Carrier route record

UAANC→ORD

United Airlines · Anchorage to Chicago

Flights: 438
Period: July 2025 to June 2026
Share of route: 56%
Carriers: 3

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with United Airlines.

United on ANC to ORD lands a B, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 438 flights, with a median arrival 8 minutes early.

The US average over the same twelve months is 77.6%, so there is little to separate United on ANC to ORD from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

80.8%

Arrivals under 15 minutes late, of 427 completed flights

Avg delay

70 min

Across delayed arrivals only, not all flights

Cancelled

1.83%

National rate is 1.81%

Whole route

77.2%

Every carrier on ANC to ORD, 787 flights

These figures cover 438 flights between July 2025 and June 2026. The median arrival is 8 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

United against every carrier on ANC to ORD

United flew 438 of the 787 flights on ANC to ORD, most of the route. Its 80.8% on time is 4 points better than the route as a whole, which runs 77.2%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from United at 80.8% to American at 70.1%. Two 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.

On-time performance by carrier on ANC to ORD
Airline	Flights	On time	Avg delay	Cancelled	Grade
United Airlines (this page)	438	80.8%	70 min	1.83%	B
Alaska Airlinesthin sample	211	74.6%	40 min	0.47%	C+
American Airlinesthin sample	138	70.1%	53 min	0.72%	C+

Departure window

When United 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 438 flights.

The overnight block holds up unusually well at 80.8% on time across 438 flights. Red-eyes fly into empty airspace and empty gates, and they are the first rotation of the aircraft's day rather than the last. The 8pm–5am window is the busiest, with 438 flights scheduled in it.

Across the year

United on ANC to ORD through the year

Jul–Sep 2025178 flights81.1%
Oct–Dec 202575 flights79.2%
Jan–Mar 202632 flights67.7%
Apr–Jun 2026153 flights83.9%

Scale runs 60% to 90%. 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 80.8% on time across 438 flights.

United on ANC to ORD did not run the same all year. Its best quarter was Apr–Jun 2026 at 83.9% on time and its weakest Jan–Mar 2026 at 67.7%, a swing of 16 points on roughly 110 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Across the week, Monday is the strongest day at 85.7% on time and Sunday the weakest at 72.6%. 13 points is a smaller lever than departure hour, but it is free.

Delay causes

Why United runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 45% of the 5,696 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
45%
Carrier
37%
National Airspace System
17%
Extreme weather
0%

45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 5,696 reported delay minutes here, that single category outweighs weather by 45 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 5,696 reported delay minutes.

The largest share of delay minutes, 37%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,124 of the 5,696 delay minutes reported here.

Cancellations sit at 1.83% against a national 1.81%, which is ordinary. Diversions add another 0.68%.

Connections and stage length

What a delay here costs

5.4% 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 a little over an hour, 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 73.7% on time across 438 flights, 7 points below 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 7 points of difference.

One caution: this is a thin sample. 438 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 United on ANC to ORD

Put together: treat all of this as provisional. 438 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 80.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 427 completed flights over 12 months sit behind that.

Where to go next

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.

Key figures