Flight number record
DL 1090
Delta Air Lines · Tampa to Seattle
- Route
- TPA → SEA
- Departs
- 07:16
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1090, check with Delta Air Lines.
DL 1090 earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 40 minutes. That rests on 363 flights, with a median arrival 6 minutes early.
Set against the rest of the country, DL 1090's record is 7 points better than the US average of 77.3%. That gap is worth roughly 70 fewer late arrivals for every thousand flights.
Key figures
On time
84.3%
Arrivals under 15 minutes late, of 357 completed flights
Avg delay
41 min
Across delayed arrivals only, not all flights
Cancelled
0.83%
National rate is 1.89%
1 hour+ late
2.8%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. The median arrival is 6 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.
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Schedule
When DL 1090 flies
DL 1090 flies TPA to SEA without a single fixed slot. Its most common scheduled departure was 07:16, used on 56 of 363 flights, with 08:10 (40 flights) next.
- Departs 07:1656 flights15.4%
- Departs 08:1040 flights11.0%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 07:16 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1090 runs 5 points worse at 84.3%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 1090 next to TPA to SEA
Every carrier on TPA to SEA combined arrived on time 74.2% of the time across 975 flights, so DL 1090 is 10 points ahead of it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1090thin sample | 363 | 84.3% | 41 min | 0.83% | B+ |
| All Delta Air Lines on TPA–SEAthin sample | 363 | 84.3% | 41 min | 0.83% | B+ |
| All carriers on TPA–SEA | 975 | 74.2% | 49 min | 0.92% | C+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1090 quarter by quarter
DL 1090 did not run the same all year. Its best quarter was Oct–Dec 2025 at 90.9% on time and its weakest Jul–Sep 2026 at 70.0%, a swing of 21 points on roughly 73 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 202530 flights90.0%
- Oct–Dec 202590 flights90.9%
- Jan–Mar 202690 flights79.5%
- Apr–Jun 202691 flights90.1%
- Jul–Sep 202662 flights70.0%
Scale runs 60% to 95%.
By weekday, DL 1090 did best on Sunday at 90.0% on time and worst on Monday at 75.5%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1090 runs when it is late
DL 1090 often beats the schedule: 108 of 357 completed flights, 30%, arrived 15 minutes or more early. Most of the lateness is short. 34 of the 56 late arrivals were under half an hour behind, and 10 reached an hour or more.
- 15+ min early108 flights30.3%
- Within 15 min193 flights54.1%
- 15–29 min late34 flights9.5%
- 30–59 min late12 flights3.4%
- 1–2 hours late5 flights1.4%
- 2+ hours late5 flights1.4%
Scale runs 0% to 100%.
Share of 357 completed flights by arrival against schedule.
A late pushback is often recovered here: of 30 departures that left 15 minutes late or more, 9 still arrived on time. In the other direction, 35 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SEA.
The worst days
Worst days for DL 1090
The latest arrival of the period was on 5 January 2026, 2 hours 48 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in January 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 5 January 2026 | 2 hours 48 minutes | Carrier |
| 29 January 2026 | 2 hours 15 minutes | Carrier |
| 6 September 2025 | 2 hours 5 minutes | Late-arriving aircraft |
| 22 January 2026 | 2 hours 5 minutes | Carrier |
| 30 September 2025 | 2 hours 4 minutes | Carrier |
Delay causes
Why DL 1090 runs late
National Airspace System accounts for 44% of the 2,305 delay minutes carriers reported here, and the remaining four split what is left.
- 44%National Airspace System
- 42%Carrier
- 14%Late-arriving aircraft
The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 972 of the 2,305 delay minutes reported here. The split is drawn from 2,305 delay minutes reported on DL 1090.
Cancellations are rare at 0.83%, below the national 1.89% 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 2.8% land an hour or more behind schedule, against 8.3% 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 2,520 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.
Every one of the 363 flights under DL 1090 in the data flew TPA to SEA. 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. 363 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 1090
For a booking, read DL 1090 as 84.3% on time with 0.83% cancelled over 363 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- TPA to SEA, every carrier and departure
- SEA to TPA, the return direction
- Alaska Airlines 640 on the same route73.3%
- Alaska Airlines 326 on the same route61.0%
- Tampa International (TPA) delay statistics
- Seattle-Tacoma International (SEA) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.