Carrier route record

F9IND→ATL

Frontier Airlines · Indianapolis to Atlanta

Flights: 141
Period: July 2025 to June 2026
Share of route: 4%
Carriers: 5

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

Frontier on IND to ATL draws a C. About one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 141 flights, with a median arrival 5 minutes early.

The national on-time rate over the same period is 77.6%, so Frontier on IND to ATL runs 12 points behind the country as a whole. Across a thousand flights that is about 124 extra late arrivals.

On time

65.2%

Arrivals under 15 minutes late, of 138 completed flights

Avg delay

71 min

Across delayed arrivals only, not all flights

Cancelled

2.13%

National rate is 1.81%

Whole route

88.5%

Every carrier on IND to ATL, 3,187 flights

These figures cover 141 flights between July 2025 and June 2026. Beyond the headline rate, 13.0% 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 IND to ATL

Frontier flew 141 of the 3,187 flights on IND to ATL, about 4% of it. Its 65.2% on time is 23 points worse than the route as a whole, which runs 88.5%. Ranked by on-time rate it is last of five carriers on the route, where the range runs from American at 100.0% to Frontier at 65.2%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on IND to ATL
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlinesthin sample	1	100.0%	—	0.00%	A+
Delta Air Lines	2,710	90.8%	78 min	1.44%	A
Southwest Airlinesthin sample	328	79.5%	51 min	0.00%	B+
Spirit Airlinesthin sample	7	71.4%	169 min	0.00%	C+
Frontier Airlines (this page)thin sample	141	65.2%	71 min	2.13%	C

Departure window

When Frontier runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 141 flights.

There are not enough flights in each departure window to split Frontier's IND to ATL record by time of day without the percentages moving on noise. The headline rate of 65.2% is the reliable figure here.

Across the year

Frontier on IND to ATL through the year

Jul–Sep 202533 flights59.4%
Oct–Dec 202529 flights—
Jan–Mar 202639 flights63.2%
Apr–Jun 202640 flights85.0%

Scale runs 50% to 90%. 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 65.2% on time across 141 flights.

Frontier on IND to ATL did not run the same all year. Its best quarter was Apr–Jun 2026 at 85.0% on time and its weakest Jul–Sep 2025 at 59.4%, a swing of 26 points on roughly 47 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, Friday is the strongest day at 70.5% on time and Monday the weakest at 62.5%. 8 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 68% of the 3,408 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
68%
National Airspace System
23%
Carrier
9%

68% 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 3,408 reported delay minutes here, that single category outweighs weather by 68 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 3,408 reported delay minutes.

Cancellations sit at 2.13% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

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. 13.0% 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.

At 432 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 11am–2pm window matters as much as it does.

The return leg runs 67.9% on time across 141 flights, within 3 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

One caution: this is a thin sample. 141 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 IND to ATL

Put together: treat all of this as provisional. 141 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 65.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 138 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