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536 km · Domestic

Ontario (ONT) – Mineta San Jose (SJC)

In July 2026, 237 flights operated between Ontario and Mineta San Jose (both directions), and 71.3% 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
January199202▲ 1.5%
February190198▲ 4.2%
March213214▲ 0.5%
April228212▼ 7.0%
May246220▼ 10.6%
June230227▼ 1.3%
July236237▲ 0.4%
August220––
September214––
October220–in progress
November234––
December235––
Year to date (Jan–Jul)1,5421,510▼ 2.1%

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
January88.4%88.6%▲ 0.2%
February87.9%86.4%▼ 1.7%
March86.4%81.8%▼ 5.3%
April86.0%80.2%▼ 6.7%
May82.5%79.1%▼ 4.1%
June76.5%67.8%▼ 11.4%
July74.6%71.3%▼ 4.4%
August80.9%––
September79.9%––
October70.9%–in progress
November84.2%––
December83.4%––
Year-to-date average (Jan–Jul)83.2%79.3%▼ 4.7%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January40▼ 100.0%
February00–
March00–
April00–
May00–
June01–
July01–
August0––
September0––
October0–in progress
November0––
December1––
Year to date (Jan–Jul)42▼ 50.0%

By direction

ONT → SJC

Scheduled flights
2,391
Flights operated
2,389
Cancelled
2 · 0.1%
On-time departures
81.6%

SJC → ONT

Scheduled flights
2,382
Flights operated
2,377
Cancelled
5 · 0.2%
On-time departures
81.2%

ONT → SJC and SJC → ONT counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 4,773 100.0% 81.4% 7

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 delay08:00–09:00-3.5min · 276 recorded · 273 measured
Gap to highest-delay hour23.3min08:00 ↔ 20:00
Recorded flights4,773ONT–SJC

