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1,072 km · Domestic

Raleigh-Durham (RDU) – St. Louis Lambert (STL)

In July 2026, 122 flights operated between Raleigh-Durham and St. Louis Lambert (both directions), and 59.0% 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
January6862▼ 8.8%
February7268▼ 5.6%
March115117▲ 1.7%
April114126▲ 10.5%
May112130▲ 16.1%
June112120▲ 7.1%
July115122▲ 6.1%
August106––
September104––
October116–in progress
November116––
December120––
Year to date (Jan–Jul)708745▲ 5.2%

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
January79.4%90.3%▲ 13.7%
February88.9%83.8%▼ 5.7%
March87.8%70.9%▼ 19.2%
April80.7%73.8%▼ 8.6%
May84.8%70.0%▼ 17.5%
June75.9%65.0%▼ 14.4%
July77.4%59.0%▼ 23.8%
August83.0%––
September88.5%––
October75.9%–in progress
November80.2%––
December84.2%––
Year-to-date average (Jan–Jul)82.1%73.3%▼ 10.8%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January62▼ 66.7%
February00–
March110.0%
April00–
May00–
June00–
July10▼ 100.0%
August0––
September0––
October0–in progress
November0––
December0––
Year to date (Jan–Jul)83▼ 62.5%

By direction

RDU → STL

Scheduled flights
1,166
Flights operated
1,159
Cancelled
7 · 0.6%
On-time departures
78.6%

STL → RDU

Scheduled flights
1,166
Flights operated
1,162
Cancelled
4 · 0.3%
On-time departures
78.8%

RDU → STL and STL → RDU counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 2,332 100.0% 78.7% 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 delay08:00–09:001.6min · 370 recorded · 367 measured
Gap to highest-delay hour24.2min08:00 ↔ 19:00
Recorded flights2,332RDU–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 · 150 recorded · 150 measured · Source: the US BTS 07:00 · 94.4% · 340 recorded · 338 measured · Source: the US BTS 08:00 · 94.0% · 370 recorded · 367 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 97 recorded · 96 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 135 recorded · 135 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 34 recorded · 34 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 24 recorded · 24 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 32 recorded · 32 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 19 recorded · 19 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 18 recorded · 18 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 19 recorded · 19 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 81 recorded · 81 measured · Source: the US BTS 18:00 · 78.9% · 266 recorded · 265 measured · Source: the US BTS 19:00 · 51.2% · 372 recorded · 371 measured · Source: the US BTS 20:00 · 61.2% · 356 recorded · 353 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 18 recorded · 18 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 · 150 recorded · 150 measured · Source: the US BTS 07:00 · 3.4 min · 340 recorded · 338 measured · Source: the US BTS 08:00 · 1.6 min · 370 recorded · 367 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 97 recorded · 96 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 135 recorded · 135 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 34 recorded · 34 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 24 recorded · 24 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 32 recorded · 32 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 19 recorded · 19 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 18 recorded · 18 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 19 recorded · 19 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 81 recorded · 81 measured · Source: the US BTS 18:00 · 8.1 min · 266 recorded · 265 measured · Source: the US BTS 19:00 · 25.8 min · 372 recorded · 371 measured · Source: the US BTS 20:00 · 20.0 min · 356 recorded · 353 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 18 recorded · 18 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 · 150 · 150 recorded · 150 measured · Source: the US BTS 07:00 · 340 · 340 recorded · 338 measured · Source: the US BTS 08:00 · 370 · 370 recorded · 367 measured · Source: the US BTS 09:00 · 97 · 97 recorded · 96 measured · Source: the US BTS 10:00 · 135 · 135 recorded · 135 measured · Source: the US BTS 11:00 · 34 · 34 recorded · 34 measured · Source: the US BTS 12:00 · 24 · 24 recorded · 24 measured · Source: the US BTS 13:00 · 32 · 32 recorded · 32 measured · Source: the US BTS 14:00 · 19 · 19 recorded · 19 measured · Source: the US BTS 15:00 · 18 · 18 recorded · 18 measured · Source: the US BTS 16:00 · 19 · 19 recorded · 19 measured · Source: the US BTS 17:00 · 81 · 81 recorded · 81 measured · Source: the US BTS 18:00 · 266 · 266 recorded · 265 measured · Source: the US BTS 19:00 · 372 · 372 recorded · 371 measured · Source: the US BTS 20:00 · 356 · 356 recorded · 353 measured · Source: the US BTS 21:00 · 18 · 18 recorded · 18 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

