Aviation Data
EN
EnglishTiếng Việt

582 km · Domestic

Oakland San Francisco Bay (OAK) – Ontario (ONT)

In July 2026, 232 flights operated between Oakland San Francisco Bay and Ontario (both directions), and 78.9% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January2372370.0%
February232229▼ 1.3%
March272241▼ 11.4%
April262231▼ 11.8%
May289235▼ 18.7%
June270223▼ 17.4%
July269232▼ 13.8%
August270––
September266––
October272–in progress
November252––
December242––
Year to date (Jan–Jul)1,8311,628▼ 11.1%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January88.6%89.5%▲ 1.0%
February90.1%84.7%▼ 6.0%
March87.1%81.7%▼ 6.2%
April85.1%73.6%▼ 13.5%
May85.5%74.0%▼ 13.5%
June80.4%67.7%▼ 15.8%
July84.8%78.9%▼ 7.0%
August83.3%––
September84.6%––
October74.3%–in progress
November81.7%––
December73.6%––
Year-to-date average (Jan–Jul)85.9%78.6%▼ 8.6%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January330.0%
February01–
March01–
April00–
May40▼ 100.0%
June00–
July00–
August0––
September0––
October0–in progress
November7––
December0––
Year to date (Jan–Jul)75▼ 28.6%

By direction

OAK → ONT

Scheduled flights
2,732
Flights operated
2,721
Cancelled
11 · 0.4%
On-time departures
80.8%

ONT → OAK

Scheduled flights
2,730
Flights operated
2,720
Cancelled
10 · 0.4%
On-time departures
83.2%

OAK → ONT and ONT → OAK counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 5,462 100.0% 82.0% 21

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay06:00–07:00-2.3min · 868 recorded · 866 measured
Gap to highest-delay hour21.2min06:00 ↔ 20:00
Recorded flights5,462OAK–ONT

