Route reliability record
ORD→ANC
Chicago to Anchorage
- Flights
- 786
- Period
- July 2025 to June 2026
- Distance
- 2,846 mi
- Carriers
- 3
This route sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.6%. The late ones land roughly 55 minutes behind schedule. That rests on 786 ORD to ANC flights, with a median arrival 4 minutes early.
Best time to fly ORD to ANC: a 8pm–5am departure, ideally on a Friday. Flights in that window arrived on time 81.4% of the time and Friday flights 78.4%, against 73.8% for the route overall.
The US average over the same twelve months is 77.6%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
73.8%
Arrivals under 15 minutes late, of 778 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
0.76%
National rate is 1.81%
Best carrier
United
73.7% on time across 438 flights
These figures cover 786 flights between July 2025 and June 2026. The median arrival is 4 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.
Carrier by carrier
Which airline is most reliable on ORD to ANC
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 Airlinesthin sample | 210 | 77.4% | 55 min | 0.95% | B+ |
| United Airlines | 438 | 73.7% | 49 min | 0.91% | C+ |
| American Airlinesthin sample | 138 | 68.6% | 61 min | 0.00% | C+ |
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 13 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am—
- 8am–11am266 flights80.8%
- 11am–2pm21 flights—
- 2pm–5pm290 flights68.1%
- 5pm–8pm138 flights68.6%
- 8pm–5am71 flights81.4%
Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is the strongest at 81.4% on time. The full set of windows spans 13 points.
Across the year
When delays peak on this route
This route's year swings by 22 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.
Delays peak in April, when the on-time rate falls to 58.1%. August is the strongest month at 80.3%. Moving a flexible trip across that boundary buys 22 points. July was the busiest month here, with 155 flights.
Across the week, Friday is the strongest day at 78.4% on time and Wednesday the weakest at 66.4%. 12 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 11,000 reported delay minutes.
- 35%National Airspace System
- 30%Late-arriving aircraft
- 27%Carrier
- 7%Extreme weather
- 1%Security
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 3,775 minutes out of 11,000, against a national NAS share of 21%. The split is drawn from 10,727 reported delay minutes.
Cancellations are rare at 0.76%, below the national 1.81% 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
7.3% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last roughly 55 minutes, which a normal layover absorbs.
At 2,846 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 is a different operation and performs like one: it runs 77.2% on time across 787 flights, 3 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 3 points of difference.
One caution: this is a thin sample. 786 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 ANC after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 786 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 73.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 778 completed flights over 12 months sit behind that.
Common questions
ORD to ANC questions
How often is ORD to ANC delayed?
About one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 26.2% of the 786 flights in this analysis, against 22.4% nationally. Delayed flights are late by roughly 55 minutes on average.
How reliable is ORD to ANC compared with the rest of the country?
73.8% of flights arrive on time here against a national 77.6%, a difference of 4 points against it. That is worth a C+ on this site's grading scale.
What time of day has the fewest delays on ORD to ANC?
The 8pm–5am departure window is the strongest at 81.4% on time. The 2pm–5pm window is the weakest at 68.1%, 13 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 April delays on ORD to ANC?
April is the weakest month at 58.1% on time, compared with 80.3% in August. Across the year that is 22 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
- ANC to ORD — the return legseparate record
- Chicago O'Hare International (ORD) delay statistics
- Alaska Airlines on ORD to ANC77.4%
- United Airlines on ORD to ANC73.7%
- American Airlines on ORD to ANC68.6%
- ORD to LGA, a related route67.3%
- SEA to ANC, a related route75.2%
- ORD to BOS, a related route67.6%
- Alaska Airlines on-time record77.4%
- United Airlines on-time record73.7%
- American Airlines on-time record68.6%
- The best time of day to fly, according to 7.04 million flight records
- Worst months to fly in the US, ranked by the data
Direction matters. ORD to ANC and ANC to ORD 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.