Flight number record

DL 934

Delta Air Lines · Los Angeles to New York

Route: LAX → JFK
Departs: 06:00
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 934, check with Delta Air Lines.

DL 934 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 365 flights, with a median arrival 14 minutes early.

Set against the rest of the country, DL 934's record is 12 points better than the US average of 77.6%. That gap is worth roughly 118 fewer late arrivals for every thousand flights.

On time

89.4%

Arrivals under 15 minutes late, of 357 completed flights

Avg delay

118 min

Across delayed arrivals only, not all flights

Cancelled

2.19%

National rate is 1.81%

1 hour+ late

4.8%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 14 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 934 flies

DL 934 flies LAX to JFK without a single fixed slot. Its most common scheduled departure was 06:00, used on 215 of 365 flights, with 06:25 (70 flights) and 06:20 (64 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:00215 flights58.9%
Departs 06:2570 flights19.2%
Departs 06:2064 flights17.5%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 934 runs level with that at 89.4%. 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 934 next to LAX to JFK

Every carrier on LAX to JFK combined arrived on time 79.1% of the time across 10,287 flights, so DL 934 is 10 points ahead of it. Delta flew 3,358 flights on the same city pair under all its flight numbers, including this one, and those ran 81.6% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 8 points.

DL 934 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 934	365	89.4%	118 min	2.19%	A
All Delta Air Lines on LAX–JFK	3,358	81.6%	93 min	1.79%	B
All carriers on LAX–JFK	10,287	79.1%	92 min	2.04%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 934 quarter by quarter

Quarter by quarter DL 934 held fairly steady: 88.9% in Jul–Sep 2025, 89.1% in Oct–Dec 2025, 84.9% in Jan–Mar 2026 and 94.4% in Apr–Jun 2026. A spread of 10 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights88.9%
Oct–Dec 202592 flights89.1%
Jan–Mar 202690 flights84.9%
Apr–Jun 202691 flights94.4%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 934 ranged from 82.7% on Wednesday to 94.1% on Thursday. With about 52 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 934 runs late

One category carries most of the weight here. Carrier accounts for 90% of the 4,477 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
90%
National Airspace System
9%
Late-arriving aircraft
1%

The largest share of delay minutes, 90%, 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 4,049 of the 4,477 delay minutes reported here. The split is drawn from 4,477 delay minutes reported on DL 934.

Cancellations sit at 2.19% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.8% 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 2,475 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 365 flights under DL 934 in the data flew LAX to JFK. 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 934

For a booking, read DL 934 as 89.4% on time with 2.19% 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