Carrier route record

F9ORD→CLT

Frontier Airlines · Chicago to Charlotte

Flights: 157
Period: July 2025 to June 2026
Share of route: 4%
Carriers: 6

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

Frontier on ORD to CLT draws a C−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is close to two hours behind schedule. Build slack into anything you connect to. That rests on 157 flights. The strongest carrier on the route with a full sample, Republic Airways, flew 377 at 79.7% on time.

Republic Airways is the most reliable of the three carriers covered here at 79.7% on time across 377 flights.

On time

67.1%

Arrivals under 15 minutes late, of 152 completed flights

Avg delay

121 min

Across delayed arrivals only, not all flights

Cancelled

3.18%

National rate is 1.81%

Whole route

73.5%

Every carrier on ORD to CLT, 4,306 flights

These figures cover 157 flights between July 2025 and June 2026. Beyond the headline rate, 19.1% 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

Frontier against every carrier on ORD to CLT

Frontier flew 157 of the 4,306 flights on ORD to CLT, about 4% of it. Its 67.1% on time is 6 points worse than the route as a whole, which runs 73.5%. Ranked by on-time rate it is number five of six carriers on the route, where the range runs from Spirit at 100.0% to SkyWest at 53.6%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The choice of carrier is not cosmetic here. Republic Airways arrives on time 79.7% of the time; United Airlines manages 70.6%. Sample sizes sit next to every figure, because a two-point gap across 612 flights means less than a ten-point one.

On-time performance by carrier on ORD to CLT
Airline	Flights	On time	Avg delay	Cancelled	Grade
Spirit Airlinesthin sample	1	100.0%	—	0.00%	A+
Republic Airways	377	79.7%	78 min	2.12%	B
American Airlines	2,999	74.6%	85 min	2.43%	C
United Airlines	612	70.6%	76 min	0.98%	C+
Frontier Airlines (this page)thin sample	157	67.1%	121 min	3.18%	C−
SkyWest Airlinesthin sample	160	53.6%	52 min	4.38%	F−

Republic leads United by 9 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

Departure window

When Frontier runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 46 points, against 9 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am42 flights83.3%
8am–11am9 flights—
11am–2pm53 flights74.5%
2pm–5pm16 flights—
5pm–8pm37 flights37.1%
8pm–5am—

Scale runs 30% to 90%. Rows with fewer than 30 flights show a dash.

The 5pm–8pm window is where this operation falls apart: 37.1% on time, against 83.3% 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 11am–2pm window is the busiest, with 53 flights scheduled in it.

Across the year

Frontier on ORD to CLT through the year

Jul–Sep 202531 flights64.5%
Oct–Dec 202558 flights75.0%
Jan–Mar 202647 flights56.8%
Apr–Jun 202621 flights—

Scale runs 50% 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 67.1% on time across 157 flights.

Frontier on ORD to CLT did not run the same all year. Its best quarter was Oct–Dec 2025 at 75.0% on time and its weakest Jan–Mar 2026 at 56.8%, a swing of 18 points on roughly 52 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, Monday is the strongest day at 81.2% on time and Sunday the weakest at 60.5%. 21 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Frontier runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 60% of the 6,040 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
60%
Carrier
28%
National Airspace System
10%
Extreme weather
2%

60% 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 6,040 reported delay minutes here, that single category outweighs weather by 37 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 6,040 reported delay minutes.

The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 83.3% on time here.

Cancellations run at 3.18%, against 1.81% nationally. That is about one flight in 30 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. 19.1% 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 599 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 is a different operation and performs like one: it runs 62.4% on time across 157 flights, 5 points below 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 5 points of difference.

One caution: this is a thin sample. 157 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking Frontier on ORD to CLT

Put together: the delay figures matter less here than the 3.18% cancellation rate. A late arrival costs you close to two hours; 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. 152 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