Carrier route record

YXORD→LGA

Republic Airways · Chicago to New York

Flights: 1,297
Period: July 2025 to June 2026
Share of route: 11%
Carriers: 6

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Republic Airways.

Republic on ORD to LGA carries a cancellation problem, not just a delay problem: 8.6% of scheduled flights never operate, against 1.8% 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 1,297 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 2,296 at 70.3% on time.

The national on-time rate over the same period is 77.6%, so Republic on ORD to LGA runs 7 points behind the country as a whole. Across a thousand flights that is about 66 extra late arrivals.

On time

71.0%

Arrivals under 15 minutes late, of 1,180 completed flights

Avg delay

69 min

Across delayed arrivals only, not all flights

Cancelled

8.64%

National rate is 1.81%

Whole route

67.3%

Every carrier on ORD to LGA, 11,625 flights

These figures cover 1,297 flights between July 2025 and June 2026. Beyond the headline rate, 10.8% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Carrier by carrier

Republic against every carrier on ORD to LGA

Republic flew 1,297 of the 11,625 flights on ORD to LGA, about 11% of it. Its 71.0% on time is 4 points better than the route as a whole, which runs 67.3%. Ranked by on-time rate it is first of six carriers on the route, where the range runs from Republic at 71.0% to Spirit at 55.3%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The three carriers here are closely matched: 6 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.

On-time performance by carrier on ORD to LGA
Airline	Flights	On time	Avg delay	Cancelled	Grade
Republic Airways (this page)	1,297	71.0%	69 min	8.64%	C−
Delta Air Lines	2,296	70.3%	98 min	4.79%	C−
United Airlines	4,662	67.4%	81 min	3.41%	C−
American Airlines	2,948	64.7%	80 min	4.31%	D−
SkyWest Airlinesthin sample	92	61.0%	69 min	16.30%	D−
Spirit Airlinesthin sample	330	55.3%	99 min	8.48%	D−

Delta Air Lines cancels 4.8% 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.

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 16 points, against 6 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am280 flights80.1%
8am–11am291 flights70.6%
11am–2pm208 flights66.8%
2pm–5pm264 flights66.8%
5pm–8pm200 flights70.5%
8pm–5am54 flights63.6%

Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.

The 8pm–5am window is where this operation falls apart: 63.6% on time, against 80.1% 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 8am–11am window is the busiest, with 291 flights scheduled in it.

Across the year

Republic on ORD to LGA through the year

Jul–Sep 202533 flights46.7%
Oct–Dec 2025194 flights64.1%
Jan–Mar 2026978 flights73.9%
Apr–Jun 202692 flights64.3%

Scale runs 40% to 80%. 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 71.0% on time across 1,297 flights.

Republic on ORD to LGA did not run the same all year. Its best quarter was Jan–Mar 2026 at 73.9% on time and its weakest Jul–Sep 2025 at 46.7%, a swing of 27 points on roughly 324 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, Tuesday is the strongest day at 80.0% on time and Monday the weakest at 64.9%. 15 points is a smaller lever than departure hour, but it is free.

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 24,000 reported delay minutes.

Late-arriving aircraft
35%
National Airspace System
33%
Carrier
23%
Extreme weather
9%

35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 24,000 reported delay minutes here, that single category outweighs weather by 4 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 23,578 reported delay minutes.

33% 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 7,795 minutes out of 24,000, against a national NAS share of 21%.

Cancellations run at 8.64%, against 1.81% nationally. That is about one flight in twelve 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.8% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The return leg runs 68.6% on time across 1,298 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

The sample behind these figures is 1,297 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 ORD to LGA

Put together: the delay figures matter less here than the 8.64% 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. 1,180 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures