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1,856 km · Domestic

Salt Lake City (SLC) – St. Louis Lambert (STL)

In July 2026, 184 flights operated between Salt Lake City and St. Louis Lambert (both directions), and 87.0% 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
January129121▼ 6.2%
February1301300.0%
March158171▲ 8.2%
April152172▲ 13.2%
May1721720.0%
June177180▲ 1.7%
July1841840.0%
August175––
September162––
October176–in progress
November166––
December156––
Year to date (Jan–Jul)1,1021,130▲ 2.5%

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
January84.5%86.8%▲ 2.7%
February87.7%76.9%▼ 12.3%
March90.5%90.1%▼ 0.4%
April86.8%83.1%▼ 4.3%
May87.2%91.3%▲ 4.7%
June84.7%80.6%▼ 4.8%
July85.3%87.0%▲ 2.0%
August86.3%––
September83.3%––
October88.1%–in progress
November82.5%––
December80.1%––
Year-to-date average (Jan–Jul)86.7%85.1%▼ 1.8%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January330.0%
February00–
March23▲ 50.0%
April00–
May02–
June30▼ 100.0%
July02–
August1––
September2––
October0–in progress
November0––
December2––
Year to date (Jan–Jul)810▲ 25.0%

Airlines on this route

  1. Delta Air Lines 98.9%
  2. Southwest Airlines 1.0%
  3. SkyWest Airlines 0.1%

Oct 1, 2024 – Jul 31, 2026

By direction

SLC → STL

Scheduled flights
1,752
Flights operated
1,743
Cancelled
9 · 0.5%
On-time departures
83.3%

STL → SLC

Scheduled flights
1,752
Flights operated
1,738
Cancelled
14 · 0.8%
On-time departures
89.2%

SLC → STL and STL → SLC counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Delta Air Lines DL 3,466 98.9% 86.3% 23
Southwest Airlines WN 34 1.0% 79.4% 0
SkyWest Airlines OO 4 0.1% 100.0% 0

