Route Reliability
Phoenix → St. Louis
PHX–STL · 1,262 miles · Phoenix Sky Harbor International Airport to St. Louis Lambert International Airport
- 80%
- Arrive within 15 minutes
- 6 min
- Average arrival delay
- 0.3%
- Cancelled
- 2,289
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.American Airlines82%635 flights
- 2.Southwest Airlines79%1,601 flights
Not enough history to rank: Frontier Airlines (53 flights). We rank airlines only after 100 flights on the route.
What the data says
Morning flights do better here.
PHX–STL flights departing between 3–6 AM arrived on time 94% of the time, versus 70% between 3–6 PM.
Monday is the weak spot.
PHX–STL flights arrived on time 86% of the time on Wednesdays. On Mondays: 75%.
American Airlines has a slight edge here.
American Airlines arrived on time 82% of the time on this route; Southwest Airlines managed 79%.
It basically never cancels.
Out of 2,289 scheduled flights, only 0.3% were cancelled.
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
- Mon75%(343 flights)
- Tue83%(318 flights)
- Wed86%(316 flights)
- Thu79%(335 flights)
- Fri81%(348 flights)
- Sat79%(252 flights)
- Sun75%(359 flights)
- 3–6 AM94%(206 flights)
- 6–9 AM91%(420 flights)
- 9 AM–12 PM84%(335 flights)
- 12–3 PM78%(414 flights)
- 3–6 PM70%(279 flights)
- 6–9 PM71%(604 flights)
- 9 PM–12 AM77%(13 flights)
Jun 80% → May 78% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 80% | 171 |
| July 2025 | 78% | 163 |
| August 2025 | 81% | 163 |
| September 2025 | 83% | 157 |
| October 2025 | 81% | 199 |
| November 2025 | 77% | 187 |
| December 2025 | 75% | 207 |
| January 2026 | 86% | 197 |
| February 2026 | 87% | 192 |
| March 2026 | 75% | 233 |
| April 2026 | 77% | 203 |
| May 2026 | 78% | 199 |
Keep nerding
Based on 2,289 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.