Route
PDX → MDW
Portland International Airport Chicago Midway International Airport
How punctual is this route?
- On-time arrivals
- 89.2%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 53 min
- Flights arriving 15+ minutes late
- Flights tracked
- 675
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 40%
- Airline (crew, maintenance, cleaning) 32%
- Air traffic control & airport 24%
- Extreme weather 2%
- Security 1%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 91.5% | 82 |
| October 2025 | 83.3% | 54 |
| November 2025 | 96.7% | 31 |
| December 2025 | 83.9% | 31 |
| January 2026 | 90.3% | 31 |
| February 2026 | 96.4% | 28 |
| March 2026 | 92.7% | 58 |
| April 2026 | 96.6% | 60 |
| May 2026 | 95.0% | 61 |
| June 2026 | 82.1% | 79 |
| July 2026 | 83.3% | 85 |
| August 2026 | 88.0% | 75 |
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 | 675 | 89.2% | 0.7% | 53 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN3203
10% late · 61 flights
-
WN4016
8% late · 59 flights
-
WN3708
5% late · 58 flights
-
WN1162
4% late · 57 flights
-
WN2884
9% late · 47 flights
-
WN3202
40% late · 43 flights
-
WN280
6% late · 33 flights
-
WN4161
7% late · 32 flights
-
WN2678
3% late · 31 flights
-
WN3131
11% late · 28 flights
-
WN1148
15% late · 27 flights
-
WN3617
0% late · 26 flights
-
WN3130
25% late · 20 flights
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