Flight number record

DL 309

Delta Air Lines · Honolulu to Atlanta

Route: HNL → ATL
Departs: 15:05
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 309, check with Delta Air Lines.

DL 309 lands a B+, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 365 flights, with a median arrival 8 minutes early.

On time

80.1%

Arrivals under 15 minutes late, of 361 completed flights

Avg delay

74 min

Across delayed arrivals only, not all flights

Cancelled

0.82%

National rate is 1.81%

1 hour+ late

5.5%

National rate is 8.1%

These figures cover 365 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 309 flies

DL 309 flies HNL to ATL without a single fixed slot. Its most common scheduled departure was 15:05, used on 97 of 365 flights, with 16:50 (62 flights) and 17:00 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:0597 flights26.6%
Departs 16:5062 flights17.0%
Departs 17:0041 flights11.2%

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 15:05 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 309 runs 8 points better at 80.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 309 next to HNL to ATL

Every carrier on HNL to ATL combined arrived on time 79.4% of the time across 383 flights, so DL 309 is about level with it. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 2 points.

DL 309 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 309	365	80.1%	74 min	0.82%	B+
All Delta Air Lines on HNL–ATL	383	79.4%	73 min	0.78%	B+
All carriers on HNL–ATL	383	79.4%	73 min	0.78%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 309 quarter by quarter

DL 309 did not run the same all year. Its best quarter was Jul–Sep 2025 at 88.0% on time and its weakest Jan–Mar 2026 at 67.4%, a swing of 21 points on roughly 91 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 202592 flights88.0%
Oct–Dec 202592 flights76.9%
Jan–Mar 202690 flights67.4%
Apr–Jun 202691 flights87.6%

Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 309 ranged from 76.9% on Friday to 83.0% on Tuesday. With about 52 flights behind each day, a spread of 6 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 309 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 63% of the 5,333 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
63%
Carrier
21%
National Airspace System
14%
Extreme weather
2%

63% 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 5,333 reported delay minutes here, that single category outweighs weather by 29 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 5,333 delay minutes reported on DL 309.

Cancellations are rare at 0.82%, 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

5.5% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

At 4,502 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 309 in the data flew HNL to ATL. 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 309

For a booking, read DL 309 as 80.1% on time with 0.82% cancelled over 365 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