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779 km · Domestic

Hartsfield Jackson Atlanta (ATL) – St. Louis Lambert (STL)

In July 2026, 656 flights operated between Hartsfield Jackson Atlanta and St. Louis Lambert (both directions), and 74.4% 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
January492527▲ 7.1%
February494504▲ 2.0%
March557549▼ 1.4%
April554586▲ 5.8%
May588653▲ 11.1%
June649629▼ 3.1%
July697656▼ 5.9%
August652––
September634––
October696–in progress
November550––
December613––
Year to date (Jan–Jul)4,0314,104▲ 1.8%

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
January83.3%85.6%▲ 2.8%
February84.8%84.3%▼ 0.6%
March86.2%76.1%▼ 11.7%
April82.5%82.4%▼ 0.1%
May81.1%80.2%▼ 1.1%
June77.7%81.1%▲ 4.4%
July77.5%74.4%▼ 4.0%
August82.4%––
September91.6%––
October85.5%–in progress
November82.7%––
December78.8%––
Year-to-date average (Jan–Jul)81.9%80.6%▼ 1.6%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January3531▼ 11.4%
February04–
March117▲ 1,600.0%
April512▲ 140.0%
May27▲ 250.0%
June127▼ 41.7%
July54▼ 20.0%
August10––
September0––
October0–in progress
November19––
December9––
Year to date (Jan–Jul)6082▲ 36.7%

Airlines on this route

  1. Delta Air Lines 63.9%
  2. Southwest Airlines 32.4%
  3. Frontier Airlines 3.8%

Oct 1, 2024 – Jul 31, 2026

By direction

ATL → STL

Scheduled flights
6,469
Flights operated
6,382
Cancelled
87 · 1.3%
On-time departures
80.9%

STL → ATL

Scheduled flights
6,500
Flights operated
6,407
Cancelled
93 · 1.4%
On-time departures
84.1%

ATL → STL and STL → ATL counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Delta Air Lines DL 8,284 63.9% 86.3% 124
Southwest Airlines WN 4,196 32.4% 76.5% 48
Frontier Airlines F9 489 3.8% 69.6% 8

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 delay07:00–08:000.3min · 1,251 recorded · 1,234 measured
Gap to highest-delay hour27.6min07:00 ↔ 20:00
Recorded flights12,969ATL–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 · 21 recorded · 21 measured · Source: the US BTS 06:00 · 94.4% · 800 recorded · 788 measured · Source: the US BTS 07:00 · 93.3% · 1,251 recorded · 1,234 measured · Source: the US BTS 08:00 · 91.3% · 1,004 recorded · 989 measured · Source: the US BTS 09:00 · 90.6% · 758 recorded · 744 measured · Source: the US BTS 10:00 · 89.7% · 811 recorded · 799 measured · Source: the US BTS 11:00 · 85.2% · 888 recorded · 877 measured · Source: the US BTS 12:00 · 80.8% · 424 recorded · 421 measured · Source: the US BTS 13:00 · 82.5% · 878 recorded · 869 measured · Source: the US BTS 14:00 · 81.5% · 644 recorded · 636 measured · Source: the US BTS 15:00 · 82.1% · 975 recorded · 964 measured · Source: the US BTS 16:00 · 68.3% · 566 recorded · 558 measured · Source: the US BTS 17:00 · 76.9% · 1,148 recorded · 1,129 measured · Source: the US BTS 18:00 · 78.5% · 670 recorded · 655 measured · Source: the US BTS 19:00 · 67.4% · 714 recorded · 706 measured · Source: the US BTS 20:00 · 59.6% · 603 recorded · 597 measured · Source: the US BTS 21:00 · 74.6% · 230 recorded · 228 measured · Source: the US BTS 22:00 · 82.3% · 316 recorded · 310 measured · Source: the US BTS 23:00 · 78.0% · 268 recorded · 264 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 · 21 recorded · 21 measured · Source: the US BTS 06:00 · 1.1 min · 800 recorded · 788 measured · Source: the US BTS 07:00 · 0.3 min · 1,251 recorded · 1,234 measured · Source: the US BTS 08:00 · 2.7 min · 1,004 recorded · 989 measured · Source: the US BTS 09:00 · 2.5 min · 758 recorded · 744 measured · Source: the US BTS 10:00 · 3.4 min · 811 recorded · 799 measured · Source: the US BTS 11:00 · 5.4 min · 888 recorded · 877 measured · Source: the US BTS 12:00 · 10.3 min · 424 recorded · 421 measured · Source: the US BTS 13:00 · 8.0 min · 878 recorded · 869 measured · Source: the US BTS 14:00 · 7.5 min · 644 recorded · 636 measured · Source: the US BTS 15:00 · 9.8 min · 975 recorded · 964 measured · Source: the US BTS 16:00 · 19.4 min · 566 recorded · 558 measured · Source: the US BTS 17:00 · 13.0 min · 1,148 recorded · 1,129 measured · Source: the US BTS 18:00 · 9.8 min · 670 recorded · 655 measured · Source: the US BTS 19:00 · 18.7 min · 714 recorded · 706 measured · Source: the US BTS 20:00 · 28.0 min · 603 recorded · 597 measured · Source: the US BTS 21:00 · 12.7 min · 230 recorded · 228 measured · Source: the US BTS 22:00 · 9.5 min · 316 recorded · 310 measured · Source: the US BTS 23:00 · 10.9 min · 268 recorded · 264 measured · Source: the US BTS

