RDU to SLC flight delays
Raleigh/Durham, NC (RDU) Salt Lake City, UT (SLC) · 1,824 miles
412 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
82.76%
Arrived on time
Within 15 minutes of schedule
1.21%
Cancelled
Share of scheduled flights
66 min
When late, late by
Average across delayed arrivals
12 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In March it ran 33.5 points more punctual than in December — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The route has been getting better. The later months in the record run 8.7 points more punctual than the earlier ones, which usually means a schedule that was too tight has been given more room.
The two directions do not behave alike. SLC to RDU arrives on time 6.8 points more often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Only Delta Air Lines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
Which airline should you fly on this route?
Over January 2025 – August 2026, Delta Air Lines arrived on time most often on RDU to SLC. Flights ran closest to schedule in March and worst in December.
Every airline on RDU to SLC
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 412 | 82.76% | 1.21% | 66 min | B |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
Other routes from Raleigh/Durham
Common questions
Are flights from Raleigh/Durham to Salt Lake City usually delayed?
82.76% of flights on the RDU to SLC route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airlines fly from Raleigh/Durham to Salt Lake City?
Only Delta Air Lines appears in the published record on this route, with 412 flights and 82.76% arriving on time.
How often are RDU to SLC flights cancelled?
1.21% of scheduled flights did not operate — about 12 in every thousand. That is in the normal range.
What is the best month to fly Raleigh/Durham to Salt Lake City?
March, when 96.7% of flights arrived on time. The worst was December at 63.2%.
When RDU to SLC flights are late, how late are they?
About 66 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on RDU to SLC during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →