| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jun 01 | BUF | MDW | 20:20 | 20:39 |
Landed
|
Track > |
| May 29 | BUF | MDW | 20:22 | 20:35 |
Landed
|
Track > |
| May 28 | BUF | MDW | 20:28 | 20:43 |
Landed
|
Track > |
| May 25 | BUF | MDW | 20:30 | 20:45 |
Landed
|
Track > |
| May 22 | BUF | MDW | 20:36 | 20:52 |
Landed
|
Track > |
| May 21 | BUF | MDW | 20:32 | 20:56 |
Landed Late
|
Track > |
| May 18 | BUF | MDW | 22:44 | 20:40 |
Unknown
|
Track > |
| May 15 | BUF | MDW | 20:18 | 20:30 |
Landed
|
Track > |
| May 14 | BUF | MDW | 20:46 | 21:00 |
Landed Late
|
Track > |
| May 11 | BUF | MDW | 20:14 | 20:36 |
Landed
|
Track > |
Southwest Airlines Flight WN4020 connects Buffalo, United States to Chicago, United States, taking off from Buffalo Niagara International Airport BUF and landing at Chicago Midway International Airport MDW.
How long is the WN4020 flight from Buffalo to Chicago?
The average flight time from Buffalo to Chicago is 1 hour and 16 minutes. The flight distance is 752 km / 467 miles and the average flight speed is 576 km/h / 358 mph.
What is the On-Time Performance (OTP) of Southwest Airlines Flight WN4020 Buffalo to Chicago?
The Airportia On-Time Performance Rating for Southwest Airlines Flight WN4020 is 4.9/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest WN4020 flight?
The latest flight took off on Tuesday, June 2nd, 2026 with the flight status being Landed on 20:39.
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 11 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 Buffalo BUF: DL3969, DL2050, C27326, DL5842
Other flights arriving at Chicago MDW: WN1250, WN3418, WN2094, G41480
All flights connecting Buffalo BUF to Chicago MDW.