Flight number record

DL 334

Delta Air Lines · Detroit to Las Vegas

Route: DTW → LAS
Departs: 08:59
Flights: 362
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 334, check with Delta Air Lines.

DL 334 lands a B+, 2 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 about 50 minutes on average. That is a workable record, not a spotless one. That rests on 362 flights, with a median arrival 3 minutes early.

On time

79.7%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

51 min

Across delayed arrivals only, not all flights

Cancelled

0.83%

National rate is 1.81%

1 hour+ late

3.3%

National rate is 8.1%

These figures cover 362 flights between July 2025 and June 2026. The median arrival is 3 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 334 flies

DL 334 flies DTW to LAS without a single fixed slot. Its most common scheduled departure was 08:59, used on 85 of 362 flights, with 08:58 (47 flights) and 09:15 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:5985 flights23.5%
Departs 08:5847 flights13.0%
Departs 09:1538 flights10.5%

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 08:59 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 334 runs 4 points worse at 79.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 334 next to DTW to LAS

Every carrier on DTW to LAS combined arrived on time 76.1% of the time across 2,843 flights, so DL 334 is 4 points ahead of it. Delta flew 1,897 flights on the same city pair under all its flight numbers, including this one, and those ran 75.9% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 2 points.

DL 334 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 334thin sample	362	79.7%	51 min	0.83%	B+
All Delta Air Lines on DTW–LAS	1,897	75.9%	60 min	0.53%	B+
All carriers on DTW–LAS	2,843	76.1%	56 min	0.49%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 334 quarter by quarter

Quarter by quarter DL 334 held fairly steady: 81.5% in Jul–Sep 2025, 76.1% in Oct–Dec 2025, 81.1% in Jan–Mar 2026 and 79.8% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights81.5%
Oct–Dec 202589 flights76.1%
Jan–Mar 202690 flights81.1%
Apr–Jun 202691 flights79.8%

Scale runs 70% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 334 did best on Wednesday at 90.4% on time and worst on Sunday at 72.5%. Each day rests on about 52 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 334 runs late

One category carries most of the weight here. Carrier accounts for 62% of the 3,723 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.

Carrier
62%
National Airspace System
31%
Extreme weather
6%
Late-arriving aircraft
2%

The largest share of delay minutes, 62%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,290 of the 3,723 delay minutes reported here. The split is drawn from 3,723 delay minutes reported on DL 334.

Cancellations are rare at 0.83%, 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 3.3% 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 1,749 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.

The same number turns up on one other city pair in the data, including LAS to DTW (183), but none flew often enough under DL 334 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DTW to LAS only.

One caution: this is a thin sample. 362 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 334

For a booking, read DL 334 as 79.7% on time with 0.83% cancelled over 362 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