How long is the WN3991 flight from Buffalo to Chicago?

The timetable allows 1 h 40 min. Buffalo to Chicago is 752 km (467 mi).

Which terminal does WN3991 use?

It usually leaves from gate 18 at Buffalo Niagara International Airport (BUF). Check the flight card above for today's terminal and gate.

What other flight numbers does WN3991 have?

Also listed as SWA3991 (Southwest Airlines' ICAO code) and WN 3991.

WN3991 Flight Status Southwest Airlines: Buffalo to Chicago (SWA3991)

WN 3991 Buffalo to Chicago Flight Status

Not scheduled today. Latest flight: September 26th, 2026 ; recent history is in the table below.

WN 3991 Flight Status & Schedule Southwest Airlines Buffalo to Chicago

Date	From	To	Departure	Arrival	Status	Details
Sep 26	BUF	MDW	16:39	16:58	Landed	Track >
Sep 19	BUF	MDW	17:08	17:24	Landed	Track >
Sep 12	BUF	MDW	16:55	17:09	Landed	Track >
Sep 05	BUF	MDW	17:06	17:23	Landed	Track >
Aug 29	BUF	MDW	16:50	17:07	Landed	Track >
Aug 22	BUF	MDW	17:03	17:18	Landed	Track >
Aug 15	BUF	MDW	17:02	17:15	Landed	Track >
Aug 08	BUF	MDW	17:02	17:18	Landed	Track >

Southwest Airlines' Buffalo–Chicago flight covers 752 km (467 mi). With 1 h 40 min in the timetable and a usual flight time of about 1 h 15 min, it often makes up time. It is not flying today; the last flight, on 26 September 2026, landed on time.

< All Buffalo BUF Departures All Chicago MDW Arrivals >

About WN 3991

Southwest Airlines Flight WN3991 connects Buffalo, United States to Chicago, United States, taking off from Buffalo Niagara International Airport BUF and landing at Chicago Midway International Airport MDW.

Route: Buffalo Niagara International Airport BUF to Chicago Midway International Airport MDW
Distance: 752 km (467 mi)
Typical flight time: 1 h 15 min
On time: 8 of the last 8
Usually departs from: Gate 18

WN 3991 FAQ

How long is the WN3991 flight from Buffalo to Chicago?: The timetable allows 1 h 40 min. Buffalo to Chicago is 752 km (467 mi).
How often is WN3991 from Buffalo to Chicago late?: None of the last 8 flights arrived 15 or more minutes late.
When was the latest WN3991 flight from Buffalo to Chicago?: The latest WN3991 was the 16:20 (local time) departure from Buffalo on 26 September 2026; it landed 2 minutes early.
Which terminal does WN3991 use?: It usually leaves from gate 18 at Buffalo Niagara International Airport (BUF). Check the flight card above for today's terminal and gate.
What other flight numbers does WN3991 have?: Also listed as SWA3991 (Southwest Airlines' ICAO code) and WN 3991.

WN3991 and Buffalo BUF to Chicago MDW Flights

Other flights departing from Buffalo BUF: OO3870, DL1749, OH5237, UA4403

Other flights arriving at Chicago MDW: WN3480, WN634, WN4581

All flights connecting Buffalo BUF to Chicago MDW.