Route
PDX → ORD
Portland International Airport Chicago O'Hare International Airport
How punctual is this route?
- On-time arrivals
- 79.2%
- Less than 15 minutes late
- Cancelled
- 1.0%
- Of scheduled flights
- Average delay when late
- 81 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,814
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 38%
- Airline (crew, maintenance, cleaning) 34%
- Late-arriving aircraft 27%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 75.5% | 255 |
| October 2025 | 77.9% | 264 |
| November 2025 | 82.2% | 174 |
| December 2025 | 78.4% | 164 |
| January 2026 | 84.7% | 140 |
| February 2026 | 89.8% | 148 |
| March 2026 | 84.7% | 181 |
| April 2026 | 73.6% | 242 |
| May 2026 | 84.2% | 285 |
| June 2026 | 74.2% | 322 |
| July 2026 | 77.0% | 339 |
| August 2026 | 78.4% | 300 |
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 |
|---|---|---|---|---|
| United Airlines | 1,413 | 81.4% | 0.7% | 71 min |
| American Airlines | 901 | 75.8% | 1.2% | 107 min |
| Alaska Airlines | 500 | 78.9% | 1.4% | 52 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
AS324
26% late · 354 flights
-
UA1490
13% late · 265 flights
-
UA2306
11% late · 182 flights
-
AS376
10% late · 140 flights
-
UA1641
24% late · 103 flights
-
UA2094
9% late · 103 flights
-
UA534
18% late · 103 flights
-
UA2336
34% late · 102 flights
-
AA2515
25% late · 85 flights
-
AA820
22% late · 83 flights
-
AA3303
45% late · 78 flights
-
AA2284
32% late · 76 flights
-
AA2933
16% late · 76 flights
-
AA2977
36% late · 76 flights
-
UA2635
8% late · 72 flights
-
AA563
26% late · 62 flights
-
AA1508
6% late · 54 flights
-
UA1850
31% late · 52 flights
-
UA1369
7% late · 45 flights
-
AA2197
0% late · 44 flights
-
AA2511
48% late · 44 flights
-
AA3099
23% late · 44 flights
-
UA2321
30% late · 37 flights
-
UA2265
23% late · 35 flights
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