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2,786 km · Domestic

San Francisco (SFO) – St. Louis Lambert (STL)

In July 2026, 123 flights operated between San Francisco and St. Louis Lambert (both directions), and 35.0% 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
January113133▲ 17.7%
February107119▲ 11.2%
March124118▼ 4.8%
April120150▲ 25.0%
May164142▼ 13.4%
June164120▼ 26.8%
July164123▼ 25.0%
August124––
September120––
October124–in progress
November114––
December121––
Year to date (Jan–Jul)956905▼ 5.3%

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
January69.0%88.7%▲ 28.6%
February69.2%70.6%▲ 2.0%
March72.6%79.7%▲ 9.8%
April71.7%54.0%▼ 24.7%
May76.2%34.5%▼ 54.7%
June73.2%40.0%▼ 45.4%
July54.9%35.0%▼ 36.2%
August75.8%––
September81.7%––
October60.5%–in progress
November58.8%––
December64.5%––
Year-to-date average (Jan–Jul)69.5%57.5%▼ 17.3%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January550.0%
February00–
March02–
April04–
May00–
June00–
July21▼ 50.0%
August1––
September0––
October0–in progress
November0––
December0––
Year to date (Jan–Jul)712▲ 71.4%

Airlines on this route

  1. Southwest Airlines 43.9%
  2. United Airlines 39.8%
  3. SkyWest Airlines 16.3%

Oct 1, 2024 – Jul 31, 2026

By direction

SFO → STL

Scheduled flights
1,434
Flights operated
1,422
Cancelled
12 · 0.8%
On-time departures
65.7%

STL → SFO

Scheduled flights
1,434
Flights operated
1,425
Cancelled
9 · 0.6%
On-time departures
65.9%

SFO → STL and STL → SFO counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 1,259 43.9% 55.1% 4
United Airlines UA 1,141 39.8% 75.1% 6
SkyWest Airlines OO 468 16.3% 72.2% 11

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 delay11:00–12:0018.0min · 325 recorded · 325 measured
Gap to highest-delay hour12.3min11:00 ↔ 08:00
Recorded flights2,868SFO–STL

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 · 1 recorded · 1 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 157 recorded · 156 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 160 recorded · 160 measured · Source: the US BTS 08:00 · 60.6% · 213 recorded · 208 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 184 recorded · 183 measured · Source: the US BTS 10:00 · 65.9% · 501 recorded · 498 measured · Source: the US BTS 11:00 · 65.5% · 325 recorded · 325 measured · Source: the US BTS 12:00 · 57.1% · 288 recorded · 287 measured · Source: the US BTS 13:00 · 53.0% · 202 recorded · 202 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 36 recorded · 36 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 37 recorded · 37 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 123 recorded · 121 measured · Source: the US BTS 17:00 · 70.9% · 281 recorded · 278 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 92 recorded · 90 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 155 recorded · 154 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 5 recorded · 5 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 7 recorded · 7 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 25 recorded · 25 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 76 recorded · 74 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 · 1 recorded · 1 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 157 recorded · 156 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 160 recorded · 160 measured · Source: the US BTS 08:00 · 30.3 min · 213 recorded · 208 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 184 recorded · 183 measured · Source: the US BTS 10:00 · 18.6 min · 501 recorded · 498 measured · Source: the US BTS 11:00 · 18.0 min · 325 recorded · 325 measured · Source: the US BTS 12:00 · 26.4 min · 288 recorded · 287 measured · Source: the US BTS 13:00 · 30.1 min · 202 recorded · 202 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 36 recorded · 36 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 37 recorded · 37 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 123 recorded · 121 measured · Source: the US BTS 17:00 · 19.0 min · 281 recorded · 278 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 92 recorded · 90 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 155 recorded · 154 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 5 recorded · 5 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 7 recorded · 7 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 25 recorded · 25 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 76 recorded · 74 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 · 1 · 1 recorded · 1 measured · Source: the US BTS 06:00 · 157 · 157 recorded · 156 measured · Source: the US BTS 07:00 · 160 · 160 recorded · 160 measured · Source: the US BTS 08:00 · 213 · 213 recorded · 208 measured · Source: the US BTS 09:00 · 184 · 184 recorded · 183 measured · Source: the US BTS 10:00 · 501 · 501 recorded · 498 measured · Source: the US BTS 11:00 · 325 · 325 recorded · 325 measured · Source: the US BTS 12:00 · 288 · 288 recorded · 287 measured · Source: the US BTS 13:00 · 202 · 202 recorded · 202 measured · Source: the US BTS 14:00 · 36 · 36 recorded · 36 measured · Source: the US BTS 15:00 · 37 · 37 recorded · 37 measured · Source: the US BTS 16:00 · 123 · 123 recorded · 121 measured · Source: the US BTS 17:00 · 281 · 281 recorded · 278 measured · Source: the US BTS 18:00 · 92 · 92 recorded · 90 measured · Source: the US BTS 19:00 · 155 · 155 recorded · 154 measured · Source: the US BTS 20:00 · 5 · 5 recorded · 5 measured · Source: the US BTS 21:00 · 7 · 7 recorded · 7 measured · Source: the US BTS 22:00 · 25 · 25 recorded · 25 measured · Source: the US BTS 23:00 · 76 · 76 recorded · 74 measured · Source: the US BTS

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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—11
06:00Fewer than 200 measured departures—156157
07:00Fewer than 200 measured departures—160160
08:0060.6%30.3 min208213
09:00Fewer than 200 measured departures—183184
10:0065.9%18.6 min498501
11:0065.5%18.0 min325325
12:0057.1%26.4 min287288
13:0053.0%30.1 min202202
14:00Fewer than 200 measured departures—3636
15:00Fewer than 200 measured departures—3737
16:00Fewer than 200 measured departures—121123
17:0070.9%19.0 min278281
18:00Fewer than 200 measured departures—9092
19:00Fewer than 200 measured departures—154155
20:00Fewer than 200 measured departures—55
21:00Fewer than 200 measured departures—77
22:00Fewer than 200 measured departures—2525
23:00Fewer than 200 measured departures—7476

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 60.8% · 434 recorded · 431 measured · Source: the US BTS Tuesday · 68.9% · 379 recorded · 379 measured · Source: the US BTS Wednesday · 65.2% · 411 recorded · 411 measured · Source: the US BTS Thursday · 63.0% · 431 recorded · 430 measured · Source: the US BTS Friday · 65.4% · 432 recorded · 431 measured · Source: the US BTS Saturday · 75.8% · 339 recorded · 330 measured · Source: the US BTS Sunday · 64.1% · 442 recorded · 435 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 · 26.9 min · 434 recorded · 431 measured · Source: the US BTS Tuesday · 18.4 min · 379 recorded · 379 measured · Source: the US BTS Wednesday · 18.7 min · 411 recorded · 411 measured · Source: the US BTS Thursday · 24.6 min · 431 recorded · 430 measured · Source: the US BTS Friday · 23.4 min · 432 recorded · 431 measured · Source: the US BTS Saturday · 18.0 min · 339 recorded · 330 measured · Source: the US BTS Sunday · 25.6 min · 442 recorded · 435 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 · 434 · 434 recorded · 431 measured · Source: the US BTS Tuesday · 379 · 379 recorded · 379 measured · Source: the US BTS Wednesday · 411 · 411 recorded · 411 measured · Source: the US BTS Thursday · 431 · 431 recorded · 430 measured · Source: the US BTS Friday · 432 · 432 recorded · 431 measured · Source: the US BTS Saturday · 339 · 339 recorded · 330 measured · Source: the US BTS Sunday · 442 · 442 recorded · 435 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday60.8%26.9 min431434
Tuesday68.9%18.4 min379379
Wednesday65.2%18.7 min411411
Thursday63.0%24.6 min430431
Friday65.4%23.4 min431432
Saturday75.8%18.0 min330339
Sunday64.1%25.6 min435442

