ON TIMEBOARD
SLC Salt Lake City / RDU Raleigh

SLC → RDU on time

Salt Lake City (Salt Lake City, UT) to Raleigh-Durham (Raleigh/Durham, NC). Every scheduled flight, September 2025 to August 2026.

On time
84%
arrived < 15 min late
Cancelled
1.3%
373 flights
Typical arrival
−10 min
median vs schedule
When late
+55 min
average delay
Flights / day
1
1 airline

84% of flights from Salt Lake City to Raleigh arrived on time over the past 12 months. That is better than the typical U.S. route. 6% of flights arrived more than an hour late or not at all.

How late?

The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for SLC → RDU: when a flight was late, it was under 45 minutes late 66% of the time. About 1 in 23 flights landed an hour or more late, and 1 in 124 three hours or more; 1.3% were cancelled outright.

Share of all 373 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
Delta Air Lines37384%1.3%−10 min4.3%+55 minDelta Air Lines

Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.

Best time of day to fly

On-time rate by scheduled departure hour (local time at SLC). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%10 a.m. departures: too few flights (40 flights)10a11 a.m. departures: too few flights (77 flights)11anoon departures: too few flights12p1 p.m. departures: too few flights1p2 p.m. departures: too few flights2p3 p.m. departures: too few flights3p4 p.m. departures: too few flights4p5 p.m. departures: 81% on time (239 flights)815p
SLC → RDU, share of flights arriving on time, by departure hour. Hours with under 100 flights are greyed out.
82%+ on time76–82%68–76%under 68%too few flights

By month

Each calendar month pooled over 2023–2026. Best: December (87%). Worst: July (70%).

40%70%100%Jan: too few flights (95 flights)JanFeb: too few flights (85 flights)FebMar: too few flights (93 flights)MarApr: too few flights (90 flights)AprMay: too few flights (93 flights)MayJun: 75% on time (134 flights)75JunJul: 70% on time (148 flights)70JulAug: 80% on time (112 flights)80AugSep: too few flights (90 flights)SepOct: too few flights (92 flights)OctNov: too few flights (89 flights)NovDec: 87% on time (100 flights)87Dec

By day of week

DayFlightsOn timeCancelled
Monday55——
Tuesday54——
Wednesday52——
Thursday52——
Friday53——
Saturday52——
Sunday55——

Why flights were late

Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.

Airline (crew, maintenance, ops) 47%Late inbound plane 29%Air traffic & airport (NAS) 21%Severe weather 3%

Cancellations: weather 3 · airline 2

Month by month

Not enough months with data to draw a trend.

Flight numbers on this route

Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.

FlightDepartsFlightsOn timeCancelledTypical arrivalOperated by
DL 14095:50 p.m.25282%2.0%−8 minDelta Air Lines

Questions

How often are flights from SLC to RDU on time?

84% of 373 scheduled flights from Salt Lake City, UT to Raleigh/Durham, NC arrived within 15 minutes of schedule between September 2025 and August 2026. 1.3% were cancelled.

What month has the most delays from SLC to RDU?

July (70% on time). The best month is December (87%), over 2023–2026.

Related

Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.