Route reliability record

JFK→LAX

New York to Los Angeles

Flights: 10,284
Period: July 2025 to June 2026
Distance: 2,475 mi
Carriers: 4

This route lands a B, level with the national rate of 77.6%. Roughly one flight in four 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 10,284 flights, of which American Airlines flew 3,237 at 80.3% on time.

American Airlines is the most reliable of the three carriers covered here at 80.3% on time across 3,237 flights.

On time

77.6%

Arrivals under 15 minutes late, of 10,074 completed flights

Avg delay

77 min

Across delayed arrivals only, not all flights

Cancelled

1.94%

National rate is 1.81%

Best carrier

American

80.3% on time across 3,237 flights

These figures cover 10,000 flights between July 2025 and June 2026. Beyond the headline rate, 8.5% 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: 5 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.

On-time performance by carrier on JFK to LAX
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlines	3,237	80.3%	95 min	2.04%	B
Delta Air Lines	3,358	77.5%	71 min	1.79%	B
JetBlue Airways	3,486	75.6%	69 min	2.01%	B
Frontier Airlinesthin sample	203	70.4%	68 min	1.48%	C

No carrier stands out. American tops the table at 80.3%, 5 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 18 points, against 5 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am1,717 flights85.8%
8am–11am1,823 flights80.9%
11am–2pm1,588 flights81.8%
2pm–5pm1,776 flights77.6%
5pm–8pm1,987 flights71.1%
8pm–5am1,393 flights67.5%

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 85.8% of the time, against 67.5% for the overnight window. That is 18 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5pm–8pm window is the busiest, with 1,987 flights scheduled in it.

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.

Darker means more delays. Figures are on-time percentages.March best, December worst

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. July was the busiest month here, with 922 flights.

Across the week, Tuesday is the strongest day at 81.6% on time and Sunday the weakest at 71.1%. 11 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 173,000 reported delay minutes.

Carrier
36%
Late-arriving aircraft
34%
National Airspace System
26%
Extreme weather
4%
Security
0%

34% 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 173,000 reported delay minutes here, that single category outweighs weather by 9 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 172,683 reported delay minutes.

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 62,000 of the 173,000 delay minutes reported here.

Cancellations sit at 1.94% against a national 1.81%, which is ordinary. Diversions add another 0.11%.

Connections and stage length

What a delay here actually costs

8.5% 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 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 79.1% on time across 10,287 flights, within 2 points 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 10,284 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. 10,074 completed flights over 12 months sit behind that.

Common questions

JFK to LAX questions

How often is JFK to LAX delayed?

Roughly one flight in four arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 22.4% of the 10,284 flights in this analysis, against 22.4% 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 80.3% on time across 3,237 flights. JetBlue Airways is at the other end on 75.6%, a gap of 5 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 85.8% on time. The 8pm–5am window is the weakest at 67.5%, 18 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.

Where to go next

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, July 2025 to June 2026. Updated monthly. How this data is collected.

Key figures