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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 · 21 · 21 recorded · 21 measured · Source: the US BTS 06:00 · 800 · 800 recorded · 788 measured · Source: the US BTS 07:00 · 1,251 · 1,251 recorded · 1,234 measured · Source: the US BTS 08:00 · 1,004 · 1,004 recorded · 989 measured · Source: the US BTS 09:00 · 758 · 758 recorded · 744 measured · Source: the US BTS 10:00 · 811 · 811 recorded · 799 measured · Source: the US BTS 11:00 · 888 · 888 recorded · 877 measured · Source: the US BTS 12:00 · 424 · 424 recorded · 421 measured · Source: the US BTS 13:00 · 878 · 878 recorded · 869 measured · Source: the US BTS 14:00 · 644 · 644 recorded · 636 measured · Source: the US BTS 15:00 · 975 · 975 recorded · 964 measured · Source: the US BTS 16:00 · 566 · 566 recorded · 558 measured · Source: the US BTS 17:00 · 1,148 · 1,148 recorded · 1,129 measured · Source: the US BTS 18:00 · 670 · 670 recorded · 655 measured · Source: the US BTS 19:00 · 714 · 714 recorded · 706 measured · Source: the US BTS 20:00 · 603 · 603 recorded · 597 measured · Source: the US BTS 21:00 · 230 · 230 recorded · 228 measured · Source: the US BTS 22:00 · 316 · 316 recorded · 310 measured · Source: the US BTS 23:00 · 268 · 268 recorded · 264 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—2121
06:0094.4%1.1 min788800
07:0093.3%0.3 min1,2341,251
08:0091.3%2.7 min9891,004
09:0090.6%2.5 min744758
10:0089.7%3.4 min799811
11:0085.2%5.4 min877888
12:0080.8%10.3 min421424
13:0082.5%8.0 min869878
14:0081.5%7.5 min636644
15:0082.1%9.8 min964975
16:0068.3%19.4 min558566
17:0076.9%13.0 min1,1291,148
18:0078.5%9.8 min655670
19:0067.4%18.7 min706714
20:0059.6%28.0 min597603
21:0074.6%12.7 min228230
22:0082.3%9.5 min310316
23:0078.0%10.9 min264268

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 79.5% · 1,978 recorded · 1,951 measured · Source: the US BTS Tuesday · 87.3% · 1,771 recorded · 1,760 measured · Source: the US BTS Wednesday · 88.5% · 1,777 recorded · 1,771 measured · Source: the US BTS Thursday · 82.4% · 1,983 recorded · 1,970 measured · Source: the US BTS Friday · 82.5% · 1,975 recorded · 1,937 measured · Source: the US BTS Saturday · 83.2% · 1,509 recorded · 1,473 measured · Source: the US BTS Sunday · 75.1% · 1,976 recorded · 1,927 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
Monday · 11.6 min · 1,978 recorded · 1,951 measured · Source: the US BTS Tuesday · 4.3 min · 1,771 recorded · 1,760 measured · Source: the US BTS Wednesday · 2.9 min · 1,777 recorded · 1,771 measured · Source: the US BTS Thursday · 6.9 min · 1,983 recorded · 1,970 measured · Source: the US BTS Friday · 10.2 min · 1,975 recorded · 1,937 measured · Source: the US BTS Saturday · 9.8 min · 1,509 recorded · 1,473 measured · Source: the US BTS Sunday · 13.6 min · 1,976 recorded · 1,927 measured · Source: the US BTS