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 delay07:00–08:00-0.8min · 500 recorded · 497 measured
Gap to highest-delay hour10.5min07:00 ↔ 20:00
Recorded flights3,504SLC–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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 104 recorded · 104 measured · Source: the US BTS 07:00 · 93.0% · 500 recorded · 497 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 55 recorded · 54 measured · Source: the US BTS 09:00 · 89.5% · 633 recorded · 631 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 19 recorded · 19 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 14 recorded · 14 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 7 recorded · 7 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 121 recorded · 119 measured · Source: the US BTS 14:00 · 85.8% · 691 recorded · 684 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 108 recorded · 108 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 9 recorded · 9 measured · Source: the US BTS 17:00 · 88.1% · 381 recorded · 379 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 151 recorded · 150 measured · Source: the US BTS 19:00 · 84.0% · 267 recorded · 263 measured · Source: the US BTS 20:00 · 75.9% · 412 recorded · 411 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 32 recorded · 32 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 104 recorded · 104 measured · Source: the US BTS 07:00 · -0.8 min · 500 recorded · 497 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 55 recorded · 54 measured · Source: the US BTS 09:00 · 2.0 min · 633 recorded · 631 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 19 recorded · 19 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 14 recorded · 14 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 7 recorded · 7 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 121 recorded · 119 measured · Source: the US BTS 14:00 · 4.8 min · 691 recorded · 684 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 108 recorded · 108 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 9 recorded · 9 measured · Source: the US BTS 17:00 · 5.6 min · 381 recorded · 379 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 151 recorded · 150 measured · Source: the US BTS 19:00 · 8.7 min · 267 recorded · 263 measured · Source: the US BTS 20:00 · 9.7 min · 412 recorded · 411 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 32 recorded · 32 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 104 · 104 recorded · 104 measured · Source: the US BTS 07:00 · 500 · 500 recorded · 497 measured · Source: the US BTS 08:00 · 55 · 55 recorded · 54 measured · Source: the US BTS 09:00 · 633 · 633 recorded · 631 measured · Source: the US BTS 10:00 · 19 · 19 recorded · 19 measured · Source: the US BTS 11:00 · 14 · 14 recorded · 14 measured · Source: the US BTS 12:00 · 7 · 7 recorded · 7 measured · Source: the US BTS 13:00 · 121 · 121 recorded · 119 measured · Source: the US BTS 14:00 · 691 · 691 recorded · 684 measured · Source: the US BTS 15:00 · 108 · 108 recorded · 108 measured · Source: the US BTS 16:00 · 9 · 9 recorded · 9 measured · Source: the US BTS 17:00 · 381 · 381 recorded · 379 measured · Source: the US BTS 18:00 · 151 · 151 recorded · 150 measured · Source: the US BTS 19:00 · 267 · 267 recorded · 263 measured · Source: the US BTS 20:00 · 412 · 412 recorded · 411 measured · Source: the US BTS 21:00 · 32 · 32 recorded · 32 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———
05:00No observations———
06:00Fewer than 200 measured departures—104104
07:0093.0%-0.8 min497500
08:00Fewer than 200 measured departures—5455
09:0089.5%2.0 min631633
10:00Fewer than 200 measured departures—1919
11:00Fewer than 200 measured departures—1414
12:00Fewer than 200 measured departures—77
13:00Fewer than 200 measured departures—119121
14:0085.8%4.8 min684691
15:00Fewer than 200 measured departures—108108
16:00Fewer than 200 measured departures—99
17:0088.1%5.6 min379381
18:00Fewer than 200 measured departures—150151
19:0084.0%8.7 min263267
20:0075.9%9.7 min411412
21:00Fewer than 200 measured departures—3232
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 · 87.2% · 532 recorded · 530 measured · Source: the US BTS Tuesday · 89.3% · 494 recorded · 494 measured · Source: the US BTS Wednesday · 88.8% · 498 recorded · 498 measured · Source: the US BTS Thursday · 85.9% · 522 recorded · 517 measured · Source: the US BTS Friday · 84.2% · 522 recorded · 518 measured · Source: the US BTS Saturday · 85.3% · 416 recorded · 415 measured · Source: the US BTS Sunday · 83.1% · 520 recorded · 509 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 · 4.5 min · 532 recorded · 530 measured · Source: the US BTS Tuesday · -0.7 min · 494 recorded · 494 measured · Source: the US BTS Wednesday · 4.1 min · 498 recorded · 498 measured · Source: the US BTS Thursday · 7.8 min · 522 recorded · 517 measured · Source: the US BTS Friday · 2.8 min · 522 recorded · 518 measured · Source: the US BTS Saturday · 10.6 min · 416 recorded · 415 measured · Source: the US BTS Sunday · 5.5 min · 520 recorded · 509 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 · 532 · 532 recorded · 530 measured · Source: the US BTS Tuesday · 494 · 494 recorded · 494 measured · Source: the US BTS Wednesday · 498 · 498 recorded · 498 measured · Source: the US BTS Thursday · 522 · 522 recorded · 517 measured · Source: the US BTS Friday · 522 · 522 recorded · 518 measured · Source: the US BTS Saturday · 416 · 416 recorded · 415 measured · Source: the US BTS Sunday · 520 · 520 recorded · 509 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday87.2%4.5 min530532
Tuesday89.3%-0.7 min494494
Wednesday88.8%4.1 min498498
Thursday85.9%7.8 min517522
Friday84.2%2.8 min518522
Saturday85.3%10.6 min415416
Sunday83.1%5.5 min509520

