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417 km · Domestic

Des Moines (DSM) – St. Louis Lambert (STL)

In March 2026, 16 flights operated between Des Moines and St. Louis Lambert (both directions), and 68.8% left on time, according to the US BTS.

Official · March 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 periods15 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January114116▲ 1.8%
February1041040.0%
March11016▼ 85.5%
April112––
May111––
June112––
July114––
August112––
September112––
October114–in progress
November108––
December119––
Year to date (Jan–Mar)328236▼ 28.0%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods15 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January86.8%86.2%▼ 0.7%
February86.5%89.4%▲ 3.4%
March85.5%68.8%▼ 19.5%
April77.7%––
May75.7%––
June82.1%––
July80.7%––
August75.0%––
September85.7%––
October86.0%–in progress
November86.1%––
December74.8%––
Year-to-date average (Jan–Mar)86.3%81.5%▼ 5.6%

Cancelled flights by month

The most recent periods15 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January40▼ 100.0%
February00–
March40▼ 100.0%
April0––
May1––
June0––
July0––
August0––
September0––
October0–in progress
November4––
December1––
Year to date (Jan–Mar)80▼ 100.0%

By direction

DSM → STL

Scheduled flights
948
Flights operated
941
Cancelled
7 · 0.7%
On-time departures
87.0%

STL → DSM

Scheduled flights
948
Flights operated
941
Cancelled
7 · 0.7%
On-time departures
78.5%

DSM → STL and STL → DSM counted separately.

Airlines on this route

Oct 1, 2024 – Mar 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 1,896 100.0% 82.8% 14