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 · 56 recorded · 56 measured · Source: the US BTS 06:00 · 98.0% · 636 recorded · 634 measured · Source: the US BTS 07:00 · 96.8% · 286 recorded · 285 measured · Source: the US BTS 08:00 · 97.1% · 276 recorded · 273 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 139 recorded · 139 measured · Source: the US BTS 10:00 · 87.8% · 353 recorded · 352 measured · Source: the US BTS 11:00 · 87.1% · 379 recorded · 379 measured · Source: the US BTS 12:00 · 87.6% · 234 recorded · 234 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 157 recorded · 157 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 193 recorded · 193 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 180 recorded · 180 measured · Source: the US BTS 16:00 · 67.9% · 367 recorded · 367 measured · Source: the US BTS 17:00 · 68.0% · 347 recorded · 347 measured · Source: the US BTS 18:00 · 75.0% · 232 recorded · 232 measured · Source: the US BTS 19:00 · 70.9% · 398 recorded · 398 measured · Source: the US BTS 20:00 · 64.0% · 433 recorded · 433 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 106 recorded · 106 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 1 recorded · 1 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 · 56 recorded · 56 measured · Source: the US BTS 06:00 · -3.1 min · 636 recorded · 634 measured · Source: the US BTS 07:00 · -3.2 min · 286 recorded · 285 measured · Source: the US BTS 08:00 · -3.5 min · 276 recorded · 273 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 139 recorded · 139 measured · Source: the US BTS 10:00 · 3.4 min · 353 recorded · 352 measured · Source: the US BTS 11:00 · 5.6 min · 379 recorded · 379 measured · Source: the US BTS 12:00 · 3.3 min · 234 recorded · 234 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 157 recorded · 157 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 193 recorded · 193 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 180 recorded · 180 measured · Source: the US BTS 16:00 · 16.8 min · 367 recorded · 367 measured · Source: the US BTS 17:00 · 15.9 min · 347 recorded · 347 measured · Source: the US BTS 18:00 · 9.0 min · 232 recorded · 232 measured · Source: the US BTS 19:00 · 14.5 min · 398 recorded · 398 measured · Source: the US BTS 20:00 · 19.8 min · 433 recorded · 433 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 106 recorded · 106 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 1 recorded · 1 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 · 56 · 56 recorded · 56 measured · Source: the US BTS 06:00 · 636 · 636 recorded · 634 measured · Source: the US BTS 07:00 · 286 · 286 recorded · 285 measured · Source: the US BTS 08:00 · 276 · 276 recorded · 273 measured · Source: the US BTS 09:00 · 139 · 139 recorded · 139 measured · Source: the US BTS 10:00 · 353 · 353 recorded · 352 measured · Source: the US BTS 11:00 · 379 · 379 recorded · 379 measured · Source: the US BTS 12:00 · 234 · 234 recorded · 234 measured · Source: the US BTS 13:00 · 157 · 157 recorded · 157 measured · Source: the US BTS 14:00 · 193 · 193 recorded · 193 measured · Source: the US BTS 15:00 · 180 · 180 recorded · 180 measured · Source: the US BTS 16:00 · 367 · 367 recorded · 367 measured · Source: the US BTS 17:00 · 347 · 347 recorded · 347 measured · Source: the US BTS 18:00 · 232 · 232 recorded · 232 measured · Source: the US BTS 19:00 · 398 · 398 recorded · 398 measured · Source: the US BTS 20:00 · 433 · 433 recorded · 433 measured · Source: the US BTS 21:00 · 106 · 106 recorded · 106 measured · Source: the US BTS 22:00 · 1 · 1 recorded · 1 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—5656
06:0098.0%-3.1 min634636
07:0096.8%-3.2 min285286
08:0097.1%-3.5 min273276
09:00Fewer than 200 measured departures—139139
10:0087.8%3.4 min352353
11:0087.1%5.6 min379379
12:0087.6%3.3 min234234
13:00Fewer than 200 measured departures—157157
14:00Fewer than 200 measured departures—193193
15:00Fewer than 200 measured departures—180180
16:0067.9%16.8 min367367
17:0068.0%15.9 min347347
18:0075.0%9.0 min232232
19:0070.9%14.5 min398398
20:0064.0%19.8 min433433
21:00Fewer than 200 measured departures—106106
22:00Fewer than 200 measured departures—11
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 80.4% · 755 recorded · 754 measured · Source: the US BTS Tuesday · 87.2% · 618 recorded · 617 measured · Source: the US BTS Wednesday · 87.1% · 613 recorded · 611 measured · Source: the US BTS Thursday · 80.5% · 746 recorded · 745 measured · Source: the US BTS Friday · 80.0% · 749 recorded · 748 measured · Source: the US BTS Saturday · 84.7% · 571 recorded · 570 measured · Source: the US BTS Sunday · 72.5% · 721 recorded · 721 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 · 8.6 min · 755 recorded · 754 measured · Source: the US BTS Tuesday · 3.3 min · 618 recorded · 617 measured · Source: the US BTS Wednesday · 4.9 min · 613 recorded · 611 measured · Source: the US BTS Thursday · 7.2 min · 746 recorded · 745 measured · Source: the US BTS Friday · 8.1 min · 749 recorded · 748 measured · Source: the US BTS Saturday · 6.8 min · 571 recorded · 570 measured · Source: the US BTS Sunday · 12.0 min · 721 recorded · 721 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 · 755 · 755 recorded · 754 measured · Source: the US BTS Tuesday · 618 · 618 recorded · 617 measured · Source: the US BTS Wednesday · 613 · 613 recorded · 611 measured · Source: the US BTS Thursday · 746 · 746 recorded · 745 measured · Source: the US BTS Friday · 749 · 749 recorded · 748 measured · Source: the US BTS Saturday · 571 · 571 recorded · 570 measured · Source: the US BTS Sunday · 721 · 721 recorded · 721 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday80.4%8.6 min754755
Tuesday87.2%3.3 min617618
Wednesday87.1%4.9 min611613
Thursday80.5%7.2 min745746
Friday80.0%8.1 min748749
Saturday84.7%6.8 min570571
Sunday72.5%12.0 min721721

