Flight number record

DL 1660

Delta Air Lines · Kansas City to Atlanta

Route: MCI → ATL
Departs: 17:12
Flights: 356
Period: September 2025 to August 2026

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

DL 1660 earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 356 flights, with a median arrival 17 minutes early.

Set against the rest of the country, DL 1660's record is 8 points better than the US average of 77.3%. That gap is worth roughly 75 fewer late arrivals for every thousand flights.

On time

84.8%

Arrivals under 15 minutes late, of 349 completed flights

Avg delay

57 min

Across delayed arrivals only, not all flights

Cancelled

1.69%

National rate is 1.89%

1 hour+ late

4.9%

National rate is 8.3%

These figures cover 356 flights between September 2025 and August 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.

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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 356 flights, with 17:40 (52 flights) and 17:13 (37 flights) next.

Departs 17:1256 flights15.7%
Departs 17:4052 flights14.6%
Departs 17:1337 flights10.4%

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 17:12 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 1660 runs 17 points better at 84.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

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Against the route

DL 1660 next to MCI to ATL

Every carrier on MCI to ATL combined arrived on time 86.4% of the time across 3,246 flights, so DL 1660 is 2 points behind it. Delta flew 2,708 flights on the same city pair under all its flight numbers, including this one, and those ran 89.4% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 4 points.

DL 1660 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1660thin sample	356	84.8%	57 min	1.69%	B
All Delta Air Lines on MCI–ATL	2,708	89.4%	74 min	1.48%	A
All carriers on MCI–ATL	3,246	86.4%	72 min	1.32%	A
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 1660 quarter by quarter

DL 1660 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jul–Sep 2026 at 74.1%, a swing of 23 points on roughly 71 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 flights96.7%
Oct–Dec 202588 flights83.5%
Jan–Mar 202689 flights88.4%
Apr–Jun 202691 flights85.6%
Jul–Sep 202658 flights74.1%

Scale runs 65% to 100%.

By weekday, DL 1660 did best on Saturday at 93.3% on time and worst on Sunday at 72.0%. Each day rests on about 51 flights, so a gap of 21 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late DL 1660 runs when it is late

DL 1660 often beats the schedule: 196 of 349 completed flights, 56%, arrived 15 minutes or more early. The 53 late arrivals split 14 under half an hour, 22 between 30 and 60 minutes, and 17 an hour or more.

15+ min early196 flights56.2%
Within 15 min100 flights28.7%
15–29 min late14 flights4.0%
30–59 min late22 flights6.3%
1–2 hours late13 flights3.7%
2+ hours late4 flights1.1%

Scale runs 0% to 100%.

Share of 349 completed flights by arrival against schedule.

16 of 62 late departures made up the time and arrived on time, 26% of them. 7 flights left on time and still arrived late.

The worst days

Worst days for DL 1660

The latest arrival of the period was on 17 June 2026, 2 hours 48 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.

The latest arrivals of DL 1660 in the period
Date	Arrived late by	Largest filed cause
17 June 2026	2 hours 48 minutes	Carrier
22 February 2026	2 hours 33 minutes	Late-arriving aircraft
19 July 2026	2 hours 28 minutes	Late-arriving aircraft
7 December 2025	2 hours 27 minutes	Late-arriving aircraft
22 May 2026	1 hour 45 minutes	National Airspace System

Delay causes

Why DL 1660 runs late

Late-arriving aircraft accounts for 51% of the 3,016 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
51%
National Airspace System
28%
Carrier
20%
Extreme weather
0%

51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,016 reported delay minutes here, that single category outweighs weather by 51 to one. The split is drawn from 3,016 delay minutes reported on DL 1660.

Cancellations sit at 1.69% against a national 1.89%, 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 4.9% 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.

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.

DL 1660 is not only a MCI to ATL flight. It also flew ATL to MCI (320 flights, 83.6% 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. 356 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	83.6%	49 min	0.94%	B+

What to do with this

Booking DL 1660

For a booking, read DL 1660 as 84.8% on time with 1.69% cancelled over 356 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures