Ontario, CA → Las Vegas, NV flight delays
ONT → LAS · all airlines · 202 flights · April 2026 · source: US BTS
This route is delayed
28%of the time, by +57 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
72%
Delayed 3h+
0.5%
Cancelled
0%
Avg when late
+57m
Best & worst day to fly
Most on-time
Wednesday
delayed 14%
Worst
Thursday
delayed 49%
Which airline is most punctual on ONT → LAS?
Southwestdelayed 27%
Frontierdelayed 32%
Frequently asked
How often is the Ontario, CA to Las Vegas, NV flight delayed?
About 28% of ONT → LAS flights arrive late (15+ minutes), by an average of 57 minutes when they do, based on 202 flights in April 2026.
Which airline is most punctual on ONT → LAS?
Southwest, delayed 27% of the time — the best of the 2 airlines flying this route.
What is the best day to fly ONT → LAS?
Wednesday is the most on-time (delayed 14%), while Thursday is the worst (delayed 49%).
Airport overviews