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 · 88.5% · 405 recorded · 401 measured · Source: the US BTS Feb · 87.1% · 388 recorded · 388 measured · Source: the US BTS Mar · 84.1% · 427 recorded · 427 measured · Source: the US BTS Apr · 83.2% · 440 recorded · 440 measured · Source: the US BTS May · 80.9% · 466 recorded · 466 measured · Source: the US BTS Jun · 72.2% · 458 recorded · 457 measured · Source: the US BTS Jul · 72.9% · 474 recorded · 473 measured · Source: the US BTS Aug · 80.9% · 220 recorded · 220 measured · Source: the US BTS Sep · 79.9% · 214 recorded · 214 measured · Source: the US BTS Oct · 79.7% · 374 recorded · 374 measured · Source: the US BTS Nov · 86.5% · 453 recorded · 453 measured · Source: the US BTS Dec · 81.9% · 454 recorded · 453 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 · 1.7 min · 405 recorded · 401 measured · Source: the US BTS Feb · 3.8 min · 388 recorded · 388 measured · Source: the US BTS Mar · 6.3 min · 427 recorded · 427 measured · Source: the US BTS Apr · 5.3 min · 440 recorded · 440 measured · Source: the US BTS May · 6.6 min · 466 recorded · 466 measured · Source: the US BTS Jun · 14.8 min · 458 recorded · 457 measured · Source: the US BTS Jul · 14.5 min · 474 recorded · 473 measured · Source: the US BTS Aug · 6.3 min · 220 recorded · 220 measured · Source: the US BTS Sep · 8.8 min · 214 recorded · 214 measured · Source: the US BTS Oct · 8.8 min · 374 recorded · 374 measured · Source: the US BTS Nov · 5.8 min · 453 recorded · 453 measured · Source: the US BTS Dec · 5.7 min · 454 recorded · 453 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 · 405 · 405 recorded · 401 measured · Source: the US BTS Feb · 388 · 388 recorded · 388 measured · Source: the US BTS Mar · 427 · 427 recorded · 427 measured · Source: the US BTS Apr · 440 · 440 recorded · 440 measured · Source: the US BTS May · 466 · 466 recorded · 466 measured · Source: the US BTS Jun · 458 · 458 recorded · 457 measured · Source: the US BTS Jul · 474 · 474 recorded · 473 measured · Source: the US BTS Aug · 220 · 220 recorded · 220 measured · Source: the US BTS Sep · 214 · 214 recorded · 214 measured · Source: the US BTS Oct · 374 · 374 recorded · 374 measured · Source: the US BTS Nov · 453 · 453 recorded · 453 measured · Source: the US BTS Dec · 454 · 454 recorded · 453 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan88.5%1.7 min401405
Feb87.1%3.8 min388388
Mar84.1%6.3 min427427
Apr83.2%5.3 min440440
May80.9%6.6 min466466
Jun72.2%14.8 min457458
Jul72.9%14.5 min473474
Aug80.9%6.3 min220220
Sep79.9%8.8 min214214
Oct79.7%8.8 min374374
Nov86.5%5.8 min453453
Dec81.9%5.7 min453454

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 81.3% 3,880
  • Delayed >15 min 18.6% 886
  • Cancelled 0.1% 7
  • 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

