WN3709 BUF → MDW

Southwest Airlines · Buffalo, NY to Chicago, IL · 28 flights observed, 2026-03-05 to 2026-04-06 · 468 mi

This flight has been on time less than half the time (38%) — expect a real chance of a delay.

WN3709 covers more than one route in the data window — the stats below are for BUF → MDW, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
38%
Median delay
+23 min
90th percentile
+68 min
Cancellation rate
4%

How often is WN3709 on time?

Across 28 flights on BUF → MDW from 2026-03-05 to 2026-04-06, WN3709 arrived within 15 minutes of schedule 38% of the time. The median arrival delay was +23 min, and the worst 10% of flights arrived +68 min or later. 4% of flights were cancelled.

Delay distribution

Arrival delay for completed flights (excludes cancellations and diversions).

ArrivalFlightsShare
Early / on-time1038%
16-30 min415%
31-60 min831%
61-120 min312%
2+ hrs14%

Performance by month

MonthFlightsOn-timeAvg delay
2026-032232%+38 min
2026-04475%+18 min

Performance by day of week

DayFlightsOn-time
Mon520%
Tue367%
Wed475%
Thu425%
Fri520%
Sat540%
SunNo data—

Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…