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Route · ROC → ORD · 2020–2025 BTS data

Rochester to Chicago

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), ROC to ORD (Rochester to Chicago) ranks #1230 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

81.5%
On-time
+2.5 pts
vs US avg
80 min
Delay when late
9,546
Flights
#1230 of 4927
Corpus placement

Cancelled

1.3%

Best Month

Feb 2024 92%

Worst Month

Dec 2025 64%

Distance

528 mi

Carriers

32

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 194 69 6 0 YX,MQ,UA
Nov 2025 225 55 9 0 OO,UA,MQ,YX
Oct 2025 200 54 0 0 OO,UA,YX,MQ
Sep 2025 206 40 1 0 MQ,UA,OO,YX
Aug 2025 191 38 5 0 OO,YX,MQ,UA
Jul 2025 201 61 2 0 UA,YX,MQ
Jun 2025 182 45 2 0 UA,YX,MQ
May 2025 194 33 1 1 OO,UA,YX,MQ
Apr 2025 202 40 5 0 MQ,OO,UA,YX
Mar 2025 178 28 1 0 YX,OO,UA,MQ
Feb 2025 136 43 2 0 UA,YX,MQ
Jan 2025 127 31 0 0 YX,UA,MQ
Dec 2024 151 33 1 1 MQ,UA,YX
Nov 2024 133 26 0 0 UA,MQ,YX
Oct 2024 142 23 0 0 UA,MQ
Sep 2024 149 18 0 0 UA,MQ
Aug 2024 160 50 3 1 MQ,OO,UA
Jul 2024 140 35 1 0 MQ,OO,UA
Jun 2024 96 18 1 1 MQ,UA
May 2024 142 31 1 0 MQ,OO,UA
Apr 2024 139 15 0 0 MQ,OO,UA,YX
Mar 2024 96 9 0 0 MQ,OO,UA,YX
Feb 2024 120 10 0 0 MQ,OO,UA,YX
Jan 2024 126 25 10 0 MQ,YX,OO,UA

ROC–ORD seasonal on-time pattern

Best: March (86.5%) · weakest: December (75.9%)

75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 75.9%

Strongest calendar month

March

86.5% on-time · ~133 flights/mo

Busiest calendar month

September

~157 flights/mo avg

Weakest calendar month

December

75.9% on-time · ~127 flights/mo

Cancellation Rate

1.3%

51 of 3,830 flights

Diversion Rate

0.1%

4 of 3,830 flights

Explore origin & destination

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

ROC - Rochester

Full on-time, delay-cause, and seasonal performance for Rochester, NY.

ROC 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 ROC and ORD side by side on delays, cancellations, and reliability.

Compare ROC vs ORD

Origin-hub reliability standing

Mid-pack among ROC departures

From ROC, this corridor sits with 7 other 75–85% on-time routes out of 12 tracked departures, not the hub's reliability leaders (5 at ≥85%) and not the softest ( 0 below 75%). Destination: Chicago · fleet on-time rank #2555 of 4927.

What the Data Says About ROC to ORD

9,546 tracked flights put the ROC to ORD pairing (Rochester to Chicago) at a 81.5% on-time rate, squarely in line with the wider network. Delays that do occur run 79.8 minutes on average. Across the 528-mile route and its 32 carriers, the trailing 24 months show 1.3% cancelled and 0.1% diverted (3,830 flights sampled).

The monthly split is wide on this route: Feb 2024 posted the strongest performance at 92% on-time, while Dec 2025 came in at just 64% - a 27-point swing worth factoring into travel timing.

On the multi-year calendar, ROC–ORD peaks in March at 86.5% on-time while September carries the heaviest traffic (~157 flights per month) ; the softest month is December at 75.9%, a 10.6-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does ROC to ORD rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, ROC to ORD ranks #1230 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 ROC to ORD? ▼
Flights from Rochester to Chicago have a 81.5% on-time rate based on 9,546 flights. The average delay is 79.8 minutes. The best recent month was Feb 2024 with 92% on-time.
What is the cancellation rate for ROC to ORD? ▼
Over the last 24 months, 1.3% of flights on this route were cancelled (51 of 3,830 flights) and 0.1% were diverted.
How far is the flight from ROC to ORD? ▼
The flight distance from Rochester (ROC) to Chicago (ORD) is approximately 528 miles. This route is served by 32 carriers.
When is the best time to fly from ROC to ORD? ▼
The best recent month for on-time performance was Feb 2024 (92% on-time). The worst was Dec 2025 (64% on-time). Consider booking during months with historically better performance.

Airports on this route

ROC Airport

Rochester
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 ROC–ORD data

ROC–ORD is mid-pack at 81.5% on-time; month and carrier mix move more than the corridor headline.

  • Compare ROC and ORD airport profiles: delay causes and top routes differ even on the same corridor. ROC airport
  • If your dates flex, March (86.5% on-time) beats December (75.9%) on this corridor. Seasonal chart
  • 4 other routes post a similar 81.5% 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.