Best Time to Fly JFK to SLC: On-Time Stats by Hour & Airline
John F. Kennedy International → Salt Lake City International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 78.5% of New York (JFK) to Salt Lake City (SLC) flights arrived on time (1,928 scheduled flights). That is 0.9 points above the national average of 77.6%.
Among 2 airlines, Delta Air Lines led with 80.8% on time and JetBlue was last with 69.3%.
Over 24 months, Tuesday was the most reliable day (84% on time) and June the worst month (71%).
The cancellation rate was 2.1% (US average 1.8%).
JFK to SLC on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Lines | 80.8% | 64 min | 1.9% | 1,535 |
| JetBlue | 69.3% | 65 min | 3.0% | 393 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly JFK to SLC
On-time arrival % by scheduled departure hour (local time), 3,889 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 88.6% | 1.4% | 649 |
| 7am–8am | 87.6% | 0.0% | 97 |
| 8am–9am | 60.0% | 0.0% | 35 |
| 9am–10am | 81.4% | 2.7% | 73 |
| 10am–11am | 81.8% | 1.4% | 279 |
| 11am–12pm | 82.4% | 0.7% | 441 |
| 12pm–1pm | 91.2% | 5.6% | 36 |
| 1pm–2pm | 82.0% | 0.0% | 139 |
| 3pm–4pm | 82.5% | 0.5% | 189 |
| 4pm–5pm | 81.3% | 1.1% | 477 |
| 5pm–6pm | 64.6% | 0.0% | 79 |
| 6pm–7pm | 72.5% | 2.0% | 943 |
| 7pm–8pm | 69.6% | 1.8% | 450 |
| 8pm–9pm | Limited data | 2 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on JFK to SLC
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 90.5% | +9.7 pts | 1.6% | 64 |
| Christmas & New Year (Dec 20 - Jan 3) | 69.5% | -11.3 pts | 2.6% | 192 |
| Summer peak (Jun 15 - Aug 15) | 71.9% | -9.0 pts | 2.9% | 620 |
| All other days | 80.8% | — | 1.0% | 3,013 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).