Flight WN4975
Southwest Airlines flight WN4975
Looking for WN4975 in the air…
Chicago (MDW) to Boston (BOS)
Historically, this flight arrives 15+ minutes late 68% of the time, and when it is late the delay averages 75 minutes. It was cancelled 1.6% of the time.
- On-time arrivals
- 32.2%
- Less than 15 minutes late
- Cancelled
- 1.6%
- Of scheduled flights
- Average delay when late
- 75 min
- Flights arriving 15+ minutes late
- Flights tracked
- 61
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 35%
- Airline (crew, maintenance, cleaning) 31%
- Late-arriving aircraft 31%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Baltimore (BWI) to Raleigh/Durham (RDU)
Historically, this flight arrives 15+ minutes late 5% of the time, and when it is late the delay averages 73 minutes. It was cancelled 6.7% of the time.
- On-time arrivals
- 95.2%
- Less than 15 minutes late
- Cancelled
- 6.7%
- Of scheduled flights
- Average delay when late
- 73 min
- Flights arriving 15+ minutes late
- Flights tracked
- 45
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 89%
- Air traffic control & airport 11%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (MDW) to Memphis (MEM)
Historically, this flight arrives 15+ minutes late 38% of the time, and when it is late the delay averages 127 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 62.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 127 min
- Flights arriving 15+ minutes late
- Flights tracked
- 24
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 67%
- Airline (crew, maintenance, cleaning) 31%
- Air traffic control & airport 2%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Jacksonville (JAX) to St Louis (STL)
Only 4 flights on record, which is too few for reliable odds.
- On-time arrivals
- 100.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- —
- Flights arriving 15+ minutes late
- Flights tracked
- 4
- Scheduled flights in the period
Chicago (MDW) to Baltimore (BWI)
Only 3 flights on record, which is too few for reliable odds.
- On-time arrivals
- 100.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- —
- Flights arriving 15+ minutes late
- Flights tracked
- 3
- Scheduled flights in the period
Las Vegas (LAS) to Spokane (GEG)
Only 1 flight on record, which is too few for reliable odds.
- On-time arrivals
- 100.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- —
- Flights arriving 15+ minutes late
- Flights tracked
- 1
- Scheduled flights in the period
Show as table
| Month | On time | Flights |
|---|---|---|
| November 2025 | 100.0% | 1 |
| January 2026 | 95.2% | 22 |
| February 2026 | 95.2% | 23 |
| March 2026 | 100.0% | 3 |
| June 2026 | 40.7% | 27 |
| July 2026 | 27.6% | 31 |
| August 2026 | 61.3% | 31 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data