Route
OAK → ONT
Oakland San Francisco Bay Airport Ontario International Airport
Alerts at OAK and ONT
How punctual is this route?
- On-time arrivals
- 80.2%
- Less than 15 minutes late
- Cancelled
- 0.5%
- Of scheduled flights
- Average delay when late
- 53 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,458
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 61%
- Airline (crew, maintenance, cleaning) 36%
- Air traffic control & airport 4%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 87.2% | 133 |
| October 2025 | 81.6% | 136 |
| November 2025 | 84.0% | 130 |
| December 2025 | 77.7% | 121 |
| January 2026 | 94.1% | 120 |
| February 2026 | 88.7% | 115 |
| March 2026 | 78.3% | 121 |
| April 2026 | 74.8% | 115 |
| May 2026 | 74.4% | 117 |
| June 2026 | 74.1% | 112 |
| July 2026 | 76.7% | 116 |
| August 2026 | 69.4% | 122 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 1,458 | 80.2% | 0.5% | 53 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN3062
3% late · 60 flights
-
WN940
9% late · 58 flights
-
WN516
4% late · 57 flights
-
WN540
42% late · 57 flights
-
WN2349
8% late · 53 flights
-
WN4421
2% late · 52 flights
-
WN1087
43% late · 49 flights
-
WN2442
2% late · 47 flights
-
WN1386
16% late · 44 flights
-
WN980
12% late · 42 flights
-
WN1700
13% late · 41 flights
-
WN1363
19% late · 31 flights
-
WN3230
19% late · 31 flights
-
WN101
13% late · 30 flights
-
WN3244
3% late · 30 flights
-
WN1371
11% late · 28 flights
-
WN2835
52% late · 28 flights
-
WN271
41% late · 27 flights
-
WN381
33% late · 27 flights
-
WN556
12% late · 26 flights
-
WN1690
32% late · 25 flights
-
WN2084
8% late · 25 flights
-
WN3588
8% late · 25 flights
-
WN1966
21% late · 24 flights
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