Carrier route record

DLBOS→MCO

Delta Air Lines · Boston to Orlando

Flights: 1,257
Period: September 2025 to August 2026
Share of route: 27%
Carriers: 6

Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.

Delta on BOS to MCO sits in the middle of the pack with a B. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 1,257 flights. The strongest carrier on the route with a full sample, JetBlue Airways, flew 2,520 at 66.6% on time.

The US average over the same twelve months is 77.3%, so there is little to separate Delta on BOS to MCO from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

75.5%

Arrivals under 15 minutes late, of 1,226 completed flights

Avg delay

79 min

Across delayed arrivals only, not all flights

Cancelled

2.23%

National rate is 1.89%

Whole route

69.5%

Every carrier on BOS to MCO, 4,605 flights

These figures cover 1,257 flights between September 2025 and August 2026. Beyond the headline rate, 10.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Carrier by carrier

Delta against every carrier on BOS to MCO

Delta flew 1,257 of the 4,605 flights on BOS to MCO, about 27% of it. Its 75.5% on time is 6 points better than the route as a whole, which runs 69.5%. Ranked by on-time rate it is number two of six carriers on the route, where the range runs from American at 80.7% to Southwest at 50.0%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The choice of carrier is not cosmetic here. JetBlue Airways arrives on time 66.6% of the time; Spirit Airlines manages 58.5%. Sample sizes sit next to every figure, because a two-point gap across 389 flights means less than a ten-point one.

On-time performance by carrier on BOS to MCO
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlinesthin sample	284	80.7%	109 min	2.82%	B
Delta Air Lines (this page)	1,257	75.5%	79 min	2.23%	B
Frontier Airlinesthin sample	151	74.0%	73 min	0.00%	C+
JetBlue Airways	2,520	66.6%	74 min	3.61%	C−
Spirit Airlines	389	58.5%	82 min	4.88%	D−
Southwest Airlinesthin sample	4	50.0%	19 min	0.00%	F+

Spirit Airlines cancels 4.9% 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.

Flight by flight

Delta flight numbers on BOS to MCO

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Departure window

When Delta 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 8 points between the best and worst carrier.

5am–8am365 flights90.1%
8am–11am24 flights—
11am–2pm167 flights81.7%
2pm–5pm349 flights66.3%
5pm–8pm191 flights71.4%
8pm–5am161 flights59.2%

Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.

The 8pm–5am window is where this operation falls apart: 59.2% on time, against 90.1% 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 5am–8am window is the busiest, with 365 flights scheduled in it.

Across the year

Delta on BOS to MCO through the year

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

May is the best month on the calendar at 86.5% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. April was the busiest month here, with 130 flights.

Across the week, Wednesday is the strongest day at 84.7% on time and Sunday the weakest at 64.0%, a spread of 21 points.

Arrival by arrival

How late Delta on BOS to MCO runs when it is late

Delta on BOS to MCO often beats the schedule: 420 of 1,226 completed flights, 34%, arrived 15 minutes or more early. The 300 late arrivals split 90 under half an hour, 85 between 30 and 60 minutes, and 125 an hour or more.

15+ min early420 flights34.3%
Within 15 min506 flights41.3%
15–29 min late90 flights7.3%
30–59 min late85 flights6.9%
1–2 hours late63 flights5.1%
2+ hours late62 flights5.1%

Scale runs 0% to 100%.

Share of 1,226 completed flights by arrival against schedule.

70 of 291 late departures made up the time and arrived on time, 24% of them. In the other direction, 79 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at MCO.

The worst days

Worst days for Delta on BOS to MCO

The latest arrival of the period was on 26 January 2026, 15 hours 45 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.

The latest arrivals of Delta on BOS to MCO in the period
Date	Arrived late by	Largest filed cause
26 January 2026	15 hours 45 minutes	Carrier
13 October 2025	15 hours 20 minutes	Carrier
16 March 2026	12 hours 33 minutes	National Airspace System
15 June 2026	6 hours 15 minutes	Carrier
11 March 2026	5 hours 13 minutes	Carrier

Delay causes

Why Delta runs late on this route

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 24,000 reported delay minutes.

Late-arriving aircraft
41%
Carrier
33%
National Airspace System
25%
Extreme weather
1%

41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 24,000 reported delay minutes here, that single category outweighs weather by 33 to one. The split is drawn from 23,580 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 90.1% on time here.

Cancellations sit at 2.23% against a national 1.89%, which is ordinary. Diversions add another 0.24%.

Connections and stage length

What a delay here costs

10.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.

The 1,121 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.

The return leg runs 77.0% on time across 1,257 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.

The sample behind these figures is 1,257 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 Delta on BOS to MCO

Put together: the calendar is the biggest lever here, not the carrier or the hour. May runs 86.5% on time and September 65.6%, a swing of 21 points. If the dates move at all, move them out of September before you think about anything else. 1,226 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures