WN355Southwest Airlines · BOS → STL
live · 43m ago
Route confirmed Southwest Airlines

WN355 BostonBOS St LouisSTL

WN355 by Southwest Airlines flies from Boston (BOS) to St Louis (STL).

Right nowNext departure today Operates daily
10:45

scheduled from BOS

The route today

live boards
BOSBostonOn-time likelyBOS delay board →
STLSt LouisOn-time likelySTL delay board →
BOS→STLevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
40%Chance of 15+ min delay
1.9%Chance of cancellation
+7 minTypical airport delay in this weather

Conditions at BOS and STL are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records 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 at Boston

Forecast

Wed 11 Nov, local date

High14°Clikely 13°C to 17°C
Low7°Clikely 5°C to 10°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at St Louis

Forecast

Wed 11 Nov, local date

High20°Clikely 17°C to 22°C
Low9°Clikely 7°C to 11°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · 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 Boston to St Louis flights today

same route · Southwest Airlines
WN819departs 05:10
WN2620departs 05:15
WN3606departs 05:15
WN958departs 12:55
WN4929departs 18:35

If WN355 is cancelled, these are the other Southwest Airlines nonstop flights from Boston to St Louis on the same day, with scheduled departure times in BOS local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How WN355 actually runs

Pro Flight Search has tracked every published board update for WN355 across the BOS and STL boards: schedule changes, gate pushes and actual clocks. Combined risk score: 3.7/100. Based on airport operations, weather, and cached board history at BOS and STL.

The verdict above is that record speaking, so it reflects how WN355 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around WN355? 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: WN355 Boston to St Louis on-time performance, measured from the BOS and STL airport boards.

Canonical URL
https://proflightsearch.com/flight/WN355
How we measure this →