67
67 of 67
Flight numbersBy direction DeparturesOn time
WN2157 ONT → SJC 121 90.0%
WN1246 ONT → SJC 108 80.6%
WN4589 SJC → ONT 98 84.7%
WN4557 ONT → SJC 96 81.3%
WN1788 SJC → ONT 90 84.4%
WN4852 SJC → ONT 69 98.5%
WN3996 ONT → SJC 64 93.7%
WN4510 SJC → ONT 61 91.8%
WN4592 ONT → SJC 61 100.0%
WN3983 SJC → ONT 60 76.7%
WN4143 SJC → ONT 60 86.7%
WN4513 SJC → ONT 60 73.3%
WN1368 ONT → SJC 58 100.0%
WN1698 ONT → SJC 58 86.2%
WN2411 SJC → ONT 58 93.1%
WN250 ONT → SJC 58 86.2%
WN2977 ONT → SJC 58 67.2%
WN3674 ONT → SJC 58 65.5%
WN4253 SJC → ONT 58 93.1%
WN4255 SJC → ONT 58 69.0%
WN4879 SJC → ONT 58 96.5%
WN704 SJC → ONT 58 93.1%
WN757 SJC → ONT 58 87.9%
WN2057 ONT → SJC 57 98.3%
WN3151 SJC → ONT 57 83.9%
WN3164 ONT → SJC 57 49.1%
WN3845 ONT → SJC 57 64.9%
WN3957 ONT → SJC 57 96.5%
WN2501 SJC → ONT 51 52.9%
WN1173 SJC → ONT 50 84.0%
WN2349 ONT → SJC 50 98.0%
WN2767 SJC → ONT 50 76.0%
WN1642 SJC → ONT 47 91.5%
WN3041 ONT → SJC 47 78.7%
WN3676 SJC → ONT 47 74.5%
WN814 SJC → ONT 46 76.1%
WN4103 SJC → ONT 44 100.0%
WN441 ONT → SJC 43 93.0%
WN1280 ONT → SJC 42 88.1%
WN1315 SJC → ONT 42 69.1%
WN1500 SJC → ONT 42 92.9%
WN3692 SJC → ONT 42 40.5%
WN3706 SJC → ONT 42 78.6%
WN3997 ONT → SJC 42 90.5%
WN653 SJC → ONT 42 100.0%
WN658 ONT → SJC 42 92.9%
WN4540 ONT → SJC 40 60.0%
WN4266 SJC → ONT 39 56.4%
WN933 SJC → ONT 37 91.7%
WN3162 ONT → SJC 34 82.4%
WN334 ONT → SJC 34 73.5%
WN110 ONT → SJC 33 100.0%
WN2034 ONT → SJC 33 97.0%
WN2164 SJC → ONT 33 97.0%
WN2715 ONT → SJC 33 81.8%
WN3166 SJC → ONT 33 72.7%
WN3686 SJC → ONT 33 87.9%
WN4132 SJC → ONT 33 93.9%
WN752 ONT → SJC 33 72.7%
WN106 ONT → SJC 32 84.4%
WN3944 SJC → ONT 32 100.0%
WN3623 ONT → SJC 31 48.4%
WN3673 ONT → SJC 31 58.1%
WN1786 SJC → ONT 30 70.0%
WN1827 SJC → ONT 30 70.0%
WN1966 ONT → SJC 30 96.7%
WN2615 SJC → ONT 30 63.3%

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 237 +0.4% 1 71.3%
June 2026 227 −1.3% 1 67.8%
May 2026 220 −10.6% 0 79.1%
April 2026 212 −7.0% 0 80.2%
March 2026 214 +0.5% 0 81.8%
February 2026 198 +4.2% 0 86.4%
January 2026 202 +1.5% 0 88.6%
December 2025 235 +7.8% 1 83.4%
November 2025 234 +6.8% 0 84.2%
October 2025 220 +42.9% 0 70.9%
September 2025 214 0 79.9%
August 2025 220 0 80.9%
July 2025 236 0 74.6%
June 2025 230 0 76.5%
May 2025 246 0 82.5%
April 2025 228 0 86.0%
March 2025 213 0 86.4%
February 2025 190 0 87.9%
January 2025 199 4 88.4%
December 2024 218 0 80.3%
November 2024 219 0 89.0%
October 2024 154 0 92.2%

How to read this chart

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