Flight number record
DL 1727
Delta Air Lines · Tallahassee to Atlanta
- Route
- TLH → ATL
- Departs
- 07:00
- Flights
- 355
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1727, check with Delta Air Lines.
DL 1727 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 355 flights, with a median arrival 15 minutes early.
Set against the rest of the country, DL 1727's record is 16 points better than the US average of 77.3%. That gap is worth roughly 156 fewer late arrivals for every thousand flights.
Key figures
On time
92.9%
Arrivals under 15 minutes late, of 351 completed flights
Avg delay
124 min
Across delayed arrivals only, not all flights
Cancelled
1.13%
National rate is 1.89%
1 hour+ late
4.0%
National rate is 8.3%
These figures cover 355 flights between September 2025 and August 2026. The median arrival is 15 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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Schedule
When DL 1727 flies
DL 1727 flies TLH to ATL without a single fixed slot. Its most common scheduled departure was 07:00, used on 85 of 355 flights, with 05:30 (62 flights) and 06:00 (45 flights) next.
- Departs 07:0085 flights23.9%
- Departs 05:3062 flights17.5%
- Departs 06:0045 flights12.7%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1727 runs 4 points better at 92.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 1727 next to TLH to ATL
Every carrier on TLH to ATL combined arrived on time 85.9% of the time across 2,011 flights, so DL 1727 is 7 points ahead of it. Delta flew 2,009 flights on the same city pair under all its flight numbers, including this one, and those ran 85.9% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1727thin sample | 355 | 92.9% | 124 min | 1.13% | A |
| All Delta Air Lines on TLH–ATL | 2,009 | 85.9% | 98 min | 1.64% | A |
| All carriers on TLH–ATL | 2,011 | 85.9% | 98 min | 1.69% | A |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1727 quarter by quarter
Quarter by quarter DL 1727 held fairly steady: 93.3% in Jul–Sep 2025, 89.0% in Oct–Dec 2025, 90.8% in Jan–Mar 2026, 96.5% in Apr–Jun 2026 and 96.6% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights93.3%
- Oct–Dec 202592 flights89.0%
- Jan–Mar 202690 flights90.8%
- Apr–Jun 202685 flights96.5%
- Jul–Sep 202658 flights96.6%
Scale runs 80% to 100%.
By weekday, DL 1727 did best on Thursday at 98.0% on time and worst on Monday at 84.3%. Each day rests on about 51 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1727 runs when it is late
DL 1727 often beats the schedule: 188 of 351 completed flights, 54%, arrived 15 minutes or more early. When DL 1727 is late it tends to be very late: 14 of its 25 late arrivals were an hour or more behind, and 8 were two hours or more.
- 15+ min early188 flights53.6%
- Within 15 min138 flights39.3%
- 15–29 min late7 flights2.0%
- 30–59 min late4 flights1.1%
- 1–2 hours late6 flights1.7%
- 2+ hours late8 flights2.3%
Scale runs 0% to 100%.
Share of 351 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 22 departures that left 15 minutes late or more, only 2 made it up before arrival. Only 5 left on time and still arrived late.
The worst days
Worst days for DL 1727
The latest arrival of the period was on 25 August 2026, 8 hours 35 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 25 August 2026 | 8 hours 35 minutes | Carrier |
| 24 December 2025 | 8 hours 18 minutes | Carrier |
| 10 January 2026 | 6 hours 58 minutes | Carrier |
| 24 November 2025 | 4 hours 50 minutes | Carrier |
| 20 October 2025 | 2 hours 37 minutes | Late-arriving aircraft |
Delay causes
Why DL 1727 runs late
Carrier accounts for 83% of the 3,088 delay minutes carriers reported here, and the remaining four split what is left.
- 83%Carrier
- 12%National Airspace System
- 5%Late-arriving aircraft
- 0%Extreme weather
The largest share of delay minutes, 83%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,561 of the 3,088 delay minutes reported here. The split is drawn from 3,088 delay minutes reported on DL 1727.
Cancellations sit at 1.13% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.0% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
Every one of the 355 flights under DL 1727 in the data flew TLH to ATL. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 355 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 DL 1727
For a booking, DL 1727 has one of the better records a US domestic flight can show: 92.9% on time and 1.13% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- TLH to ATL, every carrier and departure
- ATL to TLH, the return direction
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
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.