Flights Ontario → Las Vegas
ONT → LAS
Route overview
The flight route from Ontario to Las Vegas operates with a Boeing 737-800 aircraft and has an on-time performance rate of 78%, with an average delay of 9.8 minutes per flight. Over the course of a year, this route sees 591 flights, serving one of the world's busiest airports in Las Vegas, which handles nearly 52.7 million passengers annually.
Your rights on this US flight (DOT)
US flights have no statutory cash compensation for delays. Under the US DOT rules, if your flight is cancelled or significantly changed and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Amenities for controllable delays depend on each airline's contract of carriage.
US flight refund rules & checker →General information, not legal advice.
The Ontario (ONT) → Las Vegas (LAS) route is operated by Southwest Airlines. Across 788 flights monitored in recent months, 80% arrived on time (within 15 min of schedule), with an average delay of 11 minutes. The cancellation rate is 0.25%. FlightGuard's average computed risk is 28.8/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Las Vegas the average ATFM delay is 2.0 minutes (main cause: atfm). Departing from Ontario the average ATFM delay is 2.0 minutes.
Heading to Las Vegas: what to expect in this direction
Flying from Ontario (ONT) to Las Vegas (LAS) heads north-east for about 317 km, a flight time of roughly 49m.
Departures from Ontario on this leg cluster in the morning window: about 35% of ONT-LAS flights take off then.
Air-traffic congestion: departing Ontario the average ATFM delay is 2.0 min (airspace/NAS (BTS)); arriving into Las Vegas it is 2.0 min (atfm).
Across 788 tracked ONT-LAS flights, 80% left on time with an average delay of 11 min and a 0.3% cancellation rate.
Route facts
Flights on this route
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| Southwest Airlines (WN) | 73% | 6 min | 3.1% |
Airlines operating ONT-LAS
Airports
Frequently asked questions about ONT-LAS
On the Ontario (ONT) -> Las Vegas (LAS) route, on-time performance is 80% with an average delay of 11 minutes, based on 788 tracked flights.
The cancellation rate on Ontario-Las Vegas is 0.25% across 788 monitored flights.
The route is operated by 1 airline: Southwest Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at Las Vegas, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
US flights have no statutory cash compensation for delays. Under US DOT rules, if the airline cancels or significantly changes your flight and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Meals or hotels for controllable delays depend on each airline's contract of carriage.
