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Route · RDU → SLC · 2020–2025 BTS data

Raleigh/Durham to Salt Lake City

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), RDU to SLC (Raleigh/Durham to Salt Lake City) ranks #4038 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

85.6%
On-time
+6.6 pts
vs US avg
69 min
Delay when late
1,661
Flights
#4038 of 4927
Corpus placement

Cancelled

0.8%

Best Month

Jun 2024 78%

Worst Month

Jul 2024 65%

Distance

1,823 mi

Carriers

1

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 38 14 0 0 DL
Nov 2025 30 7 0 0 DL
Oct 2025 30 3 0 1 DL
Sep 2025 30 5 0 0 DL
Aug 2025 41 5 1 0 DL
Jul 2025 60 14 0 0 DL
Jun 2025 53 12 1 0 DL
May 2025 31 2 0 0 DL
Apr 2025 30 3 0 0 DL
Mar 2025 31 1 0 0 DL
Jan 2025 31 5 0 0 DL
Dec 2024 31 4 0 0 DL
Nov 2024 30 4 0 0 DL
Oct 2024 31 0 0 0 DL
Sep 2024 30 3 0 1 DL
Aug 2024 40 8 0 0 DL
Jul 2024 57 20 5 0 DL
Jun 2024 51 11 0 0 DL
May 2024 31 9 0 0 DL
Apr 2024 31 1 0 0 DL
Mar 2024 31 5 0 1 DL
Jan 2024 31 7 0 0 DL
Dec 2023 31 1 0 0 DL
Oct 2023 31 2 0 0 DL

RDU–SLC seasonal on-time pattern

Best: October (95.5%) · weakest: July (77.0%)

75%80%85%90%95%100% JanMarAprMayJunJulAugSepOctNovDec 80.9%

Strongest calendar month

October

95.5% on-time · ~31 flights/mo

Busiest calendar month

July

~43 flights/mo avg

Weakest calendar month

July

77.0% on-time · ~43 flights/mo

Cancellation Rate

0.8%

7 of 861 flights

Diversion Rate

0.3%

3 of 861 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

RDU - Raleigh/Durham

Full on-time, delay-cause, and seasonal performance for Raleigh/Durham, NC.

RDU on-time profile

SLC - Salt Lake City

Full on-time, delay-cause, and seasonal performance for Salt Lake City, UT.

SLC on-time profile

Compare the two airports

See RDU and SLC side by side on delays, cancellations, and reliability.

Compare RDU vs SLC

Origin-hub reliability standing

Among RDU's stronger departures

RDU → SLC posts a 85.6% on-time rate, landing in the ≥85% band with 9 of 35 BTS-tracked routes leaving Raleigh/Durham. The same hub also shows 25 mid-band and 1 challenged departures · fleet-wide on-time rank #1039 of 4927 (highest on-time = #1).

What the Data Says About RDU to SLC

Raleigh/Durham to Salt Lake City (RDU to SLC) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.6% on-time rate across 1,661 flights, with delays that do happen averaging 69.2 minutes. The corridor runs roughly 1,823 miles and is served by 1 carrier. Over the most recent 24 months, 7 of 861 flights were cancelled (0.8%) and 3 diverted (0.3%).

Monthly performance varies moderately here: Jun 2024 was the strongest month at 78% on-time versus Jul 2024 at 65%, a 14-point difference.

On the multi-year calendar, RDU–SLC peaks in October at 95.5% on-time while July carries the heaviest traffic (~43 flights per month) ; the softest month is July at 77.0%, a 18.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does RDU to SLC rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, RDU to SLC ranks #4038 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from RDU to SLC? ▼
Flights from Raleigh/Durham to Salt Lake City have a 85.6% on-time rate based on 1,661 flights. The average delay is 69.2 minutes. The best recent month was Jun 2024 with 78% on-time.
What is the cancellation rate for RDU to SLC? ▼
Over the last 24 months, 0.8% of flights on this route were cancelled (7 of 861 flights) and 0.3% were diverted.
How far is the flight from RDU to SLC? ▼
The flight distance from Raleigh/Durham (RDU) to Salt Lake City (SLC) is approximately 1,823 miles. This route is served by 1 carrier.
When is the best time to fly from RDU to SLC? ▼
The best recent month for on-time performance was Jun 2024 (78% on-time). The worst was Jul 2024 (65% on-time). Consider booking during months with historically better performance.

Airports on this route

RDU Airport

Raleigh/Durham
SLC Airport

Salt Lake City
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using RDU–SLC data

RDU–SLC runs 6.6 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare RDU and SLC airport profiles: delay causes and top routes differ even on the same corridor. RDU airport
  • If your dates flex, October (95.5% on-time) beats July (77.0%) on this corridor. Seasonal chart
  • 4 other routes post a similar 85.6% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.