Best Time to Fly RDU to SLC: On-Time Stats by Hour & Airline
Raleigh-Durham International → Salt Lake City International
Data through July 2026 · Last updated October 18, 2026
383 flights were scheduled from Raleigh/Durham (RDU) to Salt Lake City (SLC) in the last 12 months, and 84.1% of those that flew arrived on time, 6.5 points above the US average of 77.6%.
Delta Air Lines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (88% on time) and December the worst month (74%).
The cancellation rate was 1.3% (US average 1.8%).
RDU 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 | 84.1% | 60 min | 1.3% | 383 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly RDU to SLC
On-time arrival % by scheduled departure hour (local time), 809 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 3 | |
| 6am–7am | Limited data | 4 | |
| 7am–8am | 86.8% | 2.1% | 287 |
| 12pm–1pm | Limited data | 3 | |
| 1pm–2pm | Limited data | 1 | |
| 4pm–5pm | Limited data | 11 | |
| 5pm–6pm | Limited data | 9 | |
| 6pm–7pm | 85.1% | 0.0% | 431 |
| 7pm–8pm | 72.4% | 0.0% | 58 |
| 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 RDU 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) | Limited data | 14 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 79.0% | -8.6 pts | 0.0% | 38 |
| Summer peak (Jun 15 - Aug 15) | 78.5% | -9.1 pts | 1.1% | 188 |
| All other days | 87.6% | — | 0.7% | 569 |
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).