Best Time to Fly TWF to SLC: On-Time Stats by Hour & Airline
Joslin Field - Magic Valley Regional → Salt Lake City International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 95.4% of Twin Falls (TWF) to Salt Lake City (SLC) flights arrived on time (831 scheduled flights). That is 17.8 points above the national average of 77.6%.
SkyWest Airlines was the only reporting airline with regular flights on this route.
September has been the best month (98% on time) and Thursday the weakest day of the week (91%).
0.5% of flights were cancelled, versus 1.8% nationally.
TWF 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 |
|---|---|---|---|---|
| SkyWest Airlines | 95.4% | 107 min | 0.5% | 831 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly TWF to SLC
On-time arrival % by scheduled departure hour (local time), 1,528 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 95.7% | 0.3% | 725 |
| 9am–10am | Limited data | 5 | |
| 11am–12pm | 95.4% | 0.0% | 131 |
| 12pm–1pm | Limited data | 23 | |
| 1pm–2pm | 90.8% | 0.0% | 250 |
| 3pm–4pm | 94.9% | 0.5% | 393 |
| 7pm–8pm | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on TWF 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 | 24 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 96.2% | +1.8 pts | 0.0% | 52 |
| Summer peak (Jun 15 - Aug 15) | 95.3% | +1.0 pts | 0.0% | 280 |
| All other days | 94.3% | — | 0.3% | 1,172 |
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).