Flight number record

DL 1617

Delta Air Lines · Atlanta to Greensboro

Route: ATL → GSO
Departs: 20:57
Flights: 296
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1617, check with Delta Air Lines.

DL 1617 lands a B, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about 55 minutes on average. That is a workable record, not a spotless one. That rests on 296 flights, with a median arrival 5 minutes early.

On time

80.3%

Arrivals under 15 minutes late, of 289 completed flights

Avg delay

55 min

Across delayed arrivals only, not all flights

Cancelled

2.36%

National rate is 1.81%

1 hour+ late

5.9%

National rate is 8.1%

These figures cover 296 flights between July 2025 and June 2026. The median arrival is 5 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.

Schedule

When DL 1617 flies

DL 1617 flies ATL to GSO without a single fixed slot. Its most common scheduled departure was 20:57, used on 38 of 296 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 20:5738 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 20:57 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 1617 runs 10 points better at 80.3%. 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 1617 next to ATL to GSO

Every carrier on ATL to GSO combined arrived on time 83.8% of the time across 2,755 flights, so DL 1617 is 4 points behind it. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 1617 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1617thin sample	296	80.3%	55 min	2.36%	B
All Delta Air Lines on ATL–GSO	2,755	83.8%	59 min	1.92%	B
All carriers on ATL–GSO	2,755	83.8%	59 min	1.92%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1617 quarter by quarter

DL 1617 did not run the same all year. Its best quarter was Jan–Mar 2026 at 84.8% on time and its weakest Jul–Sep 2025 at 73.2%, a swing of 12 points on roughly 74 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 202572 flights73.2%
Oct–Dec 202577 flights82.9%
Jan–Mar 202670 flights84.8%
Apr–Jun 202677 flights80.3%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1617 did best on Saturday at 93.8% on time and worst on Sunday at 73.3%. Each day rests on about 42 flights, so a gap of 21 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1617 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 3,106 reported delay minutes.

Carrier
39%
Late-arriving aircraft
36%
Extreme weather
13%
National Airspace System
12%

Extreme weather accounts for 13% 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 2.1 times the usual weather exposure. The split is drawn from 3,106 delay minutes reported on DL 1617.

Cancellations sit at 2.36% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

5.9% 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 about 55 minutes, which a normal layover absorbs.

The same number turns up on two other city pairs in the data, including ATL to BNA (16) and BNA to ATL (16), but none flew often enough under DL 1617 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to GSO only.

One caution: this is a thin sample. 296 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 1617

For a booking, read DL 1617 as 80.3% on time with 2.36% cancelled over 296 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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