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 · 79.7% · 256 recorded · 246 measured · Source: the US BTS Feb · 69.9% · 226 recorded · 226 measured · Source: the US BTS Mar · 76.0% · 244 recorded · 242 measured · Source: the US BTS Apr · 61.9% · 274 recorded · 270 measured · Source: the US BTS May · 56.9% · 306 recorded · 306 measured · Source: the US BTS Jun · 59.2% · 284 recorded · 284 measured · Source: the US BTS Jul · 46.3% · 290 recorded · 287 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 125 recorded · 124 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 120 recorded · 120 measured · Source: the US BTS Oct · 72.1% · 226 recorded · 226 measured · Source: the US BTS Nov · 67.2% · 268 recorded · 268 measured · Source: the US BTS Dec · 63.7% · 249 recorded · 248 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 · 16.0 min · 256 recorded · 246 measured · Source: the US BTS Feb · 19.1 min · 226 recorded · 226 measured · Source: the US BTS Mar · 18.5 min · 244 recorded · 242 measured · Source: the US BTS Apr · 29.5 min · 274 recorded · 270 measured · Source: the US BTS May · 27.8 min · 306 recorded · 306 measured · Source: the US BTS Jun · 24.9 min · 284 recorded · 284 measured · Source: the US BTS Jul · 33.5 min · 290 recorded · 287 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 125 recorded · 124 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 120 recorded · 120 measured · Source: the US BTS Oct · 13.0 min · 226 recorded · 226 measured · Source: the US BTS Nov · 20.7 min · 268 recorded · 268 measured · Source: the US BTS Dec · 27.8 min · 249 recorded · 248 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 · 256 · 256 recorded · 246 measured · Source: the US BTS Feb · 226 · 226 recorded · 226 measured · Source: the US BTS Mar · 244 · 244 recorded · 242 measured · Source: the US BTS Apr · 274 · 274 recorded · 270 measured · Source: the US BTS May · 306 · 306 recorded · 306 measured · Source: the US BTS Jun · 284 · 284 recorded · 284 measured · Source: the US BTS Jul · 290 · 290 recorded · 287 measured · Source: the US BTS Aug · 125 · 125 recorded · 124 measured · Source: the US BTS Sep · 120 · 120 recorded · 120 measured · Source: the US BTS Oct · 226 · 226 recorded · 226 measured · Source: the US BTS Nov · 268 · 268 recorded · 268 measured · Source: the US BTS Dec · 249 · 249 recorded · 248 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan79.7%16.0 min246256
Feb69.9%19.1 min226226
Mar76.0%18.5 min242244
Apr61.9%29.5 min270274
May56.9%27.8 min306306
Jun59.2%24.9 min284284
Jul46.3%33.5 min287290
AugFewer than 200 measured departures—124125
SepFewer than 200 measured departures—120120
Oct72.1%13.0 min226226
Nov67.2%20.7 min268268
Dec63.7%27.8 min248249

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 65.3% 1,873
  • Delayed >15 min 34.0% 974
  • Cancelled 0.7% 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

35
35 of 35
Flight numbersBy direction DeparturesOn time
UA336 SFO → STL 288 80.8%
UA246 STL → SFO 190 76.8%
WN352 STL → SFO 110 55.5%
UA2416 STL → SFO 77 72.7%
WN291 SFO → STL 75 70.7%
UA2090 SFO → STL 72 80.6%
UA2482 STL → SFO 72 30.6%
WN2063 SFO → STL 61 59.0%
WN4243 STL → SFO 61 59.0%
WN2258 SFO → STL 58 74.1%
WN3198 STL → SFO 57 56.1%
OO5736 SFO → STL 55 83.3%
OO5907 STL → SFO 55 92.6%
WN2265 STL → SFO 55 67.3%
OO6046 SFO → STL 53 48.1%
WN1596 STL → SFO 53 75.5%
WN570 SFO → STL 53 69.8%
OO5728 STL → SFO 52 68.6%
WN3322 SFO → STL 50 58.0%
WN4219 SFO → STL 50 6.0%
UA2864 SFO → STL 49 85.1%
UA2110 STL → SFO 43 54.8%
WN2654 SFO → STL 43 29.3%
WN1749 STL → SFO 42 40.5%
WN2957 SFO → STL 42 26.2%
WN4015 STL → SFO 40 87.2%
OO5739 SFO → STL 37 63.9%
OO5943 STL → SFO 37 38.9%
UA1603 STL → SFO 37 86.5%
UA1998 SFO → STL 37 81.1%
WN1156 SFO → STL 33 60.6%
WN2412 STL → SFO 33 60.6%
UA1315 STL → SFO 32 62.5%
UA2144 STL → SFO 30 73.3%
WN575 SFO → STL 30 36.7%

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 123 −25.0% 1 35.0%
June 2026 120 −26.8% 0 40.0%
May 2026 142 −13.4% 0 34.5%
April 2026 150 +25.0% 4 54.0%
March 2026 118 −4.8% 2 79.7%
February 2026 119 +11.2% 0 70.6%
January 2026 133 +17.7% 5 88.7%
December 2025 121 −4.7% 0 64.5%
November 2025 114 −26.0% 0 58.8%
October 2025 124 +21.6% 0 60.5%
September 2025 120 0 81.7%
August 2025 124 1 75.8%
July 2025 164 2 54.9%
June 2025 164 0 73.2%
May 2025 164 0 76.2%
April 2025 120 0 71.7%
March 2025 124 0 72.6%
February 2025 107 0 69.2%
January 2025 113 5 69.0%
December 2024 127 1 63.0%
November 2024 154 0 73.4%
October 2024 102 0 86.3%

How to read this chart

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