WN3945Southwest Airlines · SMF → MDW
live · 27m ago
Route confirmed Southwest Airlines

WN3945 SacramentoSMF · 23:55 ChicagoMDW · 05:50

WN3945 by Southwest Airlines flies from Sacramento (SMF) to Chicago (MDW) for the Sat, Oct 17 departure.

Right nowLanded in Chicago · today
07:00

arrived at MDW · 70 min late

⚖ WN3945 typically leaves +16 and lands −3. The air wins minutes back.
Typical gate push+16 minmedian posted departure
Typical arrival−3 minmedian over 13 operations
Wins back in air~19 minmedian gate push vs arrival · how planes make up time → Cancellation0 in 13tracked operations · cancellation odds calculator →

Where the minutes go

last 7 operations · gate push → arrival
0+30+60+90 min
10-17
+82 gate · +70 arrival
10-16
+82 gate · +70 arrival
10-15
+16 gate · −2 arrival
10-14
+31 gate · +3 arrival
10-13
+14 gate · −5 arrival
10-12
+11 gate · −20 arrival
10-11
+41 gate · +10 arrival

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 −3 min · 0 cancelled · 13 operations tracked

The route today

live boards
SMFSacramentoOn-time likelySMF delay board →
MDWChicagoOn-time likelyMDW delay board →
SMF→MDWevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
42%Chance of 15+ min delay
0.7%Chance of cancellation
+9 minAvg hub delay right now

Conditions at SMF and MDW 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 →

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 Sacramento to Chicago flights today

same route · Southwest Airlines
WN298departs 05:15
WN2090departs 05:45
WN3944departs 06:15
WN3265departs 23:55

If WN3945 is cancelled, these are the other Southwest Airlines nonstop flights from Sacramento to Chicago on the same day, with scheduled departure times in SMF local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How WN3945 actually runs

Pro Flight Search has tracked every published board update for WN3945 across the SMF and MDW boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 13 confirmed landings · 11/13 within 15 min of schedule. Pushes back late but makes up time in the air.

The verdict above is that record speaking, so it reflects how WN3945 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
10-17SMF 23:55 01:17 (+82)MDW 05:50 07:00 (+70)
10-16SMF 23:55 01:17 (+82)MDW 05:50 07:00 (+70)
10-15SMF 23:55 00:11 (+16)MDW 05:50 05:48 (−2)
10-14SMF 23:55 00:26 (+31)MDW 05:50 05:53 (+3)
10-13SMF 23:55 00:09 (+14)MDW 05:50 05:45 (−5)
10-12SMF 23:55 00:06 (+11)MDW 05:50 05:30 (−20)
10-11SMF 23:55 00:36 (+41)MDW 05:50 06:00 (+10)
10-09SMF 23:55 00:04 (+9)MDW 05:50 05:35 (−15)
10-08SMF 23:55 00:07 (+12)MDW 05:50 05:47 (−3)
10-07SMF 23:55 00:09 (+14)MDW 05:50 05:46 (−4)
10-06SMF 23:55 00:09 (+14)MDW 05:50 05:44 (−6)
10-05SMF 23:55 00:16 (+21)MDW 05:50 05:49 (−1)
10-04SMF 23:55 00:15 (+20)MDW 05:50 05:47 (−3)

Aircraft

Recent tails: N8774Q, N8939Q, N9006L, N9030S.

Board clocks recorded as SMF and MDW published them.

Planning around WN3945? 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 — WN3945 Sacramento to Chicago on-time performance, measured from the SMF and MDW airport boards.

Canonical URL
https://proflightsearch.com/flight/WN3945
How we measure this →