How often is WN3877 on time?

Across 24 flights on SFO → PHX from 2026-04-09 to 2026-06-01, WN3877 arrived within 15 minutes of schedule 4% of the time. The median arrival delay was +37 min, and the worst 10% of flights arrived +150 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

• WN3877 on MDW → IND (23 flights)
• WN3877 on BWI → SRQ (7 flights)
• WN3877 on IND → BWI (7 flights)
• WN3877 on PHX → SAT (58 flights)
• WN3877 on MCO → MKE (1 flights)
• WN3877 on TPA → DAL (9 flights)
• WN3877 on DAL → DEN (2 flights)
• WN3877 on DAL → TUS (5 flights)
• WN3877 on PVD → TPA (1 flights)
• WN3877 on PIT → RSW (27 flights)
• WN3877 on STL → PIT (1 flights)
• WN3877 on DEN → MKE (4 flights)
• WN3877 on PHX → DEN (42 flights)
• WN3877 on SAN → PHX (24 flights)
• WN3877 on OAK → SAN (32 flights)
• WN3877 on MDW → PHL (34 flights)
• WN3877 on PHL → MCO (10 flights)

Related

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