Flight number record

DL 1022

Delta Air Lines · Raleigh to Boston

Route: RDU → BOS
Departs: 09:30
Flights: 304
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1022, check with Delta Air Lines.

DL 1022 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 304 flights, with a median arrival 14 minutes early.

Set against the rest of the country, DL 1022's record is 11 points better than the US average of 77.6%. That gap is worth roughly 113 fewer late arrivals for every thousand flights.

On time

88.9%

Arrivals under 15 minutes late, of 296 completed flights

Avg delay

90 min

Across delayed arrivals only, not all flights

Cancelled

2.63%

National rate is 1.81%

1 hour+ late

5.7%

National rate is 8.1%

These figures cover 304 flights between July 2025 and June 2026. The median arrival is 14 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When DL 1022 flies

DL 1022 flies RDU to BOS without a single fixed slot. Its most common scheduled departure was 09:30, used on 56 of 304 flights, with 10:05 (46 flights) and 09:55 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:3056 flights18.4%
Departs 10:0546 flights15.1%
Departs 09:5535 flights11.5%

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 09:30 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 1022 runs 5 points better at 88.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 1022 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 1022 is 10 points ahead of 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 beats by 7 points.

DL 1022 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1022thin sample	304	88.9%	90 min	2.63%	A
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 1022 quarter by quarter

DL 1022 did not run the same all year. Its best quarter was Apr–Jun 2026 at 96.1% on time and its weakest Oct–Dec 2025 at 84.4%, a swing of 12 points on roughly 76 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 202577 flights88.0%
Oct–Dec 202578 flights84.4%
Jan–Mar 202670 flights86.6%
Apr–Jun 202679 flights96.1%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1022 did best on Wednesday at 93.9% on time and worst on Thursday at 80.4%. Each day rests on about 43 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1022 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 75% of the 2,984 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
75%
National Airspace System
18%
Carrier
8%

75% 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 2,984 reported delay minutes here, that single category outweighs weather by 75 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 2,984 delay minutes reported on DL 1022.

Cancellations run at 2.63%, against 1.81% nationally. That is about one flight in 40 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

5.7% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.

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.

The same number turns up on five other city pairs in the data, including ATL to HDN (16), HDN to ATL (16) and BOS to LGA (5), but none flew often enough under DL 1022 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to RDU to BOS only.

One caution: this is a thin sample. 304 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 1022

For a booking, the cancellation rate is the figure to plan around on DL 1022: 2.63% of its 304 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