Flight profile · Delta Air Lines
DL451
Portland (PDX) to New York (JFK) · scheduled 7:00 AM – 3:29 PM
How DL451 performs
783 operations, June 2024 – July 2026.
DL451 arrived on time 89.9% of the time, against 82.3% for all PDX → JFK flights, so this departure is 7.6 percentage points better than the route as a whole. Against Delta Air Lines’ own flights on this route it is 2.5 points better.
Source: US DOT Bureau of Transportation Statistics · 783 operations, June 2024 – July 2026 · If DL451 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where DL451 is right now
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| DL451 | 89.9% | 1.79% | -14 min | 2.1% | 783 |
| Delta Air Lines on PDX → JFK | 87.4% | 1.43% | -14 min | 4.6% | 1,677 |
| All PDX → JFK flights | 82.3% | 1.83% | -9 min | 6.2% | 2,955 |
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
Why DL451 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for DL451 on PDX → 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 DL451 comes in late, and what that does to the departure.
DL451 is usually the aircraft’s first flight of the day: the schedule gives it a median of 8.8 hours on the ground at PDX, so its “inbound” is mostly the aircraft’s arrival the evening before.
When the aircraft came in 15 or more minutes late, DL451 pushed back an average of 4 minutes late; when it came in on time or early, an average of 2 minutes late.
Each departure is matched to the flight the same aircraft flew into PDX just before it, using the tail number in the DOT file, 720 of 769 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 |
|---|---|---|---|
| DL451 | 31% | 6% | 4% |
| Network, same turn | 29% | 12% | 9% |
A night on the ground absorbs most of a late arrival, so a late inbound matters far less on a turn this long than on a same-day one.
The network row is every flight with a scheduled turn of 6 hours or more, usually overnight. How often DL451’s aircraft landed 15 or more minutes late is about the same as the network’s and, once the aircraft was late, how often DL451 left 15 or more minutes late is lower 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 PDX late, does that still matter by the time it reaches JFK?
DL451 pushes back an average of 4.8 minutes late and reaches the gate at JFK an average of 7.8 minutes early. The 12.6 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. It spends 17.2 minutes on the taxiways at PDX, 1.7 minutes shorter than a typical PDX departure in the same hour.
On arrival at JFK, DL451 spends 13.2 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 1.8 minutes longer 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 23,173 departures from PDX scheduled in the clock hour DL451 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 DL451’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
The hour it leaves PDX
Part of any flight’s record belongs to the clock rather than to the flight. DL451 has one departure time, so this is what that time is worth.
On-time arrival rate. 23,173 departures from PDX are scheduled in the 7 AM–8 AM hour over the period, against 187,633 across the whole day.
DL451 is scheduled out of PDX at 7:00 AM, in the 7 AM–8 AM bank. Departures from PDX in that hour arrive on time 85.8% of the time against 83.2% across the airport’s whole day, so the hour DL451 leaves in is an ordinary one for PDX and explains nothing about its record either way.
The two airport figures cover every departure from PDX 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 DL451 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 |
|---|---|---|---|
| LAX→ATL Los Angeles to Atlanta | December 16, 2023 – June 6, 2024 | 44 | — |
| DTW→MSP Detroit to Minneapolis | March 10, 2024 – May 6, 2024 | 58 | — |
| LAX→MCO Los Angeles to Orlando | January 8, 2024 – March 9, 2024 | 62 | — |
| MCO→LAX Orlando to Los Angeles | January 8, 2024 – March 9, 2024 | 62 | — |
| ATL→DCA Atlanta to Washington | January 2–7, 2024 | 2 | — |
| DCA→ATL Washington to Atlanta | January 7, 2024 | 1 | — |
| SFO→MSP San Francisco to Minneapolis | September 5, 2023 – December 15, 2023 | 102 | 97.1% |
| DFW→JFK Dallas–Fort Worth to New York | July 1, 2023 – September 4, 2023 | 66 | — |
Because the same number has served different journeys, the statistics above describe only the route DL451 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.
15 min late
against a median of 14 min early
Percentiles over 783 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 |
|---|---|---|---|---|
| DL451 this flight | Delta Air Lines | 89.9% | 14 min early | 783 |
| AS18 | Alaska Airlines | 77.8% | 4 min early | 1,042 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. DL451 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 783 records of DL451 operating PDX → 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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