How often is WN4020 on time?

Across 33 flights on LAS → DEN from 2026-04-07 to 2026-06-03, WN4020 arrived within 15 minutes of schedule 91% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +12 min or later. 3% 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

• WN4020 on TPA → DEN (20 flights)
• WN4020 on RNO → LAS (43 flights)
• WN4020 on BUF → MDW (24 flights)
• WN4020 on LAS → BUF (24 flights)
• WN4020 on DEN → PNS (7 flights)
• WN4020 on LGB → LAS (7 flights)
• WN4020 on PNS → BNA (7 flights)
• WN4020 on SJC → LGB (8 flights)
• WN4020 on MHT → MCO (33 flights)
• WN4020 on SFO → PHX (11 flights)
• WN4020 on LAS → HOU (2 flights)
• WN4020 on HOU → BWI (1 flights)
• WN4020 on BWI → MCO (1 flights)
• WN4020 on DEN → BUR (5 flights)
• WN4020 on RSW → BWI (1 flights)
• WN4020 on OAK → SAN (17 flights)
• WN4020 on SAN → PHX (4 flights)
• WN4020 on DEN → RIC (35 flights)

Related

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