Carrier route record
DLJFK→LAX
Delta Air Lines · New York to Los Angeles
- Flights
- 3,366
- Period
- September 2025 to August 2026
- Share of route
- 33%
- Carriers
- 4
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on JFK to LAX sits in the middle of the pack with a B. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 3,366 flights. The strongest carrier on the route with a full sample, American Airlines, flew 3,298 at 78.6% on time.
The US average over the same twelve months is 77.3%, so there is little to separate Delta on JFK to LAX from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
75.3%
Arrivals under 15 minutes late, of 3,278 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
2.55%
National rate is 1.89%
Whole route
75.4%
Every carrier on JFK to LAX, 10,285 flights
These figures cover 3,366 flights between September 2025 and August 2026. Beyond the headline rate, 8.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Delta against every carrier on JFK to LAX
Delta flew 3,366 of the 10,285 flights on JFK to LAX, about 33% of it. Its 75.3% on time is about level with the route as a whole at 75.4%. Ranked by on-time rate it is number two of four carriers on the route, where the range runs from American at 78.6% to Frontier at 70.8%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. American Airlines arrives on time 78.6% of the time; JetBlue Airways manages 72.5%. Sample sizes sit next to every figure, because a two-point gap across 3,480 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| American Airlines | 3,298 | 78.6% | 96 min | 2.61% | B |
| Delta Air Lines (this page) | 3,366 | 75.3% | 67 min | 2.55% | B |
| JetBlue Airways | 3,480 | 72.5% | 73 min | 3.19% | C− |
| Frontier Airlinesthin sample | 141 | 70.8% | 78 min | 2.13% | C |
JetBlue Airways cancels 3.2% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Flight by flight
Delta flight numbers on JFK to LAX
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Departure window
When Delta runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 10 points, against 6 points between the best and worst carrier.
- 5am–8am371 flights76.6%
- 8am–11am700 flights76.6%
- 11am–2pm621 flights81.5%
- 2pm–5pm657 flights73.1%
- 5pm–8pm782 flights71.5%
- 8pm–5am235 flights71.2%
Scale runs 65% to 85%.
The best window here is not the first bank but the 11am–2pm slot at 81.5% on time, ahead of 8pm–5am at 71.2%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 5pm–8pm window is the busiest, with 782 flights scheduled in it.
Across the year
Delta on JFK to LAX through the year
August is the worst month at 59.6% on time, 30 points below March, the best at 89.8%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. May was the busiest month here, with 306 flights.
Across the week, Tuesday is the strongest day at 79.7% on time and Sunday the weakest at 68.4%, a spread of 11 points.
Arrival by arrival
How late Delta on JFK to LAX runs when it is late
Delta on JFK to LAX often beats the schedule: 1,105 of 3,278 completed flights, 34%, arrived 15 minutes or more early. The 810 late arrivals split 304 under half an hour, 237 between 30 and 60 minutes, and 269 an hour or more.
- 15+ min early1,105 flights33.7%
- Within 15 min1,363 flights41.6%
- 15–29 min late304 flights9.3%
- 30–59 min late237 flights7.2%
- 1–2 hours late156 flights4.8%
- 2+ hours late113 flights3.4%
Scale runs 0% to 100%.
Share of 3,278 completed flights by arrival against schedule.
156 of 600 late departures made up the time and arrived on time, 26% of them. In the other direction, 366 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at LAX.
The worst days
Worst days for Delta on JFK to LAX
The latest arrival of the period was on 26 February 2026, 18 hours 27 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 February 2026 | 18 hours 27 minutes | Carrier |
| 7 September 2025 | 17 hours 39 minutes | Carrier |
| 6 November 2025 | 11 hours 4 minutes | Carrier |
| 16 June 2026 | 8 hours 58 minutes | Carrier |
| 26 June 2026 | 8 hours 17 minutes | Carrier |
Delay causes
Why Delta runs late on this route
Carrier accounts for 54% of the 55,000 delay minutes carriers reported here, and the remaining four split what is left.
- 54%Carrier
- 34%National Airspace System
- 9%Late-arriving aircraft
- 3%Extreme weather
- 0%Security
The largest share of delay minutes, 54%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 29,000 of the 55,000 delay minutes reported here. The split is drawn from 54,602 reported delay minutes.
34% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 18,000 minutes out of 55,000, against a national NAS share of 21%.
Cancellations run at 2.55%, against 1.89% nationally. That is about one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
8.2% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
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.
The return leg is a different operation and performs like one: it runs 79.4% on time across 3,367 flights, 4 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 4 points of difference.
The sample behind these figures is 3,366 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking Delta on JFK to LAX
Put together: the calendar is the biggest lever here, not the carrier or the hour. March runs 89.8% on time and August 59.6%, a swing of 30 points. If the dates move at all, move them out of August before you think about anything else. 3,278 completed flights over 12 months sit behind that.
Related
Where to go next
- JFK to LAX, every carrier
- Delta on LAX to JFK, the return leg
- American Airlines on JFK to LAX78.6%
- JetBlue Airways on JFK to LAX72.5%
- Frontier Airlines on JFK to LAX70.8%
- Delta Air Lines network-wide record
- John F. Kennedy International (JFK) delay statistics
- Los Angeles International (LAX) delay statistics
- The US routes with the most cancellations
- The best time of day to fly, according to 7.05 million flight records
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.