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 → Mar 4, 2026

Lowest average delay06:00–07:00-0.3min · 240 recorded · 238 measured
Gap to highest-delay hour19.5min06:00 ↔ 22:00
Recorded flights1,896DSM–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 · 94.6% · 207 recorded · 204 measured · Source: the US BTS 06:00 · 97.1% · 240 recorded · 238 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 10 recorded · 10 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 50 recorded · 50 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 195 recorded · 194 measured · Source: the US BTS 10:00 · 90.8% · 207 recorded · 207 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 57 recorded · 56 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 24 recorded · 24 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 22 recorded · 22 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 33 recorded · 33 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 153 recorded · 152 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 88 recorded · 88 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 170 recorded · 169 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 137 recorded · 135 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 100 recorded · 99 measured · Source: the US BTS 22:00 · 64.2% · 203 recorded · 201 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 · 0.5 min · 207 recorded · 204 measured · Source: the US BTS 06:00 · -0.3 min · 240 recorded · 238 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 10 recorded · 10 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 50 recorded · 50 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 195 recorded · 194 measured · Source: the US BTS 10:00 · 1.9 min · 207 recorded · 207 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 57 recorded · 56 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 24 recorded · 24 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 22 recorded · 22 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 33 recorded · 33 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 153 recorded · 152 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 88 recorded · 88 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 170 recorded · 169 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 137 recorded · 135 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 100 recorded · 99 measured · Source: the US BTS 22:00 · 19.3 min · 203 recorded · 201 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 · 207 · 207 recorded · 204 measured · Source: the US BTS 06:00 · 240 · 240 recorded · 238 measured · Source: the US BTS 07:00 · 10 · 10 recorded · 10 measured · Source: the US BTS 08:00 · 50 · 50 recorded · 50 measured · Source: the US BTS 09:00 · 195 · 195 recorded · 194 measured · Source: the US BTS 10:00 · 207 · 207 recorded · 207 measured · Source: the US BTS 11:00 · 57 · 57 recorded · 56 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · 24 · 24 recorded · 24 measured · Source: the US BTS 14:00 · 22 · 22 recorded · 22 measured · Source: the US BTS 15:00 · 33 · 33 recorded · 33 measured · Source: the US BTS 16:00 · 153 · 153 recorded · 152 measured · Source: the US BTS 17:00 · 88 · 88 recorded · 88 measured · Source: the US BTS 18:00 · 170 · 170 recorded · 169 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · 137 · 137 recorded · 135 measured · Source: the US BTS 21:00 · 100 · 100 recorded · 99 measured · Source: the US BTS 22:00 · 203 · 203 recorded · 201 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———
05:0094.6%0.5 min204207
06:0097.1%-0.3 min238240
07:00Fewer than 200 measured departures—1010
08:00Fewer than 200 measured departures—5050
09:00Fewer than 200 measured departures—194195
10:0090.8%1.9 min207207
11:00Fewer than 200 measured departures—5657
12:00No observations———
13:00Fewer than 200 measured departures—2424
14:00Fewer than 200 measured departures—2222
15:00Fewer than 200 measured departures—3333
16:00Fewer than 200 measured departures—152153
17:00Fewer than 200 measured departures—8888
18:00Fewer than 200 measured departures—169170
19:00No observations———
20:00Fewer than 200 measured departures—135137
21:00Fewer than 200 measured departures—99100
22:0064.2%19.3 min201203
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 81.7% · 292 recorded · 289 measured · Source: the US BTS Tuesday · 90.4% · 292 recorded · 292 measured · Source: the US BTS Wednesday · 84.0% · 292 recorded · 288 measured · Source: the US BTS Thursday · 79.4% · 282 recorded · 282 measured · Source: the US BTS Friday · 83.8% · 284 recorded · 284 measured · Source: the US BTS Saturday · Fewer than 200 measured departures · 166 recorded · 164 measured · Source: the US BTS Sunday · 78.1% · 288 recorded · 283 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 · 7.3 min · 292 recorded · 289 measured · Source: the US BTS Tuesday · -0.0 min · 292 recorded · 292 measured · Source: the US BTS Wednesday · 5.1 min · 292 recorded · 288 measured · Source: the US BTS Thursday · 11.3 min · 282 recorded · 282 measured · Source: the US BTS Friday · 5.4 min · 284 recorded · 284 measured · Source: the US BTS Saturday · Fewer than 200 measured departures · 166 recorded · 164 measured · Source: the US BTS Sunday · 9.8 min · 288 recorded · 283 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 · 292 · 292 recorded · 289 measured · Source: the US BTS Tuesday · 292 · 292 recorded · 292 measured · Source: the US BTS Wednesday · 292 · 292 recorded · 288 measured · Source: the US BTS Thursday · 282 · 282 recorded · 282 measured · Source: the US BTS Friday · 284 · 284 recorded · 284 measured · Source: the US BTS Saturday · 166 · 166 recorded · 164 measured · Source: the US BTS Sunday · 288 · 288 recorded · 283 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday81.7%7.3 min289292
Tuesday90.4%-0.0 min292292
Wednesday84.0%5.1 min288292
Thursday79.4%11.3 min282282
Friday83.8%5.4 min284284
SaturdayFewer than 200 measured departures—164166
Sunday78.1%9.8 min283288

