Flight profile · Delta Air Lines
DL432
Washington (IAD) to Salt Lake City (SLC) · scheduled 7:05 AM – 9:48 AM
How DL432 performs
814 operations, March 2024 – July 2026.
DL432 arrived on time 87.2% of the time, against 84.4% for all IAD → SLC flights, so this departure is 2.8 percentage points better than the route as a whole.
Source: US DOT Bureau of Transportation Statistics · 814 operations, March 2024 – July 2026 · If DL432 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where DL432 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 |
|---|---|---|---|---|---|
| DL432 | 87.2% | 0.98% | -8 min | 4.6% | 814 |
| Delta Air Lines on IAD → SLC | 87.5% | 0.89% | -9 min | 4.7% | 1,127 |
| All IAD → SLC flights | 84.4% | 0.94% | -8 min | 5.9% | 1,702 |
Source: FlyerIntel analysis of US DOT BTS data · March 2024 – July 2026
Why DL432 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
Share of the delay minutes US DOT attributed to each cause for DL432 on IAD → SLC. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering March 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies DL432 comes in late, and what that does to the departure.
DL432 is usually the aircraft’s first flight of the day: the schedule gives it a median of 7.7 hours on the ground at IAD, so its “inbound” is mostly the aircraft’s arrival the evening before.
When the aircraft came in 15 or more minutes late, DL432 pushed back an average of 9 minutes late; when it came in on time or early, an average of 6 minutes late.
Each departure is matched to the flight the same aircraft flew into IAD just before it, using the tail number in the DOT file, 798 of 807 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 |
|---|---|---|---|
| DL432 | 20% | 13% | 9% |
| 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 DL432’s aircraft landed 15 or more minutes late is lower than the network’s and, once the aircraft was late, how often DL432 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 March 2024 – July 2026
From pushback to gate
When it leaves IAD late, does that still matter by the time it reaches SLC?
DL432 pushes back an average of 8.4 minutes late and reaches the gate at SLC an average of 1.7 minutes late. The 6.7 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 14.1 minutes on the taxiways at IAD, 2.1 minutes shorter than a typical IAD departure in the same hour.
On arrival at SLC, DL432 spends 8.5 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 1.4 minutes longer than a typical SLC arrival (7.1 min).
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 5,266 departures from IAD scheduled in the clock hour DL432 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 DL432’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · March 2024 – July 2026
The hour it leaves IAD
Part of any flight’s record belongs to the clock rather than to the flight. DL432 has one departure time, so this is what that time is worth.
On-time arrival rate. 5,266 departures from IAD are scheduled in the 7 AM–8 AM hour over the period, against 170,208 across the whole day.
DL432 is scheduled out of IAD at 7:05 AM, in the 7 AM–8 AM bank. Departures from IAD in that hour arrive on time 84.6% of the time against 81.0% across the airport’s whole day — the slot alone is worth 3.7 points better before anything about this particular flight is considered.
The two airport figures cover every departure from IAD 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 · March 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes DL432 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 |
|---|---|---|---|
| SFO→ATL San Francisco to Atlanta | May 9, 2024 – June 6, 2024 | 16 | — |
| SLC→IAH Salt Lake City to Houston | May 11, 2024 – June 1, 2024 | 5 | — |
| JFK→LAX New York to Los Angeles | April 9, 2024 – May 6, 2024 | 28 | — |
| DAB→LGA Daytona Beach to New York | February 16–19, 2024 | 2 | — |
| LGA→DAB New York to Daytona Beach | February 16–19, 2024 | 2 | — |
| ORD→DTW Chicago to Detroit | January 8, 2024 – February 14, 2024 | 18 | — |
| LAS→JFK Las Vegas to New York | December 16, 2023 – January 7, 2024 | 9 | — |
| CVG→ATL Cincinnati / Covington to Atlanta | July 9, 2023 – December 15, 2023 | 159 | 94.2% |
| ATL→CVG Atlanta to Cincinnati / Covington | July 9, 2023 – December 15, 2023 | 133 | 92.4% |
| ATL→PNS Atlanta to Pensacola | July 2–7, 2023 | 5 | — |
Because the same number has served different journeys, the statistics above describe only the route DL432 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.
18 min late
against a median of 8 min early
Percentiles over 814 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering March 2024 – July 2026
Data and methodology
Calculated by FlyerIntel from 814 records of DL432 operating IAD → 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
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