Carrier route record

DLJFK→PHX

Delta Air Lines · New York to Phoenix

Flights: 917
Period: July 2025 to June 2026
Share of route: 31%
Carriers: 3

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

Delta on JFK to PHX carries a cancellation problem, not just a delay problem: 3.3% of scheduled flights never operate, against 1.8% nationally. Of the ones that do fly, close to three flights in four arrive on time, worth a C− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 917 flights. The strongest carrier on the route with a full sample, American Airlines, flew 1,524 at 82.0% on time.

The US average over the same twelve months is 77.6%, so there is little to separate Delta on JFK to PHX from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

73.9%

Arrivals under 15 minutes late, of 885 completed flights

Avg delay

61 min

Across delayed arrivals only, not all flights

Cancelled

3.27%

National rate is 1.81%

Whole route

77.9%

Every carrier on JFK to PHX, 2,972 flights

These figures cover 917 flights between July 2025 and June 2026. Beyond the headline rate, 9.2% 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

Delta against every carrier on JFK to PHX

Delta flew 917 of the 2,972 flights on JFK to PHX, about 31% of it. Its 73.9% on time is 4 points worse than the route as a whole, which runs 77.9%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from American at 82.0% to JetBlue at 73.0%.

The choice of carrier is not cosmetic here. American Airlines arrives on time 82.0% of the time; JetBlue Airways manages 73.0%. Sample sizes sit next to every figure, because a two-point gap across 531 flights means less than a ten-point one.

On-time performance by carrier on JFK to PHX
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlines	1,524	82.0%	93 min	2.23%	B
Delta Air Lines (this page)	917	73.9%	61 min	3.27%	C−
JetBlue Airways	531	73.0%	64 min	2.82%	C

American leads JetBlue by 9 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

Flight by flight

Delta flight numbers on JFK to PHX

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 20 points, against 9 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am—
8am–11am365 flights82.7%
11am–2pm—
2pm–5pm39 flights62.9%
5pm–8pm326 flights71.5%
8pm–5am187 flights63.2%

Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 82.7% of the time, against 62.9% for the afternoon window. That is 20 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 365 flights scheduled in it.

Across the year

Delta on JFK to PHX through the year

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

December is the weak month at 56.8% on time, against 87.2% in August. 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. April was the busiest month here, with 87 flights.

Across the week, Saturday is the strongest day at 79.3% on time and Sunday the weakest at 68.1%. 11 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Delta runs late on this route

One category carries most of the weight here. Carrier accounts for 43% of the 14,000 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
43%
National Airspace System
36%
Late-arriving aircraft
21%
Extreme weather
1%

36% 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 5,119 minutes out of 14,000, against a national NAS share of 21%. The split is drawn from 14,136 reported delay minutes.

The largest share of delay minutes, 43%, 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 6,028 of the 14,000 delay minutes reported here.

Cancellations run at 3.27%, against 1.81% nationally. That is about one flight in 30 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.2% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

At 2,153 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 87.0% on time across 917 flights, 13 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 13 points of difference.

One caution: this is a thin sample. 917 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 Delta on JFK to PHX

Put together: the delay figures matter less here than the 3.27% cancellation rate. A late arrival costs you about an hour; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 885 completed flights over 12 months sit behind that.

Where to go next

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