Flight profile · Delta Air Lines
DL2117
Detroit (DTW) to Salt Lake City (SLC) · scheduled 8:20 PM – 10:15 PM
How DL2117 performs
765 operations, June 2024 – July 2026.
DL2117 arrived on time 69.2% of the time, against 83.6% for all DTW → SLC flights, so this departure is 14.4 percentage points worse than the route as a whole. Against Delta Air Lines’ own flights on this route it is 14.3 points worse.
Source: US DOT Bureau of Transportation Statistics · 765 operations, June 2024 – July 2026 · If DL2117 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
What stands out
How DL2117 compares to other flight numbers, not just to itself.
This flight runs unusually far behind the carrier's own average on this route, worse than 94% of 11,589 comparable flight numbers.
69.2% on time for this specific departure, against 83.5% for the same carrier's other flights on this route.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026 · The one thing about this specific departure that ranks most extreme against every other published flight number, out of everything FlyerIntel checks — shown only when something clears a real statistical bar, not for every flight.
Where DL2117 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 |
|---|---|---|---|---|---|
| DL2117 | 69.2% | 0.00% | 0 min | 10.1% | 765 |
| Delta Air Lines on DTW → SLC | 83.5% | 0.25% | -6 min | 4.8% | 4,737 |
| All DTW → SLC flights | 83.6% | 0.25% | -6 min | 4.7% | 4,773 |
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
Why DL2117 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for DL2117 on DTW → SLC. 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 DL2117 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, DL2117 pushed back an average of 41 minutes late; when it came in on time or early, an average of 10 minutes late.
Each departure is matched to the flight the same aircraft flew into DTW just before it, using the tail number in the DOT file, 651 of 765 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 |
|---|---|---|---|
| DL2117 | 20% | 69% | 19% |
| Network, same turn | 17% | 68% | 9% |
The schedule leaves a normal turn: enough time to clean and board if the aircraft is on time, little to spare if it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often DL2117’s aircraft landed 15 or more minutes late is about the same as the network’s and, once the aircraft was late, how often DL2117 left 15 or more minutes late is about the same as 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 DTW late, does that still matter by the time it reaches SLC?
DL2117 pushes back an average of 20.3 minutes late and reaches the gate at SLC an average of 13.8 minutes late. The 6.5 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. Its 18.2 minutes on the taxiways at DTW is about what any departure from the airport in that hour spends.
On arrival at SLC, DL2117 spends 6.8 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 SLC 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 SLC. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 26,230 departures from DTW scheduled in the clock hour DL2117 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at SLC (355,118 flights), not just DL2117’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
The hour it leaves DTW
Part of any flight’s record belongs to the clock rather than to the flight. DL2117 has one departure time, so this is what that time is worth.
On-time arrival rate. 26,230 departures from DTW are scheduled in the 8 PM–9 PM hour over the period, against 388,632 across the whole day.
DL2117 is scheduled out of DTW at 8:20 PM, in the 8 PM–9 PM bank. Departures from DTW in that hour arrive on time 72.8% of the time against 79.6% across the airport’s whole day — the slot alone is worth 6.8 points worse before anything about this particular flight is considered.
The two airport figures cover every departure from DTW 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 DL2117 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 |
|---|---|---|---|
| OAK→SLC Oakland to Salt Lake City | July 2–7, 2024 | 6 | — |
| SLC→OAK Salt Lake City to Oakland | July 2–7, 2024 | 6 | — |
| DAL→ATL Dallas to Atlanta | May 7, 2024 – June 6, 2024 | 26 | — |
| ATL→CHA Atlanta to Chattanooga | May 11, 2024 – June 1, 2024 | 5 | — |
| CHA→ATL Chattanooga to Atlanta | May 11, 2024 – June 1, 2024 | 5 | — |
| SAN→SEA San Diego to Seattle | April 9, 2024 – May 6, 2024 | 28 | — |
| SRQ→LGA Sarasota/Bradenton to New York | March 10, 2024 – April 8, 2024 | 26 | — |
| GEG→MSP Spokane to Minneapolis | January 9, 2024 – March 9, 2024 | 49 | — |
| ATL→JFK Atlanta to New York | February 15, 2024 | 1 | — |
| ORD→DTW Chicago to Detroit | January 8, 2024 | 1 | — |
| ATL→OMA Atlanta to Omaha | July 1, 2023 – January 7, 2024 | 14 | — |
| MIA→LGA Miami to New York | November 5, 2023 – December 6, 2023 | 27 | — |
| BOS→ORD Boston to Chicago | November 11, 2023 – December 2, 2023 | 4 | — |
| GNV→ATL Gainesville to Atlanta | November 24, 2023 | 1 | — |
| DTW→CLT Detroit to Charlotte | October 9, 2023 – November 4, 2023 | 27 | — |
| JFK→MSP New York to Minneapolis | September 5, 2023 – October 8, 2023 | 34 | — |
Because the same number has served different journeys, the statistics above describe only the route DL2117 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.
60 min late
against a median of 0 min early
Percentiles over 765 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 |
|---|---|---|---|---|
| DL698 | Delta Air Lines | 93.2% | 10 min early | 1,062 |
| DL935 | Delta Air Lines | 88.6% | 8 min early | 1,064 |
| DL765 | Delta Air Lines | 78.3% | 3 min early | 960 |
| DL2117 this flight | Delta Air Lines | 69.2% | 0 min early | 765 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. DL2117 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 765 records of DL2117 operating DTW → SLC, 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