Flight number record

DL 3139

Delta Air Lines · Atlanta to Charlotte

Route: ATL → CLT
Departs: 19:10
Flights: 343
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 3139, check with Delta Air Lines.

DL 3139 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 343 flights, with a median arrival 4 minutes early.

On time

74.0%

Arrivals under 15 minutes late, of 338 completed flights

Avg delay

57 min

Across delayed arrivals only, not all flights

Cancelled

1.46%

National rate is 1.81%

1 hour+ late

9.5%

National rate is 8.1%

These figures cover 343 flights between July 2025 and June 2026. Beyond the headline rate, 9.5% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When DL 3139 flies

DL 3139 flies ATL to CLT without a single fixed slot. Its most common scheduled departure was 19:10, used on 65 of 343 flights, with 19:16 (56 flights) and 19:30 (44 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 19:1065 flights19.0%
Departs 19:1656 flights16.3%
Departs 19:3044 flights12.8%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 19:10 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and DL 3139 runs 6 points better at 74.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 3139 next to ATL to CLT

Every carrier on ATL to CLT combined arrived on time 81.1% of the time across 4,408 flights, so DL 3139 is 7 points behind it. Delta flew 2,610 flights on the same city pair under all its flight numbers, including this one, and those ran 81.3% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 8 points.

DL 3139 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 3139thin sample	343	74.0%	57 min	1.46%	C
All Delta Air Lines on ATL–CLT	2,610	81.3%	60 min	1.15%	B
All carriers on ATL–CLT	4,408	81.1%	73 min	1.72%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 3139 quarter by quarter

DL 3139 did not run the same all year. Its best quarter was Jan–Mar 2026 at 81.0% on time and its weakest Oct–Dec 2025 at 68.9%, a swing of 12 points on roughly 86 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 202586 flights72.1%
Oct–Dec 202592 flights68.9%
Jan–Mar 202687 flights81.0%
Apr–Jun 202678 flights74.4%

Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 3139 did best on Wednesday at 83.3% on time and worst on Saturday at 65.7%. Each day rests on about 49 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 3139 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 42% of the 4,994 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.

Late-arriving aircraft
42%
Carrier
38%
National Airspace System
18%
Extreme weather
2%

42% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 4,994 reported delay minutes here, that single category outweighs weather by 28 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 4,994 delay minutes reported on DL 3139.

Cancellations sit at 1.46% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.5% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

Every one of the 343 flights under DL 3139 in the data flew ATL to CLT. 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. 343 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 3139

For a booking, DL 3139 is one of the weaker ways to fly ATL to CLT: 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures