DL4443Delta Air Lines · ONT → SLC
live · 5h ago
Route confirmed Delta Air Lines

DL4443 OntarioONT Salt Lake CitySLC

DL4443 by Delta Air Lines flies from Ontario (ONT) to Salt Lake City (SLC).

Right nowNext departure today Operates daily
17:05

scheduled from ONT

The route today

live boards
ONTOntarioModerate riskONT delay board →
SLCSalt Lake CityOn-time likelySLC delay board →
ONT→SLCevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
37%Chance of 15+ min delay
0.3%Chance of cancellation
+8 minTypical airport delay in this weather

Conditions at ONT and SLC 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 on this route

Forecast

Ontario to Salt Lake City with Delta Air Lines · Sun 1 Nov, local date

Outlook: about usual
Chance a departure leaves 60+ min late
5.3%1.6× usual

Forecast weather: 84% chance of rain at Ontario; 96% chance of rain at Salt Lake City

No cancellation outlook here: this airport's board does not publish cancellations reliably.

Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 4 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 Ontario to Salt Lake City flights today

same route · Delta Air Lines
DL2708departs 06:00
DL1416departs 09:45
DL3172departs 13:06
DL2743departs 13:35
DL3747departs 17:03

If DL4443 is cancelled, these are the other Delta Air Lines nonstop flights from Ontario to Salt Lake City on the same day, with scheduled departure times in ONT 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 DL4443 actually runs

Pro Flight Search has tracked every published board update for DL4443 across the ONT and SLC boards: schedule changes, gate pushes and actual clocks. Combined risk score: 33.0/100. Based on airport operations, weather, and cached board history at ONT and SLC.

The verdict above is that record speaking, so it reflects how DL4443 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around DL4443? 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: DL4443 Ontario to Salt Lake City on-time performance, measured from the ONT and SLC airport boards.

Canonical URL
https://proflightsearch.com/flight/DL4443
How we measure this →