Flights Las Vegas → Ontario
LAS → ONT
Route overview
The flight route from Las Vegas to Ontario has a punctuality rate of 75%, with an average delay of 11.1 minutes per flight. Over the course of a year, this route sees 591 flights, serving the busy Ontario airport which handles nearly 5.74 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 Las Vegas (LAS) → Ontario (ONT) route is operated by Southwest Airlines. Across 788 flights monitored in recent months, 77% arrived on time (within 15 min of schedule), with an average delay of 10 minutes. The cancellation rate is 0.00%. FlightGuard's average computed risk is 23.2/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Ontario the average ATFM delay is 2.0 minutes (main cause: airspace/NAS (BTS)). Departing from Las Vegas the average ATFM delay is 2.0 minutes.
Heading to Ontario: what to expect in this direction
Flying from Las Vegas (LAS) to Ontario (ONT) heads south-west for about 317 km, a flight time of roughly 49m.
Departures from Las Vegas on this leg cluster in the overnight window: about 46% of LAS-ONT flights take off then.
Air-traffic congestion: departing Las Vegas the average ATFM delay is 2.0 min (atfm); arriving into Ontario it is 2.0 min (airspace/NAS (BTS)).
Across 788 tracked LAS-ONT flights, 77% left on time with an average delay of 10 min and a 0.0% 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 LAS-ONT
Airports
Frequently asked questions about LAS-ONT
On the Las Vegas (LAS) -> Ontario (ONT) route, on-time performance is 77% with an average delay of 10 minutes, based on 788 tracked flights.
The cancellation rate on Las Vegas-Ontario is 0.00% 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 Ontario, 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.