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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—150150
07:0094.4%3.4 min338340
08:0094.0%1.6 min367370
09:00Fewer than 200 measured departures—9697
10:00Fewer than 200 measured departures—135135
11:00Fewer than 200 measured departures—3434
12:00Fewer than 200 measured departures—2424
13:00Fewer than 200 measured departures—3232
14:00Fewer than 200 measured departures—1919
15:00Fewer than 200 measured departures—1818
16:00Fewer than 200 measured departures—1919
17:00Fewer than 200 measured departures—8181
18:0078.9%8.1 min265266
19:0051.2%25.8 min371372
20:0061.2%20.0 min353356
21:00Fewer than 200 measured departures—1818
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% · 348 recorded · 345 measured · Source: the US BTS Tuesday · 87.1% · 340 recorded · 340 measured · Source: the US BTS Wednesday · 86.5% · 340 recorded · 340 measured · Source: the US BTS Thursday · 73.8% · 348 recorded · 347 measured · Source: the US BTS Friday · 77.1% · 358 recorded · 358 measured · Source: the US BTS Saturday · 77.4% · 248 recorded · 248 measured · Source: the US BTS Sunday · 73.2% · 350 recorded · 343 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 · 13.9 min · 348 recorded · 345 measured · Source: the US BTS Tuesday · 4.4 min · 340 recorded · 340 measured · Source: the US BTS Wednesday · 6.0 min · 340 recorded · 340 measured · Source: the US BTS Thursday · 12.7 min · 348 recorded · 347 measured · Source: the US BTS Friday · 13.0 min · 358 recorded · 358 measured · Source: the US BTS Saturday · 10.5 min · 248 recorded · 248 measured · Source: the US BTS Sunday · 12.4 min · 350 recorded · 343 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 · 348 · 348 recorded · 345 measured · Source: the US BTS Tuesday · 340 · 340 recorded · 340 measured · Source: the US BTS Wednesday · 340 · 340 recorded · 340 measured · Source: the US BTS Thursday · 348 · 348 recorded · 347 measured · Source: the US BTS Friday · 358 · 358 recorded · 358 measured · Source: the US BTS Saturday · 248 · 248 recorded · 248 measured · Source: the US BTS Sunday · 350 · 350 recorded · 343 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday75.9%13.9 min345348
Tuesday87.1%4.4 min340340
Wednesday86.5%6.0 min340340
Thursday73.8%12.7 min347348
Friday77.1%13.0 min358358
Saturday77.4%10.5 min248248
Sunday73.2%12.4 min343350

