St Louis (STL) to Phoenix (PHX) flights
Southwest Airlines, American Airlines fly nonstop from St. Louis Lambert International Airport to Phoenix Sky Harbor International Airport, with about 44 flights a week in July 2026. The 1,262-mile flight takes about 3h 17m gate to gate.
- Distance
- 1,262 mi · 2,031 km
- Flight time
- 3h 17m
- Airlines
- 2
- Seats filled
- 82%
Airlines flying STL to PHX
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 31 | Boeing 737 MAX 8, Boeing 737-800, Boeing 737-700 / MAX 7 | 226,023 | 3h 14m |
| American Airlines | 13 | Airbus A320-100/200, Airbus A319, Boeing 737-800 | 71,256 | 3h 21m |
| Frontier AirlinesSeasonal or ended | n/a | Airbus A320neo, Airbus A321, Airbus A320-100/200 | 5,631 | 3h 30m |
| Envoy AirSeasonal or ended | n/a | Embraer E175 | 2,021 | 3h 34m |
| SkyWest AirlinesSeasonal or ended | n/a | Embraer E175 | 1,930 | 3h 28m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STL to PHX flight schedule
11 flight numbers flew this route in August 2026, 3 of them almost daily. The first usually leaves at 6:00am and the last at 8:45pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| WN 4593Southwest Airlines | 6:00am | 7:15am | 18 | 72% |
| WN 830Southwest Airlines | 7:35am | 8:50am | 8 | n/a |
| AA 2574American Airlines | 8:00am | 9:18am | 31 | 86% |
| WN 4668Southwest Airlines | 8:25am | 9:40am | 6 | n/a |
| WN 4464Southwest Airlines | 8:30am | 9:40am | 4 | n/a |
| WN 3877Southwest Airlines | 11:50am | 1:00pm | 24 | 88% |
| AA 590American Airlines | 2:29pm | 3:48pm | 4 | 67% |
| AA 3179American Airlines | 2:46pm | 4:00pm | 4 | 68% |
| WN 1587Southwest Airlines | 5:00pm | 6:15pm | 8 | n/a |
| WN 4380Southwest Airlines | 6:00pm | 7:15pm | 12 | 83% |
| WN 3878Southwest Airlines | 8:45pm | 9:55pm | 24 | 35% |
Is STL to PHX on time?
From September 2025 to August 2026, 75% of 2,309 flights arrived within 15 minutes of schedule and 0.5% were cancelled. Flights leaving around 5am were the most punctual (96%), those around 9pm the least (42%). Most delay time was caused by late-arriving aircraft (47%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 1,619 | 71% | 16 min | 0.3% |
| American Airlines | 637 | 83% | 31 min | 0.9% |
| Frontier Airlines | 53 | 83% | 37 min | 1.9% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 5am to 6am | 188 | 96% | |
| 6am to 7am | 107 | 93% | |
| 7am to 8am | 221 | 85% | |
| 8am to 9am | 273 | 90% | |
| 9am to 10am | 92 | 89% | |
| 10am to 11am | 56 | 82% | |
| 11am to 12pm | 72 | 81% | |
| 1pm to 2pm | 141 | 66% | |
| 2pm to 3pm | 402 | 74% | |
| 5pm to 6pm | 144 | 60% | |
| 6pm to 7pm | 139 | 60% | |
| 7pm to 8pm | 84 | 61% | |
| 8pm to 9pm | 128 | 57% | |
| 9pm to 10pm | 128 | 42% | |
| 10pm to 11pm | 58 | 50% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 165 | 20,081 | |
| September 2025 | 158 | 21,115 | |
| October 2025 | 200 | 27,092 | |
| November 2025 | 187 | 24,775 | |
| December 2025 | 206 | 28,548 | |
| January 2026 | 195 | 25,468 | |
| February 2026 | 193 | 24,783 | |
| March 2026 | 232 | 30,984 | |
| April 2026 | 208 | 25,332 | |
| May 2026 | 202 | 27,464 | |
| June 2026 | 165 | 23,671 | |
| July 2026 | 195 | 27,548 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.