Flight number record
UA 2615
United Airlines · Portland to San Francisco
- Route
- PDX → SFO
- Departs
- 19:35
- Flights
- 308
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2615, check with United Airlines.
UA 2615 earns a D+, which is as low as this site's scale goes for a reason. Only 55.0% of flights arrive inside the 15-minute window, 23 points worse than the national rate of 77.6%. Late arrivals average about an hour. Treat any tight connection here as a coin flip. That rests on 308 flights, with a median arrival 8 minutes late.
The national on-time rate over the same period is 77.6%, so UA 2615 runs 23 points behind the country as a whole. Across a thousand flights that is about 226 extra late arrivals.
Key figures
On time
55.0%
Arrivals under 15 minutes late, of 307 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
0.32%
National rate is 1.81%
1 hour+ late
14.3%
National rate is 8.1%
These figures cover 308 flights between July 2025 and June 2026. Beyond the headline rate, 14.3% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Schedule
When UA 2615 flies
UA 2615 flies PDX to SFO without a single fixed slot. Its most common scheduled departure was 19:35, used on 110 of 308 flights, with 19:45 (39 flights) and 19:38 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 19:35110 flights35.7%
- Departs 19:4539 flights12.7%
- Departs 19:3836 flights11.7%
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 19:35 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and UA 2615 runs 13 points worse at 55.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
UA 2615 next to PDX to SFO
Every carrier on PDX to SFO combined arrived on time 72.3% of the time across 3,516 flights, so UA 2615 is 17 points behind it. United flew 1,661 flights on the same city pair under all its flight numbers, including this one, and those ran 69.1% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 24 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2615thin sample | 308 | 55.0% | 59 min | 0.32% | D+ |
| All United Airlines on PDX–SFO | 1,661 | 69.1% | 59 min | 0.30% | C+ |
| All carriers on PDX–SFO | 3,516 | 72.3% | 58 min | 0.43% | C+ |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 2615 quarter by quarter
UA 2615 did not run the same all year. Its best quarter was Jan–Mar 2026 at 70.4% on time and its weakest Apr–Jun 2026 at 24.5%, a swing of 46 points on roughly 77 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.
- Jul–Sep 202590 flights62.2%
- Oct–Dec 202587 flights50.6%
- Jan–Mar 202681 flights70.4%
- Apr–Jun 202650 flights24.5%
Scale runs 15% to 75%. Rows with fewer than 30 flights show a dash.
By weekday, UA 2615 did best on Tuesday at 68.2% on time and worst on Monday at 45.7%. Each day rests on about 44 flights, so a gap of 23 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 2615 runs late
One category carries most of the weight here. National Airspace System accounts for 59% of the 8,162 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.
- 59%National Airspace System
- 33%Late-arriving aircraft
- 7%Carrier
- 1%Extreme weather
59% 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 4,855 minutes out of 8,162, against a national NAS share of 21%. The split is drawn from 8,162 delay minutes reported on UA 2615.
Cancellations are rare at 0.32%, 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 14.3% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 550 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on ten other city pairs in the data, including SFO to AUS (47), SFO to FLL (31) and SFO to BWI (31), but none flew often enough under UA 2615 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to PDX to SFO only.
One caution: this is a thin sample. 308 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 UA 2615
For a booking, UA 2615 is a flight to put a long connection behind. 14.3% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- PDX to SFO, every carrier and departure
- SFO to PDX, the return direction
- Alaska Airlines 526 on the same route63.6%
- Alaska Airlines 128 on the same route78.3%
- Portland International (PDX) delay statistics
- San Francisco International (SFO) delay statistics
- United Airlines on-time record
- Every United Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
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.