WN 4143 Ontario to Phoenix Flight Status

Southwest Airlines Flight WN4143 from Ontario International Airport ONT to Phoenix Sky Harbor International Airport PHX is not scheduled for today June 4th, 2026.
The last time the flight was scheduled was on August 4th, 2025.
Check the table below for WN4143's most recent flight history:

WN 4143 Flight Status & Schedule

Date Departure Arrival Status
Aug 04 13:13 14:08
Landed
Track >
Aug 01 13:18 14:11
Landed
Track >
Jul 31 14:20 15:15
Delayed
Track >
Jul 28 13:05 14:00
Landed
Track >
Jul 25 13:20 14:14
Landed
Track >

Southwest Airlines WN 4143 Ontario to Phoenix Flight Information

Southwest Airlines Flight WN4143 connects Ontario, United States to Phoenix, United States, taking off from Ontario International Airport ONT and landing at Phoenix Sky Harbor International Airport PHX.

How long is the WN4143 flight from Ontario to Phoenix?

The average flight time from Ontario to Phoenix is 55 minutes. The flight distance is 521 km / 324 miles and the average flight speed is 568 km/h / 353 mph.

What is the On-Time Performance (OTP) of Southwest Airlines Flight WN4143 Ontario to Phoenix?

The Airportia On-Time Performance Rating for Southwest Airlines Flight WN4143 is 4.9/5 stars. This metric is calculated using data from the past 10 flights.

Which terminal is the flight WN4143 arriving at?

Flight WN4143 arrives at Phoenix Sky Harbor International Airport (PHX) Terminal 4.

When was the latest WN4143 flight?

The latest flight took off on Monday, August 4th, 2025 with the flight status being Landed on 14:08.

How else can the flight WN4143 be referenced as?

This Southwest Airlines flight can also be referenced as SWA4143, WN 4143, SWA 4143.

How often is flight WN4143 delayed?

On average, 10% of all WN4143 flights are delayed. The average delay is 60 minutes.

Can I get compensation for my delayed or cancelled WN4143 flight or baggage issues?

If your WN4143 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.

See our WN4143 Flight Tracker above for more details.

WN4143 and Ontario ONT to Phoenix PHX Flights

Other flights departing from Ontario ONT: WN1474, AA3203, DL3589, WN2274

Other flights arriving at Phoenix PHX: WN2200, AA848, WN3576, AA3203

All flights connecting Ontario ONT to Phoenix PHX.

WN4143 Southwest Airlines Flight: Ontario to Phoenix Route Map

WN4143 Southwest Airlines Flight Map: Ontario to Phoenix
Flight Delay Compensation up to 600€/$: Claim for delay, cancellation, or baggage issues >
Flight-schedule data supplied by Aviation Edge Real-time Flight Schedules API.