Carrier route record
DLATL→MOB
Delta Air Lines · Atlanta to Mobile
- Flights
- 755
- Period
- July 2025 to June 2026
- Share of route
- 81%
- Carriers
- 2
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on ATL to MOB lands a B, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 755 flights, with a median arrival 9 minutes early.
Set against the rest of the country, Delta's ATL to MOB record is 6 points better than the US average of 77.6%. That gap is worth roughly 56 fewer late arrivals for every thousand flights.
Key figures
On time
83.2%
Arrivals under 15 minutes late, of 736 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
2.38%
National rate is 1.81%
Whole route
79.8%
Every carrier on ATL to MOB, 930 flights
These figures cover 755 flights between July 2025 and June 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.
Carrier by carrier
Delta against every carrier on ATL to MOB
Delta flew 755 of the 930 flights on ATL to MOB, most of the route. Its 83.2% on time is 3 points better than the route as a whole, which runs 79.8%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Delta at 83.2% to SkyWest at 65.5%. 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) | 755 | 83.2% | 78 min | 2.38% | B |
| SkyWest Airlinesthin sample | 175 | 65.5% | 87 min | 0.57% | C+ |
Flight by flight
Delta flight numbers on ATL to MOB
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 17 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am—
- 8am–11am37 flights94.3%
- 11am–2pm186 flights85.2%
- 2pm–5pm98 flights77.1%
- 5pm–8pm157 flights82.5%
- 8pm–5am277 flights82.9%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 94.3% of the time, against 77.1% for the afternoon window. That is 17 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 277 flights scheduled in it.
Across the year
Delta on ATL to MOB through the year
July is the worst month at 72.8% on time, 18 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. July was the busiest month here, with 93 flights.
Across the week, Saturday is the strongest day at 90.2% on time and Friday the weakest at 72.9%. 17 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Delta runs late on this route
One category carries most of the weight here. Carrier accounts for 54% of the 9,609 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 54%Carrier
- 25%Late-arriving aircraft
- 15%National Airspace System
- 6%Extreme weather
The largest share of delay minutes, 54%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 5,210 of the 9,609 delay minutes reported here. The split is drawn from 9,609 reported delay minutes.
Cancellations sit at 2.38% against a national 1.81%, which is ordinary. Diversions add another 0.13%.
Connections and stage length
What a delay here costs
6.9% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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 8am–11am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 86.5% on time across 755 flights, 3 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 3 points of difference.
One caution: this is a thin sample. 755 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. 755 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 83.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 736 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 MOB65.5%
- Delta Air Lines network-wide record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- The best time of day to fly, according to 7.04 million flight records
- Worst months to fly in the US, ranked by the data
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.