Aviation Data
EN
EnglishTiếng Việt

889 km · Domestic

Pittsburgh (PIT) – St. Louis Lambert (STL)

In July 2026, 116 flights operated between Pittsburgh and St. Louis Lambert (both directions), and 66.4% 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
January5453▼ 1.9%
February5254▲ 3.8%
March62108▲ 74.2%
April60112▲ 86.7%
May62112▲ 80.6%
June68111▲ 63.2%
July69116▲ 68.1%
August70––
September68––
October70–in progress
November62––
December62––
Year to date (Jan–Jul)427666▲ 56.0%

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
January81.5%79.2%▼ 2.8%
February76.9%87.0%▲ 13.1%
March82.3%69.4%▼ 15.7%
April83.3%75.9%▼ 8.9%
May69.4%68.8%▼ 0.9%
June82.4%73.9%▼ 10.3%
July81.2%66.4%▼ 18.2%
August81.4%––
September88.2%––
October75.7%–in progress
November88.7%––
December79.0%––
Year-to-date average (Jan–Jul)79.6%74.4%▼ 6.5%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January21▼ 50.0%
February00–
March00–
April00–
May00–
June00–
July10▼ 100.0%
August0––
September0––
October0–in progress
November0––
December0––
Year to date (Jan–Jul)31▼ 66.7%

By direction

PIT → STL

Scheduled flights
799
Flights operated
797
Cancelled
2 · 0.3%
On-time departures
79.7%

STL → PIT

Scheduled flights
800
Flights operated
798
Cancelled
2 · 0.3%
On-time departures
77.4%

PIT → STL and STL → PIT counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 1,599 100.0% 78.6% 4

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 delay10:00–11:007.0min · 229 recorded · 228 measured
Recorded flights1,599PIT–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 · 127 recorded · 127 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 69 recorded · 69 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 126 recorded · 126 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 75 recorded · 75 measured · Source: the US BTS 10:00 · 87.7% · 229 recorded · 228 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 4 recorded · 4 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 108 recorded · 108 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 156 recorded · 156 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 105 recorded · 104 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 45 recorded · 45 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 79 recorded · 79 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 22 recorded · 22 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 150 recorded · 149 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 156 recorded · 156 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 127 recorded · 126 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 20 recorded · 20 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 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 · 1 recorded · 1 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 127 recorded · 127 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 69 recorded · 69 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 126 recorded · 126 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 75 recorded · 75 measured · Source: the US BTS 10:00 · 7.0 min · 229 recorded · 228 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 4 recorded · 4 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 108 recorded · 108 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 156 recorded · 156 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 105 recorded · 104 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 45 recorded · 45 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 79 recorded · 79 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 22 recorded · 22 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 150 recorded · 149 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 156 recorded · 156 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 127 recorded · 126 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 20 recorded · 20 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 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 · 1 · 1 recorded · 1 measured · Source: the US BTS 06:00 · 127 · 127 recorded · 127 measured · Source: the US BTS 07:00 · 69 · 69 recorded · 69 measured · Source: the US BTS 08:00 · 126 · 126 recorded · 126 measured · Source: the US BTS 09:00 · 75 · 75 recorded · 75 measured · Source: the US BTS 10:00 · 229 · 229 recorded · 228 measured · Source: the US BTS 11:00 · 4 · 4 recorded · 4 measured · Source: the US BTS 12:00 · 108 · 108 recorded · 108 measured · Source: the US BTS 13:00 · 156 · 156 recorded · 156 measured · Source: the US BTS 14:00 · 105 · 105 recorded · 104 measured · Source: the US BTS 15:00 · 45 · 45 recorded · 45 measured · Source: the US BTS 16:00 · 79 · 79 recorded · 79 measured · Source: the US BTS 17:00 · 22 · 22 recorded · 22 measured · Source: the US BTS 18:00 · 150 · 150 recorded · 149 measured · Source: the US BTS 19:00 · 156 · 156 recorded · 156 measured · Source: the US BTS 20:00 · 127 · 127 recorded · 126 measured · Source: the US BTS 21:00 · 20 · 20 recorded · 20 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 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—11
06:00Fewer than 200 measured departures—127127
07:00Fewer than 200 measured departures—6969
08:00Fewer than 200 measured departures—126126
09:00Fewer than 200 measured departures—7575
10:0087.7%7.0 min228229
11:00Fewer than 200 measured departures—44
12:00Fewer than 200 measured departures—108108
13:00Fewer than 200 measured departures—156156
14:00Fewer than 200 measured departures—104105
15:00Fewer than 200 measured departures—4545
16:00Fewer than 200 measured departures—7979
17:00Fewer than 200 measured departures—2222
18:00Fewer than 200 measured departures—149150
19:00Fewer than 200 measured departures—156156
20:00Fewer than 200 measured departures—126127
21:00Fewer than 200 measured departures—2020
22:00No observations———
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 75.9% · 230 recorded · 228 measured · Source: the US BTS Tuesday · 85.7% · 230 recorded · 230 measured · Source: the US BTS Wednesday · 85.2% · 230 recorded · 230 measured · Source: the US BTS Thursday · 78.4% · 231 recorded · 231 measured · Source: the US BTS Friday · 76.3% · 232 recorded · 232 measured · Source: the US BTS Saturday · Fewer than 200 measured departures · 168 recorded · 168 measured · Source: the US BTS Sunday · 70.3% · 278 recorded · 276 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 · 12.9 min · 230 recorded · 228 measured · Source: the US BTS Tuesday · 4.6 min · 230 recorded · 230 measured · Source: the US BTS Wednesday · 4.8 min · 230 recorded · 230 measured · Source: the US BTS Thursday · 9.1 min · 231 recorded · 231 measured · Source: the US BTS Friday · 12.4 min · 232 recorded · 232 measured · Source: the US BTS Saturday · Fewer than 200 measured departures · 168 recorded · 168 measured · Source: the US BTS Sunday · 15.7 min · 278 recorded · 276 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 · 230 · 230 recorded · 228 measured · Source: the US BTS Tuesday · 230 · 230 recorded · 230 measured · Source: the US BTS Wednesday · 230 · 230 recorded · 230 measured · Source: the US BTS Thursday · 231 · 231 recorded · 231 measured · Source: the US BTS Friday · 232 · 232 recorded · 232 measured · Source: the US BTS Saturday · 168 · 168 recorded · 168 measured · Source: the US BTS Sunday · 278 · 278 recorded · 276 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
Monday75.9%12.9 min228230
Tuesday85.7%4.6 min230230
Wednesday85.2%4.8 min230230
Thursday78.4%9.1 min231231
Friday76.3%12.4 min232232
SaturdayFewer than 200 measured departures—168168
Sunday70.3%15.7 min276278

