WN138 BWI → SFO

Southwest Airlines · Baltimore, MD to San Francisco, CA · 58 flights observed, 2026-01-06 to 2026-03-04 · 2,457 mi

This flight has been getting less reliable recently — 2026-02's on-time rate (62%) is well below the 100% average from earlier months.

WN138 covers more than one route in the data window — the stats below are for BWI → SFO, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
80%
Median delay
-4 min
90th percentile
+38 min
Cancellation rate
2%

How often is WN138 on time?

Across 58 flights on BWI → SFO from 2026-01-06 to 2026-03-04, WN138 arrived within 15 minutes of schedule 80% of the time. The median arrival delay was -4 min, and the worst 10% of flights arrived +38 min or later. 2% of flights were cancelled.

Delay distribution

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

ArrivalFlightsShare
Early / on-time4480%
16-30 min47%
31-60 min59%
61-120 min12%
2+ hrs12%

Performance by month

MonthFlightsOn-timeAvg delay
2026-0125100%-13 min
2026-022662%+10 min
2026-03475%+13 min

Performance by day of week

DayFlightsOn-time
Mon875%
Tue978%
Wed875%
Thu875%
Fri888%
Sat888%
Sun683%

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