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · Fewer than 200 measured departures · 136 recorded · 136 measured · Source: the US BTS 06:00 · 96.4% · 868 recorded · 866 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 176 recorded · 175 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 114 recorded · 114 measured · Source: the US BTS 09:00 · 93.1% · 293 recorded · 291 measured · Source: the US BTS 10:00 · 87.7% · 439 recorded · 439 measured · Source: the US BTS 11:00 · 88.7% · 382 recorded · 381 measured · Source: the US BTS 12:00 · 81.7% · 214 recorded · 213 measured · Source: the US BTS 13:00 · 75.8% · 234 recorded · 231 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 175 recorded · 173 measured · Source: the US BTS 15:00 · 72.8% · 383 recorded · 382 measured · Source: the US BTS 16:00 · 74.6% · 340 recorded · 338 measured · Source: the US BTS 17:00 · 70.6% · 309 recorded · 306 measured · Source: the US BTS 18:00 · 79.2% · 524 recorded · 523 measured · Source: the US BTS 19:00 · 64.3% · 268 recorded · 266 measured · Source: the US BTS 20:00 · 65.7% · 452 recorded · 452 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 146 recorded · 146 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 9 recorded · 9 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · Fewer than 200 measured departures · 136 recorded · 136 measured · Source: the US BTS 06:00 · -2.3 min · 868 recorded · 866 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 176 recorded · 175 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 114 recorded · 114 measured · Source: the US BTS 09:00 · 0.9 min · 293 recorded · 291 measured · Source: the US BTS 10:00 · 3.3 min · 439 recorded · 439 measured · Source: the US BTS 11:00 · 4.3 min · 382 recorded · 381 measured · Source: the US BTS 12:00 · 8.3 min · 214 recorded · 213 measured · Source: the US BTS 13:00 · 11.1 min · 234 recorded · 231 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 175 recorded · 173 measured · Source: the US BTS 15:00 · 11.9 min · 383 recorded · 382 measured · Source: the US BTS 16:00 · 10.7 min · 340 recorded · 338 measured · Source: the US BTS 17:00 · 13.2 min · 309 recorded · 306 measured · Source: the US BTS 18:00 · 9.7 min · 524 recorded · 523 measured · Source: the US BTS 19:00 · 18.6 min · 268 recorded · 266 measured · Source: the US BTS 20:00 · 18.9 min · 452 recorded · 452 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 146 recorded · 146 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 9 recorded · 9 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · 136 · 136 recorded · 136 measured · Source: the US BTS 06:00 · 868 · 868 recorded · 866 measured · Source: the US BTS 07:00 · 176 · 176 recorded · 175 measured · Source: the US BTS 08:00 · 114 · 114 recorded · 114 measured · Source: the US BTS 09:00 · 293 · 293 recorded · 291 measured · Source: the US BTS 10:00 · 439 · 439 recorded · 439 measured · Source: the US BTS 11:00 · 382 · 382 recorded · 381 measured · Source: the US BTS 12:00 · 214 · 214 recorded · 213 measured · Source: the US BTS 13:00 · 234 · 234 recorded · 231 measured · Source: the US BTS 14:00 · 175 · 175 recorded · 173 measured · Source: the US BTS 15:00 · 383 · 383 recorded · 382 measured · Source: the US BTS 16:00 · 340 · 340 recorded · 338 measured · Source: the US BTS 17:00 · 309 · 309 recorded · 306 measured · Source: the US BTS 18:00 · 524 · 524 recorded · 523 measured · Source: the US BTS 19:00 · 268 · 268 recorded · 266 measured · Source: the US BTS 20:00 · 452 · 452 recorded · 452 measured · Source: the US BTS 21:00 · 146 · 146 recorded · 146 measured · Source: the US BTS 22:00 · 9 · 9 recorded · 9 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00Fewer than 200 measured departures—136136
06:0096.4%-2.3 min866868
07:00Fewer than 200 measured departures—175176
08:00Fewer than 200 measured departures—114114
09:0093.1%0.9 min291293
10:0087.7%3.3 min439439
11:0088.7%4.3 min381382
12:0081.7%8.3 min213214
13:0075.8%11.1 min231234
14:00Fewer than 200 measured departures—173175
15:0072.8%11.9 min382383
16:0074.6%10.7 min338340
17:0070.6%13.2 min306309
18:0079.2%9.7 min523524
19:0064.3%18.6 min266268
20:0065.7%18.9 min452452
21:00Fewer than 200 measured departures—146146
22:00Fewer than 200 measured departures—99
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 82.8% · 849 recorded · 848 measured · Source: the US BTS Tuesday · 86.6% · 747 recorded · 746 measured · Source: the US BTS Wednesday · 85.5% · 741 recorded · 739 measured · Source: the US BTS Thursday · 79.6% · 845 recorded · 841 measured · Source: the US BTS Friday · 78.2% · 862 recorded · 853 measured · Source: the US BTS Saturday · 86.9% · 566 recorded · 565 measured · Source: the US BTS Sunday · 77.0% · 852 recorded · 849 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 6.4 min · 849 recorded · 848 measured · Source: the US BTS Tuesday · 3.3 min · 747 recorded · 746 measured · Source: the US BTS Wednesday · 5.5 min · 741 recorded · 739 measured · Source: the US BTS Thursday · 8.4 min · 845 recorded · 841 measured · Source: the US BTS Friday · 10.3 min · 862 recorded · 853 measured · Source: the US BTS Saturday · 3.3 min · 566 recorded · 565 measured · Source: the US BTS Sunday · 11.7 min · 852 recorded · 849 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 849 · 849 recorded · 848 measured · Source: the US BTS Tuesday · 747 · 747 recorded · 746 measured · Source: the US BTS Wednesday · 741 · 741 recorded · 739 measured · Source: the US BTS Thursday · 845 · 845 recorded · 841 measured · Source: the US BTS Friday · 862 · 862 recorded · 853 measured · Source: the US BTS Saturday · 566 · 566 recorded · 565 measured · Source: the US BTS Sunday · 852 · 852 recorded · 849 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday82.8%6.4 min848849
Tuesday86.6%3.3 min746747
Wednesday85.5%5.5 min739741
Thursday79.6%8.4 min841845
Friday78.2%10.3 min853862
Saturday86.9%3.3 min565566
Sunday77.0%11.7 min849852

