Flight number record

DL 1660

Delta Air Lines · Kansas City to Atlanta

Route: MCI → ATL
Departs: 17:12
Flights: 360
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1660, check with Delta Air Lines.

DL 1660 earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 55 minutes. That rests on 360 flights, with a median arrival 17 minutes early.

Set against the rest of the country, DL 1660's record is 9 points better than the US average of 77.6%. That gap is worth roughly 85 fewer late arrivals for every thousand flights.

On time

86.1%

Arrivals under 15 minutes late, of 353 completed flights

Avg delay

53 min

Across delayed arrivals only, not all flights

Cancelled

1.67%

National rate is 1.81%

1 hour+ late

4.2%

National rate is 8.1%

These figures cover 360 flights between July 2025 and June 2026. The median arrival is 17 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 1660 flies

DL 1660 flies MCI to ATL without a single fixed slot. Its most common scheduled departure was 17:12, used on 56 of 360 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:1256 flights15.6%

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 17:12 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and DL 1660 runs 18 points better at 86.1%. 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 1660 next to MCI to ATL

Every carrier on MCI to ATL combined arrived on time 87.4% of the time across 3,281 flights, so DL 1660 is about level with it. Delta flew 2,759 flights on the same city pair under all its flight numbers, including this one, and those ran 90.1% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 5 points.

DL 1660 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1660thin sample	360	86.1%	53 min	1.67%	A
All Delta Air Lines on MCI–ATL	2,759	90.1%	74 min	1.52%	A
All carriers on MCI–ATL	3,281	87.4%	73 min	1.37%	A
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1660 quarter by quarter

Quarter by quarter DL 1660 held fairly steady: 87.0% in Jul–Sep 2025, 83.5% in Oct–Dec 2025, 88.4% in Jan–Mar 2026 and 85.6% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights87.0%
Oct–Dec 202588 flights83.5%
Jan–Mar 202689 flights88.4%
Apr–Jun 202691 flights85.6%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1660 did best on Saturday at 91.8% on time and worst on Sunday at 76.0%. Each day rests on about 51 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1660 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 48% of the 2,606 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
48%
National Airspace System
28%
Carrier
24%

48% 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 2,606 reported delay minutes here, that single category outweighs weather by 48 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 2,606 delay minutes reported on DL 1660.

Cancellations sit at 1.67% against a national 1.81%, which is ordinary. Diversions add another 0.28%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.2% land an hour or more behind schedule, against 8.1% 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.

The 692 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

DL 1660 is not only a MCI to ATL flight. It also flew ATL to MCI (320 flights, 85.8% 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. 360 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 1660
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
ATL to MCIthin sample	320	85.8%	47 min	0.94%	A+

What to do with this

Booking DL 1660

For a booking, read DL 1660 as 86.1% on time with 1.67% cancelled over 360 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