Southwest Airlines
Is WN4437 delayed?
Each route and date is shown separately. Confirm that both airports match your booking.
Service date: · Scheduled departure date (America/Los_Angeles)
Arrived
39 min late
Official source · Updated
Departure
San Diego
SAN
Actual
Scheduled 18:58
Sep 18
Arrival
Las Vegas
LAS
Actual
Scheduled 19:53
Sep 18
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
Service date: · Scheduled departure date (UTC)
Arrived
21 min late
Official source · Updated
Departure
Sacramento
SMF
Actual
Scheduled 23:42
Sep 19
Arrival
San Diego
SAN
Actual
Scheduled 17:54
Sep 18
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
SMFSAN
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 39 min late
SAN → LAS
- 21 min late
SMF → SAN
- 71 min late
SAN → LAS
- 27 min late
SMF → SAN
- 22 min late
SAN → LAS
Flight history and details
Aug 21, 2026 — Sep 20, 2026
- Observed arrivals
- 17
- Arrivals over 15 minutes late
- 16
- Observed cancellations
- 0
- Observed occurrences
- 18
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 18, 2026Arrived | San Diego | Las Vegas | 39 | |
| Sep 18, 2026Arrived | Sacramento | San Diego | 21 | |
| Sep 17, 2026Arrived | San Diego | Las Vegas | 71 | |
| Sep 17, 2026Arrived | Sacramento | San Diego | 27 | |
| Sep 14, 2026Arrived | San Diego | Las Vegas | 22 | |
| Sep 14, 2026Arrived | Sacramento | San Diego | 13 | |
| Sep 11, 2026Arrived | San Diego | Las Vegas | 62 | |
| Sep 11, 2026Arrived | Sacramento | San Diego | 58 | |
| Sep 10, 2026Arrived | San Diego | Las Vegas | 24 | |
| Sep 7, 2026Arrived | San Diego | Las Vegas | 126 | |
| Sep 8, 2026Arrived | Sacramento | San Diego | 63 | |
| Sep 4, 2026Arrived | San Diego | Las Vegas | 205 | |
| Sep 4, 2026Arrived | Sacramento | San Diego | 209 | |
| Aug 31, 2026Arrived | San Diego | Las Vegas | 41 | |
| Aug 28, 2026Arrived | San Diego | Las Vegas | 33 | |
| Aug 27, 2026Arrived | San Diego | Las Vegas | 69 | |
| Aug 24, 2026Arrived | San Diego | Las Vegas | 16 |