Carrier route record
DLBOS→MCO
Delta Air Lines · Boston to Orlando
- Flights
- 1,257
- Period
- July 2025 to June 2026
- Share of route
- 27%
- Carriers
- 6
Historical statistics for July 2025 to June 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 77.6%. 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 2,493 at 67.9% on time.
The US average over the same twelve months is 77.6%, 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.
Key figures
On time
75.4%
Arrivals under 15 minutes late, of 1,228 completed flights
Avg delay
80 min
Across delayed arrivals only, not all flights
Cancelled
2.15%
National rate is 1.81%
Whole route
70.1%
Every carrier on BOS to MCO, 4,606 flights
These figures cover 1,257 flights between July 2025 and June 2026. Beyond the headline rate, 10.5% 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
Delta against every carrier on BOS to MCO
Delta flew 1,257 of the 4,606 flights on BOS to MCO, about 27% of it. Its 75.4% on time is 5 points better than the route as a whole, which runs 70.1%. Ranked by on-time rate it is number two of six carriers on the route, where the range runs from American at 79.2% to Southwest at 50.0%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The two carriers here are closely matched: 4 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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| American Airlinesthin sample | 213 | 79.2% | 105 min | 2.82% | B |
| Delta Air Lines (this page) | 1,257 | 75.4% | 80 min | 2.15% | B |
| Frontier Airlinesthin sample | 124 | 69.9% | 66 min | 0.00% | C+ |
| JetBlue Airways | 2,493 | 67.9% | 73 min | 2.89% | C |
| Spirit Airlines | 515 | 63.5% | 80 min | 4.08% | D− |
| Southwest Airlinesthin sample | 4 | 50.0% | 19 min | 0.00% | F+ |
Spirit Airlines cancels 4.1% 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
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 32 points, against 4 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am365 flights89.9%
- 8am–11am24 flights—
- 11am–2pm167 flights81.7%
- 2pm–5pm350 flights66.8%
- 5pm–8pm198 flights70.4%
- 8pm–5am153 flights58.4%
Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 58.4% on time, against 89.9% 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
July is the worst month at 62.2% on time, 24 points below May, the best at 86.5%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. April was the busiest month here, with 130 flights.
Across the week, Wednesday is the strongest day at 83.1% on time and Sunday the weakest at 62.4%. 21 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Delta runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 43% of the 24,000 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.
- 43%Late-arriving aircraft
- 30%Carrier
- 25%National Airspace System
- 1%Extreme weather
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 24,000 reported delay minutes here, that single category outweighs weather by 38 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 24,140 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 89.9% on time here.
Cancellations sit at 2.15% against a national 1.81%, which is ordinary. Diversions add another 0.16%.
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. 10.5% 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 1,121 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. 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 76.0% on time across 1,257 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 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 July 62.2%, a swing of 24 points. If the dates move at all, move them out of July before you think about anything else. 1,228 completed flights over 12 months sit behind that.
Related
Where to go next
- BOS to MCO, every carrier
- Delta on MCO to BOS, the return leg
- American Airlines on BOS to MCO79.2%
- Frontier Airlines on BOS to MCO69.9%
- JetBlue Airways on BOS to MCO67.9%
- Spirit Airlines on BOS to MCO63.5%
- Delta Air Lines network-wide record
- Boston Logan International (BOS) delay statistics
- Orlando International (MCO) delay statistics
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
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.