Flights Oakland → Ontario
OAK → ONT
Route overview
The flight route from Oakland to Ontario operates with a Boeing 737-300 and has an on-time performance rate of 76%, with an average delay of 10 minutes. Over the past year, this route has seen 351 flights, connecting passengers from Oakland International Airport, which opened in 1927, to Ontario International Airport, a busy hub serving over 5.7 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 Oakland (OAK) → Ontario (ONT) route is operated by Southwest Airlines. Across 478 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 0.21%. FlightGuard's average computed risk is 21.2/100 (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 Oakland the average ATFM delay is 1.4 minutes.
Heading to Ontario: what to expect in this direction
Flying from Oakland (OAK) to Ontario (ONT) heads south-east for about 582 km, a flight time of roughly 1h 9m.
Departures from Oakland on this leg cluster in the overnight window: about 47% of OAK-ONT flights take off then.
Air-traffic congestion: departing Oakland the average ATFM delay is 1.4 min (airspace/NAS (BTS)); arriving into Ontario it is 2.0 min (airspace/NAS (BTS)).
Across 478 tracked OAK-ONT flights, 77% left on time with an average delay of 10 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 OAK-ONT
Airports
Frequently asked questions about OAK-ONT
On the Oakland (OAK) -> Ontario (ONT) route, on-time performance is 77% with an average delay of 10 minutes, based on 478 tracked flights.
The cancellation rate on Oakland-Ontario is 0.21% across 478 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.
