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Route · MDT → ATL · 2020–2025 BTS data

Harrisburg to Atlanta

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), MDT to ATL (Harrisburg to Atlanta) ranks #2341 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

88%
On-time
+9 pts
vs US avg
83 min
Delay when late
5,387
Flights
#2341 of 4927
Corpus placement

Cancelled

1.0%

Best Month

Oct 2024 95%

Worst Month

Jan 2025 68%

Distance

620 mi

Carriers

8

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 56 12 0 0 DL
Nov 2025 83 10 1 0 DL
Oct 2025 88 17 0 0 DL
Sep 2025 81 6 0 0 DL
Aug 2025 84 9 2 1 DL
Jul 2025 88 16 0 0 DL
Jun 2025 85 18 2 2 OO,DL
May 2025 87 12 1 0 OO,DL
Apr 2025 86 11 0 1 DL
Mar 2025 86 7 0 0 DL
Feb 2025 77 22 0 0 DL
Jan 2025 59 19 4 0 DL
Dec 2024 88 20 0 0 9E,DL
Nov 2024 82 9 0 0 DL,9E
Oct 2024 84 4 0 0 DL
Sep 2024 81 8 0 0 DL
Aug 2024 85 9 0 0 DL
Jul 2024 85 18 5 1 DL
Jun 2024 84 7 0 0 DL
May 2024 88 15 1 1 9E,DL
Apr 2024 86 7 0 1 9E,DL
Mar 2024 88 7 0 0 9E,DL
Feb 2024 70 6 1 0 9E
Jan 2024 75 13 2 1 9E,DL

MDT–ATL seasonal on-time pattern

Best: September (93.5%) · weakest: January (81.8%)

80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 84.8%

Strongest calendar month

September

93.5% on-time · ~72 flights/mo

Busiest calendar month

May

~87 flights/mo avg

Weakest calendar month

January

81.8% on-time · ~74 flights/mo

Cancellation Rate

1.0%

19 of 1,956 flights

Diversion Rate

0.4%

8 of 1,956 flights

Explore origin & destination

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

MDT - Harrisburg

Full on-time, delay-cause, and seasonal performance for Harrisburg, PA.

MDT 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 MDT and ATL side by side on delays, cancellations, and reliability.

Compare MDT vs ATL

Origin-hub reliability standing

Among MDT's stronger departures

MDT → ATL posts a 88% on-time rate, landing in the ≥85% band with 5 of 6 BTS-tracked routes leaving Harrisburg. The same hub also shows 1 mid-band and 0 challenged departures · fleet-wide on-time rank #416 of 4927 (highest on-time = #1).

What the Data Says About MDT to ATL

Harrisburg to Atlanta (MDT to ATL) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 88% on-time rate across 5,387 flights, with delays that do happen averaging 83.3 minutes. The corridor runs roughly 620 miles and is served by 8 carriers. Over the most recent 24 months, 19 of 1,956 flights were cancelled (1.0%) and 8 diverted (0.4%).

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

On the multi-year calendar, MDT–ATL peaks in September at 93.5% on-time while May carries the heaviest traffic (~87 flights per month) ; the softest month is January at 81.8%, a 11.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does MDT to ATL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, MDT to ATL ranks #2341 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 MDT to ATL? ▼
Flights from Harrisburg to Atlanta have a 88% on-time rate based on 5,387 flights. The average delay is 83.3 minutes. The best recent month was Oct 2024 with 95% on-time.
What is the cancellation rate for MDT to ATL? ▼
Over the last 24 months, 1.0% of flights on this route were cancelled (19 of 1,956 flights) and 0.4% were diverted.
How far is the flight from MDT to ATL? ▼
The flight distance from Harrisburg (MDT) to Atlanta (ATL) is approximately 620 miles. This route is served by 8 carriers.
When is the best time to fly from MDT to ATL? ▼
The best recent month for on-time performance was Oct 2024 (95% on-time). The worst was Jan 2025 (68% on-time). Consider booking during months with historically better performance.

Airports on this route

MDT Airport

Harrisburg
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 MDT–ATL data

MDT–ATL runs 9 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare MDT and ATL airport profiles: delay causes and top routes differ even on the same corridor. MDT airport
  • If your dates flex, September (93.5% on-time) beats January (81.8%) on this corridor. Seasonal chart
  • 4 other routes post a similar 88% 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.