St Louis to Phoenix (STL–PHX) — Airlines, Schedules & Connections
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No nonstop flights on this route. connecting options below.
STL–PHX is served by 4 airlines with nonstop service. Southwest Airlines, American Airlines and Alaska Airlines lead the route. The flight covers 1,259 miles in approximately 3h 23m. Beyond nonstop, 81 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| WN Southwest Airlines | 71 | 737, 738, 73H, 7M8, 7S7, B38M | 3h25-4h41 | – | – | |
| AA American Airlines | 28 | 319, 320, E75 | 3h23-4h09 | Oneworld | – | |
| AS Alaska Airlines | 7 | 320 | 3h40 | Oneworld | – | |
| F9 Frontier | 5 | 32N | 3h35-3h41 | – | – |
Weekly Schedule Pattern
Connection Landscape
On-Time Performance
Travel Essentials
STL: EDT · PHX: MST
When it's 6:00 PM in St Louis, it's 3:00 PM in Phoenix.
PHX Sky Train (free, 24h) connects T3 and T4 to the 44th Street/Washington light rail station in 5 minutes. Valley Metro Rail reaches downtown Phoenix in 20 minutes ($2). Uber and Lyft pick up at Ground Transportation on the lower level; follow signs. Taxis are metered; downtown Phoenix costs $20–30.Rental car agencies are consolidated in the Rental Car Center; the Sky Train connects there from both terminals without going to the street. For Scottsdale, Tempe, or Chandler, ride-hails are practical ($25–50). Express buses serve some suburban destinations.
Hot desert climate. Summers (June–September) are extreme. Daytime temperatures regularly exceed 43°C, occasionally reaching 48°C. Heat alone rarely cancels flights, but density altitude affects small aircraft performance. Monsoon season (July–mid-September) brings dramatic dust storms (haboob) that close the airport when they hit, plus intense flash-flooding thunderstorms that ground departures for 30–90 minutes.
Winters are exceptionally mild (10–22°C) with virtually no precipitation and near-constant sunshine. PHX has one of the lowest weather cancellation rates of any major US airport from November through April. Spring and fall are pleasant; late May and early June are hot and dry before monsoon arrives.
STL–PHX Quick Facts
Frequently Asked Questions
Flights from STL to PHX
St. Louis Lambert International Airport (STL) and Phoenix Sky Harbor International Airport (PHX) are connected by nonstop service from American Airlines, Alaska Airlines, Frontier and Southwest Airlines. With 111 weekly departures, this is a heavily served route.
STL to PHX Flight Duration and Schedule
Nonstop flight time from STL to PHX ranges from 3 hours 23 minutes to 4 hours 41 minutes. The route covers a distance of 1,259 miles (2,026 km). There are approximately 111 weekly flights outbound and 111 return, totaling 222 flights per week in both directions.
Connecting Options and Alternatives
81 one-stop connections are available, with the fastest taking approximately 5 hours via ICT. Two-stop connections are also available via intermediate hubs.