Flight profile · Delta Air Lines
DL427
Honolulu (HNL) to Los Angeles (LAX) · scheduled 12:00 PM – 9:50 PM
How DL427 performs
691 operations, September 2024 – July 2026.
DL427 arrived on time 81.3% of the time, against 83.4% for all HNL → LAX flights, so this departure is 2.1 percentage points worse than the route as a whole. Against Delta Air Lines’ own flights on this route it is 7.8 points worse.
Source: US DOT Bureau of Transportation Statistics · 691 operations, September 2024 – July 2026 · If DL427 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where DL427 is right now
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| DL427 | 81.3% | 0.43% | -9 min | 5.2% | 691 |
| Delta Air Lines on HNL → LAX | 89.1% | 0.77% | -12 min | 3.9% | 3,381 |
| All HNL → LAX flights | 83.4% | 0.63% | -8 min | 4.9% | 17,040 |
Source: FlyerIntel analysis of US DOT BTS data · September 2024 – July 2026
Why DL427 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
Share of the delay minutes US DOT attributed to each cause for DL427 on HNL → LAX. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering September 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies DL427 comes in late, and what that does to the departure.
The aircraft flying DL427 came in 15 or more minutes late on 17% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.
Each departure is matched to the flight the same aircraft flew into HNL just before it, using the tail number in the DOT file, 214 of 688 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 |
|---|---|
| DL427 | 17% |
| Network, same turn | 23% |
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 DL427’s aircraft landed 15 or more minutes late is lower than the network’s. There are not enough departures in both groups to compare how it left.
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 September 2024 – July 2026
From pushback to gate
When it leaves HNL late, does that still matter by the time it reaches LAX?
DL427 pushes back an average of 7.4 minutes late and reaches the gate at LAX an average of 2.4 minutes late. The 5.0 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 20.4 minutes on the taxiways at HNL, 2.0 minutes longer than a typical HNL departure in the same hour.
On arrival at LAX, DL427 spends 15.0 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 4.2 minutes longer than a typical LAX arrival (10.7 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 LAX. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 15,109 departures from HNL scheduled in the clock hour DL427 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at LAX (595,170 flights), not just DL427’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · September 2024 – July 2026
The hour it leaves HNL
Part of any flight’s record belongs to the clock rather than to the flight. DL427 has one departure time, so this is what that time is worth.
On-time arrival rate. 15,109 departures from HNL are scheduled in the 12 PM–1 PM hour over the period, against 186,300 across the whole day.
DL427 is scheduled out of HNL at 12:00 PM, in the 12 PM–1 PM bank. Departures from HNL in that hour arrive on time 80.6% of the time against 85.3% across the airport’s whole day — the slot alone is worth 4.7 points worse before anything about this particular flight is considered.
The two airport figures cover every departure from HNL 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 · September 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes DL427 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 |
|---|---|---|---|
| PDX→ATL Portland to Atlanta | July 8, 2024 – September 8, 2024 | 63 | — |
| ATL→LAS Atlanta to Las Vegas | June 7, 2024 – July 7, 2024 | 31 | — |
| SEA→BOS Seattle to Boston | July 1, 2023 – June 6, 2024 | 159 | 84.7% |
| MSP→SEA Minneapolis to Seattle | April 9, 2024 – May 6, 2024 | 28 | — |
| LAX→ATL Los Angeles to Atlanta | January 8, 2024 – March 9, 2024 | 62 | — |
| MSP→MCO Minneapolis to Orlando | November 5, 2023 – December 6, 2023 | 31 | — |
| LAS→JFK Las Vegas to New York | November 23, 2023 | 1 | — |
| TPA→ATL Tampa to Atlanta | October 9, 2023 – November 4, 2023 | 27 | — |
| ATL→TPA Atlanta to Tampa | October 9–31, 2023 | 21 | — |
| ATL→JAC Atlanta to Jackson | October 1–8, 2023 | 8 | — |
Because the same number has served different journeys, the statistics above describe only the route DL427 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.
28 min late
against a median of 9 min early
Percentiles over 691 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering September 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 |
|---|---|---|---|---|
| DL422 | Delta Air Lines | 92.4% | 13 min early | 691 |
| UA1221 | United Airlines | 92.3% | 16 min early | 953 |
| DL658 | Delta Air Lines | 91.4% | 13 min early | 1,124 |
| UA1169 | United Airlines | 91.2% | 17 min early | 746 |
| AA144 | American Airlines | 90.1% | 14 min early | 816 |
| AA162 | American Airlines | 84.0% | 8 min early | 1,127 |
| UA1157 | United Airlines | 81.9% | 7 min early | 859 |
| DL427 this flight | Delta Air Lines | 81.3% | 9 min early | 691 |
| HA10 | Hawaiian Airlines | 80.8% | 3 min early | 837 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. DL427 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 691 records of DL427 operating HNL → LAX, 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
Analysis last recomputed