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 · 85.6% · 256 recorded · 250 measured · Source: the US BTS Feb · 82.3% · 260 recorded · 260 measured · Source: the US BTS Mar · 90.3% · 334 recorded · 329 measured · Source: the US BTS Apr · 84.9% · 324 recorded · 324 measured · Source: the US BTS May · 89.2% · 346 recorded · 344 measured · Source: the US BTS Jun · 82.6% · 360 recorded · 357 measured · Source: the US BTS Jul · 86.1% · 370 recorded · 368 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 176 recorded · 175 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 164 recorded · 162 measured · Source: the US BTS Oct · 89.6% · 280 recorded · 280 measured · Source: the US BTS Nov · 88.5% · 330 recorded · 330 measured · Source: the US BTS Dec · 84.1% · 304 recorded · 302 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 · 6.1 min · 256 recorded · 250 measured · Source: the US BTS Feb · 13.4 min · 260 recorded · 260 measured · Source: the US BTS Mar · 4.1 min · 334 recorded · 329 measured · Source: the US BTS Apr · 4.2 min · 324 recorded · 324 measured · Source: the US BTS May · 1.5 min · 346 recorded · 344 measured · Source: the US BTS Jun · 7.4 min · 360 recorded · 357 measured · Source: the US BTS Jul · 4.1 min · 370 recorded · 368 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 176 recorded · 175 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 164 recorded · 162 measured · Source: the US BTS Oct · 0.3 min · 280 recorded · 280 measured · Source: the US BTS Nov · 1.4 min · 330 recorded · 330 measured · Source: the US BTS Dec · 7.4 min · 304 recorded · 302 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 · 250 measured · Source: the US BTS Feb · 260 · 260 recorded · 260 measured · Source: the US BTS Mar · 334 · 334 recorded · 329 measured · Source: the US BTS Apr · 324 · 324 recorded · 324 measured · Source: the US BTS May · 346 · 346 recorded · 344 measured · Source: the US BTS Jun · 360 · 360 recorded · 357 measured · Source: the US BTS Jul · 370 · 370 recorded · 368 measured · Source: the US BTS Aug · 176 · 176 recorded · 175 measured · Source: the US BTS Sep · 164 · 164 recorded · 162 measured · Source: the US BTS Oct · 280 · 280 recorded · 280 measured · Source: the US BTS Nov · 330 · 330 recorded · 330 measured · Source: the US BTS Dec · 304 · 304 recorded · 302 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan85.6%6.1 min250256
Feb82.3%13.4 min260260
Mar90.3%4.1 min329334
Apr84.9%4.2 min324324
May89.2%1.5 min344346
Jun82.6%7.4 min357360
Jul86.1%4.1 min368370
AugFewer than 200 measured departures—175176
SepFewer than 200 measured departures—162164
Oct89.6%0.3 min280280
Nov88.5%1.4 min330330
Dec84.1%7.4 min302304

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 85.7% 3,002
  • Delayed >15 min 13.7% 479
  • Cancelled 0.7% 23
  • 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

8
8 of 8
Flight numbersBy direction DeparturesOn time
DL2363 STL → SLC 658 91.9%
DL2666 SLC → STL 622 78.4%
DL2455 SLC → STL 561 89.8%
DL1492 STL → SLC 486 86.0%
DL2455 STL → SLC 463 88.9%
DL1492 SLC → STL 307 77.3%
DL2421 SLC → STL 205 87.6%
DL2421 STL → SLC 92 94.6%

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 184 +0.0% 2 87.0%
June 2026 180 +1.7% 0 80.6%
May 2026 172 +0.0% 2 91.3%
April 2026 172 +13.2% 0 83.1%
March 2026 171 +8.2% 3 90.1%
February 2026 130 +0.0% 0 76.9%
January 2026 121 −6.2% 3 86.8%
December 2025 156 +6.8% 2 80.1%
November 2025 166 +1.2% 0 82.5%
October 2025 176 +69.2% 0 88.1%
September 2025 162 2 83.3%
August 2025 175 1 86.3%
July 2025 184 0 85.3%
June 2025 177 3 84.7%
May 2025 172 0 87.2%
April 2025 152 0 86.8%
March 2025 158 2 90.5%
February 2025 130 0 87.7%
January 2025 129 3 84.5%
December 2024 146 0 88.4%
November 2024 164 0 94.5%
October 2024 104 0 92.3%

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