Southwest Airlines
Is WN3877 delayed?
Each route and date is shown separately. Confirm that both airports match your booking.
Service date: · Scheduled departure date (America/Phoenix)
No live update yet
Check with your airline for the latest status.
Update time unavailable
Departure
Phoenix
PHX
Scheduled
Sep 22
Arrival
Sacramento
SMF
Scheduled
Sep 22
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Service date: · Scheduled arrival date; departure time unavailable (America/Phoenix)
17 min late
This update may be out of date. Check with your airline.
Update time unavailable
Departure
St Louis
STL
Scheduled
Not available
Arrival
Phoenix
PHX
Estimated
Sep 22
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Not available
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Actual
- Not available
Service date: · Scheduled departure date (UTC)
7 min early
Official source · Updated
Departure
Chicago
MDW
Scheduled
Sep 22
Arrival
St Louis
STL
Actual
Sep 22
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 7 min early
MDW → STL
- 30 min late
STL → PHX
- 11 min early
LAS → CMH
- 3 min early
STL → PHX
- 10 min early
STL → PHX
Flight history and details
Aug 23, 2026 — Sep 22, 2026
- Observed arrivals
- 29
- Arrivals over 15 minutes late
- 6
- Observed cancellations
- 0
- Observed occurrences
- 31
Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 22, 2026Arrived | Chicago | St Louis | -7 | |
| Sep 21, 2026Arrived | St Louis | Phoenix | 30 | |
| Sep 20, 2026Arrived | Las Vegas | Columbus | -11 | |
| Sep 19, 2026Arrived | St Louis | Phoenix | -3 | |
| Sep 18, 2026Arrived | St Louis | Phoenix | -10 | |
| Sep 17, 2026Arrived | St Louis | Phoenix | -12 | |
| Sep 16, 2026Arrived | Phoenix | Sacramento | 67 | |
| Sep 16, 2026Arrived | St Louis | Phoenix | 54 | |
| Sep 16, 2026Arrived | Chicago | St Louis | 1 | |
| Sep 15, 2026Arrived | Phoenix | Sacramento | 24 | |
| Sep 15, 2026Arrived | St Louis | Phoenix | 47 | |
| Sep 15, 2026Arrived | Chicago | St Louis | -26 | |
| Sep 14, 2026Arrived | St Louis | Phoenix | -2 | |
| Sep 12, 2026Arrived | St Louis | Phoenix | -13 | |
| Sep 11, 2026Arrived | St Louis | Phoenix | -22 | |
| Sep 10, 2026Arrived | St Louis | Phoenix | -15 | |
| Sep 9, 2026Arrived | Phoenix | Sacramento | -13 | |
| Sep 9, 2026Arrived | St Louis | Phoenix | -25 | |
| Sep 8, 2026Arrived | Phoenix | Sacramento | -4 | |
| Sep 8, 2026Arrived | Chicago | Phoenix | -11 | |
| Sep 8, 2026Arrived | Chicago | St Louis | 0 | |
| Sep 7, 2026Arrived | St Louis | Phoenix | -20 | |
| Sep 6, 2026Arrived | Las Vegas | Columbus | -15 | |
| Sep 5, 2026Arrived | St Louis | Phoenix | -22 | |
| Sep 4, 2026Arrived | St Louis | Phoenix | -13 | |
| Sep 1, 2026Arrived | Phoenix | Sacramento | -4 | |
| Aug 30, 2026Arrived | Las Vegas | Columbus | 28 | |
| Aug 26, 2026Arrived | Phoenix | Sacramento | 0 | |
| Aug 25, 2026Arrived | Phoenix | Sacramento | -18 |