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Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 1,978 · 1,978 recorded · 1,951 measured · Source: the US BTS Tuesday · 1,771 · 1,771 recorded · 1,760 measured · Source: the US BTS Wednesday · 1,777 · 1,777 recorded · 1,771 measured · Source: the US BTS Thursday · 1,983 · 1,983 recorded · 1,970 measured · Source: the US BTS Friday · 1,975 · 1,975 recorded · 1,937 measured · Source: the US BTS Saturday · 1,509 · 1,509 recorded · 1,473 measured · Source: the US BTS Sunday · 1,976 · 1,976 recorded · 1,927 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday79.5%11.6 min1,9511,978
Tuesday87.3%4.3 min1,7601,771
Wednesday88.5%2.9 min1,7711,777
Thursday82.4%6.9 min1,9701,983
Friday82.5%10.2 min1,9371,975
Saturday83.2%9.8 min1,4731,509
Sunday75.1%13.6 min1,9271,976

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 · 84.5% · 1,085 recorded · 1,019 measured · Source: the US BTS Feb · 84.6% · 1,002 recorded · 998 measured · Source: the US BTS Mar · 81.2% · 1,124 recorded · 1,106 measured · Source: the US BTS Apr · 82.5% · 1,157 recorded · 1,140 measured · Source: the US BTS May · 80.7% · 1,250 recorded · 1,241 measured · Source: the US BTS Jun · 79.3% · 1,297 recorded · 1,278 measured · Source: the US BTS Jul · 76.0% · 1,362 recorded · 1,353 measured · Source: the US BTS Aug · 82.4% · 662 recorded · 652 measured · Source: the US BTS Sep · 91.6% · 634 recorded · 634 measured · Source: the US BTS Oct · 87.9% · 1,069 recorded · 1,069 measured · Source: the US BTS Nov · 86.1% · 1,121 recorded · 1,102 measured · Source: the US BTS Dec · 79.9% · 1,206 recorded · 1,197 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 · 8.3 min · 1,085 recorded · 1,019 measured · Source: the US BTS Feb · 7.3 min · 1,002 recorded · 998 measured · Source: the US BTS Mar · 9.2 min · 1,124 recorded · 1,106 measured · Source: the US BTS Apr · 8.3 min · 1,157 recorded · 1,140 measured · Source: the US BTS May · 8.8 min · 1,250 recorded · 1,241 measured · Source: the US BTS Jun · 11.7 min · 1,297 recorded · 1,278 measured · Source: the US BTS Jul · 15.1 min · 1,362 recorded · 1,353 measured · Source: the US BTS Aug · 7.0 min · 662 recorded · 652 measured · Source: the US BTS Sep · 0.7 min · 634 recorded · 634 measured · Source: the US BTS Oct · 3.3 min · 1,069 recorded · 1,069 measured · Source: the US BTS Nov · 5.5 min · 1,121 recorded · 1,102 measured · Source: the US BTS Dec · 10.8 min · 1,206 recorded · 1,197 measured · Source: the US BTS

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Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 1,085 · 1,085 recorded · 1,019 measured · Source: the US BTS Feb · 1,002 · 1,002 recorded · 998 measured · Source: the US BTS Mar · 1,124 · 1,124 recorded · 1,106 measured · Source: the US BTS Apr · 1,157 · 1,157 recorded · 1,140 measured · Source: the US BTS May · 1,250 · 1,250 recorded · 1,241 measured · Source: the US BTS Jun · 1,297 · 1,297 recorded · 1,278 measured · Source: the US BTS Jul · 1,362 · 1,362 recorded · 1,353 measured · Source: the US BTS Aug · 662 · 662 recorded · 652 measured · Source: the US BTS Sep · 634 · 634 recorded · 634 measured · Source: the US BTS Oct · 1,069 · 1,069 recorded · 1,069 measured · Source: the US BTS Nov · 1,121 · 1,121 recorded · 1,102 measured · Source: the US BTS Dec · 1,206 · 1,206 recorded · 1,197 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan84.5%8.3 min1,0191,085
Feb84.6%7.3 min9981,002
Mar81.2%9.2 min1,1061,124
Apr82.5%8.3 min1,1401,157
May80.7%8.8 min1,2411,250
Jun79.3%11.7 min1,2781,297
Jul76.0%15.1 min1,3531,362
Aug82.4%7.0 min652662
Sep91.6%0.7 min634634
Oct87.9%3.3 min1,0691,069
Nov86.1%5.5 min1,1021,121
Dec79.9%10.8 min1,1971,206

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 81.3% 10,549
  • Delayed >15 min 17.3% 2,240
  • Cancelled 1.4% 180
  • 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

