Flight number record

DL 2393

Delta Air Lines · Raleigh to Boston

Route: RDU → BOS
Departs: 19:35
Flights: 268
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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, 5 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 268 flights, with a median arrival 9 minutes early.

The national on-time rate over the same period is 77.6%, so DL 2393 runs 5 points behind the country as a whole. Across a thousand flights that is about 54 extra late arrivals.

On time

72.2%

Arrivals under 15 minutes late, of 259 completed flights

Avg delay

84 min

Across delayed arrivals only, not all flights

Cancelled

3.36%

National rate is 1.81%

1 hour+ late

15.1%

National rate is 8.1%

These figures cover 268 flights between July 2025 and June 2026. Beyond the headline rate, 15.1% 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.

Schedule

When DL 2393 flies

DL 2393 flies RDU to BOS without a single fixed slot. Its most common scheduled departure was 19:35, used on 60 of 268 flights, with 20:25 (50 flights) and 20:20 (30 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 19:3560 flights22.4%
Departs 20:2550 flights18.7%
Departs 20:2030 flights11.2%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 19:35 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and DL 2393 runs 4 points better at 72.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 2393 next to RDU to BOS

Every carrier on RDU to BOS combined arrived on time 78.8% of the time across 2,815 flights, so DL 2393 is 7 points behind it. Delta flew 1,436 flights on the same city pair under all its flight numbers, including this one, and those ran 80.4% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 9 points.

DL 2393 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2393thin sample	268	72.2%	84 min	3.36%	C−
All Delta Air Lines on RDU–BOS	1,436	80.4%	87 min	2.51%	B
All carriers on RDU–BOS	2,815	78.8%	82 min	2.59%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	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 2025 at 53.1%, a swing of 35 points on roughly 67 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 202564 flights53.1%
Oct–Dec 202570 flights71.2%
Jan–Mar 202663 flights88.1%
Apr–Jun 202671 flights77.1%

Scale runs 45% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2393 did best on Wednesday at 78.3% on time and worst on Sunday at 61.8%. Each day rests on about 38 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2393 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 67% of the 6,054 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
67%
National Airspace System
18%
Carrier
13%
Extreme weather
2%

67% 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 6,054 reported delay minutes here, that single category outweighs weather by 36 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 6,054 delay minutes reported on DL 2393.

Cancellations run at 3.36%, against 1.81% nationally. That is about 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 routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 15.1% 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 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. 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.

Every one of the 268 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. 268 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: 3.36% of its 268 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.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures