Flight number record

DL 2105

Delta Air Lines · Kansas City to Seattle

Route: MCI → SEA
Departs: 07:55
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2105, check with Delta Air Lines.

DL 2105 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 8 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 364 flights, with a median arrival 10 minutes early.

Set against the rest of the country, DL 2105's record is 8 points better than the US average of 77.6%. That gap is worth roughly 77 fewer late arrivals for every thousand flights.

On time

85.3%

Arrivals under 15 minutes late, of 354 completed flights

Avg delay

84 min

Across delayed arrivals only, not all flights

Cancelled

1.65%

National rate is 1.81%

1 hour+ late

4.5%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 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.

Schedule

When DL 2105 flies

DL 2105 flies MCI to SEA without a single fixed slot. Its most common scheduled departure was 07:55, used on 155 of 364 flights, with 07:00 (86 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:55155 flights42.6%
Departs 07:0086 flights23.6%

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 07:55 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 2105 runs 4 points worse at 85.3%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 2105 next to MCI to SEA

Every carrier on MCI to SEA combined arrived on time 83.4% of the time across 1,131 flights, so DL 2105 is 2 points ahead of it. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 4 points.

DL 2105 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2105thin sample	364	85.3%	84 min	1.65%	A
All Delta Air Lines on MCI–SEAthin sample	364	85.3%	84 min	1.65%	A
All carriers on MCI–SEA	1,131	83.4%	71 min	1.06%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2105 quarter by quarter

Quarter by quarter DL 2105 held fairly steady: 89.0% in Jul–Sep 2025, 82.0% in Oct–Dec 2025, 81.4% in Jan–Mar 2026 and 88.6% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights89.0%
Oct–Dec 202591 flights82.0%
Jan–Mar 202690 flights81.4%
Apr–Jun 202691 flights88.6%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2105 ranged from 78.0% on Friday to 88.5% on Tuesday. With about 52 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 2105 runs late

One category carries most of the weight here. Carrier accounts for 77% of the 4,344 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
77%
National Airspace System
18%
Late-arriving aircraft
4%
Extreme weather
1%

The largest share of delay minutes, 77%, 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 3,349 of the 4,344 delay minutes reported here. The split is drawn from 4,344 delay minutes reported on DL 2105.

Cancellations sit at 1.65% against a national 1.81%, which is ordinary. Diversions add another 1.10%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.5% 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.

The 1,490 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

Every one of the 364 flights under DL 2105 in the data flew MCI 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. 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 2105

For a booking, read DL 2105 as 85.3% 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