WN3521 Flight Status Southwest Airlines: Chicago to Boston (SWA3521)
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WN 3521 Chicago to Boston Flight Status
Not scheduled today (November 14th, 2026). Latest flight: August 2nd, 2026 ; recent history is in the table below.
WN 3521 Flight Status & Schedule Southwest Airlines Chicago to Boston
| Date | From | To | Departure | Arrival | Status | Details |
|---|---|---|---|---|---|---|
| Aug 02 | MDW | BOS | 21:42 | 00:35 | Delayed | Track > |
| Jul 26 | MDW | BOS | 19:18 | 22:10 | Landed | Track > |
| Jul 19 | MDW | BOS | 19:16 | 22:04 | Landed | Track > |
| Jul 12 | MDW | BOS | 18:59 | 21:51 | Landed | Track > |
| Jul 05 | MDW | BOS | 19:00 | 21:46 | Landed | Track > |
| Jun 28 | MDW | BOS | 19:37 | 22:25 | Landed Late | Track > |
| Jun 21 | MDW | BOS | 19:14 | 21:57 | Landed | Track > |
| Jun 14 | MDW | BOS | 19:26 | 22:33 | Landed Late | Track > |
| Jun 07 | MDW | BOS | 21:19 | 00:04 | Delayed | Track > |
Southwest Airlines operates WN 3521 from Chicago to Boston, a 1,381 km (858 mi) trip. Its timetable allows 2 h 20 min; in practice it usually takes about 1 h 50 min, so it often makes up time. It is not flying today; the last flight was scheduled on 2 August 2026.
About WN 3521
Southwest Airlines Flight WN3521 connects Chicago, United States to Boston, United States, taking off from Chicago Midway International Airport MDW and landing at Boston Logan International Airport BOS.
- Distance
- 1,381 km (858 mi)
- Typical flight time
- 1 h 50 min
- On time
- 5 of the last 7
- Average delay when late
- 29 min
WN 3521 FAQ
- How long is the WN3521 flight from Chicago to Boston?
- The timetable allows 2 h 20 min. Chicago to Boston is 1,381 km (858 mi).
- How often is WN3521 from Chicago to Boston late?
- 2 of the last 7 flights arrived 15 or more minutes late; when late, by 29 minutes on average.
- When was the latest WN3521 flight from Chicago to Boston?
- The latest WN3521 was the 18:45 (local time) departure from Chicago on 26 July 2026; it landed 5 minutes late.
- Which terminal does WN3521 use?
- It usually arrives at Terminal B at Boston Logan International Airport (BOS). Check the flight card above for today's terminal and gate.
- What other flight numbers does WN3521 have?
- Also listed as SWA3521 (Southwest Airlines' ICAO code) and WN 3521.
WN3521 and Chicago MDW to Boston BOS Flights
Other flights departing from Chicago MDW: WN2756, WN3669, WN4194, WN4263
Other flights arriving at Boston BOS: B68434, UA2798, DL368, DL5619
All flights connecting Chicago MDW to Boston BOS.