Flights Ontario → Oakland
ONT → OAK
Route overview
The flight route from Ontario to Oakland is served by Boeing 737-300 aircraft and has an on-time performance rate of 84%, with an average delay of 4.3 minutes per flight. Over the past year, this route has seen a total of 352 flights, connecting passengers between Ontario and Oakland, where the destination airport, which opened in 1927, handles over eleven 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) → Oakland (OAK) route is operated by Southwest Airlines. Across 487 flights monitored in recent months, 86% arrived on time (within 15 min of schedule), with an average delay of 4 minutes. The cancellation rate is 0.21%. FlightGuard's average computed risk is 20/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Oakland the average ATFM delay is 1.4 minutes (main cause: airspace/NAS (BTS)). Departing from Ontario the average ATFM delay is 2.0 minutes.
Heading to Oakland: what to expect in this direction
Flying from Ontario (ONT) to Oakland (OAK) heads north-west for about 582 km, a flight time of roughly 1h 9m.
Departures from Ontario on this leg cluster in the overnight window: about 46% of ONT-OAK flights take off then.
Air-traffic congestion: departing Ontario the average ATFM delay is 2.0 min (airspace/NAS (BTS)); arriving into Oakland it is 1.4 min (airspace/NAS (BTS)).
Across 487 tracked ONT-OAK flights, 86% left on time with an average delay of 4 min and a 0.2% 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-OAK
Airports
Frequently asked questions about ONT-OAK
On the Ontario (ONT) -> Oakland (OAK) route, on-time performance is 86% with an average delay of 4 minutes, based on 487 tracked flights.
The cancellation rate on Ontario-Oakland is 0.21% across 487 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 Oakland, 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.
