Route
BOS → MDW
Boston Logan International Airport Chicago Midway International Airport
How punctual is this route?
- On-time arrivals
- 69.6%
- Less than 15 minutes late
- Cancelled
- 2.0%
- Of scheduled flights
- Average delay when late
- 67 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,368
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 58%
- Airline (crew, maintenance, cleaning) 21%
- Air traffic control & airport 18%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 57.1% | 128 |
| October 2025 | 71.0% | 139 |
| November 2025 | 81.9% | 88 |
| December 2025 | 71.1% | 90 |
| January 2026 | 84.8% | 69 |
| February 2026 | 79.3% | 63 |
| March 2026 | 67.9% | 113 |
| April 2026 | 79.7% | 119 |
| May 2026 | 73.8% | 123 |
| June 2026 | 70.3% | 143 |
| July 2026 | 63.3% | 151 |
| August 2026 | 54.4% | 142 |
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 | 1,368 | 69.6% | 2.0% | 67 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN746
48% late · 64 flights
-
WN745
14% late · 60 flights
-
WN1432
14% late · 59 flights
-
WN3665
40% late · 58 flights
-
WN699
11% late · 58 flights
-
WN701
33% late · 58 flights
-
WN3911
60% late · 52 flights
-
WN898
36% late · 50 flights
-
WN961
6% late · 50 flights
-
WN776
2% late · 49 flights
-
WN2012
22% late · 46 flights
-
WN4106
50% late · 43 flights
-
WN3239
9% late · 35 flights
-
WN1266
50% late · 33 flights
-
WN527
15% late · 33 flights
-
WN833
9% late · 33 flights
-
WN1477
3% late · 31 flights
-
WN1482
6% late · 31 flights
-
WN2650
16% late · 31 flights
-
WN1779
53% late · 30 flights
-
WN3514
39% late · 28 flights
-
WN744
7% late · 28 flights
-
WN1030
41% late · 22 flights
-
WN1435
29% late · 21 flights
Reviews
No reviews yet. Be the first to review this route.