Route · PWM → ORD · 2020–2025 BTS data
Portland to Chicago
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PWM to ORD (Portland to Chicago) ranks #2136 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 82.4%
- On-time
- +3.4 pts
- vs US avg
- 87 min
- Delay when late
- 5,860
- Flights
- #2136 of 4927
- Corpus placement
Cancelled
1.6%
Best Month
Apr 2024 92%
Worst Month
Aug 2024 65%
Distance
900 mi
Carriers
35
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 62 | 14 | 1 | 0 | YX,UA,OO |
| Nov 2025 | 91 | 27 | 8 | 0 | OO,UA,YX |
| Oct 2025 | 166 | 48 | 0 | 0 | OO,UA,YX |
| Sep 2025 | 165 | 36 | 2 | 2 | UA,OO,YX |
| Aug 2025 | 177 | 37 | 5 | 1 | OO,YX,UA |
| Jul 2025 | 147 | 45 | 2 | 1 | OO,UA,YX,MQ |
| Jun 2025 | 125 | 32 | 1 | 0 | OO,UA,YX,MQ |
| May 2025 | 114 | 10 | 0 | 0 | OO,UA,MQ |
| Apr 2025 | 80 | 13 | 2 | 0 | OO,UA,YX |
| Mar 2025 | 58 | 9 | 0 | 1 | YX,OO |
| Jan 2025 | 38 | 7 | 0 | 0 | YX,OO |
| Dec 2024 | 61 | 7 | 0 | 0 | OO,UA,YX |
| Nov 2024 | 67 | 9 | 0 | 0 | OO,YX,MQ |
| Oct 2024 | 146 | 24 | 0 | 1 | UA,MQ,OO,YX |
| Sep 2024 | 142 | 22 | 0 | 0 | YX,OO,UA,MQ |
| Aug 2024 | 166 | 58 | 0 | 1 | F9,MQ,YX,UA |
| Jul 2024 | 134 | 25 | 3 | 1 | F9,MQ,UA,YX |
| Jun 2024 | 122 | 25 | 7 | 2 | F9,MQ,UA,YX |
| May 2024 | 69 | 17 | 0 | 0 | F9,YX,OO,UA |
| Apr 2024 | 60 | 5 | 1 | 0 | OO,YX |
| Mar 2024 | 49 | 4 | 3 | 0 | YX,OO |
| Jan 2024 | 31 | 2 | 2 | 0 | YX,OO,UA |
| Dec 2023 | 52 | 8 | 0 | 0 | OO,UA |
| Nov 2023 | 63 | 7 | 0 | 0 | MQ,OO |
PWM–ORD seasonal on-time pattern
Best: April (91.3%) · weakest: February (69.6%)
Strongest calendar month
April
91.3% on-time · ~56 flights/mo
Busiest calendar month
August
~150 flights/mo avg
Weakest calendar month
February
69.6% on-time · ~51 flights/mo
Cancellation Rate
1.6%
37 of 2,385 flights
Diversion Rate
0.4%
10 of 2,385 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
PWM - Portland
Full on-time, delay-cause, and seasonal performance for Portland, ME.
PWM on-time profileORD - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
ORD on-time profileCompare the two airports
See PWM and ORD side by side on delays, cancellations, and reliability.
Compare PWM vs ORDOrigin-hub reliability standing
Mid-pack among PWM departures
From PWM, this corridor sits with 9 other 75–85% on-time routes out of 12 tracked departures, not the hub's reliability leaders (2 at ≥85%) and not the softest ( 1 below 75%). Destination: Chicago · fleet on-time rank #2202 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to PWM–ORD.
Routes with a similar on-time rate
What the Data Says About PWM to ORD
Bureau of Transportation Statistics records show Portland to Chicago (PWM to ORD) running a 82.4% on-time rate over 5,860 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 86.5 minutes. The 900-mile corridor is served by 35 carriers, and over the last 24 months 1.6% of 2,385 flights were cancelled, 0.4% diverted.
The monthly split is wide on this route: Apr 2024 posted the strongest performance at 92% on-time, while Aug 2024 came in at just 65% - a 27-point swing worth factoring into travel timing.
On the multi-year calendar, PWM–ORD peaks in April at 91.3% on-time while August carries the heaviest traffic (~150 flights per month) ; the softest month is February at 69.6%, a 21.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does PWM to ORD rank among US routes by traffic? ▼
How often are flights delayed from PWM to ORD? ▼
What is the cancellation rate for PWM to ORD? ▼
How far is the flight from PWM to ORD? ▼
When is the best time to fly from PWM to ORD? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using PWM–ORD data
PWM–ORD runs 3.4 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare PWM and ORD airport profiles: delay causes and top routes differ even on the same corridor. PWM airport
- If your dates flex, April (91.3% on-time) beats February (69.6%) on this corridor. Seasonal chart
- 4 other routes post a similar 82.4% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.