Flight profile · Delta Air Lines
DL2105
Kansas City (MCI) to Seattle (SEA) · scheduled 7:55 AM – 8:55 AM
How DL2105 performs
783 operations, June 2024 – July 2026.
DL2105 arrived on time 88.5% of the time, against 84.5% for all MCI → SEA flights, so this departure is 4.0 percentage points better than the route as a whole.
Source: US DOT Bureau of Transportation Statistics · 783 operations, June 2024 – July 2026 · If DL2105 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where DL2105 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| DL2105 | 88.5% | 1.66% | -12 min | 4.7% | 783 |
| Delta Air Lines on MCI → SEA | 89.0% | 1.34% | -12 min | 4.4% | 1,122 |
| All MCI → SEA flights | 84.5% | 1.06% | -8 min | 3.9% | 3,584 |
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
Why DL2105 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
the inbound aircraft was late, so this flight started late
Share of the delay minutes US DOT attributed to each cause for DL2105 on MCI → SEA. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies DL2105 comes in late, and what that does to the departure.
DL2105 is usually the aircraft’s first flight of the day: the schedule gives it a median of 8.5 hours on the ground at MCI, so its “inbound” is mostly the aircraft’s arrival the evening before.
When the aircraft came in 15 or more minutes late, DL2105 pushed back an average of 5 minutes late; when it came in on time or early, an average of 2 minutes late.
Each departure is matched to the flight the same aircraft flew into MCI just before it, using the tail number in the DOT file, 706 of 771 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| DL2105 | 22% | 7% | 8% |
| Network, same turn | 29% | 12% | 9% |
A night on the ground absorbs most of a late arrival, so a late inbound matters far less on a turn this long than on a same-day one.
The network row is every flight with a scheduled turn of 6 hours or more, usually overnight. How often DL2105’s aircraft landed 15 or more minutes late is lower than the network’s and, once the aircraft was late, how often DL2105 left 15 or more minutes late is lower than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
From pushback to gate
When it leaves MCI late, does that still matter by the time it reaches SEA?
DL2105 pushes back an average of 5.2 minutes late and reaches the gate at SEA an average of 1.6 minutes early. The 6.8 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. It spends 17.1 minutes on the taxiways at MCI, 1.5 minutes longer than a typical MCI departure in the same hour.
On arrival at SEA, DL2105 spends 12.3 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is about what any arrival at SEA spends on the ground before reaching the gate.
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached SEA. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 10,728 departures from MCI scheduled in the clock hour DL2105 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at SEA (510,187 flights), not just DL2105’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
The hour it leaves MCI
Part of any flight’s record belongs to the clock rather than to the flight. DL2105 has one departure time, so this is what that time is worth.
On-time arrival rate. 10,728 departures from MCI are scheduled in the 7 AM–8 AM hour over the period, against 152,682 across the whole day.
DL2105 is scheduled out of MCI at 7:55 AM, in the 7 AM–8 AM bank. Departures from MCI in that hour arrive on time 89.4% of the time against 81.0% across the airport’s whole day — the slot alone is worth 8.4 points better before anything about this particular flight is considered.
The two airport figures cover every departure from MCI to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes DL2105 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| PHX→MSP Phoenix to Minneapolis | November 29, 2024 | 1 | — |
| ATL→ILM Atlanta to Wilmington | May 9, 2024 – June 6, 2024 | 17 | — |
| ILM→ATL Wilmington to Atlanta | May 9, 2024 – June 6, 2024 | 17 | — |
| DTW→GRR Detroit to Grand Rapids | July 1, 2023 – May 6, 2024 | 222 | 74.9% |
| LAS→SEA Las Vegas to Seattle | March 10, 2024 – April 8, 2024 | 26 | — |
| ATL→SAV Atlanta to Savannah | February 15, 2024 – March 9, 2024 | 24 | — |
| SAV→ATL Savannah to Atlanta | February 15, 2024 – March 9, 2024 | 24 | — |
Because the same number has served different journeys, the statistics above describe only the route DL2105 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
19 min late
against a median of 12 min early
Percentiles over 783 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| AS563 | Alaska Airlines | 91.6% | 10 min early | 886 |
| DL2105 this flight | Delta Air Lines | 88.5% | 12 min early | 783 |
| AS291 | Alaska Airlines | 82.6% | 5 min early | 605 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. DL2105 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 783 records of DL2105 operating MCI → SEA, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
Analysis last recomputed