Flight number record

DL 2101

Delta Air Lines · Seattle to Santa Ana

Route: SEA → SNA
Departs: 07:20
Flights: 256
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2101, check with Delta Air Lines.

DL 2101 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 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 256 flights, with a median arrival 10 minutes early.

Set against the rest of the country, DL 2101's record is 10 points better than the US average of 77.6%. That gap is worth roughly 101 fewer late arrivals for every thousand flights.

On time

87.7%

Arrivals under 15 minutes late, of 253 completed flights

Avg delay

78 min

Across delayed arrivals only, not all flights

Cancelled

1.17%

National rate is 1.81%

1 hour+ late

6.3%

National rate is 8.1%

These figures cover 256 flights between July 2025 and June 2026. The median arrival is 10 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 2101 flies

DL 2101 flies SEA to SNA without a single fixed slot. Its most common scheduled departure was 07:20, used on 88 of 256 flights, with 07:25 (52 flights) and 06:20 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:2088 flights34.4%
Departs 07:2552 flights20.3%
Departs 06:2035 flights13.7%

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 07:20 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 2101 runs level with that at 87.7%. 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 2101 next to SEA to SNA

Every carrier on SEA to SNA combined arrived on time 85.1% of the time across 3,967 flights, so DL 2101 is 3 points ahead of it. Delta flew 954 flights on the same city pair under all its flight numbers, including this one, and those ran 83.0% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 6 points.

DL 2101 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2101thin sample	256	87.7%	78 min	1.17%	A
All Delta Air Lines on SEA–SNA	954	83.0%	77 min	0.94%	B+
All carriers on SEA–SNA	3,967	85.1%	49 min	1.01%	A
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2101 quarter by quarter

Quarter by quarter DL 2101 held fairly steady: 87.0% in Jul–Sep 2025, 91.0% in Oct–Dec 2025, 83.0% in Jan–Mar 2026 and 88.9% 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 flights87.0%
Oct–Dec 202580 flights91.0%
Jan–Mar 202648 flights83.0%
Apr–Jun 202636 flights88.9%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2101 did best on Wednesday at 94.7% on time and worst on Monday at 80.0%. Each day rests on about 37 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2101 runs late

One category carries most of the weight here. Carrier accounts for 72% of the 2,427 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
72%
National Airspace System
16%
Late-arriving aircraft
12%

The largest share of delay minutes, 72%, 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 1,747 of the 2,427 delay minutes reported here. The split is drawn from 2,427 delay minutes reported on DL 2101.

Cancellations sit at 1.17% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

6.3% 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 a little over an hour, which a normal layover absorbs.

The 978 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.

DL 2101 is not only a SEA to SNA flight. It also flew SNA to SEA (256 flights, 87.6% 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. 256 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.

Other routes flown as DL 2101
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SNA to SEAthin sample	256	87.6%	80 min	1.95%	A

What to do with this

Booking DL 2101

For a booking, DL 2101 has one of the better records a US domestic flight can show: 87.7% on time and 1.17% 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