Carrier route record
ASANC→DEN
Alaska Airlines · Anchorage to Denver
- Flights
- 128
- Period
- September 2025 to August 2026
- Share of route
- 15%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Alaska Airlines.
Alaska on ANC to DEN 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 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 30 minutes. That rests on 128 flights, with a median arrival 10 minutes early.
Set against the rest of the country, Alaska's ANC to DEN record is 13 points better than the US average of 77.3%. That gap is worth roughly 125 fewer late arrivals for every thousand flights.
Key figures
On time
89.8%
Arrivals under 15 minutes late, of 128 completed flights
Avg delay
30 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
Whole route
81.5%
Every carrier on ANC to DEN, 852 flights
These figures cover 128 flights between September 2025 and August 2026. The median arrival is 10 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
Alaska against every carrier on ANC to DEN
Alaska flew 128 of the 852 flights on ANC to DEN, about 15% of it. Its 89.8% on time is 8 points better than the route as a whole, which runs 81.5%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Alaska at 89.8% to Southwest at 55.0%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
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 |
|---|---|---|---|---|---|
| Alaska Airlines (this page)thin sample | 128 | 89.8% | 30 min | 0.00% | A+ |
| United Airlines | 615 | 84.4% | 74 min | 1.30% | B |
| Southwest Airlinesthin sample | 109 | 55.0% | 64 min | 0.00% | D+ |
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Departure window
When Alaska runs best on this route
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 128 flights.
There are not enough flights in each departure window to split Alaska's ANC to DEN record by time of day without the percentages moving on noise. The headline rate of 89.8% is the reliable figure here.
Across the year
Alaska on ANC to DEN through the year
- Jul–Sep 20256 flights—
- Apr–Jun 202653 flights88.7%
- Jul–Sep 202669 flights89.9%
Scale runs 80% to 95%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 89.8% on time across 128 flights.
Split by quarter, Alaska on ANC to DEN logged 6 flights in Jul–Sep 2025, 53 flights in Apr–Jun 2026 and 69 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 89.8% annual figure is the one to use.
Arrival by arrival
How late Alaska on ANC to DEN runs when it is late
Alaska on ANC to DEN often beats the schedule: 46 of 128 completed flights, 36%, arrived 15 minutes or more early. Most of the lateness is short. 8 of the 13 late arrivals were under half an hour behind, and 1 reached an hour or more. Not one arrived two hours late.
- 15+ min early46 flights35.9%
- Within 15 min69 flights53.9%
- 15–29 min late8 flights6.3%
- 30–59 min late4 flights3.1%
- 1–2 hours late1 flights0.8%
- 2+ hours late0 flights0.0%
Scale runs 0% to 100%.
Share of 128 completed flights by arrival against schedule.
Only 16 of 128 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for Alaska on ANC to DEN
The latest arrival of the period was on 22 June 2026, 1 hour 14 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in June 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 22 June 2026 | 1 hour 14 minutes | Carrier |
| 13 August 2026 | 50 minutes | Carrier |
| 23 June 2026 | 35 minutes | Carrier |
| 1 August 2026 | 34 minutes | National Airspace System |
| 19 June 2026 | 33 minutes | National Airspace System |
Delay causes
Why Alaska runs late on this route
Carrier accounts for 60% of the 387 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Carrier
- 35%National Airspace System
- 5%Late-arriving aircraft
The largest share of delay minutes, 60%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 231 of the 387 delay minutes reported here. The split is drawn from 387 reported delay minutes.
35% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 137 minutes out of 387, against a national NAS share of 21%.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 0.8% 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.
At 2,405 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg runs 88.0% on time across 128 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. 128 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.
What to do with this
Booking Alaska on ANC to DEN
Put together: treat all of this as provisional. 128 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 89.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 128 completed flights over 12 months sit behind that.
Related
Where to go next
- ANC to DEN, every carrier
- Alaska on DEN to ANC, the return leg
- United Airlines on ANC to DEN84.4%
- Southwest Airlines on ANC to DEN55.0%
- Alaska Airlines network-wide record
- Denver International (DEN) delay statistics
- How to read this site: grades, sample sizes, and honest caveats
- Late aircraft, weather, or the airline: what actually causes US flight delays
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.