Flight number record

DL 652

Delta Air Lines · Seattle to Atlanta

Route: SEA → ATL
Departs: 23:30
Flights: 348
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 652, check with Delta Air Lines.

DL 652 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 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 348 flights, with a median arrival 4 minutes early.

Set against the rest of the country, DL 652's record is 7 points better than the US average of 77.6%. That gap is worth roughly 65 fewer late arrivals for every thousand flights.

On time

84.1%

Arrivals under 15 minutes late, of 345 completed flights

Avg delay

63 min

Across delayed arrivals only, not all flights

Cancelled

0.57%

National rate is 1.81%

1 hour+ late

3.8%

National rate is 8.1%

These figures cover 348 flights between July 2025 and June 2026. The median arrival is 4 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 652 flies

DL 652 flies SEA to ATL without a single fixed slot. Its most common scheduled departure was 23:30, used on 67 of 348 flights, with 23:35 (44 flights) and 23:00 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 23:3067 flights19.3%
Departs 23:3544 flights12.6%
Departs 23:0041 flights11.8%

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 23:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 652 runs 14 points better at 84.1%. 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 652 next to SEA to ATL

Every carrier on SEA to ATL combined arrived on time 82.8% of the time across 3,276 flights, so DL 652 is about level with it. Delta flew 2,371 flights on the same city pair under all its flight numbers, including this one, and those ran 83.8% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 3 points.

DL 652 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 652thin sample	348	84.1%	63 min	0.57%	B+
All Delta Air Lines on SEA–ATL	2,371	83.8%	86 min	0.51%	B+
All carriers on SEA–ATL	3,276	82.8%	73 min	0.55%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 652 quarter by quarter

DL 652 did not run the same all year. Its best quarter was Oct–Dec 2025 at 93.7% on time and its weakest Jul–Sep 2025 at 68.5%, a swing of 25 points on roughly 87 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 202592 flights68.5%
Oct–Dec 202579 flights93.7%
Jan–Mar 202686 flights85.5%
Apr–Jun 202691 flights90.1%

Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 652 did best on Saturday at 97.9% on time and worst on Friday at 75.5%. Each day rests on about 50 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 652 runs late

One category carries most of the weight here. Carrier accounts for 47% of the 3,458 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.

Carrier
47%
Late-arriving aircraft
31%
National Airspace System
12%
Extreme weather
10%

The largest share of delay minutes, 47%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,623 of the 3,458 delay minutes reported here. The split is drawn from 3,458 delay minutes reported on DL 652.

Cancellations are rare at 0.57%, below the national 1.81% 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

Badly late arrivals are rare here: only 3.8% 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.

At 2,182 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

The same number turns up on two other city pairs in the data, including LGA to DFW (16) and DFW to LGA (16), but none flew often enough under DL 652 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to ATL only.

One caution: this is a thin sample. 348 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 652

For a booking, read DL 652 as 84.1% on time with 0.57% cancelled over 348 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