Carrier route record
DLMOB→ATL
Delta Air Lines · Mobile to Atlanta
- 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 MOB to ATL earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 780 flights, with a median arrival 16 minutes early.
Set against the rest of the country, Delta's MOB to ATL record is 8 points better than the US average of 77.3%. That gap is worth roughly 79 fewer late arrivals for every thousand flights.
Key figures
On time
85.2%
Arrivals under 15 minutes late, of 761 completed flights
Avg delay
90 min
Across delayed arrivals only, not all flights
Cancelled
2.18%
National rate is 1.89%
Whole route
83.3%
Every carrier on MOB to ATL, 926 flights
These figures cover 780 flights between September 2025 and August 2026. The median arrival is 16 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.
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Carrier by carrier
Delta against every carrier on MOB to ATL
Delta flew 780 of the 926 flights on MOB to ATL, most of the route. Its 85.2% on time is 2 points better than the route as a whole, which runs 83.3%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Delta at 85.2% to SkyWest at 73.6%. 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 | 85.2% | 90 min | 2.18% | A |
| SkyWest Airlinesthin sample | 146 | 73.6% | 102 min | 1.37% | C |
Flight by flight
Delta flight numbers on MOB to ATL
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 matters more here than the choice of carrier. The gap between the best and worst window is 27 points, against half a point between the best and worst carrier.
- 5am–8am277 flights93.3%
- 8am–11am29 flights—
- 11am–2pm177 flights86.8%
- 2pm–5pm97 flights66.3%
- 5pm–8pm200 flights80.6%
- 8pm–5am—
Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 93.3% of the time, against 66.3% for the afternoon window. That is 27 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 277 flights scheduled in it.
Across the year
Delta on MOB to ATL through the year
July is the worst month at 75.0% on time, 16 points below April, the best at 91.4%. 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, Wednesday is the strongest day at 88.7% on time and Tuesday the weakest at 82.5%, a spread of 6 points.
Arrival by arrival
How late Delta on MOB to ATL runs when it is late
Delta on MOB to ATL often beats the schedule: 395 of 761 completed flights, 52%, arrived 15 minutes or more early. The 113 late arrivals split 32 under half an hour, 35 between 30 and 60 minutes, and 46 an hour or more.
- 15+ min early395 flights51.9%
- Within 15 min253 flights33.2%
- 15–29 min late32 flights4.2%
- 30–59 min late35 flights4.6%
- 1–2 hours late29 flights3.8%
- 2+ hours late17 flights2.2%
Scale runs 0% to 100%.
Share of 761 completed flights by arrival against schedule.
17 of 117 late departures made up the time and arrived on time, 15% of them. Only 13 left on time and still arrived late.
The worst days
Worst days for Delta on MOB to ATL
The latest arrival of the period was on 18 August 2026, 15 hours 45 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 August 2026 | 15 hours 45 minutes | Carrier |
| 2 December 2025 | 14 hours 28 minutes | Carrier |
| 23 August 2026 | 9 hours 28 minutes | Carrier |
| 3 March 2026 | 7 hours 12 minutes | Carrier |
| 11 August 2026 | 4 hours 58 minutes | Late-arriving aircraft |
Delay causes
Why Delta runs late on this route
Carrier accounts for 45% of the 10,000 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 42%Late-arriving aircraft
- 11%National Airspace System
- 2%Extreme weather
42% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 10,000 reported delay minutes here, that single category outweighs weather by 20 to one. The split is drawn from 10,174 reported delay minutes.
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 4,550 of the 10,000 delay minutes reported here.
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
6.0% 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 an hour and a half, 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 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 81.5% on time across 780 flights, 4 points below 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 MOB to ATL
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 85.2% 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
- MOB to ATL, every carrier
- Delta on ATL to MOB, the return leg
- SkyWest Airlines on MOB to ATL73.6%
- Delta Air Lines network-wide record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
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.