Flight number record

DL 310

Delta Air Lines · Honolulu to Detroit

Route: HNL → DTW
Departs: 16:45
Flights: 290
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 310, check with Delta Air Lines.

DL 310 lands a B+, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 40 minutes on average. That is a workable record, not a spotless one. That rests on 290 flights, with a median arrival 8 minutes early.

Set against the rest of the country, DL 310's record is 6 points better than the US average of 77.6%. That gap is worth roughly 57 fewer late arrivals for every thousand flights.

On time

83.3%

Arrivals under 15 minutes late, of 287 completed flights

Avg delay

40 min

Across delayed arrivals only, not all flights

Cancelled

0.69%

National rate is 1.81%

1 hour+ late

2.8%

National rate is 8.1%

These figures cover 290 flights between July 2025 and June 2026. The median arrival is 8 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.

Schedule

When DL 310 flies

DL 310 flies HNL to DTW without a single fixed slot. Its most common scheduled departure was 16:45, used on 64 of 290 flights, with 14:45 (61 flights) and 15:00 (40 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:4564 flights22.1%
Departs 14:4561 flights21.0%
Departs 15:0040 flights13.8%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 16:45 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 310 runs 11 points better at 83.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 310 next to HNL to DTW

Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 2 points.

DL 310 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 310thin sample	290	83.3%	40 min	0.69%	B+
All Delta Air Lines on HNL–DTWthin sample	290	83.3%	40 min	0.69%	B+
All carriers on HNL–DTWthin sample	290	83.3%	40 min	0.69%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	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 Jan–Mar 2026 at 77.8%, a swing of 12 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 202579 flights85.9%
Oct–Dec 202548 flights89.4%
Jan–Mar 202672 flights77.8%
Apr–Jun 202691 flights82.2%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 310 ranged from 77.3% on Thursday to 88.9% on Tuesday. With about 41 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 310 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 49% of the 1,920 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
49%
Carrier
32%
National Airspace System
19%

49% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 1,920 reported delay minutes here, that single category outweighs weather by 49 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 1,920 delay minutes reported on DL 310.

Cancellations are rare at 0.69%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.8% land an hour or more behind schedule, against 8.1% 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 83.3% on time with 0.69% cancelled over 290 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures