How often is WN1666 on time?

Across 58 flights on ONT → DEN from 2026-04-07 to 2026-06-03, WN1666 arrived within 15 minutes of schedule 91% of the time. The median arrival delay was -3 min, and the worst 10% of flights arrived +13 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

• WN1666 on DEN → SJC (7 flights)
• WN1666 on BWI → AUS (8 flights)
• WN1666 on PHX → ONT (18 flights)
• WN1666 on JAX → BWI (32 flights)
• WN1666 on DEN → TUL (50 flights)
• WN1666 on BWI → DEN (18 flights)
• WN1666 on DEN → SAT (45 flights)
• WN1666 on HOU → DCA (1 flights)
• WN1666 on BUR → PHX (31 flights)
• WN1666 on ELP → SAT (1 flights)
• WN1666 on PHX → ELP (1 flights)
• WN1666 on SEA → MDW (57 flights)
• WN1666 on TPA → PIT (20 flights)
• WN1666 on LAX → DAL (1 flights)

Related

• All Southwest Airlines flights on ONT → DEN
• Compare airlines on ONT → DEN
• Southwest Airlines on the return, DEN → ONT