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Route · PDX → ORD · 2020–2025 BTS data

Portland to Chicago

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PDX to ORD (Portland to Chicago) ranks #940 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

84.8%
On-time
+5.8 pts
vs US avg
81 min
Delay when late
11,724
Flights
#940 of 4927
Corpus placement

Cancelled

1.1%

Best Month

Mar 2024 93%

Worst Month

Jul 2025 64%

Distance

1,739 mi

Carriers

15

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 164 35 1 1 AS,AA,UA
Nov 2025 174 30 5 0 UA,AA,AS
Oct 2025 264 58 1 0 AA,AS,UA
Sep 2025 255 62 0 2 UA,AA,AS
Aug 2025 294 68 2 6 AA,UA,AS
Jul 2025 297 108 5 3 AA,AS,UA
Jun 2025 289 79 2 1 AA,AS,UA
May 2025 254 57 0 0 AA,AS,UA
Apr 2025 203 36 0 1 UA,AA,AS
Mar 2025 123 15 0 0 AS,UA
Feb 2025 95 13 0 0 AS,UA
Jan 2025 111 16 1 0 AS,UA
Dec 2024 144 15 0 0 AS,UA
Nov 2024 146 16 0 0 UA,AS,AA
Oct 2024 196 17 0 0 UA,AS,AA
Sep 2024 198 27 0 2 NK,UA,AA,AS
Aug 2024 261 41 4 1 AA,AS,NK,UA
Jul 2024 297 80 10 1 AA,AS,NK,UA
Jun 2024 281 53 2 0 AA,AS,NK,UA
May 2024 239 56 2 3 AA,AS,NK,UA
Apr 2024 187 20 1 0 AA,AS,UA
Mar 2024 118 8 0 0 AS,UA
Feb 2024 85 6 0 0 AS,UA
Jan 2024 107 14 18 0 AS,UA

PDX–ORD seasonal on-time pattern

Best: March (91.2%) · weakest: July (77.8%)

75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 86%

Strongest calendar month

March

91.2% on-time · ~120 flights/mo

Busiest calendar month

July

~231 flights/mo avg

Weakest calendar month

July

77.8% on-time · ~231 flights/mo

Cancellation Rate

1.1%

54 of 4,782 flights

Diversion Rate

0.4%

21 of 4,782 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

PDX - Portland

Full on-time, delay-cause, and seasonal performance for Portland, OR.

PDX on-time profile

ORD - Chicago

Full on-time, delay-cause, and seasonal performance for Chicago, IL.

ORD on-time profile

Compare the two airports

See PDX and ORD side by side on delays, cancellations, and reliability.

Compare PDX vs ORD

Origin-hub reliability standing

Mid-pack among PDX departures

From PDX, this corridor sits with 17 other 75–85% on-time routes out of 44 tracked departures, not the hub's reliability leaders (26 at ≥85%) and not the softest ( 1 below 75%). Destination: Chicago · fleet on-time rank #1308 of 4927.

What the Data Says About PDX to ORD

Bureau of Transportation Statistics records show Portland to Chicago (PDX to ORD) running a 84.8% on-time rate over 11,724 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 81.4 minutes. The 1,739-mile corridor is served by 15 carriers, and over the last 24 months 1.1% of 4,782 flights were cancelled, 0.4% diverted.

The monthly split is wide on this route: Mar 2024 posted the strongest performance at 93% on-time, while Jul 2025 came in at just 64% - a 30-point swing worth factoring into travel timing.

On the multi-year calendar, PDX–ORD peaks in March at 91.2% on-time while July carries the heaviest traffic (~231 flights per month) ; the softest month is July at 77.8%, a 13.4-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does PDX to ORD rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, PDX to ORD ranks #940 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from PDX to ORD? ▼
Flights from Portland to Chicago have a 84.8% on-time rate based on 11,724 flights. The average delay is 81.4 minutes. The best recent month was Mar 2024 with 93% on-time.
What is the cancellation rate for PDX to ORD? ▼
Over the last 24 months, 1.1% of flights on this route were cancelled (54 of 4,782 flights) and 0.4% were diverted.
How far is the flight from PDX to ORD? ▼
The flight distance from Portland (PDX) to Chicago (ORD) is approximately 1,739 miles. This route is served by 15 carriers.
When is the best time to fly from PDX to ORD? ▼
The best recent month for on-time performance was Mar 2024 (93% on-time). The worst was Jul 2025 (64% on-time). Consider booking during months with historically better performance.

Airports on this route

PDX Airport

Portland
ORD Airport

Chicago
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 PDX–ORD data

PDX–ORD runs 5.8 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare PDX and ORD airport profiles: delay causes and top routes differ even on the same corridor. PDX airport
  • If your dates flex, March (91.2% on-time) beats July (77.8%) on this corridor. Seasonal chart
  • 4 other routes post a similar 84.8% 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.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

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.