Flight number record
DL 359
Delta Air Lines · Honolulu to Seattle
- Route
- HNL → SEA
- Departs
- 13:00
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 359, check with Delta Air Lines.
DL 359 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 77.3%. When something does go wrong the average delay runs about an hour. That rests on 365 flights, with a median arrival 9 minutes early.
Set against the rest of the country, DL 359's record is 7 points better than the US average of 77.3%. That gap is worth roughly 71 fewer late arrivals for every thousand flights.
Key figures
On time
84.4%
Arrivals under 15 minutes late, of 360 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
1.37%
National rate is 1.89%
1 hour+ late
5.0%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 9 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 359 flies
DL 359 flies HNL to SEA without a single fixed slot. Its most common scheduled departure was 13:00, used on 54 of 365 flights, with 13:17 (38 flights) and 13:20 (37 flights) next.
- Departs 13:0054 flights14.8%
- Departs 13:1738 flights10.4%
- Departs 13:2037 flights10.1%
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 13:00 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 359 runs 6 points better at 84.4%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 359 next to HNL to SEA
Every carrier on HNL to SEA combined arrived on time 74.9% of the time across 2,931 flights, so DL 359 is 10 points ahead of it. Delta flew 789 flights on the same city pair under all its flight numbers, including this one, and those ran 88.7% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 359 | 365 | 84.4% | 62 min | 1.37% | B |
| All Delta Air Lines on HNL–SEA | 789 | 88.7% | 76 min | 1.01% | A |
| All carriers on HNL–SEA | 2,931 | 74.9% | 72 min | 1.09% | C |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 359 quarter by quarter
Quarter by quarter DL 359 held fairly steady: 90.0% in Jul–Sep 2025, 83.5% in Oct–Dec 2025, 84.3% in Jan–Mar 2026, 84.3% in Apr–Jun 2026 and 83.6% in Jul–Sep 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202592 flights83.5%
- Jan–Mar 202690 flights84.3%
- Apr–Jun 202691 flights84.3%
- Jul–Sep 202662 flights83.6%
Scale runs 75% to 95%.
By weekday, DL 359 ranged from 80.4% on Thursday to 90.4% on Wednesday. With about 52 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 359 runs when it is late
DL 359 often beats the schedule: 138 of 360 completed flights, 38%, arrived 15 minutes or more early. The 56 late arrivals split 24 under half an hour, 14 between 30 and 60 minutes, and 18 an hour or more.
- 15+ min early138 flights38.3%
- Within 15 min166 flights46.1%
- 15–29 min late24 flights6.7%
- 30–59 min late14 flights3.9%
- 1–2 hours late8 flights2.2%
- 2+ hours late10 flights2.8%
Scale runs 0% to 100%.
Share of 360 completed flights by arrival against schedule.
11 of 44 late departures made up the time and arrived on time, 25% of them. In the other direction, 23 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 359
The latest arrival of the period was on 14 March 2026, 4 hours 21 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 March 2026 | 4 hours 21 minutes | Late-arriving aircraft |
| 16 April 2026 | 3 hours 29 minutes | Late-arriving aircraft |
| 7 August 2026 | 3 hours 1 minute | Carrier |
| 27 August 2026 | 2 hours 49 minutes | Carrier |
| 19 December 2025 | 2 hours 46 minutes | Late-arriving aircraft |
Delay causes
Why DL 359 runs late
Late-arriving aircraft accounts for 44% of the 3,481 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Late-arriving aircraft
- 33%Carrier
- 21%National Airspace System
- 1%Extreme weather
44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,481 reported delay minutes here, that single category outweighs weather by 35 to one. The split is drawn from 3,481 delay minutes reported on DL 359.
Cancellations sit at 1.37% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
5.0% 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 an hour, which a normal layover absorbs.
At 2,677 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 365 flights under DL 359 in the data flew HNL 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. 365 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 359
For a booking, read DL 359 as 84.4% on time with 1.37% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- HNL to SEA, every carrier and departure
- SEA to HNL, the return direction
- Delta Air Lines 440 on the same route92.0%
- Daniel K. Inouye International (HNL) 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
- Why the first flight of the morning is statistically safest
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.