Flight number record

DL 338

Delta Air Lines · Seattle to Fort Lauderdale

Route: SEA → FLL
Departs: 11:55
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 338, check with Delta Air Lines.

DL 338 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.6%. The late ones land roughly 55 minutes behind schedule. That rests on 364 flights, with a median arrival 2 minutes early.

On time

73.8%

Arrivals under 15 minutes late, of 355 completed flights

Avg delay

53 min

Across delayed arrivals only, not all flights

Cancelled

1.65%

National rate is 1.81%

1 hour+ late

6.5%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. The median arrival is 2 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 338 flies

DL 338 flies SEA to FLL without a single fixed slot. Its most common scheduled departure was 11:55, used on 96 of 364 flights, with 11:59 (92 flights) and 12:05 (54 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 11:5596 flights26.4%
Departs 11:5992 flights25.3%
Departs 12:0554 flights14.8%

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 11:55 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 338 runs 5 points worse at 73.8%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 338 next to SEA to FLL

Every carrier on SEA to FLL combined arrived on time 78.1% of the time across 826 flights, so DL 338 is 4 points behind it. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 8 points.

DL 338 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 338thin sample	364	73.8%	53 min	1.65%	C
All Delta Air Lines on SEA–FLLthin sample	364	73.8%	53 min	1.65%	C
All carriers on SEA–FLL	826	78.1%	50 min	0.97%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 338 quarter by quarter

DL 338 did not run the same all year. Its best quarter was Jul–Sep 2025 at 80.0% on time and its weakest Jan–Mar 2026 at 63.2%, a swing of 17 points on roughly 91 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 flights80.0%
Oct–Dec 202591 flights72.7%
Jan–Mar 202690 flights63.2%
Apr–Jun 202691 flights78.9%

Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 338 did best on Wednesday at 86.3% on time and worst on Sunday at 62.0%. Each day rests on about 52 flights, so a gap of 24 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 338 runs late

One category carries most of the weight here. Carrier accounts for 53% of the 4,941 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
53%
National Airspace System
27%
Late-arriving aircraft
20%

The largest share of delay minutes, 53%, 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 2,627 of the 4,941 delay minutes reported here. The split is drawn from 4,941 delay minutes reported on DL 338.

Cancellations sit at 1.65% against a national 1.81%, which is ordinary. Diversions add another 0.82%.

Connections and routes

What a delay on this flight costs

6.5% 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 55 minutes, which a normal layover absorbs.

At 2,717 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.

The same number turns up on one other city pair in the data, including FLL to SEA (97), but none flew often enough under DL 338 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to FLL only.

One caution: this is a thin sample. 364 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 338

For a booking, read DL 338 as 73.8% on time with 1.65% cancelled over 364 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