Flight number record
DL 874
Delta Air Lines · Atlanta to Boise
- Route
- ATL → BOI
- Departs
- 10:00
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 874, check with Delta Air Lines.
DL 874 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 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 365 flights, with a median arrival 6 minutes early.
Set against the rest of the country, DL 874's record is 13 points better than the US average of 77.3%. That gap is worth roughly 127 fewer late arrivals for every thousand flights.
Key figures
On time
90.0%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
47 min
Across delayed arrivals only, not all flights
Cancelled
1.64%
National rate is 1.89%
1 hour+ late
1.9%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 6 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.
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Schedule
When DL 874 flies
DL 874 flies ATL to BOI without a single fixed slot. Its most common scheduled departure was 10:00, used on 85 of 365 flights, with 09:50 (47 flights) and 10:03 (39 flights) next.
- Departs 10:0085 flights23.3%
- Departs 09:5047 flights12.9%
- Departs 10:0339 flights10.7%
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 10:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 874 runs 6 points better at 90.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 874 next to ATL to BOI
Every carrier on ATL to BOI combined arrived on time 81.9% of the time across 548 flights, so DL 874 is 8 points ahead of it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 874 | 365 | 90.0% | 47 min | 1.64% | A |
| All Delta Air Lines on ATL–BOI | 548 | 81.9% | 47 min | 1.28% | B |
| All carriers on ATL–BOI | 548 | 81.9% | 47 min | 1.28% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 874 quarter by quarter
DL 874 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Oct–Dec 2025 at 83.3%, a swing of 17 points on roughly 73 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 202530 flights100.0%
- Oct–Dec 202592 flights83.3%
- Jan–Mar 202690 flights87.2%
- Apr–Jun 202691 flights95.6%
- Jul–Sep 202662 flights90.3%
Scale runs 75% to 100%.
By weekday, DL 874 ranged from 82.7% on Wednesday to 94.1% on Tuesday. With about 52 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 874 runs when it is late
Most of the lateness is short. 18 of the 36 late arrivals were under half an hour behind, and 7 reached an hour or more.
- 15+ min early82 flights22.8%
- Within 15 min241 flights67.1%
- 15–29 min late18 flights5.0%
- 30–59 min late11 flights3.1%
- 1–2 hours late4 flights1.1%
- 2+ hours late3 flights0.8%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
A late pushback is often recovered here: of 35 departures that left 15 minutes late or more, 11 still arrived on time. 12 flights left on time and still arrived late.
The worst days
Worst days for DL 874
The latest arrival of the period was on 18 March 2026, 3 hours 39 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across March, May, April and January, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 March 2026 | 3 hours 39 minutes | Carrier |
| 4 May 2026 | 3 hours 4 minutes | Carrier |
| 28 April 2026 | 2 hours 7 minutes | Late-arriving aircraft |
| 10 January 2026 | 1 hour 57 minutes | National Airspace System |
| 16 March 2026 | 1 hour 32 minutes | Late-arriving aircraft |
Delay causes
Why DL 874 runs late
Carrier accounts for 48% of the 1,706 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Carrier
- 27%National Airspace System
- 25%Late-arriving aircraft
The largest share of delay minutes, 48%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 815 of the 1,706 delay minutes reported here. The split is drawn from 1,706 delay minutes reported on DL 874.
Cancellations sit at 1.64% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 1.9% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 1,838 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
DL 874 is not only a ATL to BOI flight. It also flew BOI to ATL (365 flights, 88.2% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 365 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| BOI to ATL | 365 | 88.2% | 89 min | 1.64% | A |
What to do with this
Booking DL 874
For a booking, read DL 874 as 90.0% on time with 1.64% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- Hartsfield-Jackson Atlanta International (ATL) 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
- Worst months to fly in the US, ranked by the data
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.