Flight number record

DL 347

Delta Air Lines · Orlando to Seattle

Route: MCO → SEA
Departs: 09:00
Flights: 365
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s DL 347, check with Delta Air Lines.

DL 347 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 50 minutes. That rests on 365 flights, with a median arrival 10 minutes early.

Set against the rest of the country, DL 347's record is 9 points better than the US average of 77.3%. That gap is worth roughly 88 fewer late arrivals for every thousand flights.

On time

86.1%

Arrivals under 15 minutes late, of 360 completed flights

Avg delay

51 min

Across delayed arrivals only, not all flights

Cancelled

0.55%

National rate is 1.89%

1 hour+ late

2.2%

National rate is 8.3%

These figures cover 365 flights between September 2025 and August 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.

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Schedule

When DL 347 flies

DL 347 flies MCO to SEA without a single fixed slot. Its most common scheduled departure was 09:00, used on 102 of 365 flights, with 09:05 (87 flights) and 08:50 (60 flights) next.

Departs 09:00102 flights27.9%
Departs 09:0587 flights23.8%
Departs 08:5060 flights16.4%

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 09:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 347 runs 2 points better at 86.1%. 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 347 next to MCO to SEA

Every carrier on MCO to SEA combined arrived on time 77.5% of the time across 1,820 flights, so DL 347 is 9 points ahead of it. Delta flew 719 flights on the same city pair under all its flight numbers, including this one, and those ran 76.7% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 5 points.

DL 347 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 347	365	86.1%	51 min	0.55%	A+
All Delta Air Lines on MCO–SEA	719	76.7%	61 min	1.39%	B
All carriers on MCO–SEA	1,820	77.5%	58 min	1.04%	B
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 347 quarter by quarter

DL 347 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Jan–Mar 2026 at 75.6%, 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 flights100.0%
Oct–Dec 202592 flights82.6%
Jan–Mar 202690 flights75.6%
Apr–Jun 202691 flights93.4%
Jul–Sep 202662 flights88.5%

Scale runs 65% to 100%.

By weekday, DL 347 ranged from 82.4% on Thursday to 94.1% on Sunday. 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 347 runs when it is late

DL 347 often beats the schedule: 131 of 360 completed flights, 36%, arrived 15 minutes or more early. The 50 late arrivals split 23 under half an hour, 19 between 30 and 60 minutes, and 8 an hour or more.

15+ min early131 flights36.4%
Within 15 min179 flights49.7%
15–29 min late23 flights6.4%
30–59 min late19 flights5.3%
1–2 hours late6 flights1.7%
2+ hours late2 flights0.6%

Scale runs 0% to 100%.

Share of 360 completed flights by arrival against schedule.

11 of 38 late departures made up the time and arrived on time, 29% of them. In the other direction, 23 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 347

The latest arrival of the period was on 17 February 2026, 8 hours 49 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).

The latest arrivals of DL 347 in the period
Date	Arrived late by	Largest filed cause
17 February 2026	8 hours 49 minutes	Late-arriving aircraft
14 March 2026	3 hours 3 minutes	Carrier
26 May 2026	1 hour 49 minutes	Carrier
9 December 2025	1 hour 44 minutes	Carrier
28 August 2026	1 hour 39 minutes	National Airspace System

Delay causes

Why DL 347 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 2,547 reported delay minutes.

Late-arriving aircraft
38%
Carrier
30%
National Airspace System
29%
Extreme weather
4%

38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,547 reported delay minutes here, that single category outweighs weather by 10 to one. The split is drawn from 2,547 delay minutes reported on DL 347.

Cancellations are rare at 0.55%, 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 2.2% 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 2,554 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 347 in the data flew MCO 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. 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 347

For a booking, DL 347 has one of the better records a US domestic flight can show: 86.1% on time and 0.55% 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures