WN135Southwest Airlines · DEN → ONT
live · 44m ago
Route confirmed Southwest Airlines

WN135 DenverDEN OntarioONT

WN135 by Southwest Airlines flies from Denver (DEN) to Ontario (ONT).

Right nowNext departure tomorrow Operates daily
14:25

scheduled from DEN

The route today

live boards
DENDenverOn-time likelyDEN delay board →
ONTOntarioOn-time likelyONT delay board →
DEN→ONTevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
42%Chance of 15+ min delay
1.1%Chance of cancellation
+8 minTypical airport delay in this weather

Conditions at DEN and ONT 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 DEN

Forecast

Sat 7 Nov, local date

High17°Clikely 16°C to 19°C
Low1°Clikely 0°C to 2°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 ONT

Forecast

Sat 7 Nov, local date

High28°Clikely 27°C to 29°C
Low15°Clikely 13°C to 17°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 Denver to Ontario flights today

same route · Southwest Airlines
WN2920departs 08:00
WN3001departs 08:30
WN2263departs 08:50
WN1111departs 10:25
WN2484departs 12:45
WN2947departs 13:00

If WN135 is cancelled, these are the other Southwest Airlines nonstop flights from Denver to Ontario on the same day, with scheduled departure times in DEN 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 WN135 actually runs

Pro Flight Search has tracked every published board update for WN135 across the DEN and ONT boards: schedule changes, gate pushes and actual clocks. Combined risk score: 33.0/100. Based on airport operations, weather, and cached board history at DEN and ONT.

The verdict above is that record speaking, so it reflects how WN135 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around WN135? 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: WN135 Denver to Ontario on-time performance, measured from the DEN and ONT airport boards.

Canonical URL
https://proflightsearch.com/flight/WN135
How we measure this →