Flight number record

UA 2153

United Airlines · San Francisco to Redmond

Route: SFO → RDM
Departs: 10:35
Flights: 327
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2153, check with United Airlines.

UA 2153 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 77.6%. When something does go wrong the average delay runs roughly 35 minutes. That rests on 327 flights, with a median arrival 12 minutes early.

Set against the rest of the country, UA 2153's record is 14 points better than the US average of 77.6%. That gap is worth roughly 138 fewer late arrivals for every thousand flights.

On time

91.4%

Arrivals under 15 minutes late, of 326 completed flights

Avg delay

37 min

Across delayed arrivals only, not all flights

Cancelled

0.31%

National rate is 1.81%

1 hour+ late

1.2%

National rate is 8.1%

These figures cover 327 flights between July 2025 and June 2026. The median arrival is 12 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.

Schedule

When UA 2153 flies

UA 2153 flies SFO to RDM without a single fixed slot. Its most common scheduled departure was 10:35, used on 214 of 327 flights, with 10:28 (33 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:35214 flights65.4%
Departs 10:2833 flights10.1%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 10:35 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and UA 2153 runs 7 points better at 91.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

UA 2153 next to SFO to RDM

Every carrier on SFO to RDM combined arrived on time 77.7% of the time across 1,278 flights, so UA 2153 is 14 points ahead of it. United flew 621 flights on the same city pair under all its flight numbers, including this one, and those ran 84.3% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 12 points.

UA 2153 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2153thin sample	327	91.4%	37 min	0.31%	A+
All United Airlines on SFO–RDM	621	84.3%	62 min	0.64%	B+
All carriers on SFO–RDM	1,278	77.7%	60 min	1.02%	B
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 2153 quarter by quarter

Quarter by quarter UA 2153 held fairly steady: 89.7% in Jul–Sep 2025, 92.2% in Oct–Dec 2025, 94.0% in Jan–Mar 2026 and 90.1% in Apr–Jun 2026. A spread of 4 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202578 flights89.7%
Oct–Dec 202590 flights92.2%
Jan–Mar 202668 flights94.0%
Apr–Jun 202691 flights90.1%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, UA 2153 did best on Tuesday at 100.0% on time and worst on Sunday at 85.1%. Each day rests on about 47 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 2153 runs late

One category carries most of the weight here. Carrier accounts for 48% of the 1,027 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.

Carrier
48%
Late-arriving aircraft
30%
National Airspace System
22%

The largest share of delay minutes, 48%, 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 493 of the 1,027 delay minutes reported here. The split is drawn from 1,027 delay minutes reported on UA 2153.

Cancellations are rare at 0.31%, 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 routes

What a delay on this flight costs

Badly late arrivals are rare here: only 1.2% land an hour or more behind schedule, against 8.1% 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.

UA 2153 is not only a SFO to RDM flight. It also flew CLE to SFO (299 flights, 94.0% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 327 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.

Other routes flown as UA 2153
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
CLE to SFOthin sample	299	94.0%	38 min	0.00%	A+

What to do with this

Booking UA 2153

For a booking, UA 2153 has one of the better records a US domestic flight can show: 91.4% on time and 0.31% cancelled. That is a base rate, not a promise about any single day.

Where to go next

A flight number here means United Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

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