Route reliability record
DEN→RDM
Denver to Redmond
- Flights
- 727
- Period
- September 2025 to August 2026
- Distance
- 898 mi
- Carriers
- 1
This route sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.3%. The late ones land about 55 minutes behind schedule. That rests on 727 DEN to RDM flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so this route runs 7 points behind the country as a whole. Across a thousand flights that is about 66 extra late arrivals.
Key figures
On time
70.7%
Arrivals under 15 minutes late, of 720 completed flights
Avg delay
54 min
Across delayed arrivals only, not all flights
Cancelled
0.28%
National rate is 1.89%
Best carrier
United
70.7% on time across 727 flights
These figures cover 727 flights between September 2025 and August 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.
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Carrier by carrier
Which airline is most reliable on DEN to RDM
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 |
|---|---|---|---|---|---|
| United Airlines | 727 | 70.7% | 54 min | 0.28% | C+ |
Flight by flight
Flights on DEN to RDM
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 727 flights.
- 5am–8am—
- 8am–11am—
- 11am–2pm364 flights69.2%
- 2pm–5pm—
- 5pm–8pm363 flights72.2%
- 8pm–5am—
Scale runs 60% to 80%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is the strongest at 72.2% on time. The full set of windows spans 3 points.
Explore
Filter DEN to RDM 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 DEN to RDM, the best departure window is 5pm–8pm at 72.2% on time and the worst is 11am–2pm at 69.2%, a narrow gap of 3.0 points. All US flights leaving 5pm–8pm ran 68.0%.
- 5–8am—
- 8–11am—
- 11am–2pm69.2%
- 2–5pm—
- 5–8pm72.2%
- 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 45 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.
June is the worst month at 41.7% on time, 45 points below April, the best at 86.7%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. January was the busiest month here, with 62 flights.
Across the week, Monday is the strongest day at 76.2% on time and Sunday the weakest at 65.3%, a spread of 11 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 50% of the 11,000 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Late-arriving aircraft
- 27%Carrier
- 22%National Airspace System
50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 11,000 reported delay minutes here, that single category outweighs weather by 50 to one. The split is drawn from 11,410 reported delay minutes.
Cancellations are rare at 0.28%, 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
7.4% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 55 minutes, which a normal layover absorbs.
The 898 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 is a different operation and performs like one: it runs 85.0% on time across 727 flights, 14 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 14 points of difference.
One caution: this is a thin sample. 727 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 RDM after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 727 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 70.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 720 completed flights over 12 months sit behind that.
Common questions
DEN to RDM questions
How often is DEN to RDM delayed?
Roughly one flight in three arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 29.3% of the 727 flights in this analysis, against 22.7% nationally. Delayed flights are late by about 55 minutes on average.
How reliable is DEN to RDM compared with the rest of the country?
70.7% of flights arrive on time here against a national 77.3%, a difference of 7 points against it. That is worth a C+ on this site's grading scale.
What time of day has the fewest delays on DEN to RDM?
The 5pm–8pm departure window is the strongest at 72.2% on time. The 11am–2pm window is the weakest at 69.2%, 3 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 June delays on DEN to RDM?
June is the weakest month at 41.7% on time, compared with 86.7% in April. Across the year that is 45 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
- RDM to DEN — the return legseparate record
- Denver International (DEN) delay statistics
- DEN to PHX, a related route75.6%
- SEA to RDM, a related route84.9%
- DEN to SLC, a related route78.2%
- United Airlines on-time record70.7%
- Why the first flight of the morning is statistically safest
- Worst months to fly in the US, ranked by the data
Direction matters. DEN to RDM and RDM to DEN 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.