United Airlines· Callsign UAL1265

UA1265 from Denver to San Francisco, tracked live

United Airlines's domestic Denver-San Francisco service, 1,553 km west - tracked live here.

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DEN
Denver
Denver International Airport
1,553 km · 965 mi
Non-stop
SFO
San Francisco
San Francisco International Airport
Aircraft
Boeing 737-800
typical equipment
Distance
1,553 km
839 nautical miles
Heading
266°
tracks west
Clock change
-1 h
on arrival
Range used
27%
of the type's book range
Length rank
#350
of 439 tracked routes

Follow UA1265 in real time

The aircraft appears below whenever it is airborne and inside receiver coverage. Its planned route is drawn between the two airports.

UA1265 is not transmitting right now. It may be between rotations, on the ground, or out of receiver range - Check back near departure time. The full map has the rest of the sky, and what is flying over me will name whatever is above you instead.

UA1265 at a glance

  • The trip: 1,553 km (965 miles) from Denver to San Francisco, flying west.
  • How long: no published block time for this service yet.
  • Your watch: set it 1 hour back on arrival.
  • Window seat tip: the left (south-facing) side gets the sun on a daytime flight.
  • The plane: usually a Boeing 737-800. This route uses about 27% of how far it can fly.

UA1265 route overview: DEN to SFO

UA1265 distance and great-circle path

UA1265 covers 1,553 km, or 965 miles. That makes it a medium-haul flight, long enough for a full meal service, short enough for narrowbodies. Of the 439 routes we track, it ranks 350 by distance.

Both ends of this route are in United States. It is 1,553 km of domestic flying west, from Denver to San Francisco. Watches move 1 hour back between the two gates.

Our guide explains how the DEN-SFO route appears on a tracker map.

Can the Boeing 737-800 comfortably fly UA1265?

Not at all. At roughly 27% of its range, this is an easy trip for a Boeing 737-800. The airline picked it for cabin size, not distance. The full numbers are on our aircraft page for the Boeing 737-800.

What to know about UA1265

  • Time change: you land 1 hour behind the time you left.
  • High airport at the start: DEN sits 5,434 ft up. Thin air means a longer takeoff run.

What we know about UA1265

What flying DEN to SFO takes

It is a medium-haul sector, long enough for a full meal service, short enough for narrowbodies. United Airlines needs a narrowbody on the longer variants, or a widebody where demand justifies it: at this distance the choice is usually about seat count rather than range. The two ends are not symmetric. Denver is roughly 5,421 ft higher than the other airport, so the same aircraft is planned differently in each direction. In daylight the sun sits on the left (south-facing) side of the cabin for most of the crossing.

How we verified this

The origin and destination on this page are the ones we verified for callsign UAL1265 through adsbdb, not a schedule copied from elsewhere. We have logged it airborne on 38 days between 2026-09-19 and 2026-10-26. Timings are observations, not an official operational status: always confirm with the airline before travelling.

This page was published from our own tracking record rather than a third-party schedule feed, so it grows as we see the flight again. The seven-day log below is the raw version of the same evidence.

UA1265 activity in the past 7 days

Our database contains 5 observations of UA1265 across 5 UTC dates in this window, most recently 2026-10-26. Those records contain 5 distinct transponder addresses. The most frequently resolved route was DEN-SFO (5 records).

The median recorded visibility was 218 minutes. That is time inside receiver coverage, not airborne duration or an on-time-performance measurement.

Date (UTC)RouteFirst trackedLast trackedTracked for
2026-10-26 DEN → SFO 14:21 UTC 16:57 UTC 2h 36m
2026-10-25 DEN → SFO 00:00 UTC 04:35 UTC 4h 35m
2026-10-24 DEN → SFO 00:14 UTC 03:47 UTC 3h 32m
2026-10-23 DEN → SFO 00:21 UTC 03:59 UTC 3h 38m
2026-10-22 DEN → SFO 00:11 UTC 04:01 UTC 3h 51m

“First/last tracked” are when UA1265 entered and left receiver coverage, in UTC.

Airports and aircraft on UA1265

Every scheduled service we follow is listed in the tracker directory, including United Airlines and other tracked flights grouped by airline.

DEN Denver International Airport Denver, United States · live radar →
SFO San Francisco International Airport San Francisco, United States · live radar →
B738 Boeing 737-800 Typical equipment · specs →

How much CO2 does UA1265 emit?

Worked from the great-circle distance and the fuel burn measured for Boeing 737-800, the aircraft normally flying this route. Carbon dioxide only - see the method below.

Distance flown1,553 km
AircraftBoeing 737-800
Fuel burn rate3.59 kg per km
Fuel burned5,569 kg
CO2, whole flight17.6 tonnes
Seats, typical layout162
Passengers carried134 at an 83% load factor
CO2 per passenger131 kg

Where that lands by cabin

The aircraft burns the same fuel whoever is aboard, so the cabins divide one total rather than each carrying their own. A seat's share is the floor it takes up, which is why an economy seat comes out below the 131 kg cabin average and a flat bed well above it.

Economy143 seats, 119 flown
106 kg CO2 per seat
Business19 seats, 16 flown
309 kg CO2 per seat

Taken whole, UA1265 emits what 293 trees take back out of the air in a year. One economy seat on it accounts for about the same carbon dioxide as driving a petrol car 773 km, or 3,752 km of the same journey by train.

How this is worked out. Fuel burn is read from published measurements of this type, taken at a 926 km sector, the only published sector for this type, applied to this route's 1,553 km unadjusted. It counts carbon dioxide only, and the cabin split assumes the layout typical of this size of aircraft. Read the full method, sources and caveats, or put UA1265 against another flight.

Other tracked flights from Denver

FlightRouteTypical aircraft
DL302Denver (DEN) → Atlanta (ATL) Airbus A321DL302 flight tracker →
UA2437New York (LGA) → Denver (DEN) Boeing 737-700UA2437 flight tracker →
UA232Denver (DEN) → Chicago (ORD) McDonnell Douglas DC-10UA232 flight tracker →
UA328Denver (DEN) → Honolulu (HNL) Boeing 777-200UA328 flight tracker →

Guides relevant to UA1265

Chosen from this route's distance, timing, aircraft, airline and airports.

How airlines plan routes This medium-haul sector shows how aircraft size and local demand shape a network.
Boeing versus Airbus The typical aircraft is built by Boeing; these visual clues help identify it.
Airline alliances explained United Airlines belongs to Star Alliance, which affects connections and codeshares.

Data sources and review

Reviewed 2026-07-29 by Flight-Tracker.net Editorial Team

The route and typical schedule are maintained reference data. Live ADS-B observations are evidence of receiver coverage, not proof of on-time performance. Always confirm the operating date and times with the airline.

Read our schedule and observation review process, or inspect the machine-readable reference dataset.

Put UA1265 on your own site

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UA1265 frequently asked questions

How long is the UA1265 flight?

Denver to San Francisco is 1,553 km (965 miles) in a straight line. Actual airborne time varies with winds, routing and holding.

What aircraft operates UA1265?

Typically a Boeing 737-800 (full specifications), using roughly 27% of that type's published range.

Does UA1265 fly every day?

Frequency varies by season. Always confirm with the airline before travelling.

Can I track UA1265 live?

Yes. Whenever UA1265 is airborne and in receiver coverage the map above follows it live, with altitude, ground speed and heading. Between rotations, the seven-day log above shows where it has been.

More United Airlines flights to watch

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UA1752 Newark (EWR) → Orlando (MCO) Airbus A321 UA1752 flight tracker →
UA2497 Chicago (ORD) → Boston (BOS) Airbus A321 UA2497 flight tracker →
UA2840 Hagåtña (GUM) → San Francisco (SFO) Boeing 737-800 UA2840 flight tracker →
UA534 Honolulu (HNL) → Los Angeles (LAX) Boeing 737-900ER UA534 flight tracker →
UA64 Newark (EWR) → Lisbon (LIS) Boeing 787-10 Dreamliner UA64 flight tracker →
UA3 Los Angeles (LAX) → Honolulu (HNL) Boeing 767-300ER UA3 flight tracker →
UA249 Charlotte (CLT) → Newark (EWR) Boeing 737 MAX 8 UA249 flight tracker →
UA2804 Washington (IAD) → Newark (EWR) Boeing 737 MAX 8 UA2804 flight tracker →
UA2012 Panama City (PTY) → Newark (EWR) Boeing 737-800 UA2012 flight tracker →
UA2437 New York (LGA) → Denver (DEN) Boeing 737-700 UA2437 flight tracker →
UA2249 Phoenix (PHX) → San Francisco (SFO) Boeing 737-700 UA2249 flight tracker →
UA194 San Francisco (SFO) → Munich (MUC) Boeing 777-200ER UA194 flight tracker →
UA1641 Washington (IAD) → San Francisco (SFO) Boeing 737-900ER UA1641 flight tracker →
UA2127 New York (LGA) → Chicago (ORD) Boeing 757-200 UA2127 flight tracker →
UA1216 Newark (EWR) → Atlanta (ATL) 737-9 UA1216 flight tracker →
UA1034 Houston (IAH) → Panama City (PTY) 737MAX 9 UA1034 flight tracker →
UA1 San Francisco (SFO) → Singapore (SIN) Boeing 787-9 UA1 flight tracker →
UA857 San Francisco (SFO) → Shanghai (PVG) Boeing 777-300ER UA857 flight tracker →
UA863 San Francisco (SFO) → Sydney (SYD) Boeing 787-9 UA863 flight tracker →
UA232 Denver (DEN) → Chicago (ORD) McDonnell Douglas DC-10 UA232 flight tracker →
UA328 Denver (DEN) → Honolulu (HNL) Boeing 777-200 UA328 flight tracker →