Flight number record
DL 2120
Delta Air Lines · Los Angeles to Las Vegas
- Route
- LAX → LAS
- Departs
- 15:32
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2120, check with Delta Air Lines.
DL 2120 draws a C+. About one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 363 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so DL 2120 runs 12 points behind the country as a whole. Across a thousand flights that is about 119 extra late arrivals.
Key figures
On time
65.4%
Arrivals under 15 minutes late, of 361 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
13.9%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. Beyond the headline rate, 13.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2120 flies
DL 2120 flies LAX to LAS without a single fixed slot. Its most common scheduled departure was 15:32, used on 55 of 363 flights, with 15:10 (54 flights) and 15:05 (50 flights) next.
- Departs 15:3255 flights15.2%
- Departs 15:1054 flights14.9%
- Departs 15:0550 flights13.8%
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 15:32 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 2120 runs 7 points worse at 65.4%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 2120 next to LAX to LAS
Every carrier on LAX to LAS combined arrived on time 75.8% of the time across 8,202 flights, so DL 2120 is 10 points behind it. Delta flew 1,731 flights on the same city pair under all its flight numbers, including this one, and those ran 78.5% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 16 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2120thin sample | 363 | 65.4% | 66 min | 0.55% | C+ |
| All Delta Air Lines on LAX–LAS | 1,731 | 78.5% | 59 min | 0.81% | B+ |
| All carriers on LAX–LAS | 8,202 | 75.8% | 63 min | 0.77% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2120 quarter by quarter
DL 2120 did not run the same all year. Its best quarter was Jan–Mar 2026 at 75.6% on time and its weakest Jul–Sep 2025 at 46.7%, a swing of 29 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 flights46.7%
- Oct–Dec 202592 flights63.7%
- Jan–Mar 202690 flights75.6%
- Apr–Jun 202690 flights67.4%
- Jul–Sep 202661 flights59.0%
Scale runs 40% to 80%.
By weekday, DL 2120 did best on Tuesday at 80.8% on time and worst on Thursday at 53.8%. Each day rests on about 52 flights, so a gap of 27 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2120 runs when it is late
The 125 late arrivals split 37 under half an hour, 38 between 30 and 60 minutes, and 50 an hour or more.
- 15+ min early57 flights15.8%
- Within 15 min179 flights49.6%
- 15–29 min late37 flights10.2%
- 30–59 min late38 flights10.5%
- 1–2 hours late30 flights8.3%
- 2+ hours late20 flights5.5%
Scale runs 0% to 100%.
Share of 361 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 112 departures that left 15 minutes late or more, only 6 made it up before arrival. In the other direction, 19 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at LAS.
The worst days
Worst days for DL 2120
The latest arrival of the period was on 29 June 2026, 5 hours 43 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 29 June 2026 | 5 hours 43 minutes | Carrier |
| 16 July 2026 | 4 hours 13 minutes | Carrier |
| 26 September 2025 | 3 hours 51 minutes | Carrier |
| 18 September 2025 | 3 hours 19 minutes | National Airspace System |
| 4 May 2026 | 3 hours 18 minutes | Carrier |
Delay causes
Why DL 2120 runs late
Carrier accounts for 43% of the 8,210 delay minutes carriers reported here, and the remaining four split what is left.
- 43%Carrier
- 33%Late-arriving aircraft
- 24%National Airspace System
The largest share of delay minutes, 43%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,551 of the 8,210 delay minutes reported here. The split is drawn from 8,210 delay minutes reported on DL 2120.
Cancellations are rare at 0.55%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
13.9% 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 same number turns up on one other city pair in the data, including LAS to LAX (158), but none flew often enough under DL 2120 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAX to LAS only.
One caution: this is a thin sample. 363 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 2120
For a booking, DL 2120 is a flight to put a long connection behind. 13.9% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- LAX to LAS, every carrier and departure
- LAS to LAX, the return direction
- Delta Air Lines 2253 on the same route95.3%
- Delta Air Lines 2653 on the same route78.2%
- American Airlines 2785 on the same route72.5%
- Frontier Airlines 3292 on the same route79.2%
- United Airlines 1006 on the same route91.2%
- United Airlines 679 on the same route79.8%
- Los Angeles International (LAX) delay statistics
- Harry Reid International (LAS) 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.