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Route · ATL → STL · 2020–2025 BTS data

Atlanta to St. Louis

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), ATL to STL (Atlanta to St. Louis) ranks #378 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

84.3%
On-time
+5.3 pts
vs US avg
59 min
Delay when late
19,027
Flights
#378 of 4927
Corpus placement

Cancelled

1.0%

Best Month

Oct 2024 93%

Worst Month

Jul 2024 67%

Distance

484 mi

Carriers

6

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 311 64 4 0 DL,WN,F9
Nov 2025 285 52 10 0 DL,F9,WN
Oct 2025 348 50 0 0 WN,DL,F9
Sep 2025 317 24 0 1 WN,DL,F9
Aug 2025 331 55 5 2 WN,F9,DL
Jul 2025 351 75 3 2 DL,WN,F9
Jun 2025 330 83 7 0 DL,WN,F9
May 2025 288 68 1 0 DL,WN
Apr 2025 274 55 2 0 DL,WN
Mar 2025 276 48 1 1 DL,WN
Feb 2025 247 35 0 0 DL,WN
Jan 2025 263 57 17 1 DL,WN
Dec 2024 292 61 0 0 DL,WN
Nov 2024 276 32 0 0 WN,DL
Oct 2024 296 21 0 0 DL,WN
Sep 2024 284 30 0 0 WN,DL
Aug 2024 299 51 1 0 DL,WN
Jul 2024 298 99 14 3 DL,WN
Jun 2024 294 49 0 0 DL,WN
May 2024 313 85 0 0 DL,WN
Apr 2024 294 54 0 1 DL,WN
Mar 2024 284 44 0 1 DL,WN
Feb 2024 240 20 0 1 DL,WN
Jan 2024 256 59 3 0 DL,WN

ATL–STL seasonal on-time pattern

Best: September (91.0%) · weakest: July (77.6%)

75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 81.5%

Strongest calendar month

September

91.0% on-time · ~271 flights/mo

Busiest calendar month

October

~287 flights/mo avg

Weakest calendar month

July

77.6% on-time · ~278 flights/mo

Cancellation Rate

1.0%

68 of 7,047 flights

Diversion Rate

0.2%

13 of 7,047 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

ATL - Atlanta

Full on-time, delay-cause, and seasonal performance for Atlanta, GA.

ATL on-time profile

STL - St. Louis

Full on-time, delay-cause, and seasonal performance for St. Louis, MO.

STL on-time profile

Compare the two airports

See ATL and STL side by side on delays, cancellations, and reliability.

Compare ATL vs STL

Origin-hub reliability standing

Mid-pack among ATL departures

From ATL, this corridor sits with 75 other 75–85% on-time routes out of 144 tracked departures, not the hub's reliability leaders (67 at ≥85%) and not the softest ( 2 below 75%). Destination: St. Louis · fleet on-time rank #1464 of 4927.

What the Data Says About ATL to STL

Bureau of Transportation Statistics records show Atlanta to St. Louis (ATL to STL) running a 84.3% on-time rate over 19,027 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 59.3 minutes. The 484-mile corridor is served by 6 carriers, and over the last 24 months 1.0% of 7,047 flights were cancelled, 0.2% diverted.

The monthly split is wide on this route: Oct 2024 posted the strongest performance at 93% on-time, while Jul 2024 came in at just 67% - a 26-point swing worth factoring into travel timing.

On the multi-year calendar, ATL–STL peaks in September at 91.0% on-time while October carries the heaviest traffic (~287 flights per month) ; the softest month is July at 77.6%, a 13.4-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does ATL to STL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, ATL to STL ranks #378 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from ATL to STL? ▼
Flights from Atlanta to St. Louis have a 84.3% on-time rate based on 19,027 flights. The average delay is 59.3 minutes. The best recent month was Oct 2024 with 93% on-time.
What is the cancellation rate for ATL to STL? ▼
Over the last 24 months, 1.0% of flights on this route were cancelled (68 of 7,047 flights) and 0.2% were diverted.
How far is the flight from ATL to STL? ▼
The flight distance from Atlanta (ATL) to St. Louis (STL) is approximately 484 miles. This route is served by 6 carriers.
When is the best time to fly from ATL to STL? ▼
The best recent month for on-time performance was Oct 2024 (93% on-time). The worst was Jul 2024 (67% on-time). Consider booking during months with historically better performance.

Airports on this route

ATL Airport

Atlanta
STL Airport

St. Louis
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using ATL–STL data

ATL–STL runs 5.3 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare ATL and STL airport profiles: delay causes and top routes differ even on the same corridor. ATL airport
  • If your dates flex, September (91.0% on-time) beats July (77.6%) on this corridor. Seasonal chart
  • 4 other routes post a similar 84.3% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.