Route reliability record
JFK→LAX
New York to Los Angeles
- Flights
- 10,337
- Period
- June 2025 to May 2026
- Distance
- 2,475 mi
- Carriers
- 4
This route lands a B, level with the national rate of 77.4%. Roughly one flight in five arrive 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 10,337 flights, of which American Airlines flew 3,239 at 80.1% on time.
American Airlines is the most reliable of the three carriers covered here at 80.1% on time across 3,239 flights.
Key figures
On time
78.1%
Arrivals under 15 minutes late, of 10,133 completed flights
Avg delay
79 min
Across delayed arrivals only, not all flights
Cancelled
1.88%
National rate is 1.80%
Best carrier
American
80.1% on time across 3,239 flights
These figures cover 10,000 flights between June 2025 and May 2026. Beyond the headline rate, 8.4% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Which airline is most reliable on JFK to LAX
The three carriers here are closely matched: 4 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| American Airlines | 3,239 | 80.1% | 98 min | 1.95% | B |
| Delta Air Lines | 3,357 | 78.2% | 74 min | 1.76% | B |
| JetBlue Airways | 3,508 | 76.5% | 69 min | 1.97% | B |
| Frontier Airlinesthin sample | 233 | 71.2% | 67 min | 1.29% | C |
No carrier stands out. American tops the table at 80.1%, 4 points clear of the bottom, which is inside the range this kind of sample moves year to year.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 19 points, against 4 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am1,729 flights86.3%
- 8am–11am1,835 flights82.0%
- 11am–2pm1,579 flights82.4%
- 2pm–5pm1,805 flights77.8%
- 5pm–8pm2,004 flights71.3%
- 8pm–5am1,385 flights67.8%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 86.3% of the time, against 67.8% for the overnight window. That is 19 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on.
Across the year
When delays peak on this route
This route's year swings by 17 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
December is the weak month at 69.7% on time, against 87.0% in March. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days.
Across the week, Tuesday is the strongest day at 81.1% on time and Sunday the weakest at 73.2%. 8 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 175,000 reported delay minutes.
- 36%Carrier
- 33%Late-arriving aircraft
- 26%National Airspace System
- 4%Extreme weather
- 0%Security
The largest share of delay minutes, 36%, 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 63,000 of the 175,000 delay minutes reported here.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 86.3% on time here.
Cancellations sit at 1.88% against a national 1.80%, which is ordinary. Diversions add another 0.10%.
Connections and stage length
What a delay here actually costs
8.4% of arrivals land an hour or more late, close to the national 8.2%. 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 are the a little over an hour kind, 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 runs 78.6% on time across 10,337 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 10,337 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 this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. March runs 87.0% on time and December 69.7%, a swing of 17 points. If the dates move at all, move them out of December before you think about anything else.
Common questions
JFK to LAX questions
How often is JFK to LAX delayed?
Roughly one flight in five arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 21.9% of the 10,337 flights in this analysis, against 22.6% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on JFK to LAX?
American Airlines leads at 80.1% on time across 3,239 flights. JetBlue Airways is at the other end on 76.5%, a gap of 4 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on JFK to LAX?
The 5am–8am departure window is the strongest at 86.3% on time. The 8pm–5am window is the weakest at 67.8%, 19 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are December delays on JFK to LAX?
December is the weakest month at 69.7% on time, compared with 87.0% in March. Across the year that is 17 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- LAX to JFK — the return legseparate record
- John F. Kennedy International (JFK) delay statistics
- Los Angeles International (LAX) delay statistics
- American Airlines on-time record80.1%
- Delta Air Lines on-time record78.2%
- JetBlue Airways on-time record76.5%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Direction matters. JFK to LAX and LAX to JFK are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.