Carrier route record
DLATL→MOB
Delta Air Lines · Atlanta to Mobile
- Flights
- 780
- Period
- September 2025 to August 2026
- Share of route
- 84%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on ATL to MOB lands a B, 4 points better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 780 flights, with a median arrival 9 minutes early.
Set against the rest of the country, Delta's ATL to MOB record is 4 points better than the US average of 77.3%. That gap is worth roughly 42 fewer late arrivals for every thousand flights.
Key figures
On time
81.5%
Arrivals under 15 minutes late, of 761 completed flights
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
2.18%
National rate is 1.89%
Whole route
79.2%
Every carrier on ATL to MOB, 926 flights
These figures cover 780 flights between September 2025 and August 2026. The median arrival is 9 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
Delta against every carrier on ATL to MOB
Delta flew 780 of the 926 flights on ATL to MOB, most of the route. Its 81.5% on time is 2 points better than the route as a whole, which runs 79.2%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Delta at 81.5% to SkyWest at 67.6%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines (this page) | 780 | 81.5% | 70 min | 2.18% | B |
| SkyWest Airlinesthin sample | 146 | 67.6% | 93 min | 0.68% | C+ |
Flight by flight
Delta flight numbers on ATL to MOB
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Delta runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 780 flights.
- 5am–8am—
- 8am–11am29 flights—
- 11am–2pm180 flights85.3%
- 2pm–5pm114 flights78.4%
- 5pm–8pm181 flights78.1%
- 8pm–5am276 flights81.3%
Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 11am–2pm slot at 85.3% on time, ahead of 5pm–8pm at 78.1%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 8pm–5am window is the busiest, with 276 flights scheduled in it.
Across the year
Delta on ATL to MOB through the year
July is the worst month at 60.0% on time, 31 points below April, the best at 91.2%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. August was the busiest month here, with 116 flights.
Across the week, Saturday is the strongest day at 86.4% on time and Friday the weakest at 74.1%, a spread of 12 points.
Arrival by arrival
How late Delta on ATL to MOB runs when it is late
Delta on ATL to MOB often beats the schedule: 219 of 761 completed flights, 29%, arrived 15 minutes or more early. The 141 late arrivals split 44 under half an hour, 39 between 30 and 60 minutes, and 58 an hour or more.
- 15+ min early219 flights28.8%
- Within 15 min401 flights52.7%
- 15–29 min late44 flights5.8%
- 30–59 min late39 flights5.1%
- 1–2 hours late42 flights5.5%
- 2+ hours late16 flights2.1%
Scale runs 0% to 100%.
Share of 761 completed flights by arrival against schedule.
28 of 155 late departures made up the time and arrived on time, 18% of them. Only 14 left on time and still arrived late.
The worst days
Worst days for Delta on ATL to MOB
The latest arrival of the period was on 27 February 2026, 10 hours 42 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across February, August, June and July, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 February 2026 | 10 hours 42 minutes | National Airspace System |
| 25 February 2026 | 8 hours 29 minutes | Carrier |
| 11 August 2026 | 5 hours 30 minutes | Extreme weather |
| 18 June 2026 | 4 hours 38 minutes | Late-arriving aircraft |
| 11 July 2026 | 4 hours 27 minutes | Late-arriving aircraft |
Delay causes
Why Delta runs late on this route
Carrier accounts for 42% of the 9,923 delay minutes carriers reported here, and the remaining four split what is left.
- 42%Carrier
- 32%Late-arriving aircraft
- 17%National Airspace System
- 9%Extreme weather
The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 4,191 of the 9,923 delay minutes reported here. The split is drawn from 9,923 reported delay minutes.
Cancellations sit at 2.18% against a national 1.89%, which is ordinary. Diversions add another 0.26%.
Connections and stage length
What a delay here costs
7.6% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
At 302 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 11am–2pm window matters as much as it does.
The return leg is a different operation and performs like one: it runs 85.2% on time across 780 flights, 4 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 4 points of difference.
One caution: this is a thin sample. 780 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking Delta on ATL to MOB
Put together: treat all of this as provisional. 780 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 81.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 761 completed flights over 12 months sit behind that.
Related
Where to go next
- ATL to MOB, every carrier
- Delta on MOB to ATL, the return leg
- SkyWest Airlines on ATL to MOB67.6%
- Delta Air Lines network-wide record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Worst months to fly in the US, ranked by the data
- How to read this site: grades, sample sizes, and honest caveats
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.