Flight number record
DL 444
Delta Air Lines · Atlanta to Seattle
- Route
- ATL → SEA
- Departs
- 07:25
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 444, check with Delta Air Lines.
DL 444 lands a B, about a point better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about 55 minutes on average. That rests on 363 flights, with a median arrival 5 minutes early.
Key figures
On time
78.3%
Arrivals under 15 minutes late, of 355 completed flights
Avg delay
54 min
Across delayed arrivals only, not all flights
Cancelled
1.65%
National rate is 1.89%
1 hour+ late
6.2%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 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.
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Schedule
When DL 444 flies
DL 444 flies ATL to SEA without a single fixed slot. Its most common scheduled departure was 07:25, used on 97 of 363 flights, with 07:45 (80 flights) and 07:30 (64 flights) next.
- Departs 07:2597 flights26.7%
- Departs 07:4580 flights22.0%
- Departs 07:3064 flights17.6%
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 07:25 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 444 runs 11 points worse at 78.3%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 444 next to ATL to SEA
Every carrier on ATL to SEA combined arrived on time 76.7% of the time across 3,297 flights, so DL 444 is 2 points ahead of it. Delta flew 2,404 flights on the same city pair under all its flight numbers, including this one, and those ran 76.8% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 444thin sample | 363 | 78.3% | 54 min | 1.65% | B |
| All Delta Air Lines on ATL–SEA | 2,404 | 76.8% | 58 min | 0.62% | B+ |
| All carriers on ATL–SEA | 3,297 | 76.7% | 57 min | 0.73% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 444 quarter by quarter
DL 444 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jul–Sep 2026 at 74.2%, a swing of 19 points on roughly 73 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 flights93.3%
- Oct–Dec 202591 flights80.7%
- Jan–Mar 202689 flights77.4%
- Apr–Jun 202691 flights74.7%
- Jul–Sep 202662 flights74.2%
Scale runs 65% to 100%.
By weekday, DL 444 did best on Friday at 87.8% on time and worst on Sunday at 68.6%. Each day rests on about 52 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 444 runs when it is late
The 77 late arrivals split 35 under half an hour, 20 between 30 and 60 minutes, and 22 an hour or more.
- 15+ min early87 flights24.5%
- Within 15 min191 flights53.8%
- 15–29 min late35 flights9.9%
- 30–59 min late20 flights5.6%
- 1–2 hours late13 flights3.7%
- 2+ hours late9 flights2.5%
Scale runs 0% to 100%.
Share of 355 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 46 departures that left 15 minutes late or more, only 4 made it up before arrival. In the other direction, 35 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SEA.
The worst days
Worst days for DL 444
The latest arrival of the period was on 1 August 2026, 7 hours 22 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 1 August 2026 | 7 hours 22 minutes | Carrier |
| 25 March 2026 | 3 hours 1 minute | Carrier |
| 11 May 2026 | 2 hours 52 minutes | Carrier |
| 6 July 2026 | 2 hours 37 minutes | Late-arriving aircraft |
| 24 June 2026 | 2 hours 31 minutes | Carrier |
Delay causes
Why DL 444 runs late
Carrier accounts for 63% of the 4,165 delay minutes carriers reported here, and the remaining four split what is left.
- 63%Carrier
- 26%National Airspace System
- 8%Late-arriving aircraft
- 3%Extreme weather
The largest share of delay minutes, 63%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,620 of the 4,165 delay minutes reported here. The split is drawn from 4,165 delay minutes reported on DL 444.
Cancellations sit at 1.65% against a national 1.89%, which is ordinary. Diversions add another 0.55%.
Connections and routes
What a delay on this flight costs
6.2% of arrivals land an hour or more late, close to the national 8.3%, so 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.
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.
Every one of the 363 flights under DL 444 in the data flew ATL to SEA. 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. 363 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 444
For a booking, read DL 444 as 78.3% on time with 1.65% cancelled over 363 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATL to SEA, every carrier and departure
- SEA to ATL, the return direction
- Delta Air Lines 629 on the same route80.4%
- Delta Air Lines 774 on the same route84.6%
- Delta Air Lines 481 on the same route78.4%
- Delta Air Lines 714 on the same route65.0%
- Alaska Airlines 377 on the same route85.3%
- Delta Air Lines 903 on the same route77.7%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Seattle-Tacoma International (SEA) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
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 ; recomputed monthly. How this data is collected.