Flight number record

DL 2830

Delta Air Lines · Seattle to Los Angeles

Route: SEA → LAX
Departs: 13:30
Flights: 349
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2830, check with Delta Air Lines.

DL 2830 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 349 flights, with a median arrival 7 minutes early.

Set against the rest of the country, DL 2830's record is 9 points better than the US average of 77.6%. That gap is worth roughly 85 fewer late arrivals for every thousand flights.

On time

86.1%

Arrivals under 15 minutes late, of 346 completed flights

Avg delay

58 min

Across delayed arrivals only, not all flights

Cancelled

0.86%

National rate is 1.81%

1 hour+ late

3.5%

National rate is 8.1%

These figures cover 349 flights between July 2025 and June 2026. The median arrival is 7 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 2830 flies

DL 2830 flies SEA to LAX without a single fixed slot. Its most common scheduled departure was 13:30, used on 50 of 349 flights, with 14:24 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:3050 flights14.3%
Departs 14:2435 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 13:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 2830 runs 7 points better at 86.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 2830 next to SEA to LAX

Every carrier on SEA to LAX combined arrived on time 83.4% of the time across 7,428 flights, so DL 2830 is 3 points ahead of it. Delta flew 2,225 flights on the same city pair under all its flight numbers, including this one, and those ran 84.5% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 5 points.

DL 2830 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2830thin sample	349	86.1%	58 min	0.86%	A+
All Delta Air Lines on SEA–LAX	2,225	84.5%	59 min	0.67%	B+
All carriers on SEA–LAX	7,428	83.4%	59 min	0.92%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2830 quarter by quarter

DL 2830 did not run the same all year. Its best quarter was Jul–Sep 2025 at 92.4% on time and its weakest Jan–Mar 2026 at 80.0%, a swing of 12 points on roughly 87 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 202592 flights92.4%
Oct–Dec 202580 flights87.3%
Jan–Mar 202686 flights80.0%
Apr–Jun 202691 flights84.4%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2830 did best on Tuesday at 94.0% on time and worst on Sunday at 77.1%. Each day rests on about 50 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2830 runs late

One category carries most of the weight here. Carrier accounts for 64% of the 2,771 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
64%
Late-arriving aircraft
26%
National Airspace System
10%

The largest share of delay minutes, 64%, 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 1,766 of the 2,771 delay minutes reported here. The split is drawn from 2,771 delay minutes reported on DL 2830.

Cancellations are rare at 0.86%, 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

Badly late arrivals are rare here: only 3.5% land an hour or more behind schedule, against 8.1% 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.

The 954 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 one other city pair in the data, including SEA to PDX (16), but none flew often enough under DL 2830 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to LAX only.

One caution: this is a thin sample. 349 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 2830

For a booking, DL 2830 has one of the better records a US domestic flight can show: 86.1% on time and 0.86% cancelled. That is a base rate, not a promise about any single 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