Flight number record
DL 310
Delta Air Lines · Honolulu to Detroit
- Route
- HNL → DTW
- Departs
- 14:45
- Flights
- 290
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 310, check with Delta Air Lines.
DL 310 lands a B, 5 points better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about 50 minutes on average. That rests on 290 flights, with a median arrival 9 minutes early.
Set against the rest of the country, DL 310's record is 5 points better than the US average of 77.3%. That gap is worth roughly 45 fewer late arrivals for every thousand flights.
Key figures
On time
81.8%
Arrivals under 15 minutes late, of 285 completed flights
Avg delay
49 min
Across delayed arrivals only, not all flights
Cancelled
1.38%
National rate is 1.89%
1 hour+ late
4.2%
National rate is 8.3%
These figures cover 290 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 310 flies
DL 310 flies HNL to DTW without a single fixed slot. Its most common scheduled departure was 14:45, used on 94 of 290 flights, with 16:45 (64 flights) and 14:50 (37 flights) next.
- Departs 14:4594 flights32.4%
- Departs 16:4564 flights22.1%
- Departs 14:5037 flights12.8%
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 14:45 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 310 runs 10 points better at 81.8%. 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 310 next to HNL to DTW
Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 310thin sample | 290 | 81.8% | 49 min | 1.38% | B |
| All Delta Air Lines on HNL–DTWthin sample | 290 | 81.8% | 49 min | 1.38% | B |
| All carriers on HNL–DTWthin sample | 290 | 81.8% | 49 min | 1.38% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 310 quarter by quarter
DL 310 did not run the same all year. Its best quarter was Oct–Dec 2025 at 89.4% on time and its weakest Jul–Sep 2026 at 76.3%, a swing of 13 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 202517 flights—
- Oct–Dec 202548 flights89.4%
- Jan–Mar 202672 flights77.8%
- Apr–Jun 202691 flights82.2%
- Jul–Sep 202662 flights76.3%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, DL 310 did best on Tuesday at 91.4% on time and worst on Thursday at 73.3%. Each day rests on about 41 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 310 runs when it is late
DL 310 often beats the schedule: 103 of 285 completed flights, 36%, arrived 15 minutes or more early. The 52 late arrivals split 23 under half an hour, 17 between 30 and 60 minutes, and 12 an hour or more.
- 15+ min early103 flights36.1%
- Within 15 min130 flights45.6%
- 15–29 min late23 flights8.1%
- 30–59 min late17 flights6.0%
- 1–2 hours late9 flights3.2%
- 2+ hours late3 flights1.1%
Scale runs 0% to 100%.
Share of 285 completed flights by arrival against schedule.
14 of 55 late departures made up the time and arrived on time, 25% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for DL 310
The latest arrival of the period was on 30 August 2026, 4 hours 11 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On four of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 August 2026 | 4 hours 11 minutes | Carrier |
| 18 July 2026 | 2 hours 44 minutes | Late-arriving aircraft |
| 28 November 2025 | 2 hours 41 minutes | Late-arriving aircraft |
| 24 June 2026 | 1 hour 45 minutes | Late-arriving aircraft |
| 6 August 2026 | 1 hour 41 minutes | Late-arriving aircraft |
Delay causes
Why DL 310 runs late
Late-arriving aircraft accounts for 53% of the 2,547 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Late-arriving aircraft
- 31%Carrier
- 15%National Airspace System
- 1%Extreme weather
53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,547 reported delay minutes here, that single category outweighs weather by 53 to one. The split is drawn from 2,547 delay minutes reported on DL 310.
Cancellations sit at 1.38% against a national 1.89%, which is ordinary. Diversions add another 0.34%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.2% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 4,475 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 290 flights under DL 310 in the data flew HNL to DTW. 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. 290 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 310
For a booking, read DL 310 as 81.8% on time with 1.38% cancelled over 290 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- Daniel K. Inouye International (HNL) delay statistics
- Detroit Metropolitan Wayne County (DTW) 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.