82
82 of 82
Flight numbersBy direction DeparturesOn time
DL1524 STL → ATL 635 94.9%
DL1403 ATL → STL 600 80.9%
DL1571 ATL → STL 578 92.4%
DL1571 STL → ATL 570 93.4%
DL1536 STL → ATL 536 95.1%
DL1485 ATL → STL 510 86.2%
DL1393 ATL → STL 495 79.3%
DL2833 ATL → STL 450 71.9%
DL1485 STL → ATL 445 81.2%
DL1393 STL → ATL 360 78.8%
DL566 STL → ATL 308 86.0%
DL2700 STL → ATL 257 85.8%
F994473 ATL → STL 244 70.8%
DL2700 ATL → STL 237 88.0%
F994474 STL → ATL 219 67.0%
DL1703 STL → ATL 213 88.7%
DL1703 ATL → STL 209 88.0%
DL1400 ATL → STL 208 86.8%
DL1400 STL → ATL 208 86.3%
DL3156 STL → ATL 195 80.0%
DL3156 ATL → STL 195 84.6%
DL566 ATL → STL 151 83.0%
DL1102 ATL → STL 147 84.5%
WN449 ATL → STL 122 93.4%
WN434 ATL → STL 121 76.3%
WN1546 ATL → STL 117 87.6%
WN3678 STL → ATL 93 83.3%
WN779 STL → ATL 91 89.8%
DL543 STL → ATL 84 76.5%
WN2271 STL → ATL 75 83.6%
DL932 ATL → STL 67 89.6%
DL932 STL → ATL 67 94.0%
WN447 ATL → STL 61 83.1%
WN4608 STL → ATL 61 81.7%
WN457 ATL → STL 60 71.7%
WN4609 STL → ATL 60 53.3%
WN1395 ATL → STL 58 51.7%
WN247 ATL → STL 58 94.7%
WN2679 STL → ATL 58 82.5%
WN4427 STL → ATL 58 96.5%
WN2346 STL → ATL 57 79.6%
WN4473 STL → ATL 57 66.7%
WN482 ATL → STL 54 77.4%
WN250 ATL → STL 53 81.1%
DL1341 ATL → STL 52 90.4%
DL1341 STL → ATL 52 94.2%
WN1837 STL → ATL 50 50.0%
WN3882 STL → ATL 50 32.7%
WN4324 ATL → STL 50 92.0%
WN451 ATL → STL 50 68.0%
WN3159 ATL → STL 49 69.4%
WN3937 ATL → STL 48 95.8%
WN1588 STL → ATL 47 88.6%
WN3793 ATL → STL 47 73.9%
WN1469 ATL → STL 43 62.8%
WN459 STL → ATL 43 76.2%
WN1164 ATL → STL 42 85.0%
WN178 STL → ATL 42 100.0%
WN1887 ATL → STL 42 85.7%
WN2082 STL → ATL 42 85.4%
WN378 STL → ATL 42 90.5%
WN406 STL → ATL 42 92.9%
WN457 STL → ATL 42 90.2%
WN770 STL → ATL 42 83.3%
WN999 STL → ATL 42 97.6%
WN2415 STL → ATL 41 73.2%
WN1936 STL → ATL 40 50.0%
DL543 ATL → STL 37 80.6%
WN1938 ATL → STL 35 65.7%
WN240 ATL → STL 34 73.5%
WN241 ATL → STL 34 11.8%
WN3076 ATL → STL 34 42.4%
WN1070 ATL → STL 33 60.6%
WN1941 STL → ATL 33 87.9%
WN2242 STL → ATL 33 51.5%
WN3883 STL → ATL 33 60.6%
WN4535 STL → ATL 33 59.4%
WN2035 STL → ATL 32 71.9%
WN2477 ATL → STL 32 80.7%
WN1231 STL → ATL 31 74.2%
WN2012 STL → ATL 31 83.9%
WN2288 ATL → STL 31 58.1%

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 656 −5.9% 4 74.4%
June 2026 629 −3.1% 7 81.1%
May 2026 653 +11.1% 7 80.2%
April 2026 586 +5.8% 12 82.4%
March 2026 549 −1.4% 17 76.1%
February 2026 504 +2.0% 4 84.3%
January 2026 527 +7.1% 31 85.6%
December 2025 613 +5.0% 9 78.8%
November 2025 550 −0.4% 19 82.7%
October 2025 696 +86.6% 0 85.5%
September 2025 634 0 91.6%
August 2025 652 10 82.4%
July 2025 697 5 77.5%
June 2025 649 12 77.7%
May 2025 588 2 81.1%
April 2025 554 5 82.5%
March 2025 557 1 86.2%
February 2025 494 0 84.8%
January 2025 492 35 83.3%
December 2024 584 0 81.0%
November 2024 552 0 89.5%
October 2024 373 0 92.5%

How to read this chart

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