Carrier route record

B6SJU→MCO

JetBlue Airways · San Juan to Orlando

Flights: 2,130
Period: July 2025 to June 2026
Share of route: 35%
Carriers: 4

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

JetBlue on SJU to MCO 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 2,130 flights. The strongest carrier on the route with a full sample, Southwest Airlines, flew 2,067 at 81.6% on time.

Southwest Airlines is the most reliable of the three carriers covered here at 81.6% on time across 2,067 flights.

On time

76.9%

Arrivals under 15 minutes late, of 2,095 completed flights

Avg delay

72 min

Across delayed arrivals only, not all flights

Cancelled

1.03%

National rate is 1.81%

Whole route

78.9%

Every carrier on SJU to MCO, 6,048 flights

These figures cover 2,130 flights between July 2025 and June 2026. Beyond the headline rate, 9.3% 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 SJU to MCO

JetBlue flew 2,130 of the 6,048 flights on SJU to MCO, about 35% of it. Its 76.9% on time is 2 points worse than the route as a whole, which runs 78.9%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from Southwest at 81.6% to JetBlue at 76.9%.

The three carriers here are closely matched: 5 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 SJU to MCO
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	2,067	81.6%	47 min	0.53%	B+
Frontier Airlines	1,240	78.9%	138 min	1.37%	B
Spirit Airlines	611	77.1%	78 min	1.80%	B
JetBlue Airways (this page)	2,130	76.9%	72 min	1.03%	B

No carrier stands out. Southwest tops the table at 81.6%, 5 points clear of the bottom, which is inside the range this kind of sample moves year to year.

Flight by flight

JetBlue flight numbers on SJU to MCO

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 31 points, against 5 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am399 flights93.6%
8am–11am299 flights84.4%
11am–2pm358 flights77.3%
2pm–5pm328 flights62.7%
5pm–8pm280 flights73.5%
8pm–5am466 flights69.7%

Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 93.6% of the time, against 62.7% for the afternoon window. That is 31 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 466 flights scheduled in it.

Across the year

JetBlue on SJU to MCO through the year

Darker means more delays. Figures are on-time percentages.May best, January worst

January is the weak month at 68.8% on time, against 90.1% in May. 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 231 flights.

Across the week, Tuesday is the strongest day at 82.5% on time and Sunday the weakest at 66.8%. 16 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 56% of the 35,000 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
56%
Carrier
35%
National Airspace System
8%
Extreme weather
0%
Security
0%

56% 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 35,000 reported delay minutes here, that single category outweighs weather by 56 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 34,874 reported delay minutes.

The largest share of delay minutes, 35%, 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 12,000 of the 35,000 delay minutes reported here.

Cancellations sit at 1.03% against a national 1.81%, which is ordinary. Diversions add another 0.61%.

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. 9.3% 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 1,188 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 76.4% on time across 2,134 flights, within half a point 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 2,130 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 JetBlue on SJU to MCO

Put together: the calendar is the biggest lever here, not the carrier or the hour. May runs 90.1% on time and January 68.8%, a swing of 21 points. If the dates move at all, move them out of January before you think about anything else. 2,095 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