Route Reliability
Salt Lake City → St. Louis
SLC–STL · 1,156 miles · Salt Lake City International Airport to St. Louis Lambert International Airport
- 85%
- Arrive within 15 minutes
- 0 min
- Average arrival delay
- 0.6%
- Cancelled
- 989
- Flights in the data
Data through May 2026.
Airlines on this route
- Delta Air Lines85% on time · 980 flights
- Southwest Airlines100% on time · 9 flights
Too little history on this route to call a winner. We rank airlines only after 100 flights each.
What the data says
The late departure is the smart one here.
SLC–STL flights departing between 9 PM–12 AM arrived on time 100% of the time, versus 76% between 6–9 PM.
Sunday scaries are real for this one.
SLC–STL flights arrived on time 90% of the time on Wednesdays. On Sundays: 76%.
Ticking up lately.
SLC–STL flights arrived on time 90% of the time over the last three months in the data, compared with 84% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon87%(147 flights)
- Tue90%(144 flights)
- Wed90%(144 flights)
- Thu83%(144 flights)
- Fri84%(145 flights)
- Sat84%(113 flights)
- Sun76%(145 flights)
- 9 AM–12 PM90%(372 flights)
- 12–3 PM87%(192 flights)
- 3–6 PM84%(147 flights)
- 6–9 PM76%(261 flights)
- 9 PM–12 AM100%(10 flights)
Jun 85% → May 88% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 85% | 89 |
| July 2025 | 82% | 92 |
| August 2025 | 82% | 88 |
| September 2025 | 79% | 81 |
| October 2025 | 89% | 88 |
| November 2025 | 83% | 83 |
| December 2025 | 81% | 78 |
| January 2026 | 89% | 61 |
| February 2026 | 82% | 65 |
| March 2026 | 94% | 86 |
| April 2026 | 86% | 85 |
| May 2026 | 88% | 86 |
Keep nerding
Based on 989 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.