Route reliability record
RDM→SLC
Redmond to Salt Lake City
- Flights
- 729
- Period
- September 2025 to August 2026
- Distance
- 525 mi
- Carriers
- 1
This route earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 729 RDM to SLC flights, with a median arrival 11 minutes early.
Set against the rest of the country, this route's record is 14 points better than the US average of 77.3%. That gap is worth roughly 137 fewer late arrivals for every thousand flights.
Key figures
On time
91.0%
Arrivals under 15 minutes late, of 722 completed flights
Avg delay
113 min
Across delayed arrivals only, not all flights
Cancelled
0.82%
National rate is 1.89%
Best carrier
SkyWest
91.0% on time across 729 flights
These figures cover 729 flights between September 2025 and August 2026. The median arrival is 11 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
Which airline is most reliable on RDM to SLC
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines | 729 | 91.0% | 113 min | 0.82% | A+ |
Flight by flight
Flights on RDM to SLC
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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Departure window
The best time of day to leave
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 729 flights.
- 5am–8am365 flights89.8%
- 8am–11am—
- 11am–2pm363 flights92.2%
- 2pm–5pm1 flights—
- 5pm–8pm—
- 8pm–5am—
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
The 11am–2pm window is the strongest at 92.2% on time. The full set of windows spans 2 points.
Explore
Filter RDM to SLC by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On RDM to SLC, the best departure window is 11am–2pm at 92.2% on time and the worst is 5am–8am at 89.8%, a narrow gap of 2.4 points. All US flights leaving 11am–2pm ran 78.3%.
- 5–8am89.8%
- 8–11am—
- 11am–2pm92.2%
- 2–5pm—
- 5–8pm—
- 8pm–5am—
best all US flightsScale 60% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 16 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
February is the weak month at 80.8% on time, against 96.8% in October. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. January was the busiest month here, with 62 flights.
Across the week, Thursday is the strongest day at 94.1% on time and Wednesday the weakest at 89.3%, a spread of 5 points.
Delay causes
Why this route gets delayed
Carrier accounts for 66% of the 7,370 delay minutes carriers reported here, and the remaining four split what is left.
- 66%Carrier
- 31%Extreme weather
- 2%National Airspace System
- 0%Security
Extreme weather accounts for 31% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 5.2 times the usual weather exposure. The split is drawn from 7,370 reported delay minutes.
The largest share of delay minutes, 66%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 4,889 of the 7,370 delay minutes reported here.
Cancellations are rare at 0.82%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here actually costs
Badly late arrivals are rare here: only 4.6% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 525 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg runs 93.2% on time across 729 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 729 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
Work out the risk of missing a connection in SLC after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 729 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 91.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 722 completed flights over 12 months sit behind that.
Common questions
RDM to SLC questions
How often is RDM to SLC delayed?
About one flight in twelve arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 9.0% of the 729 flights in this analysis, against 22.7% nationally. Delayed flights are late by close to two hours on average.
How reliable is RDM to SLC compared with the rest of the country?
91.0% of flights arrive on time here against a national 77.3%, a difference of 14 points in its favour. That is worth a A+ on this site's grading scale.
What time of day has the fewest delays on RDM to SLC?
The 11am–2pm departure window is the strongest at 92.2% on time. The 5am–8am window is the weakest at 89.8%, 2 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are February delays on RDM to SLC?
February is the weakest month at 80.8% on time, compared with 96.8% in October. Across the year that is 16 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- SLC to RDM — the return legseparate record
- Salt Lake City International (SLC) delay statistics
- RDM to SEA, a related route85.2%
- DEN to SLC, a related route78.2%
- RDM to SFO, a related route61.8%
- SkyWest Airlines on-time record91.0%
- The most punctual routes in the US, and the least
- Worst months to fly in the US, ranked by the data
Direction matters. RDM to SLC and SLC to RDM are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.