Flight number record
DL 345
Delta Air Lines · Seattle to Lihue
- Route
- SEA → LIH
- Departs
- 14:30
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 345, check with Delta Air Lines.
DL 345 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 365 flights, with a median arrival 4 minutes early.
Key figures
On time
74.7%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
1.64%
National rate is 1.89%
1 hour+ late
6.7%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 4 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 345 flies
DL 345 flies SEA to LIH without a single fixed slot. Its most common scheduled departure was 14:30, used on 95 of 365 flights, with 15:55 (86 flights) and 15:50 (45 flights) next.
- Departs 14:3095 flights26.0%
- Departs 15:5586 flights23.6%
- Departs 15:5045 flights12.3%
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 14:30 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 345 runs 3 points better at 74.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 345 next to SEA to LIH
Every carrier on SEA to LIH combined arrived on time 73.0% of the time across 1,094 flights, so DL 345 is 2 points ahead of it. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 345 | 365 | 74.7% | 69 min | 1.64% | C |
| All Delta Air Lines on SEA–LIH | 365 | 74.7% | 69 min | 1.64% | C |
| All carriers on SEA–LIH | 1,094 | 73.0% | 58 min | 0.73% | C+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 345 quarter by quarter
DL 345 did not run the same all year. Its best quarter was Apr–Jun 2026 at 87.9% on time and its weakest Jan–Mar 2026 at 64.4%, a swing of 24 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 flights83.3%
- Oct–Dec 202592 flights69.7%
- Jan–Mar 202690 flights64.4%
- Apr–Jun 202691 flights87.9%
- Jul–Sep 202662 flights72.6%
Scale runs 55% to 95%.
By weekday, DL 345 ranged from 69.2% on Tuesday to 80.8% on Saturday. With about 52 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 345 runs when it is late
DL 345 often beats the schedule: 96 of 359 completed flights, 27%, arrived 15 minutes or more early. The 91 late arrivals split 38 under half an hour, 29 between 30 and 60 minutes, and 24 an hour or more.
- 15+ min early96 flights26.7%
- Within 15 min172 flights47.9%
- 15–29 min late38 flights10.6%
- 30–59 min late29 flights8.1%
- 1–2 hours late8 flights2.2%
- 2+ hours late16 flights4.5%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
14 of 70 late departures made up the time and arrived on time, 20% of them. 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 LIH.
The worst days
Worst days for DL 345
The latest arrival of the period was on 27 December 2025, 7 hours 4 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 December 2025 | 7 hours 4 minutes | Carrier |
| 31 December 2025 | 6 hours 15 minutes | Late-arriving aircraft |
| 13 January 2026 | 5 hours 7 minutes | Carrier |
| 1 February 2026 | 4 hours 16 minutes | Carrier |
| 9 June 2026 | 4 hours 11 minutes | Carrier |
Delay causes
Why DL 345 runs late
Carrier accounts for 45% of the 6,247 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 32%Late-arriving aircraft
- 22%National Airspace System
- 1%Extreme weather
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,780 of the 6,247 delay minutes reported here. The split is drawn from 6,247 delay minutes reported on DL 345.
Cancellations sit at 1.64% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
6.7% of arrivals land an hour or more late, close to the national 8.3%, so 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.
At 2,700 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 365 flights under DL 345 in the data flew SEA to LIH. 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. 365 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 345
For a booking, read DL 345 as 74.7% on time with 1.64% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SEA to LIH, every carrier and departure
- LIH to SEA, the return direction
- Alaska Airlines 237 on the same route76.2%
- 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
- Why the first flight of the morning is statistically safest
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.