Carrier performance at one airport
YX→ORD
Republic Airways at Chicago O'Hare International
- Departures
- 33,415
- Period
- September 2025 to August 2026
- Routes
- 25
- Rank here
- #2 of 12
Republic Airways at Chicago carries a cancellation problem, not just a delay problem: 3.8% of scheduled flights never operate, against 1.9% nationally. Of the ones that do fly, close to three flights in four arrive on time, worth a B− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 33,415 flights, of which Envoy Air flew 57,966 at 76.1% on time.
Measured against the airport rather than the country, Republic Airways runs 5 points ahead of the 70.7% weighted average across all carriers at ORD. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.
Key figures
On time
76.1%
32,073 completed departures
Avg delay
74 min
Across delayed flights only
Cancelled
3.81%
At ORD, this carrier only
Rank here
#2
Of 12 carriers clearing the floor at ORD
These figures cover 33,000 flights between September 2025 and August 2026. Beyond the headline rate, 9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Against the competition
Every carrier at ORD, ranked
The choice of carrier is not cosmetic here. Envoy Air arrives on time 76.1% of the time; PSA Airlines manages 60.2%. Sample sizes sit next to every figure, because a two-point gap across 2,832 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Air | 57,966 | 76.1% | 65 min | 2.93% | B |
| Republic Airways (this page) | 33,415 | 76.1% | 74 min | 3.81% | B− |
| JetBlue Airways | 1,293 | 73.1% | 99 min | 6.34% | C− |
| United Airlines | 102,132 | 73.0% | 73 min | 1.30% | C |
| Delta Air Lines | 10,687 | 72.0% | 91 min | 3.13% | C− |
| Southwest Airlines | 3,139 | 71.3% | 70 min | 1.40% | C |
| Frontier Airlines | 4,179 | 67.7% | 109 min | 3.76% | C− |
| Alaska Airlines | 3,346 | 67.4% | 70 min | 1.82% | C |
| American Airlines | 61,506 | 66.4% | 82 min | 2.56% | C |
| SkyWest Airlines | 78,955 | 65.8% | 88 min | 4.06% | C− |
| Spirit Airlines | 3,558 | 63.4% | 83 min | 5.99% | D− |
| PSA Airlines | 2,832 | 60.2% | 127 min | 7.06% | D− |
PSA Airlines cancels 7.1% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Route by route
Where Republic Airways flies from ORD
Republic Airways operates 25 routes out of ORD with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| ORD to IND · Indianapolis | 2,781 | 76.5% | 83 min | 3.74% | B− |
| ORD to SDF · Louisville | 1,850 | 75.8% | 77 min | 4.11% | B− |
| ORD to PIT · Pittsburgh | 1,722 | 80.3% | 85 min | 2.56% | B |
| ORD to CMH · Columbus | 1,617 | 75.6% | 81 min | 3.40% | B− |
| ORD to LGA · New York | 1,284 | 71.5% | 69 min | 8.64% | C− |
| ORD to CVG · Cincinnati | 1,267 | 78.3% | 68 min | 3.71% | B− |
| ORD to RDU · Raleigh | 1,153 | 75.0% | 72 min | 3.21% | B− |
| ORD to DCA · Washington | 1,150 | 69.8% | 73 min | 4.43% | C− |
| ORD to RIC · Richmond | 937 | 76.8% | 70 min | 2.45% | B |
| ORD to BOS · Boston | 932 | 69.7% | 79 min | 5.90% | C− |
| ORD to JFK · New York | 830 | 77.5% | 75 min | 3.73% | B− |
| ORD to SYR · Syracuse | 726 | 78.8% | 79 min | 3.17% | B− |
| ORD to BDL · Hartford | 669 | 79.7% | 78 min | 3.29% | B− |
| ORD to GRR · Grand Rapids | 665 | 71.7% | 70 min | 3.46% | C− |
| ORD to ROC · Rochester | 660 | 79.9% | 68 min | 1.97% | B |
| ORD to DSM · Des Moines | 612 | 76.4% | 74 min | 4.25% | B− |
| ORD to PWM · Portland | 609 | 75.6% | 71 min | 3.12% | B− |
| ORD to ALB · Albany | 596 | 73.4% | 74 min | 4.19% | C− |
| ORD to CLE · Cleveland | 583 | 76.2% | 69 min | 5.32% | B− |
| ORD to MSN · Madison | 567 | 76.1% | 77 min | 3.17% | B− |
| ORD to MCI · Kansas City | 561 | 78.9% | 63 min | 1.78% | B |
| ORD to BNA · Nashville | 550 | 76.4% | 58 min | 2.18% | B |
| ORD to TVC · Traverse City | 533 | 70.9% | 78 min | 5.44% | C− |
| ORD to MSP · Minneapolis | 526 | 73.6% | 73 min | 7.22% | C− |
| ORD to MEM · Memphis | 522 | 70.4% | 84 min | 5.56% | C− |
Flight by flight
Republic Airways flight numbers from ORD
8 Republic Airways flight numbers leaving ORD flew their main route often enough to have a record of their own. Grouped by destination.
Departure window
Best time of day for this operation
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 16 points, against 16 points between the best and worst carrier.
- 5am–8am2,889 flights85.5%
- 8am–11am7,695 flights80.7%
- 11am–2pm4,949 flights78.4%
- 2pm–5pm6,147 flights75.2%
- 5pm–8pm5,317 flights70.5%
- 8pm–5am6,418 flights69.3%
Scale runs 60% to 90%.
Book the early departure. Flights leaving between 5am–8am arrive on time 85.5% of the time, against 69.3% for the overnight window. That is 16 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 7,695 flights scheduled in it.
Across the year
Seasonal pattern
December is the weak month at 62.8% on time, against 87.1% in September. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. December was the busiest month here, with 3,612 flights.
Delay causes
What holds this operation up
- 46%Late-arriving aircraft
- 23%National Airspace System
- 20%Carrier
- 11%Extreme weather
- 0%Security
Extreme weather accounts for 11% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 1.8 times the usual weather exposure. The split is drawn from 569,019 reported delay minutes.
Cancellations run at 3.81%, against 1.89% nationally. That is about one flight in 25 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
33,415 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.
Put together: the delay figures matter less here than the 3.81% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 32,073 completed flights over 12 months sit behind that.
Common questions
Republic Airways at ORD
How often is Republic Airways at ORD delayed?
About one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 23.9% of the 33,415 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on Republic Airways at ORD?
Envoy Air leads at 76.1% on time across 57,966 flights. PSA Airlines is at the other end on 60.2%, a gap of 16 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on Republic Airways at ORD?
The 5am–8am departure window is the strongest at 85.5% on time. The 8pm–5am window is the weakest at 69.3%, 16 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are December delays on Republic Airways at ORD?
December is the weakest month at 62.8% on time, compared with 87.1% in September. Across the year that is 24 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.