Month of year

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

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 110 · 110 recorded · 107 measured · Source: the US BTS Feb · 106 · 106 recorded · 106 measured · Source: the US BTS Mar · 170 · 170 recorded · 170 measured · Source: the US BTS Apr · 172 · 172 recorded · 172 measured · Source: the US BTS May · 174 · 174 recorded · 174 measured · Source: the US BTS Jun · 179 · 179 recorded · 179 measured · Source: the US BTS Jul · 186 · 186 recorded · 185 measured · Source: the US BTS Aug · 70 · 70 recorded · 70 measured · Source: the US BTS Sep · 68 · 68 recorded · 68 measured · Source: the US BTS Oct · 116 · 116 recorded · 116 measured · Source: the US BTS Nov · 122 · 122 recorded · 122 measured · Source: the US BTS Dec · 126 · 126 recorded · 126 measured · Source: the US BTS

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

No bucket in this view has 200 measured departures yet. Flight counts are shown; on-time and delay charts become available when the sample is large enough.

View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
JanFewer than 200 measured departures—107110
FebFewer than 200 measured departures—106106
MarFewer than 200 measured departures—170170
AprFewer than 200 measured departures—172172
MayFewer than 200 measured departures—174174
JunFewer than 200 measured departures—179179
JulFewer than 200 measured departures—185186
AugFewer than 200 measured departures—7070
SepFewer than 200 measured departures—6868
OctFewer than 200 measured departures—116116
NovFewer than 200 measured departures—122122
DecFewer than 200 measured departures—126126

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 78.4% 1,253
  • Delayed >15 min 21.4% 342
  • Cancelled 0.3% 4
  • 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

19
19 of 19
Flight numbersBy direction DeparturesOn time
WN2177 PIT → STL 87 90.7%
WN1363 STL → PIT 61 73.3%
WN3744 PIT → STL 61 91.8%
WN4639 PIT → STL 58 96.6%
WN734 STL → PIT 58 79.3%
WN2620 STL → PIT 57 50.9%
WN3386 PIT → STL 57 94.7%
WN1083 STL → PIT 50 94.0%
WN2638 PIT → STL 50 78.0%
WN3272 PIT → STL 50 83.7%
WN3387 PIT → STL 50 40.0%
WN3773 STL → PIT 50 88.0%
WN3972 STL → PIT 50 54.0%
WN3945 PIT → STL 49 51.0%
WN3551 STL → PIT 46 91.3%
WN1056 STL → PIT 42 76.2%
WN2156 PIT → STL 33 93.9%
WN2338 STL → PIT 33 63.6%
WN3971 STL → PIT 33 72.7%

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 116 +68.1% 0 66.4%
June 2026 111 +63.2% 0 73.9%
May 2026 112 +80.6% 0 68.8%
April 2026 112 +86.7% 0 75.9%
March 2026 108 +74.2% 0 69.4%
February 2026 54 +3.8% 0 87.0%
January 2026 53 −1.9% 1 79.2%
December 2025 62 −3.1% 0 79.0%
November 2025 62 +3.3% 0 88.7%
October 2025 70 +52.2% 0 75.7%
September 2025 68 0 88.2%
August 2025 70 0 81.4%
July 2025 69 1 81.2%
June 2025 68 0 82.4%
May 2025 62 0 69.4%
April 2025 60 0 83.3%
March 2025 62 0 82.3%
February 2025 52 0 76.9%
January 2025 54 2 81.5%
December 2024 64 0 90.6%
November 2024 60 0 93.3%
October 2024 46 0 87.0%

How to read this chart

Loading the guide…