Flight profile · Delta Air Lines
DL452
Seattle (SEA) to New York (JFK) · scheduled 9:45 PM – 7:25 AM
How DL452 performs
781 operations, June 2024 – July 2026.
DL452 arrived on time 83.6% of the time, against 74.8% for all SEA → JFK flights, so this departure is 8.8 percentage points better than the route as a whole. Against Delta Air Lines’ own flights on this route it is 1.7 points better.
Source: US DOT Bureau of Transportation Statistics · 781 operations, June 2024 – July 2026 · If DL452 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where DL452 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| DL452 | 83.6% | 2.05% | -9 min | 3.9% | 781 |
| Delta Air Lines on SEA → JFK | 81.9% | 1.61% | -9 min | 5.3% | 4,092 |
| All SEA → JFK flights | 74.8% | 1.80% | -5 min | 7.6% | 9,123 |
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
Why DL452 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for DL452 on SEA → JFK. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies DL452 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, DL452 pushed back an average of 28 minutes late; when it came in on time or early, an average of 3 minutes late.
Each departure is matched to the flight the same aircraft flew into SEA just before it, using the tail number in the DOT file, 634 of 765 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| DL452 | 24% | 57% | 11% |
| Network, same turn | 23% | 40% | 9% |
The schedule leaves a long gap on the ground, which gives a late aircraft room to catch up before this flight pushes back.
The network row is every flight with a scheduled turn of 90 minutes to 3 hours. How often DL452’s aircraft landed 15 or more minutes late is about the same as the network’s and, once the aircraft was late, how often DL452 left 15 or more minutes late is higher than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
From pushback to gate
When it leaves SEA late, does that still matter by the time it reaches JFK?
DL452 pushes back an average of 9.9 minutes late and reaches the gate at JFK an average of 3.4 minutes early. The 13.4 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. Its 20.6 minutes on the taxiways at SEA is about what any departure from the airport in that hour spends.
On arrival at JFK, DL452 spends 9.8 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 1.7 minutes shorter than a typical JFK arrival (11.5 min).
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached JFK. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 27,339 departures from SEA scheduled in the clock hour DL452 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at JFK (351,546 flights), not just DL452’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
The hour it leaves SEA
Part of any flight’s record belongs to the clock rather than to the flight. DL452 has one departure time, so this is what that time is worth.
On-time arrival rate. 27,339 departures from SEA are scheduled in the 9 PM–10 PM hour over the period, against 510,205 across the whole day.
DL452 is scheduled out of SEA at 9:45 PM, in the 9 PM–10 PM bank. Departures from SEA in that hour arrive on time 75.9% of the time against 79.1% across the airport’s whole day — the slot alone is worth 3.3 points worse before anything about this particular flight is considered.
The two airport figures cover every departure from SEA to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes DL452 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| SAN→ATL San Diego to Atlanta | May 8, 2024 – June 6, 2024 | 30 | — |
| SEA→DTW Seattle to Detroit | April 9, 2024 – May 6, 2024 | 28 | — |
| MCI→SLC Kansas City to Salt Lake City | March 10, 2024 – April 8, 2024 | 18 | — |
| LGA→SLC New York to Salt Lake City | March 16–30, 2024 | 3 | — |
| LAX→AUS Los Angeles to Austin | January 8, 2024 – March 9, 2024 | 62 | — |
| ATL→VPS Atlanta to Valparaiso | December 23–31, 2023 | 9 | — |
| VPS→ATL Valparaiso to Atlanta | December 23–31, 2023 | 9 | — |
| JFK→LAX New York to Los Angeles | December 17–22, 2023 | 6 | — |
| SEA→MSP Seattle to Minneapolis | November 5, 2023 – December 15, 2023 | 41 | — |
| SFO→ATL San Francisco to Atlanta | September 5, 2023 – November 4, 2023 | 61 | — |
| ATL→SEA Atlanta to Seattle | July 1, 2023 – September 4, 2023 | 66 | — |
Because the same number has served different journeys, the statistics above describe only the route DL452 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
25 min late
against a median of 9 min early
Percentiles over 781 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL429 | Delta Air Lines | 87.2% | 10 min early | 785 |
| DL452 this flight | Delta Air Lines | 83.6% | 9 min early | 781 |
| AS26 | Alaska Airlines | 78.8% | 5 min early | 965 |
| AS22 | Alaska Airlines | 76.5% | 5 min early | 971 |
| DL415 | Delta Air Lines | 75.0% | 6 min early | 781 |
| AS34 | Alaska Airlines | 72.7% | 1 min early | 1,126 |
| B6264 | JetBlue | 62.6% | 2 min late | 674 |
| AS16 | Alaska Airlines | 54.5% | 10 min late | 1,077 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. DL452 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 781 records of DL452 operating SEA → JFK, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
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