| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jun 01 | LAS | BUF | 12:34 | 19:18 |
Landed
|
Track > |
| May 29 | LAS | BUF | 12:30 | 19:23 |
Landed
|
Track > |
| May 28 | LAS | BUF | 12:25 | 19:15 |
Landed
|
Track > |
| May 25 | LAS | BUF | 12:27 | 19:17 |
Landed
|
Track > |
| May 22 | LAS | BUF | 12:46 | 19:34 |
Landed
|
Track > |
| May 21 | LAS | BUF | 12:43 | 19:25 |
Landed
|
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| May 18 | LAS | BUF | 14:32 | 21:36 |
Delayed
|
Track > |
| May 15 | LAS | BUF | 12:10 | 19:05 |
Landed
|
Track > |
| May 14 | LAS | BUF | 12:37 | 19:41 |
Landed Late
|
Track > |
| May 11 | LAS | BUF | 12:12 | 19:09 |
Landed
|
Track > |
Southwest Airlines Flight WN4020 connects Las Vegas, United States to Buffalo, United States, taking off from Las Vegas McCarran International Airport LAS and landing at Buffalo Niagara International Airport BUF.
How long is the WN4020 flight from Las Vegas to Buffalo?
The average flight time from Las Vegas to Buffalo is 3 hours and 52 minutes. The flight distance is 3189 km / 1982 miles and the average flight speed is 823 km/h / 511 mph.
What is the On-Time Performance (OTP) of Southwest Airlines Flight WN4020 Las Vegas to Buffalo?
The Airportia On-Time Performance Rating for Southwest Airlines Flight WN4020 is 4.7/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest WN4020 flight?
The latest flight took off on Monday, June 1st, 2026 with the flight status being Landed on 19:18.
How else can the flight WN4020 be referenced as?
This Southwest Airlines flight can also be referenced as SWA4020, WN 4020, SWA 4020.
How often is flight WN4020 delayed?
On average, 50% of all WN4020 flights are delayed. The average delay is 35 minutes.
Can I get compensation for my delayed or cancelled WN4020 flight or baggage issues?
If your WN4020 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 WN4020 Flight Tracker above for more details.
Other flights departing from Las Vegas LAS: AN8007, DL945, WN2544, WN1101
Other flights arriving at Buffalo BUF: F91692, WN2737, OO3969, WN2164
All flights connecting Las Vegas LAS to Buffalo BUF.