How often is WN399 on time?

Across 8 flights on LAS → SEA from 2026-03-10 to 2026-04-01, WN399 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was -12 min, and the worst 10% of flights arrived +27 min or later. 0% of flights were cancelled.

Delay distribution

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

Performance by month

Performance by day of week

Other routes

• WN399 on AUS → SJC (19 flights)
• WN399 on MCO → AUS (16 flights)
• WN399 on MCO → PIT (4 flights)
• WN399 on LAS → FAT (34 flights)
• WN399 on AUS → MDW (24 flights)
• WN399 on SFO → LAX (15 flights)
• WN399 on OAK → LGB (10 flights)
• WN399 on PDX → OAK (52 flights)
• WN399 on OAK → BUR (14 flights)
• WN399 on OAK → SAN (8 flights)
• WN399 on OAK → LAX (3 flights)
• WN399 on BNA → ABQ (5 flights)
• WN399 on ATL → LGA (60 flights)
• WN399 on TPA → ROC (4 flights)
• WN399 on ONT → PHX (1 flights)
• WN399 on RNO → PHX (30 flights)
• WN399 on MCI → DEN (1 flights)
• WN399 on TPA → CMH (57 flights)
• WN399 on DEN → OMA (1 flights)
• WN399 on OMA → BNA (1 flights)
• WN399 on PHL → DEN (1 flights)
• WN399 on IND → DAL (25 flights)

Related

• All Southwest Airlines flights on LAS → SEA
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• Southwest Airlines on the return, SEA → LAS