Route Reliability
St. Louis → Phoenix
STL–PHX · 1,262 miles · St. Louis Lambert International Airport to Phoenix Sky Harbor International Airport
- 77%
- Arrive within 15 minutes
- 11 min
- Average arrival delay
- 0.4%
- Cancelled
- 2,287
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.American Airlines83%633 flights
- 2.Southwest Airlines75%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.
STL–PHX flights departing between 3–6 AM arrived on time 96% of the time, versus 54% between 9 PM–12 AM.
Friday comes out ahead.
A small edge: 80% on time on Fridays against 73% on Sundays.
American Airlines runs this route best.
American Airlines arrived on time 83% of the time on this route; Southwest Airlines managed 75%.
Slipping a little lately.
STL–PHX flights arrived on time 77% of the time over the last three months in the data, compared with 81% 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
- Mon76%(351 flights)
- Tue79%(320 flights)
- Wed79%(315 flights)
- Thu77%(329 flights)
- Fri80%(348 flights)
- Sat78%(253 flights)
- Sun73%(357 flights)
- 3–6 AM96%(213 flights)
- 6–9 AM87%(548 flights)
- 9 AM–12 PM84%(241 flights)
- 12–3 PM78%(486 flights)
- 3–6 PM68%(231 flights)
- 6–9 PM63%(389 flights)
- 9 PM–12 AM54%(165 flights)
Jun 74% → May 74% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 74% | 168 |
| July 2025 | 77% | 166 |
| August 2025 | 76% | 165 |
| September 2025 | 78% | 156 |
| October 2025 | 76% | 199 |
| November 2025 | 70% | 186 |
| December 2025 | 73% | 206 |
| January 2026 | 86% | 194 |
| February 2026 | 83% | 193 |
| March 2026 | 79% | 232 |
| April 2026 | 80% | 207 |
| May 2026 | 74% | 201 |
Keep nerding
Based on 2,287 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.