Flight number record

DL 3127

Delta Air Lines · Melbourne to Atlanta

Route: MLB → ATL
Departs: 14:49
Flights: 364
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s DL 3127, check with Delta Air Lines.

DL 3127 lands a B+, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 364 flights, with a median arrival 11 minutes early.

On time

79.3%

Arrivals under 15 minutes late, of 362 completed flights

Avg delay

96 min

Across delayed arrivals only, not all flights

Cancelled

0.55%

National rate is 1.89%

1 hour+ late

9.1%

National rate is 8.3%

These figures cover 364 flights between September 2025 and August 2026. Beyond the headline rate, 9.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Schedule

When DL 3127 flies

DL 3127 flies MLB to ATL without a single fixed slot. Its most common scheduled departure was 14:49, used on 58 of 364 flights, with 14:29 (47 flights) next.

Departs 14:4958 flights15.9%
Departs 14:2947 flights12.9%

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 14:49 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 3127 runs 7 points better at 79.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

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Against the route

DL 3127 next to MLB to ATL

Every carrier on MLB to ATL combined arrived on time 86.7% of the time across 1,451 flights, so DL 3127 is 7 points behind it. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 2 points.

DL 3127 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 3127thin sample	364	79.3%	96 min	0.55%	B+
All Delta Air Lines on MLB–ATL	1,451	86.7%	86 min	1.45%	A
All carriers on MLB–ATL	1,451	86.7%	86 min	1.45%	A
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 3127 quarter by quarter

DL 3127 did not run the same all year. Its best quarter was Jan–Mar 2026 at 86.4% on time and its weakest Jul–Sep 2026 at 59.7%, a swing of 27 points on roughly 73 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Jul–Sep 202530 flights80.0%
Oct–Dec 202591 flights82.4%
Jan–Mar 202690 flights86.4%
Apr–Jun 202691 flights82.4%
Jul–Sep 202662 flights59.7%

Scale runs 50% to 90%.

By weekday, DL 3127 did best on Monday at 88.5% on time and worst on Sunday at 61.5%. Each day rests on about 52 flights, so a gap of 27 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late DL 3127 runs when it is late

DL 3127 often beats the schedule: 144 of 362 completed flights, 40%, arrived 15 minutes or more early. The 75 late arrivals split 20 under half an hour, 22 between 30 and 60 minutes, and 33 an hour or more.

15+ min early144 flights39.8%
Within 15 min143 flights39.5%
15–29 min late20 flights5.5%
30–59 min late22 flights6.1%
1–2 hours late15 flights4.1%
2+ hours late18 flights5.0%

Scale runs 0% to 100%.

Share of 362 completed flights by arrival against schedule.

11 of 78 late departures made up the time and arrived on time, 14% of them. 8 flights left on time and still arrived late.

The worst days

Worst days for DL 3127

The latest arrival of the period was on 10 September 2025, 10 hours 27 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.

The latest arrivals of DL 3127 in the period
Date	Arrived late by	Largest filed cause
10 September 2025	10 hours 27 minutes	Carrier
18 August 2026	8 hours 59 minutes	Carrier
6 August 2026	5 hours 52 minutes	Extreme weather
6 September 2025	5 hours 3 minutes	Carrier
27 October 2025	4 hours 39 minutes	Extreme weather

Delay causes

Why DL 3127 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 7,200 reported delay minutes.

Late-arriving aircraft
34%
Carrier
30%
Extreme weather
18%
National Airspace System
18%

Extreme weather accounts for 18% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.9 times the usual weather exposure. The split is drawn from 7,200 delay minutes reported on DL 3127.

Cancellations are rare at 0.55%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

9.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.

DL 3127 is not only a MLB to ATL flight. It also flew ATL to MLB (364 flights, 84.5% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 364 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.

Other routes flown as DL 3127
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
ATL to MLBthin sample	364	84.5%	51 min	0.27%	B+

What to do with this

Booking DL 3127

For a booking, DL 3127 is one of the weaker ways to fly MLB to ATL: 7 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

Where to go next

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 22 October 2026; recomputed monthly. How this data is collected.

Key figures