WN4128Southwest Airlines · STL → TPA
live · 20m ago
Route confirmed Southwest Airlines

WN4128 St LouisSTL · 05:45 TampaTPA · 09:00

WN4128 by Southwest Airlines flies from St Louis (STL) to Tampa (TPA).

Right nowNext departure tomorrow Operates daily
05:00

scheduled from STL

Typical gate push+6 minmedian posted departure
Typical arrival−15 minmedian over 3 operations
Wins back in air~21 minmedian gate push vs arrival · how planes make up time → Cancellation0 in 12tracked operations · cancellation odds calculator →

Where the minutes go

last 7 operations · gate push → arrival
0+30+60+90 min
10-28
+2 gate · −15 arrival
10-27
+8 gate
10-26
+6 gate
10-25
−1 gate
10-23
+10 gate · −16 arrival
10-22
+24 gate
10-21
+3 gate

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The last 30 days

arrival outcome per operation

median arrival −15 min · 0 cancelled · 12 operations tracked

The route today

live boards
STLSt LouisOn-time likelySTL delay board →
TPATampaOn-time likelyTPA delay board →
STL→TPAevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
41%Chance of 15+ min delay
1.5%Chance of cancellation
+9 minAvg hub delay right now

Conditions at STL and TPA are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

Tomorrow on this route

Forecast

St Louis to Tampa with Southwest Airlines · Thu 29 Oct, local date

Outlook: about usual
Chance a departure is cancelled
0.3%0.9× usual
Chance a departure leaves 60+ min late
8.6%1.2× usual

Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 3 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other St Louis to Tampa flights today

same route · Southwest Airlines
WN299departs 06:55
WN3100departs 10:15
WN4129departs 10:25
WN5062departs 14:10
WN3370departs 16:50
WN4130departs 18:40

If WN4128 is cancelled, these are the other Southwest Airlines nonstop flights from St Louis to Tampa on the same day, with scheduled departure times in STL local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How WN4128 actually runs

Pro Flight Search has tracked every published board update for WN4128 across the STL and TPA boards: schedule changes, gate pushes and actual clocks. Usually lands ~11 min early. Based on 3 confirmed landings · 3/3 within 15 min of schedule.

The verdict above is that record speaking, so it reflects how WN4128 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
10-28STL 05:45 05:47 (+2)TPA 09:00 08:45 (−15)
10-27STL 05:45 05:53 (+8)TPA
10-26STL 05:00 05:06 (+6)TPA
10-25STL 05:45 05:44 (−1)TPA
10-23STL 05:00 05:10 (+10)TPA 08:15 07:59 (−16)
10-22STL 05:00 05:24 (+24)TPA
10-21STL 05:45 05:48 (+3)TPA
10-20STL 05:45 05:48 (+3)TPA
10-19STL 05:00 05:05 (+5)TPA
10-18STL 05:45 05:47 (+2)TPA
10-16STL 05:00 05:13 (+13)TPA 08:15 08:17 (+2)
10-15STL 05:00 05:06 (+6)TPA

Aircraft

Recent tails: N8828L, N8913S, N8865L, N8806Q.

Board clocks recorded as STL and TPA published them.

Planning around WN4128? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — WN4128 St Louis to Tampa on-time performance, measured from the STL and TPA airport boards.

Canonical URL
https://proflightsearch.com/flight/WN4128
How we measure this →