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 · 86.5% · 234 recorded · 230 measured · Source: the US BTS Feb · 88.0% · 208 recorded · 208 measured · Source: the US BTS Mar · Fewer than 200 measured departures · 130 recorded · 126 measured · Source: the US BTS Apr · Fewer than 200 measured departures · 112 recorded · 112 measured · Source: the US BTS May · Fewer than 200 measured departures · 112 recorded · 111 measured · Source: the US BTS Jun · Fewer than 200 measured departures · 112 recorded · 112 measured · Source: the US BTS Jul · Fewer than 200 measured departures · 114 recorded · 114 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 112 recorded · 112 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 112 recorded · 112 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 186 recorded · 186 measured · Source: the US BTS Nov · 89.1% · 224 recorded · 220 measured · Source: the US BTS Dec · 75.3% · 240 recorded · 239 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 · 4.3 min · 234 recorded · 230 measured · Source: the US BTS Feb · 3.5 min · 208 recorded · 208 measured · Source: the US BTS Mar · Fewer than 200 measured departures · 130 recorded · 126 measured · Source: the US BTS Apr · Fewer than 200 measured departures · 112 recorded · 112 measured · Source: the US BTS May · Fewer than 200 measured departures · 112 recorded · 111 measured · Source: the US BTS Jun · Fewer than 200 measured departures · 112 recorded · 112 measured · Source: the US BTS Jul · Fewer than 200 measured departures · 114 recorded · 114 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 112 recorded · 112 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 112 recorded · 112 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 186 recorded · 186 measured · Source: the US BTS Nov · 1.9 min · 224 recorded · 220 measured · Source: the US BTS Dec · 10.4 min · 240 recorded · 239 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 · 234 · 234 recorded · 230 measured · Source: the US BTS Feb · 208 · 208 recorded · 208 measured · Source: the US BTS Mar · 130 · 130 recorded · 126 measured · Source: the US BTS Apr · 112 · 112 recorded · 112 measured · Source: the US BTS May · 112 · 112 recorded · 111 measured · Source: the US BTS Jun · 112 · 112 recorded · 112 measured · Source: the US BTS Jul · 114 · 114 recorded · 114 measured · Source: the US BTS Aug · 112 · 112 recorded · 112 measured · Source: the US BTS Sep · 112 · 112 recorded · 112 measured · Source: the US BTS Oct · 186 · 186 recorded · 186 measured · Source: the US BTS Nov · 224 · 224 recorded · 220 measured · Source: the US BTS Dec · 240 · 240 recorded · 239 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan86.5%4.3 min230234
Feb88.0%3.5 min208208
MarFewer than 200 measured departures—126130
AprFewer than 200 measured departures—112112
MayFewer than 200 measured departures—111112
JunFewer than 200 measured departures—112112
JulFewer than 200 measured departures—114114
AugFewer than 200 measured departures—112112
SepFewer than 200 measured departures—112112
OctFewer than 200 measured departures—186186
Nov89.1%1.9 min220224
Dec75.3%10.4 min239240

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 82.2% 1,558
  • Delayed >15 min 17.1% 324
  • Cancelled 0.7% 14
  • 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

23
23 of 23
Flight numbersBy direction DeparturesOn time
WN372 DSM → STL 123 89.3%
WN2778 STL → DSM 110 80.4%
WN2925 DSM → STL 109 85.1%
WN2269 STL → DSM 104 89.3%
WN2853 DSM → STL 61 98.4%
WN146 STL → DSM 60 71.2%
WN2705 DSM → STL 60 83.1%
WN1004 DSM → STL 58 96.6%
WN1086 DSM → STL 58 91.4%
WN2708 DSM → STL 58 91.4%
WN364 STL → DSM 53 88.7%
WN1911 DSM → STL 50 94.0%
WN1971 STL → DSM 50 63.3%
WN2074 STL → DSM 50 74.0%
WN2702 DSM → STL 46 86.7%
WN1351 STL → DSM 42 75.6%
WN1493 STL → DSM 42 73.8%
WN2391 STL → DSM 42 83.3%
WN2875 STL → DSM 42 73.8%
WN621 DSM → STL 42 71.4%
WN2404 STL → DSM 35 80.0%
WN507 DSM → STL 33 90.9%
WN4144 STL → DSM 30 70.0%

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
March 2026 16 −85.5% 0 68.8%
February 2026 104 +0.0% 0 89.4%
January 2026 116 +1.8% 0 86.2%
December 2025 119 −0.8% 1 74.8%
November 2025 108 −3.6% 4 86.1%
October 2025 114 +58.3% 0 86.0%
September 2025 112 0 85.7%
August 2025 112 0 75.0%
July 2025 114 0 80.7%
June 2025 112 0 82.1%
May 2025 111 1 75.7%
April 2025 112 0 77.7%
March 2025 110 4 85.5%
February 2025 104 0 86.5%
January 2025 114 4 86.8%
December 2024 120 0 75.8%
November 2024 112 0 92.0%
October 2024 72 0 86.1%

How to read this chart

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