Las Vegas, NV → Ontario, CA flight delays
LAS → ONT · all airlines · 202 flights · April 2026 · source: US BTS
This route is delayed
18%of the time, by +50 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
82%
Delayed 3h+
0.5%
Cancelled
0%
Avg when late
+50m
Best & worst day to fly
Most on-time
Saturday
delayed 10%
Worst
Friday
delayed 32%
Which airline is most punctual on LAS → ONT?
Frontierdelayed 17%
Southwestdelayed 18%
Frequently asked
How often is the Las Vegas, NV to Ontario, CA flight delayed?
About 18% of LAS → ONT flights arrive late (15+ minutes), by an average of 50 minutes when they do, based on 202 flights in April 2026.
Which airline is most punctual on LAS → ONT?
Frontier, delayed 17% of the time — the best of the 2 airlines flying this route.
What is the best day to fly LAS → ONT?
Saturday is the most on-time (delayed 10%), while Friday is the worst (delayed 32%).
Airport overviews