Flight number record

DL 2949

Delta Air Lines · Seattle to Las Vegas

Route: SEA → LAS
Departs: 20:20
Flights: 359
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2949, check with Delta Air Lines.

DL 2949 lands a B+, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 50 minutes on average. That is a workable record, not a spotless one. That rests on 359 flights, with a median arrival 8 minutes early.

On time

81.0%

Arrivals under 15 minutes late, of 358 completed flights

Avg delay

52 min

Across delayed arrivals only, not all flights

Cancelled

0.28%

National rate is 1.81%

1 hour+ late

5.3%

National rate is 8.1%

These figures cover 359 flights between July 2025 and June 2026. The median arrival is 8 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 2949 flies

DL 2949 flies SEA to LAS without a single fixed slot. Its most common scheduled departure was 20:20, used on 75 of 359 flights, with 19:59 (71 flights) and 20:25 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 20:2075 flights20.9%
Departs 19:5971 flights19.8%
Departs 20:2536 flights10.0%

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 20:20 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 2949 runs 11 points better at 81.0%. 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 2949 next to SEA to LAS

Every carrier on SEA to LAS combined arrived on time 77.7% of the time across 5,650 flights, so DL 2949 is 3 points ahead of it. Delta flew 1,738 flights on the same city pair under all its flight numbers, including this one, and those ran 83.6% on time. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 2949 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2949thin sample	359	81.0%	52 min	0.28%	B+
All Delta Air Lines on SEA–LAS	1,738	83.6%	56 min	0.86%	B+
All carriers on SEA–LAS	5,650	77.7%	54 min	0.83%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2949 quarter by quarter

Quarter by quarter DL 2949 held fairly steady: 81.5% in Jul–Sep 2025, 85.2% in Oct–Dec 2025, 77.3% in Jan–Mar 2026 and 80.0% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights81.5%
Oct–Dec 202588 flights85.2%
Jan–Mar 202689 flights77.3%
Apr–Jun 202690 flights80.0%

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2949 did best on Tuesday at 86.8% on time and worst on Thursday at 69.4%. Each day rests on about 51 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2949 runs late

One category carries most of the weight here. Carrier accounts for 58% of the 3,520 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.

Carrier
58%
National Airspace System
28%
Late-arriving aircraft
14%

The largest share of delay minutes, 58%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,041 of the 3,520 delay minutes reported here. The split is drawn from 3,520 delay minutes reported on DL 2949.

Cancellations are rare at 0.28%, below the national 1.81% 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

5.3% 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 roughly 50 minutes, which a normal layover absorbs.

The 867 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 359 flights under DL 2949 in the data flew SEA to LAS. 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. 359 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 2949

For a booking, read DL 2949 as 81.0% on time with 0.28% cancelled over 359 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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