Carrier route record
YXLGA→ORD
Republic Airways · New York to Chicago
- Flights
- 1,285
- Period
- September 2025 to August 2026
- Share of route
- 11%
- Carriers
- 6
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Republic Airways.
Republic on LGA to ORD carries a cancellation problem, not just a delay problem: 9.4% of scheduled flights never operate, against 1.9% nationally. Of the ones that do fly, about seven flights in ten arrive on time, worth a C− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 1,285 flights. The strongest carrier on the route with a full sample, American Airlines, flew 2,989 at 69.2% on time.
American Airlines is the most reliable of the three carriers covered here at 69.2% on time across 2,989 flights.
Key figures
On time
68.3%
Arrivals under 15 minutes late, of 1,159 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
9.42%
National rate is 1.89%
Whole route
66.7%
Every carrier on LGA to ORD, 11,630 flights
These figures cover 1,285 flights between September 2025 and August 2026. Beyond the headline rate, 10.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Republic against every carrier on LGA to ORD
Republic flew 1,285 of the 11,630 flights on LGA to ORD, about 11% of it. Its 68.3% on time is 2 points better than the route as a whole, which runs 66.7%. Ranked by on-time rate it is number two of six carriers on the route, where the range runs from American at 69.2% to SkyWest at 61.8%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The three carriers here are closely matched: 4 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| American Airlines | 2,989 | 69.2% | 89 min | 4.78% | C− |
| Republic Airways (this page) | 1,285 | 68.3% | 62 min | 9.42% | C− |
| Delta Air Lines | 2,309 | 65.8% | 97 min | 5.89% | C− |
| United Airlines | 4,671 | 65.4% | 90 min | 4.24% | C− |
| Spirit Airlinesthin sample | 284 | 64.0% | 88 min | 7.04% | D− |
| SkyWest Airlinesthin sample | 92 | 61.8% | 90 min | 17.39% | D− |
Delta Air Lines cancels 5.9% 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.
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Departure window
When Republic runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 11 points, against 4 points between the best and worst carrier.
- 5am–8am90 flights73.8%
- 8am–11am281 flights71.8%
- 11am–2pm182 flights71.9%
- 2pm–5pm261 flights69.6%
- 5pm–8pm328 flights62.6%
- 8pm–5am143 flights63.8%
Scale runs 55% to 80%.
The 5pm–8pm window is where this operation falls apart: 62.6% on time, against 73.8% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5pm–8pm window is the busiest, with 328 flights scheduled in it.
Across the year
Republic on LGA to ORD through the year
- Jul–Sep 20258 flights—
- Oct–Dec 2025197 flights55.7%
- Jan–Mar 2026976 flights71.1%
- Apr–Jun 202692 flights64.7%
- Jul–Sep 202612 flights—
Scale runs 45% to 75%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 68.3% on time across 1,285 flights.
Republic on LGA to ORD did not run the same all year. Its best quarter was Jan–Mar 2026 at 71.1% on time and its weakest Oct–Dec 2025 at 55.7%, a swing of 15 points on roughly 428 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
Across the week, Saturday is the strongest day at 73.1% on time and Sunday the weakest at 60.0%, a spread of 13 points.
Arrival by arrival
How late Republic on LGA to ORD runs when it is late
Republic on LGA to ORD often beats the schedule: 329 of 1,159 completed flights, 28%, arrived 15 minutes or more early. The 367 late arrivals split 133 under half an hour, 111 between 30 and 60 minutes, and 123 an hour or more.
- 15+ min early329 flights28.4%
- Within 15 min463 flights39.9%
- 15–29 min late133 flights11.5%
- 30–59 min late111 flights9.6%
- 1–2 hours late76 flights6.6%
- 2+ hours late47 flights4.1%
Scale runs 0% to 100%.
Share of 1,159 completed flights by arrival against schedule.
37 of 269 late departures made up the time and arrived on time, 14% of them. In the other direction, 135 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ORD.
The worst days
Worst days for Republic on LGA to ORD
The latest arrival of the period was on 5 April 2026, 7 hours 22 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 5 April 2026 | 7 hours 22 minutes | Late-arriving aircraft |
| 23 March 2026 | 6 hours 48 minutes | Carrier |
| 6 March 2026 | 5 hours 27 minutes | National Airspace System |
| 15 February 2026 | 5 hours 20 minutes | Late-arriving aircraft |
| 25 February 2026 | 4 hours 55 minutes | Late-arriving aircraft |
Delay causes
Why Republic runs late on this route
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 23,000 reported delay minutes.
- 38%National Airspace System
- 38%Late-arriving aircraft
- 21%Carrier
- 2%Extreme weather
- 0%Security
38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 23,000 reported delay minutes here, that single category outweighs weather by 15 to one. The split is drawn from 22,593 reported delay minutes.
38% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 8,669 minutes out of 23,000, against a national NAS share of 21%.
Cancellations run at 9.42%, against 1.89% nationally. That is about one flight in ten 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.
Connections and stage length
What a delay here costs
10.6% 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.
The 733 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg is a different operation and performs like one: it runs 71.5% on time across 1,284 flights, 3 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 3 points of difference.
The sample behind these figures is 1,285 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking Republic on LGA to ORD
Put together: the delay figures matter less here than the 9.42% cancellation rate. A late arrival costs you about 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. 1,159 completed flights over 12 months sit behind that.
Related
Where to go next
- LGA to ORD, every carrier
- Republic on ORD to LGA, the return leg
- American Airlines on LGA to ORD69.2%
- Delta Air Lines on LGA to ORD65.8%
- United Airlines on LGA to ORD65.4%
- Spirit Airlines on LGA to ORD64.0%
- Republic Airways network-wide record
- LaGuardia (LGA) delay statistics
- Chicago O'Hare International (ORD) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
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.