAN delay board →
ORD→SANevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
52%Chance of 15+ min delay
1.5%Chance of cancellation
+16 minTypical airport delay in this weather

Conditions at ORD and SAN are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records 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 at ORD

Forecast

Mon 9 Nov, local date

High15°Clikely 12°C to 18°C
Low3°Clikely 1°C to 5°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at SAN

Forecast

Mon 9 Nov, local date

High27°Clikely 25°C to 29°C
Low17°Clikely 16°C to 18°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · 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 Chicago to San Diego flights today

same route · United Airlines
UA2428departs 07:00
UA660departs 08:50
UA2384departs 12:40
UA2138departs 16:00
UA8110departs 16:00
UA8142departs 18:15

If UA559 is cancelled, these are the other United Airlines nonstop flights from Chicago to San Diego on the same day, with scheduled departure times in ORD local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How UA559 actually runs

Pro Flight Search has tracked every published board update for UA559 across the ORD and SAN boards: schedule changes, gate pushes and actual clocks. Combined risk score: 1.5/100. Based on airport operations, weather, and cached board history at ORD and SAN.

The verdict above is that record speaking, so it reflects how UA559 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around UA559? 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: UA559 Chicago to San Diego on-time performance, measured from the ORD and SAN airport boards.

Canonical URL
https://proflightsearch.com/flight/UA559
How we measure this →