How often is WN1231 on time?

Across 27 flights on COS → PHX from 2026-06-04 to 2026-06-30, WN1231 arrived within 15 minutes of schedule 63% of the time. The median arrival delay was +5 min, and the worst 10% of flights arrived +41 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

• WN1231 on PHX → LAS (4 flights)
• WN1231 on HOU → COS (4 flights)
• WN1231 on PIT → TPA (42 flights)
• WN1231 on SRQ → PIT (15 flights)
• WN1231 on SMF → LAS (1 flights)
• WN1231 on LAS → MKE (33 flights)
• WN1231 on LGA → ATL (58 flights)
• WN1231 on PHX → STL (43 flights)
• WN1231 on SAN → PHX (24 flights)
• WN1231 on MCO → PIT (4 flights)
• WN1231 on DAL → LGB (1 flights)
• WN1231 on SAN → OAK (30 flights)
• WN1231 on MCO → TUL (14 flights)
• WN1231 on TUL → PHX (13 flights)
• WN1231 on PHX → SAN (13 flights)
• WN1231 on SAT → SAN (8 flights)
• WN1231 on FLL → BNA (58 flights)
• WN1231 on LBB → LAS (30 flights)
• WN1231 on LAS → BOI (5 flights)
• WN1231 on HOU → LBB (5 flights)
• WN1231 on LAS → SAN (5 flights)
• WN1231 on SAN → AUS (5 flights)
• WN1231 on DAL → LBB (1 flights)
• WN1231 on SJC → DAL (1 flights)

Related

• All Southwest Airlines flights on COS → PHX
• Compare airlines on COS → PHX
• Southwest Airlines on the return, PHX → COS