Carrier route record

B6FLL→ATL

JetBlue Airways · Fort Lauderdale to Atlanta

Flights: 647
Period: July 2025 to June 2026
Share of route: 9%
Carriers: 4

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

JetBlue on FLL to ATL earns a D, which is as low as this site's scale goes for a reason. Only 56.9% of flights arrive inside the 15-minute window, 21 points worse than the national rate of 77.6%. Late arrivals average about an hour. Treat any tight connection here as a coin flip. That rests on 647 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 4,268 at 78.9% on time.

Delta Air Lines is the most reliable of the three carriers covered here at 78.9% on time across 4,268 flights.

On time

56.9%

Arrivals under 15 minutes late, of 627 completed flights

Avg delay

64 min

Across delayed arrivals only, not all flights

Cancelled

2.94%

National rate is 1.81%

Whole route

71.8%

Every carrier on FLL to ATL, 7,185 flights

These figures cover 647 flights between July 2025 and June 2026. Beyond the headline rate, 15.2% 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

JetBlue against every carrier on FLL to ATL

JetBlue flew 647 of the 7,185 flights on FLL to ATL, about 9% of it. Its 56.9% on time is 15 points worse than the route as a whole, which runs 71.8%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from Delta at 78.9% to JetBlue at 56.9%.

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 78.9% of the time; Spirit Airlines manages 60.7%. Sample sizes sit next to every figure, because a two-point gap across 1,343 flights means less than a ten-point one.

On-time performance by carrier on FLL to ATL
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Lines	4,268	78.9%	74 min	1.66%	B
Frontier Airlines	927	65.0%	85 min	2.80%	C
Spirit Airlines	1,343	60.7%	67 min	3.43%	D−
JetBlue Airways (this page)	647	56.9%	64 min	2.94%	D

Spirit Airlines cancels 3.4% 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 JetBlue runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 40 points, against 18 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am25 flights—
8am–11am202 flights71.6%
11am–2pm—
2pm–5pm140 flights45.2%
5pm–8pm38 flights31.6%
8pm–5am242 flights52.4%

Scale runs 25% to 75%. Rows with fewer than 30 flights show a dash.

The 5pm–8pm window is where this operation falls apart: 31.6% on time, against 71.6% for the 8am–11am 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 8pm–5am window is the busiest, with 242 flights scheduled in it.

Across the year

JetBlue on FLL to ATL through the year

Darker means more delays. Figures are on-time percentages.November best, February worst

February is the weak month at 45.6% on time, against 68.9% in November. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. June was the busiest month here, with 90 flights.

Across the week, Tuesday is the strongest day at 71.4% on time and Sunday the weakest at 47.9%. 24 points is a smaller lever than departure hour, but it is free.

Delay causes

Why JetBlue runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 43% of the 17,000 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
43%
Carrier
29%
National Airspace System
26%
Extreme weather
2%

43% 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 17,000 reported delay minutes here, that single category outweighs weather by 25 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 17,218 reported delay minutes.

The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 71.6% on time here.

Cancellations run at 2.94%, against 1.81% nationally. That is roughly 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. 15.2% 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 581 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 70.2% on time across 647 flights, 13 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 13 points of difference.

One caution: this is a thin sample. 647 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 JetBlue on FLL to ATL

Put together: the delay figures matter less here than the 2.94% cancellation rate. A late arrival costs you about an hour; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 627 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