St. Louis Lambert International ⇄ Phoenix Sky Harbor International STL–PHX
Airlines flew 4,624 flights between St. Louis Lambert International STL in St Louis, MO and Phoenix Sky Harbor International PHX in Phoenix, AZ in the twelve months to July 2026, both directions together: 600,911 passengers in 749,350 seats, 80% of them filled, and 556,355 pounds of freight. 1,262 miles, about 177 minutes in the air, on 6 airlines: Southwest Airlines Co. (3,236), American Airlines Inc. (1,164), Frontier Airlines Inc. (104), Envoy Air (61) and 2 more. Planning to fly it yourself? The weather and winds along this route right now.
Flights by month both directions
By month, as a table
| flights | |
|---|---|
| 1/25 | 367 |
| 2/25 | 361 |
| 3/25 | 376 |
| 4/25 | 417 |
| 5/25 | 414 |
| 6/25 | 341 |
| 7/25 | 331 |
| 8/25 | 330 |
| 9/25 | 315 |
| 10/25 | 400 |
| 11/25 | 374 |
| 12/25 | 415 |
| 1/26 | 393 |
| 2/26 | 385 |
| 3/26 | 470 |
| 4/26 | 415 |
| 5/26 | 405 |
| 6/26 | 326 |
| 7/26 | 396 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 41,921 |
| 2/25 | 40,103 |
| 3/25 | 45,040 |
| 4/25 | 47,506 |
| 5/25 | 49,161 |
| 6/25 | 40,546 |
| 7/25 | 39,222 |
| 8/25 | 39,828 |
| 9/25 | 40,761 |
| 10/25 | 52,627 |
| 11/25 | 49,394 |
| 12/25 | 54,582 |
| 1/26 | 50,333 |
| 2/26 | 48,348 |
| 3/26 | 63,115 |
| 4/26 | 50,489 |
| 5/26 | 53,637 |
| 6/26 | 46,209 |
| 7/26 | 51,588 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Southwest Airlines Co. WN | 3,236 | 445,427 | 81% | scheduled passenger service |
| American Airlines Inc. AA | 1,164 | 136,070 | 79% | scheduled passenger service |
| Frontier Airlines Inc. F9 | 104 | 11,740 | 59% | scheduled passenger service |
| Envoy Air MQ | 61 | 3,808 | 82% | scheduled passenger service |
| SkyWest Airlines Inc. OO | 55 | 3,576 | 86% | scheduled passenger service |
| United Air Lines Inc. UA | 4 | 290 | 37% | charter passenger service, scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Boeing B737 Max 800 | 1,653 | 175 | 231,018 |
| Boeing 737-800 | 1,341 | 174 | 183,247 |
| Boeing 737-700/700LR/Max 7 | 552 | 140 | 68,367 |
| Airbus Industrie A320-100/200 | 432 | 150 | 53,210 |
| Airbus Industrie A319 | 414 | 128 | 44,280 |
| Embraer ERJ-175 | 115 | 76 | 7,362 |
| Airbus Industrie A320-200n | 80 | 186 | 9,290 |
| Airbus Industrie A321-200n | 23 | 207 | 2,568 |
| Airbus Industrie A321Neoxlr | 10 | 190 | 1,343 |
| Boeing B737 Max 900 | 2 | 179 | 141 |
| Boeing 757-300 | 1 | 234 | 63 |
| Canadair RJ-700 | 1 | 65 | 22 |
STL → PHX this direction alone · flown January 2025 to July 2026
2,306 flights of 2,315 scheduled, 306,861 passengers in 374,138 seats, 301,327 pounds of freight. Southwest Airlines Co. 1,615; American Airlines Inc. 582; Frontier Airlines Inc. 52; Envoy Air 30; SkyWest Airlines Inc. 27.
PHX → STL this direction alone · flown January 2025 to July 2026
2,318 flights of 2,317 scheduled, 294,050 passengers in 375,212 seats, 255,028 pounds of freight. Southwest Airlines Co. 1,621; American Airlines Inc. 582; Frontier Airlines Inc. 52; Envoy Air 31; SkyWest Airlines Inc. 28; United Air Lines Inc. 4.
Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: St. Louis Lambert International STL and Phoenix Sky Harbor International PHX; all routes.