--- title: "Aspen to San Francisco flights: who flies ASE-SFO" description: "United Airlines flies Aspen (ASE) to San Francisco (SFO) nonstop about 7 times a week as UA 4657, scheduled at 2h 45m. See the full timetable and who flies it on 2LNR." canonical: "https://2lnr.com/routes/ase-sfo" url: "https://2lnr.com/routes/ase-sfo.md" date_modified: "2026-10-18T05:10:47Z" --- # Aspen to San Francisco (ASE-SFO): nonstop flights and who flies them United Airlines flies the ASE to SFO nonstop about 7 times a week. In the timetable below it flies as UA 4657, scheduled at 2h 45m for the 846 miles. Schedule last confirmed October 18, 2026. Departure times come from 2LNR's schedule data; confirm with the airline before you book. Updated October 23, 2026. See ASE to SFO on the interactive map [Get started free](https://2lnr.com/login) 7 Flights a week, 4-week average 2h 45m Scheduled flight time 846 mi Nonstop distance Free To get started ## Aspen to San Francisco flight schedule Scheduled nonstop departures for ASE to SFO starting October 22, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book. Scheduled nonstop departures from Aspen (ASE) to San Francisco (SFO) | Date | Flight | Airline | Departs ASE | Arrives SFO | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Thu, Oct 22 | UA 4657 | United Airlines | 09:40 | 11:25 | 2h 45m | [Embraer E175](https://2lnr.com/seatmaps/ua/e175.md) | | Fri, Oct 23 | UA 4657 | United Airlines | 09:40 | 11:25 | 2h 45m | Embraer E175 | | Sat, Oct 24 | UA 4657 | United Airlines | 09:40 | 11:25 | 2h 45m | Embraer E175 | | Sun, Oct 25 | UA 4657 | United Airlines | 09:40 | 11:25 | 2h 45m | Embraer E175 | | Mon, Oct 26 | UA 4657 | United Airlines | 09:40 | 11:25 | 2h 45m | Embraer E175 | | Tue, Oct 27 | UA 4657 | United Airlines | 09:40 | 11:25 | 2h 45m | Embraer E175 | | Wed, Oct 28 | UA 4657 | United Airlines | 09:40 | 11:25 | 2h 45m | Embraer E175 | Showing all 7 scheduled ASE to SFO departures across 7 days with service, starting October 22, 2026. Later dates are on the interactive map. Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure. See every ASE to SFO date on the interactive map ## Aircraft on the Aspen to San Francisco nonstop United Airlines flies the [Embraer E175](https://2lnr.com/seatmaps/ua/e175.md) on every departure in the schedule table on this page. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure. ## The full ASE to SFO nonstop schedule This page carries the full ASE to SFO nonstop schedule, who operates each departure and how often it runs; the reverse direction is linked below. ### See the schedule Who operates each ASE to SFO nonstop and how often it runs, from 2LNR's schedule data. ### Plan on the map See ASE to SFO on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Aspen to San Francisco nonstop Carriers operating ASE to SFO nonstop in the current schedule. - [United Airlines (UA) route map](https://2lnr.com/routes/airlines/ua.md)\ [The aircraft UA flies](https://2lnr.com/seatmaps/ua.md) See ASE to SFO on the interactive map → ## Frequently asked questions about ASE to SFO **How long is the flight from Aspen (ASE) to San Francisco (SFO)?** UA 4657 is scheduled at 2h 45m from Aspen (ASE) to San Francisco (SFO) on every departure in the schedule table on this page. The nonstop covers about 846 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from ASE to SFO?** United Airlines is currently the only airline flying ASE to SFO nonstop. 2LNR doesn't show award or upgrade space for it on ASE to SFO, so this page carries the schedule rather than a space claim. **How many flights a week are there from ASE to SFO?** About 7 nonstop flights a week run between Aspen (ASE) and San Francisco (SFO) in the current schedule, operated by United Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next. **What time do flights from ASE to SFO depart?** In the next 7 days with service, every scheduled ASE to SFO nonstop leaves at 09:40 local time at Aspen. The schedule table on this page lists each departure by date. **Which flights operate ASE to SFO nonstop?** United Airlines flies UA 4657 nonstop from Aspen (ASE) to San Francisco (SFO), the only flight number in the schedule table on this page. The table lists each date with its departure and arrival times and aircraft. **Does 2LNR show upgrade or award space on ASE to SFO?** Not on this route: 2LNR doesn't show award or upgrade space for United Airlines on ASE to SFO. The page carries the full ASE to SFO nonstop schedule and who flies each departure, and the reverse direction is linked below. Flying the other way? See [SFO to ASE nonstop flights](https://2lnr.com/routes/sfo-ase.md). Award seats rather than schedules? See [award availability by airline](https://2lnr.com/awards.md). Looking beyond this route? See [every route from Aspen (ASE)](https://2lnr.com/routes/ase.md), or [every route from San Francisco (SFO)](https://2lnr.com/routes/sfo.md). Nonstops to San Francisco (SFO) from other airports within 150 miles of Aspen (ASE): - [Eagle (EGE) to San Francisco (SFO)](https://2lnr.com/routes/ege-sfo.md), 29 miles from ASE - [Montrose (MTJ) to San Francisco (SFO)](https://2lnr.com/routes/mtj-sfo.md), 74 miles from ASE - [Hayden (HDN) to San Francisco (SFO)](https://2lnr.com/routes/hdn-sfo.md), 89 miles from ASE - [Denver (DEN) to San Francisco (SFO)](https://2lnr.com/routes/den-sfo.md), 124 miles from ASE Distances are great-circle between the airports, not driving distance. - [How to plan an upgrade by route](https://2lnr.com/guides/upgrade-strategy.md) ## See the full ASE to SFO nonstop schedule Every scheduled departure on this route, with who flies it. 2LNR shows upgrade and award space by date on the carriers it tracks, the next 14 days free on every product and the full horizon on Pro. [Get started free](https://2lnr.com/login)