Carrier route record

F9ATL→BDL

Frontier Airlines · Atlanta to Hartford

Flights: 117
Period: July 2025 to June 2026
Share of route: 5%
Carriers: 2

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

Frontier on ATL to BDL lands a B, level with the national rate of 77.6%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 117 flights, with a median arrival 7 minutes early.

The US average over the same twelve months is 77.6%, so there is little to separate Frontier on ATL to BDL from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

77.4%

Arrivals under 15 minutes late, of 115 completed flights

Avg delay

78 min

Across delayed arrivals only, not all flights

Cancelled

1.71%

National rate is 1.81%

Whole route

79.2%

Every carrier on ATL to BDL, 2,328 flights

These figures cover 117 flights between July 2025 and June 2026. The median arrival is 7 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Carrier by carrier

Frontier against every carrier on ATL to BDL

Frontier flew 117 of the 2,328 flights on ATL to BDL, about 5% of it. Its 77.4% on time is 2 points worse than the route as a whole, which runs 79.2%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Delta at 79.3% to Frontier at 77.4%.

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 ATL to BDL
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Lines	2,211	79.3%	62 min	2.04%	B
Frontier Airlines (this page)thin sample	117	77.4%	78 min	1.71%	B

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 117 flights.

There are not enough flights in each departure window to split Frontier's ATL to BDL record by time of day without the percentages moving on noise. The headline rate of 77.4% is the reliable figure here.

Across the year

Frontier on ATL to BDL through the year

Jul–Sep 202533 flights78.8%
Oct–Dec 202538 flights81.1%
Jan–Mar 202625 flights—
Apr–Jun 202621 flights—

Scale runs 70% to 85%. 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 77.4% on time across 117 flights.

Split by quarter, Frontier on ATL to BDL logged 33 flights in Jul–Sep 2025, 38 flights in Oct–Dec 2025, 25 flights in Jan–Mar 2026 and 21 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 77.4% annual figure is the one to use.

Across the week, Thursday is the strongest day at 80.5% on time and Sunday the weakest at 68.3%. 12 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. Carrier accounts for 47% of the 2,039 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.

Carrier
47%
Late-arriving aircraft
37%
National Airspace System
12%
Extreme weather
5%

37% 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 2,039 reported delay minutes here, that single category outweighs weather by 7 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 2,039 reported delay minutes.

The largest share of delay minutes, 47%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 951 of the 2,039 delay minutes reported here.

Cancellations sit at 1.71% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and stage length

What a delay here costs

7.0% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

The 859 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 75.7% on time across 116 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.

One caution: this is a thin sample. 117 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 ATL to BDL

Put together: treat all of this as provisional. 117 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 77.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 115 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