Flight number record
DL 2393
Delta Air Lines · Raleigh to Boston
- Route
- RDU → BOS
- Departs
- 19:55
- Flights
- 275
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2393, check with Delta Air Lines.
DL 2393 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 275 flights, with a median arrival 8 minutes early.
The national on-time rate over the same period is 77.3%, so DL 2393 runs 6 points behind the country as a whole. Across a thousand flights that is about 56 extra late arrivals.
Key figures
On time
71.7%
Arrivals under 15 minutes late, of 265 completed flights
Avg delay
90 min
Across delayed arrivals only, not all flights
Cancelled
3.64%
National rate is 1.89%
1 hour+ late
15.1%
National rate is 8.3%
These figures cover 275 flights between September 2025 and August 2026. Beyond the headline rate, 15.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2393 flies
DL 2393 flies RDU to BOS without a single fixed slot. Its most common scheduled departure was 19:55, used on 60 of 275 flights, with 19:35 (60 flights) and 20:25 (50 flights) next.
- Departs 19:5560 flights21.8%
- Departs 19:3560 flights21.8%
- Departs 20:2550 flights18.2%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 19:55 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 2393 runs 4 points better at 71.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 2393 next to RDU to BOS
Every carrier on RDU to BOS combined arrived on time 78.5% of the time across 2,847 flights, so DL 2393 is 7 points behind it. Delta flew 1,435 flights on the same city pair under all its flight numbers, including this one, and those ran 79.6% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2393thin sample | 275 | 71.7% | 90 min | 3.64% | C− |
| All Delta Air Lines on RDU–BOS | 1,435 | 79.6% | 89 min | 2.72% | B |
| All carriers on RDU–BOS | 2,847 | 78.5% | 83 min | 2.95% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2393 quarter by quarter
DL 2393 did not run the same all year. Its best quarter was Jan–Mar 2026 at 88.1% on time and its weakest Jul–Sep 2026 at 59.6%, a swing of 28 points on roughly 69 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202518 flights—
- Oct–Dec 202570 flights71.2%
- Jan–Mar 202663 flights88.1%
- Apr–Jun 202671 flights77.1%
- Jul–Sep 202653 flights59.6%
Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2393 did best on Wednesday at 78.7% on time and worst on Sunday at 61.8%. Each day rests on about 39 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2393 runs when it is late
DL 2393 often beats the schedule: 106 of 265 completed flights, 40%, arrived 15 minutes or more early. When DL 2393 is late it tends to be very late: 40 of its 75 late arrivals were an hour or more behind, and 24 were two hours or more.
- 15+ min early106 flights40.0%
- Within 15 min84 flights31.7%
- 15–29 min late12 flights4.5%
- 30–59 min late23 flights8.7%
- 1–2 hours late16 flights6.0%
- 2+ hours late24 flights9.1%
Scale runs 0% to 100%.
Share of 265 completed flights by arrival against schedule.
12 of 82 late departures made up the time and arrived on time, 15% of them. Only 5 left on time and still arrived late.
The worst days
Worst days for DL 2393
The latest arrival of the period was on 21 August 2026, 4 hours 51 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 August 2026 | 4 hours 51 minutes | Late-arriving aircraft |
| 6 July 2026 | 4 hours 14 minutes | Late-arriving aircraft |
| 13 October 2025 | 3 hours 54 minutes | Late-arriving aircraft |
| 25 September 2025 | 3 hours 50 minutes | Late-arriving aircraft |
| 1 December 2025 | 3 hours 12 minutes | Late-arriving aircraft |
Delay causes
Why DL 2393 runs late
Late-arriving aircraft accounts for 67% of the 6,740 delay minutes carriers reported here, and the remaining four split what is left.
- 67%Late-arriving aircraft
- 16%Carrier
- 12%National Airspace System
- 4%Extreme weather
67% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 6,740 reported delay minutes here, that single category outweighs weather by 16 to one. The split is drawn from 6,740 delay minutes reported on DL 2393.
Cancellations run at 3.64%, against 1.89% nationally. That is roughly one flight in 25 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 routes
What a delay on this flight costs
15.1% 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 612 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.
Every one of the 275 flights under DL 2393 in the data flew RDU to BOS. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 275 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 DL 2393
For a booking, the cancellation rate is the figure to plan around on DL 2393: 3.64% of its 275 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- RDU to BOS, every carrier and departure
- BOS to RDU, the return direction
- Delta Air Lines 1054 on the same route92.5%
- JetBlue Airways 484 on the same route84.3%
- Delta Air Lines 1022 on the same route88.0%
- Delta Air Lines 1033 on the same route74.5%
- Raleigh-Durham International (RDU) delay statistics
- Boston Logan International (BOS) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.