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · 89.0% · 480 recorded · 474 measured · Source: the US BTS Feb · 87.4% · 462 recorded · 461 measured · Source: the US BTS Mar · 84.6% · 514 recorded · 513 measured · Source: the US BTS Apr · 79.7% · 493 recorded · 493 measured · Source: the US BTS May · 80.3% · 528 recorded · 524 measured · Source: the US BTS Jun · 74.7% · 493 recorded · 493 measured · Source: the US BTS Jul · 82.0% · 501 recorded · 501 measured · Source: the US BTS Aug · 83.3% · 270 recorded · 270 measured · Source: the US BTS Sep · 84.6% · 266 recorded · 266 measured · Source: the US BTS Oct · 79.7% · 444 recorded · 444 measured · Source: the US BTS Nov · 84.7% · 518 recorded · 509 measured · Source: the US BTS Dec · 75.9% · 493 recorded · 493 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 2.0 min · 480 recorded · 474 measured · Source: the US BTS Feb · 2.9 min · 462 recorded · 461 measured · Source: the US BTS Mar · 5.1 min · 514 recorded · 513 measured · Source: the US BTS Apr · 8.2 min · 493 recorded · 493 measured · Source: the US BTS May · 9.4 min · 528 recorded · 524 measured · Source: the US BTS Jun · 11.2 min · 493 recorded · 493 measured · Source: the US BTS Jul · 9.7 min · 501 recorded · 501 measured · Source: the US BTS Aug · 6.4 min · 270 recorded · 270 measured · Source: the US BTS Sep · 7.2 min · 266 recorded · 266 measured · Source: the US BTS Oct · 8.6 min · 444 recorded · 444 measured · Source: the US BTS Nov · 5.7 min · 518 recorded · 509 measured · Source: the US BTS Dec · 10.1 min · 493 recorded · 493 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 480 · 480 recorded · 474 measured · Source: the US BTS Feb · 462 · 462 recorded · 461 measured · Source: the US BTS Mar · 514 · 514 recorded · 513 measured · Source: the US BTS Apr · 493 · 493 recorded · 493 measured · Source: the US BTS May · 528 · 528 recorded · 524 measured · Source: the US BTS Jun · 493 · 493 recorded · 493 measured · Source: the US BTS Jul · 501 · 501 recorded · 501 measured · Source: the US BTS Aug · 270 · 270 recorded · 270 measured · Source: the US BTS Sep · 266 · 266 recorded · 266 measured · Source: the US BTS Oct · 444 · 444 recorded · 444 measured · Source: the US BTS Nov · 518 · 518 recorded · 509 measured · Source: the US BTS Dec · 493 · 493 recorded · 493 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan89.0%2.0 min474480
Feb87.4%2.9 min461462
Mar84.6%5.1 min513514
Apr79.7%8.2 min493493
May80.3%9.4 min524528
Jun74.7%11.2 min493493
Jul82.0%9.7 min501501
Aug83.3%6.4 min270270
Sep84.6%7.2 min266266
Oct79.7%8.6 min444444
Nov84.7%5.7 min509518
Dec75.9%10.1 min493493

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 81.7% 4,461
  • Delayed >15 min 17.9% 980
  • Cancelled 0.4% 21
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

74
74 of 74
Flight numbersBy direction DeparturesOn time
WN393 ONT → OAK 120 95.8%
WN1884 OAK → ONT 118 80.3%
WN2317 ONT → OAK 89 87.5%
WN268 ONT → OAK 89 83.2%
WN1358 OAK → ONT 80 98.7%
WN1916 OAK → ONT 75 90.7%
WN1067 OAK → ONT 74 83.6%
WN3662 ONT → OAK 71 73.2%
WN3287 OAK → ONT 61 73.8%
WN4575 OAK → ONT 60 83.3%
WN735 ONT → OAK 60 70.0%
WN2567 OAK → ONT 59 96.6%
WN1003 ONT → OAK 58 87.5%
WN2424 ONT → OAK 58 89.7%
WN3230 OAK → ONT 58 72.4%
WN3644 ONT → OAK 58 75.9%
WN3868 ONT → OAK 58 84.5%
WN940 OAK → ONT 58 86.2%
WN1363 OAK → ONT 57 73.7%
WN3062 OAK → ONT 57 91.2%
WN3155 ONT → OAK 57 73.7%
WN3659 ONT → OAK 57 89.5%
WN516 OAK → ONT 57 93.0%
WN540 OAK → ONT 57 54.4%
WN678 ONT → OAK 57 87.7%
WN699 OAK → ONT 57 94.7%
WN3985 ONT → OAK 56 78.6%
WN2349 OAK → ONT 53 90.6%
WN3749 OAK → ONT 52 63.5%
WN4138 ONT → OAK 52 94.2%
WN4139 ONT → OAK 52 88.5%
WN1690 ONT → OAK 51 90.2%
WN2986 ONT → OAK 50 90.0%
WN4331 ONT → OAK 50 96.0%
WN4421 OAK → ONT 50 96.0%
WN1087 OAK → ONT 49 57.1%
WN3082 ONT → OAK 49 59.2%
WN4383 OAK → ONT 49 65.3%
WN4421 ONT → OAK 49 87.8%
WN658 ONT → OAK 49 79.6%
WN1992 ONT → OAK 47 97.9%
WN2442 OAK → ONT 47 97.8%
WN1386 OAK → ONT 44 84.1%
WN2572 ONT → OAK 44 84.1%
WN117 ONT → OAK 42 92.9%
WN2011 ONT → OAK 42 58.5%
WN2757 ONT → OAK 42 78.1%
WN3022 OAK → ONT 42 71.4%
WN3064 OAK → ONT 42 87.8%
WN3154 ONT → OAK 42 88.1%
WN3661 ONT → OAK 42 57.1%
WN779 ONT → OAK 42 95.2%
WN980 OAK → ONT 42 87.8%
WN1700 OAK → ONT 41 90.0%
WN1575 ONT → OAK 40 87.5%
WN1582 OAK → ONT 40 77.5%
WN2788 ONT → OAK 40 100.0%
WN653 OAK → ONT 40 92.5%
WN3864 OAK → ONT 39 97.4%
WN488 OAK → ONT 39 92.3%
WN671 ONT → OAK 39 92.3%
WN3986 ONT → OAK 35 48.5%
WN4140 ONT → OAK 35 68.6%
WN2225 OAK → ONT 33 72.7%
WN2979 OAK → ONT 33 75.8%
WN4135 ONT → OAK 33 100.0%
WN4136 ONT → OAK 33 90.9%
WN726 OAK → ONT 33 97.0%
WN784 ONT → OAK 33 97.0%
WN2331 OAK → ONT 32 100.0%
WN4012 ONT → OAK 31 71.0%
WN101 OAK → ONT 30 83.3%
WN2563 ONT → OAK 30 100.0%
WN3244 OAK → ONT 30 96.7%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 232 −13.8% 0 78.9%
June 2026 223 −17.4% 0 67.7%
May 2026 235 −18.7% 0 74.0%
April 2026 231 −11.8% 0 73.6%
March 2026 241 −11.4% 1 81.7%
February 2026 229 −1.3% 1 84.7%
January 2026 237 +0.0% 3 89.5%
December 2025 242 −3.6% 0 73.6%
November 2025 252 −1.9% 7 81.7%
October 2025 272 +58.1% 0 74.3%
September 2025 266 0 84.6%
August 2025 270 0 83.3%
July 2025 269 0 84.8%
June 2025 270 0 80.4%
May 2025 289 4 85.5%
April 2025 262 0 85.1%
March 2025 272 0 87.1%
February 2025 232 0 90.1%
January 2025 237 3 88.6%
December 2024 251 0 78.1%
November 2024 257 2 87.5%
October 2024 172 0 88.4%

How to read this chart

Loading the guide…