Route
MDW → BUF
Chicago Midway International Airport Buffalo Niagara International Airport
How punctual is this route?
- On-time arrivals
- 74.4%
- Less than 15 minutes late
- Cancelled
- 1.4%
- Of scheduled flights
- Average delay when late
- 60 min
- Flights arriving 15+ minutes late
- Flights tracked
- 829
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 48%
- Airline (crew, maintenance, cleaning) 39%
- Air traffic control & airport 11%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 79.3% | 82 |
| October 2025 | 74.6% | 59 |
| November 2025 | 76.4% | 57 |
| December 2025 | 71.2% | 60 |
| January 2026 | 79.3% | 30 |
| February 2026 | 65.5% | 30 |
| March 2026 | 67.6% | 77 |
| April 2026 | 86.6% | 82 |
| May 2026 | 81.7% | 82 |
| June 2026 | 62.1% | 89 |
| July 2026 | 66.7% | 92 |
| August 2026 | 79.5% | 89 |
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
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 829 | 74.4% | 1.4% | 60 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN2240
36% late · 62 flights
-
WN4498
16% late · 58 flights
-
WN758
7% late · 55 flights
-
WN2164
24% late · 49 flights
-
WN694
17% late · 42 flights
-
WN1655
40% late · 36 flights
-
WN4110
73% late · 36 flights
-
WN2834
38% late · 33 flights
-
WN1093
6% late · 31 flights
-
WN3583
32% late · 31 flights
-
WN3638
32% late · 31 flights
-
WN3490
11% late · 28 flights
-
WN719
21% late · 28 flights
-
WN1156
15% late · 27 flights
-
WN3195
19% late · 27 flights
-
WN3226
20% late · 25 flights
-
WN3537
9% late · 23 flights
-
WN2436
26% late · 20 flights
-
WN4217
11% late · 20 flights
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