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Route · STL → ATL · 2020–2025 BTS data

St. Louis to Atlanta

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), STL to ATL (St. Louis to Atlanta) ranks #373 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

86.9%
On-time
+7.9 pts
vs US avg
69 min
Delay when late
19,051
Flights
#373 of 4927
Corpus placement

Cancelled

1.0%

Best Month

Sep 2025 95%

Worst Month

Jul 2024 68%

Distance

484 mi

Carriers

6

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 311 59 5 1 DL,WN,F9
Nov 2025 284 43 9 2 DL,F9,WN
Oct 2025 348 34 0 2 WN,DL,F9
Sep 2025 317 16 0 0 WN,DL,F9
Aug 2025 331 42 5 1 WN,F9,DL
Jul 2025 351 65 2 1 DL,WN,F9
Jun 2025 331 64 5 2 DL,WN,F9
May 2025 302 61 1 0 DL,WN
Apr 2025 285 41 3 1 DL,WN
Mar 2025 282 39 0 1 DL,WN
Feb 2025 247 39 0 1 DL,WN
Jan 2025 264 29 18 0 DL,WN
Dec 2024 292 52 0 0 DL,WN
Nov 2024 276 25 0 0 WN,DL
Oct 2024 294 16 1 0 WN,DL
Sep 2024 285 34 1 1 WN,DL
Aug 2024 299 29 1 1 DL,WN
Jul 2024 298 95 14 1 DL,WN
Jun 2024 294 37 1 0 DL,WN
May 2024 313 64 0 1 DL,WN
Apr 2024 295 33 0 0 DL,WN
Mar 2024 290 39 1 0 DL,WN
Feb 2024 248 28 0 0 DL,WN
Jan 2024 264 52 3 2 DL,WN

STL–ATL seasonal on-time pattern

Best: September (92.3%) · weakest: July (78.6%)

75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 84.6%

Strongest calendar month

September

92.3% on-time · ~270 flights/mo

Busiest calendar month

October

~288 flights/mo avg

Weakest calendar month

July

78.6% on-time · ~279 flights/mo

Cancellation Rate

1.0%

70 of 7,101 flights

Diversion Rate

0.3%

18 of 7,101 flights

Explore origin & destination

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

STL - St. Louis

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

STL on-time profile

ATL - Atlanta

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

ATL on-time profile

Compare the two airports

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

Compare STL vs ATL

Origin-hub reliability standing

Among STL's stronger departures

STL → ATL posts a 86.9% on-time rate, landing in the ≥85% band with 5 of 51 BTS-tracked routes leaving St. Louis. The same hub also shows 45 mid-band and 1 challenged departures · fleet-wide on-time rank #664 of 4927 (highest on-time = #1).

What the Data Says About STL to ATL

St. Louis to Atlanta (STL to ATL) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 86.9% on-time rate across 19,051 flights, with delays that do happen averaging 68.5 minutes. The corridor runs roughly 484 miles and is served by 6 carriers. Over the most recent 24 months, 70 of 7,101 flights were cancelled (1.0%) and 18 diverted (0.3%).

The monthly split is wide on this route: Sep 2025 posted the strongest performance at 95% on-time, while Jul 2024 came in at just 68% - a 27-point swing worth factoring into travel timing.

On the multi-year calendar, STL–ATL peaks in September at 92.3% on-time while October carries the heaviest traffic (~288 flights per month) ; the softest month is July at 78.6%, a 13.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does STL to ATL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, STL to ATL ranks #373 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 STL to ATL? ▼
Flights from St. Louis to Atlanta have a 86.9% on-time rate based on 19,051 flights. The average delay is 68.5 minutes. The best recent month was Sep 2025 with 95% on-time.
What is the cancellation rate for STL to ATL? ▼
Over the last 24 months, 1.0% of flights on this route were cancelled (70 of 7,101 flights) and 0.3% were diverted.
How far is the flight from STL to ATL? ▼
The flight distance from St. Louis (STL) to Atlanta (ATL) is approximately 484 miles. This route is served by 6 carriers.
When is the best time to fly from STL to ATL? ▼
The best recent month for on-time performance was Sep 2025 (95% on-time). The worst was Jul 2024 (68% on-time). Consider booking during months with historically better performance.

Airports on this route

STL Airport

St. Louis
ATL Airport

Atlanta
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 STL–ATL data

STL–ATL runs 7.9 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare STL and ATL airport profiles: delay causes and top routes differ even on the same corridor. STL airport
  • If your dates flex, September (92.3% on-time) beats July (78.6%) on this corridor. Seasonal chart
  • 4 other routes post a similar 86.9% 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.