WN3878 Flight Status Southwest Airlines: St. Louis to Phoenix (SWA3878)
Are you looking for the November 3rd, 2026 WN 3878 San Jose to Denver flight? Go to our WN3878 San Jose to Denver Flight Status page >
WN 3878 St. Louis to Phoenix Flight Status
Not scheduled today (November 3rd, 2026). Latest flight: September 30th, 2026 ; recent history is in the table below.
WN 3878 Flight Status & Schedule Southwest Airlines St. Louis to Phoenix
| Date | From | To | Departure | Arrival | Status | Details |
|---|---|---|---|---|---|---|
| Sep 30 | STL | PHX | 22:41 | 23:28 | Delayed | Track > |
| Sep 29 | STL | PHX | 20:57 | 21:46 | Landed | Track > |
| Sep 28 | STL | PHX | 21:16 | 22:05 | Landed | Track > |
| Sep 27 | STL | PHX | 21:59 | 22:51 | Landed Late | Track > |
| Sep 25 | STL | PHX | 21:49 | 22:38 | Landed Late | Track > |
| Sep 24 | STL | PHX | 21:19 | 22:04 | Landed | Track > |
| Sep 23 | STL | PHX | 21:27 | 22:17 | Landed Late | Track > |
| Sep 22 | STL | PHX | 21:03 | 21:59 | Landed | Track > |
| Sep 21 | STL | PHX | 21:57 | 22:56 | Delayed | Track > |
| Sep 20 | STL | PHX | 21:52 | 22:51 | Landed Late | Track > |
Southwest Airlines operates WN 3878 from St. Louis to Phoenix, a 2,027 km (1,259 mi) trip. With 3 h 15 min in the timetable and a usual flight time of about 2 h 50 min, it often makes up time. It is not flying today; the last flight was scheduled on 30 September 2026.
About WN 3878
- Distance
- 2,027 km (1,259 mi)
- Typical flight time
- 2 h 50 min
- On time
- 4 of the last 8
- Average delay when late
- 24 min
- Usually departs from
- Terminal 2
WN 3878 FAQ
- How long is the WN3878 flight?
- The timetable allows 3 h 15 min. St. Louis to Phoenix is 2,027 km (1,259 mi).
- How often is WN3878 late?
- 4 of the last 8 flights arrived 15 or more minutes late; when late, by 24 minutes on average.
- Which terminal does WN3878 use?
- It usually leaves from Terminal 2 at St. Louis Lambert International Airport (STL) and arrives at Terminal 4 at Phoenix Sky Harbor International Airport (PHX). Check the flight card above for today's terminal and gate.
- What other flight numbers does WN3878 have?
- Also listed as SWA3878 (Southwest Airlines' ICAO code) and WN 3878.
WN3878 and St. Louis STL to Phoenix PHX Flights
Other flights departing from St. Louis STL: WN3821, WN3843, WN3955, WN4166
Other flights arriving at Phoenix PHX: WN2796, WN2998, WN1637
All flights connecting St. Louis STL to Phoenix PHX.