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 · Fewer than 200 measured departures · 138 recorded · 130 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 140 recorded · 140 measured · Source: the US BTS Mar · 79.3% · 234 recorded · 232 measured · Source: the US BTS Apr · 77.1% · 240 recorded · 240 measured · Source: the US BTS May · 76.9% · 242 recorded · 242 measured · Source: the US BTS Jun · 70.3% · 232 recorded · 232 measured · Source: the US BTS Jul · 67.9% · 238 recorded · 237 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 106 recorded · 106 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 104 recorded · 104 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 190 recorded · 190 measured · Source: the US BTS Nov · 83.8% · 228 recorded · 228 measured · Source: the US BTS Dec · 80.8% · 240 recorded · 240 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · Fewer than 200 measured departures · 138 recorded · 130 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 140 recorded · 140 measured · Source: the US BTS Mar · 8.3 min · 234 recorded · 232 measured · Source: the US BTS Apr · 12.5 min · 240 recorded · 240 measured · Source: the US BTS May · 12.0 min · 242 recorded · 242 measured · Source: the US BTS Jun · 15.8 min · 232 recorded · 232 measured · Source: the US BTS Jul · 20.0 min · 238 recorded · 237 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 106 recorded · 106 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 104 recorded · 104 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 190 recorded · 190 measured · Source: the US BTS Nov · 7.6 min · 228 recorded · 228 measured · Source: the US BTS Dec · 8.3 min · 240 recorded · 240 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 · 138 · 138 recorded · 130 measured · Source: the US BTS Feb · 140 · 140 recorded · 140 measured · Source: the US BTS Mar · 234 · 234 recorded · 232 measured · Source: the US BTS Apr · 240 · 240 recorded · 240 measured · Source: the US BTS May · 242 · 242 recorded · 242 measured · Source: the US BTS Jun · 232 · 232 recorded · 232 measured · Source: the US BTS Jul · 238 · 238 recorded · 237 measured · Source: the US BTS Aug · 106 · 106 recorded · 106 measured · Source: the US BTS Sep · 104 · 104 recorded · 104 measured · Source: the US BTS Oct · 190 · 190 recorded · 190 measured · Source: the US BTS Nov · 228 · 228 recorded · 228 measured · Source: the US BTS Dec · 240 · 240 recorded · 240 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
JanFewer than 200 measured departures—130138
FebFewer than 200 measured departures—140140
Mar79.3%8.3 min232234
Apr77.1%12.5 min240240
May76.9%12.0 min242242
Jun70.3%15.8 min232232
Jul67.9%20.0 min237238
AugFewer than 200 measured departures—106106
SepFewer than 200 measured departures—104104
OctFewer than 200 measured departures—190190
Nov83.8%7.6 min228228
Dec80.8%8.3 min240240

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 78.3% 1,827
  • Delayed >15 min 21.2% 494
  • Cancelled 0.5% 11
  • 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

33
33 of 33
Flight numbersBy direction DeparturesOn time
WN2523 STL → RDU 92 80.4%
WN1020 RDU → STL 87 84.9%
WN4544 RDU → STL 64 92.2%
WN3032 STL → RDU 60 86.7%
WN3036 STL → RDU 60 75.0%
WN3046 RDU → STL 58 98.3%
WN3343 STL → RDU 58 87.9%
WN4154 RDU → STL 58 96.6%
WN1788 RDU → STL 57 91.2%
WN2623 STL → RDU 57 79.0%
WN3435 RDU → STL 57 93.0%
WN3457 RDU → STL 57 19.3%
WN3810 STL → RDU 57 49.1%
WN4002 RDU → STL 57 42.1%
WN749 STL → RDU 57 64.9%
WN2854 STL → RDU 52 88.5%
WN3545 STL → RDU 52 63.5%
WN3951 RDU → STL 52 92.3%
WN3915 STL → RDU 50 96.0%
WN571 STL → RDU 50 88.0%
WN878 STL → RDU 50 72.0%
WN3142 STL → RDU 47 80.4%
WN3822 RDU → STL 42 81.0%
WN187 STL → RDU 39 97.4%
WN614 RDU → STL 35 55.9%
WN1179 STL → RDU 33 57.6%
WN186 STL → RDU 33 93.9%
WN2536 RDU → STL 33 84.4%
WN3976 STL → RDU 33 72.7%
WN4126 STL → RDU 33 81.8%
WN4312 RDU → STL 33 93.9%
WN452 RDU → STL 33 43.8%
WN4314 RDU → STL 31 93.6%

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 122 +6.1% 0 59.0%
June 2026 120 +7.1% 0 65.0%
May 2026 130 +16.1% 0 70.0%
April 2026 126 +10.5% 0 73.8%
March 2026 117 +1.7% 1 70.9%
February 2026 68 −5.6% 0 83.8%
January 2026 62 −8.8% 2 90.3%
December 2025 120 +0.0% 0 84.2%
November 2025 116 +3.6% 0 80.2%
October 2025 116 +56.8% 0 75.9%
September 2025 104 0 88.5%
August 2025 106 0 83.0%
July 2025 115 1 77.4%
June 2025 112 0 75.9%
May 2025 112 0 84.8%
April 2025 114 0 80.7%
March 2025 115 1 87.8%
February 2025 72 0 88.9%
January 2025 68 6 79.4%
December 2024 120 0 77.5%
November 2024 112 0 87.5%
October 2024 74 0 86.5%

How to read this chart

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