Flight number record

DL 1706

Delta Air Lines · Seattle to Detroit

Route: SEA → DTW
Departs: 11:43
Flights: 302
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1706, check with Delta Air Lines.

DL 1706 lands a B+, 2 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 302 flights, with a median arrival 3 minutes early.

On time

80.0%

Arrivals under 15 minutes late, of 300 completed flights

Avg delay

52 min

Across delayed arrivals only, not all flights

Cancelled

0.66%

National rate is 1.81%

1 hour+ late

4.7%

National rate is 8.1%

These figures cover 302 flights between July 2025 and June 2026. The median arrival is 3 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 1706 flies

DL 1706 flies SEA to DTW without a single fixed slot. Its most common scheduled departure was 11:43, used on 61 of 302 flights, with 11:45 (51 flights) and 09:55 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 11:4361 flights20.2%
Departs 11:4551 flights16.9%
Departs 09:5536 flights11.9%

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 11:43 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 1706 runs level with that at 80.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 1706 next to SEA to DTW

Every carrier on SEA to DTW combined arrived on time 84.7% of the time across 2,072 flights, so DL 1706 is 5 points behind it. Delta flew 1,532 flights on the same city pair under all its flight numbers, including this one, and those ran 85.3% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 2 points.

DL 1706 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1706thin sample	302	80.0%	52 min	0.66%	B+
All Delta Air Lines on SEA–DTW	1,532	85.3%	65 min	1.04%	A
All carriers on SEA–DTW	2,072	84.7%	59 min	0.82%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1706 quarter by quarter

Quarter by quarter DL 1706 held fairly steady: 73.9% in Jul–Sep 2025, 81.1% in Oct–Dec 2025 and 80.2% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights73.9%
Oct–Dec 202591 flights81.1%
Jan–Mar 202628 flights—
Apr–Jun 202691 flights80.2%

Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1706 did best on Thursday at 92.9% on time and worst on Friday at 72.1%. Each day rests on about 43 flights, so a gap of 21 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1706 runs late

One category carries most of the weight here. Carrier accounts for 50% of the 3,108 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
50%
Late-arriving aircraft
23%
National Airspace System
23%
Extreme weather
4%

The largest share of delay minutes, 50%, 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 1,551 of the 3,108 delay minutes reported here. The split is drawn from 3,108 delay minutes reported on DL 1706.

Cancellations are rare at 0.66%, 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 4.7% 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.

At 1,927 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 two other city pairs in the data, including MIA to JFK (36) and ATL to VPS (13), but none flew often enough under DL 1706 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to DTW only.

One caution: this is a thin sample. 302 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 1706

For a booking, read DL 1706 as 80.0% on time with 0.66% cancelled over 302 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