FlightRecord

Atlanta (ATL) to Baltimore (BWI): On-Time Performance

Data through July 2026

Atlanta (ATL) to Baltimore (BWI) effectively runs on two schedules. In September 2025, 88% of arrivals were on time; in July 2024 that fell to 55% — a 33-point seasonal swing. Across the full period the route averages 74% on-time against a national 78%. Morning departures also hold up better than evening ones (87% vs 64%), which matters most in the rough months.

On-time
74%
arrived <15 min late
Avg delay
18 min
completed flights
Cancelled
2.0%
Flights/day
15
last 12 months
Duration
1h 48m
scheduled
Distance
577 mi

Best airline from ATL to BWI

4 airlines flew this route regularly between 2024-07 and 2026-07.

AirlineOn-timeAvg delayCancelledFlights
Southwest Airlinesmost reliable79%15 min1.9%3,616
Delta Air Lines76%17 min1.6%5,951
Spirit Airlines68%22 min2.4%616
Frontier Airlines60%30 min3.2%1,676

Monthly on-time trend

Monthly on-time percentage for ATL to BWI flights50%75%100%August 2024: 71% on-time (540 flights)71Aug 2024September 2024: 82% on-time (496 flights)82October 2024: 86% on-time (514 flights)86November 2024: 83% on-time (535 flights)83Nov 2024December 2024: 80% on-time (531 flights)80January 2025: 78% on-time (469 flights)78February 2025: 82% on-time (432 flights)82Feb 2025March 2025: 76% on-time (476 flights)76April 2025: 73% on-time (459 flights)73May 2025: 69% on-time (500 flights)69May 2025June 2025: 55% on-time (496 flights)55July 2025: 61% on-time (508 flights)61August 2025: 74% on-time (493 flights)74Aug 2025September 2025: 88% on-time (465 flights)88October 2025: 81% on-time (501 flights)81November 2025: 80% on-time (469 flights)80Nov 2025December 2025: 69% on-time (433 flights)69January 2026: 77% on-time (379 flights)77February 2026: 76% on-time (346 flights)76Feb 2026March 2026: 69% on-time (414 flights)69April 2026: 82% on-time (440 flights)82May 2026: 76% on-time (486 flights)76May 2026June 2026: 74% on-time (480 flights)74July 2026: 59% on-time (498 flights)59

Best time to fly from ATL to BWI

Aim for departures around 6 a.m. (92% on-time); avoid 9 p.m. departures (57%).

On-time percentage by scheduled departure hour, ATL to BWI5 a.m.: 85% on-time (101 flights)56 a.m.: 92% on-time (333 flights)67 a.m.: 89% on-time (1,071 flights)78 a.m.: 90% on-time (497 flights)89 a.m.: 83% on-time (782 flights)910 a.m.: 84% on-time (408 flights)1011 a.m.: 84% on-time (935 flights)1112 p.m.: 78% on-time (250 flights)121 p.m.: 79% on-time (895 flights)132 p.m.: 73% on-time (664 flights)143 p.m.: 69% on-time (772 flights)154 p.m.: 66% on-time (913 flights)165 p.m.: 67% on-time (626 flights)176 p.m.: 66% on-time (799 flights)187 p.m.: 66% on-time (529 flights)198 p.m.: 65% on-time (504 flights)209 p.m.: 57% on-time (421 flights)2110 p.m.: 62% on-time (1,253 flights)2211 p.m.: 64% on-time (106 flights)23scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday70%22 min
Tuesday79%16 min
Wednesdaybest81%12 min
Thursday76%16 min
Friday73%19 min
Saturday74%18 min
Sunday68%23 min

What causes delays on this route

Share of total delay minutes by cause, as reported by carriers to the US DOT.

  • Late-arriving aircraft38%
  • Airline operations39%
  • National airspace system19%
  • Weather5%

Frequently asked questions

How often are flights from ATL to BWI delayed?
26% of ATL–BWI flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 18 minutes.
Which airline is most reliable from ATL to BWI?
Southwest Airlines has the best on-time record on this route at 79%, based on 3,616 flights. 4 airlines flew ATL–BWI frequently enough to compare in this period.
What is the best time of day to fly from ATL to BWI?
Departures around 6 a.m. have the best record (92% on-time), while departures around 9 p.m. have the worst (57%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
How long is the flight from ATL to BWI?
The scheduled ATL–BWI flight time averages 1h 48m over 577 miles. Actual arrival times vary — flights on this route land 15+ minutes late 26% of the time.
How often are ATL to BWI flights cancelled?
2% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
What is the worst month to fly from ATL to BWI?
July 2024 was the roughest month in this dataset, with only 55% of arrivals on time. The best was September 2025 at 88%. If your dates are flexible, that 33-point gap is worth planning around.

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Based on 11,859 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.