--- title: "San Diego (SAN) to Denver (DEN) flights: who flies it" description: "Alaska Airlines, United Airlines and Frontier Airlines fly nonstop from SAN to DEN, about 91 flights a week. Upgrade and award space by date on 2LNR, next 14 days free." canonical: "https://2lnr.com/routes/san-den" url: "https://2lnr.com/routes/san-den.md" date_modified: "2026-10-18T05:10:47Z" --- # San Diego to Denver (SAN-DEN): nonstop upgrade & award space United Airlines, Alaska Airlines, and Frontier Airlines fly nonstop between San Diego (SAN) and Denver (DEN), roughly 91 times a week. The timetable below shows the nonstop scheduled at 2h 13m to 2h 40m for the 852 miles. 2LNR checks confirmed upgrade and award space on Alaska Airlines flights on this route, so you can see which departures have space before you book. 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 SAN to DEN on the interactive map [Get started free](https://2lnr.com/login) 91 Flights a week, 4-week average 2h 13m to 2h 40m Scheduled flight time 852 mi Nonstop distance Free To get started ## San Diego to Denver flight schedule Scheduled nonstop departures for SAN to DEN starting October 23, 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 San Diego (SAN) to Denver (DEN) | Date | Flight | Airline | Departs SAN | Arrives DEN | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Fri, Oct 23 | F9 2818 | Frontier Airlines | 06:25 | 09:58 | 2h 33m | [Airbus A321](https://2lnr.com/seatmaps/f9/a321.md) | | Fri, Oct 23 | UA 2829 | United Airlines | 07:00 | 10:33 | 2h 33m | [Airbus A321neo family](https://2lnr.com/seatmaps/ua/a321neo.md) | | Fri, Oct 23 | AS 1342 | Alaska Airlines, Inc. | 08:00 | 11:32 | 2h 32m | [Boeing 737-900](https://2lnr.com/seatmaps/as/737-900.md) | | Fri, Oct 23 | UA 2476 | United Airlines | 08:45 | 12:17 | 2h 32m | [Boeing 737-900](https://2lnr.com/seatmaps/ua/737-900.md) | | Fri, Oct 23 | UA 2793 | United Airlines | 11:00 | 14:32 | 2h 32m | [Boeing 737 MAX 9](https://2lnr.com/seatmaps/ua/737-max-9.md) | | Fri, Oct 23 | UA 1565 | United Airlines | 12:37 | 16:10 | 2h 33m | Airbus A321neo family | | Fri, Oct 23 | AS 635 | Alaska Airlines, Inc. | 14:33 | 18:01 | 2h 28m | [Boeing 737-800](https://2lnr.com/seatmaps/as/737-800.md) | | Fri, Oct 23 | UA 682 | United Airlines | 16:11 | 19:40 | 2h 29m | Boeing 737 MAX 9 | | Fri, Oct 23 | F9 4990 | Frontier Airlines | 16:53 | 20:24 | 2h 31m | [Airbus A321neo family](https://2lnr.com/seatmaps/f9/a321neo.md) | | Fri, Oct 23 | UA 519 | United Airlines | 18:50 | 22:19 | 2h 29m | Boeing 737-900 | | Fri, Oct 23 | AS 3121 | Alaska Airlines, Inc. | 20:19 | 23:59 | 2h 40m | [Embraer E175](https://2lnr.com/seatmaps/as/e175.md) | | Fri, Oct 23 | F9 2422 | Frontier Airlines | 20:32 | 00:06 | 2h 34m | [Airbus A320](https://2lnr.com/seatmaps/f9/a320.md) | | Sat, Oct 24 | F9 2818 | Frontier Airlines | 06:25 | 09:58 | 2h 33m | [Airbus A320neo](https://2lnr.com/seatmaps/f9/a320neo.md) | | Sat, Oct 24 | UA 2829 | United Airlines | 07:00 | 10:33 | 2h 33m | Airbus A321neo family | | Sat, Oct 24 | AS 1342 | Alaska Airlines, Inc. | 08:00 | 11:32 | 2h 32m | Boeing 737-900 | | Sat, Oct 24 | UA 2476 | United Airlines | 08:45 | 12:17 | 2h 32m | Boeing 737-900 | | Sat, Oct 24 | UA 2793 | United Airlines | 10:55 | 14:27 | 2h 32m | Boeing 737 MAX 9 | | Sat, Oct 24 | UA 1565 | United Airlines | 12:37 | 16:10 | 2h 33m | Airbus A321neo family | | Sat, Oct 24 | AS 635 | Alaska Airlines, Inc. | 14:33 | 18:01 | 2h 28m | Boeing 737-900 | | Sat, Oct 24 | UA 682 | United Airlines | 16:11 | 19:40 | 2h 29m | Boeing 737 MAX 9 | | Sat, Oct 24 | F9 4990 | Frontier Airlines | 16:53 | 20:24 | 2h 31m | Airbus A321neo family | | Sat, Oct 24 | AS 3121 | Alaska Airlines, Inc. | 18:33 | 22:12 | 2h 39m | Embraer E175 | | Sat, Oct 24 | F9 2422 | Frontier Airlines | 20:32 | 00:06 | 2h 34m | Airbus A320 | | Sun, Oct 25 | F9 2818 | Frontier Airlines | 06:25 | 09:58 | 2h 33m | Airbus A321 | | Sun, Oct 25 | UA 741 | United Airlines | 06:30 | 10:04 | 2h 34m | Airbus A321neo family | | Sun, Oct 25 | AS 1342 | Alaska Airlines, Inc. | 08:00 | 11:32 | 2h 32m | Boeing 737-900 | | Sun, Oct 25 | UA 2476 | United Airlines | 08:45 | 12:17 | 2h 32m | Boeing 737-900 | | Sun, Oct 25 | UA 2793 | United Airlines | 11:00 | 14:32 | 2h 32m | Boeing 737 MAX 9 | | Sun, Oct 25 | UA 1565 | United Airlines | 12:37 | 16:10 | 2h 33m | Airbus A321neo family | | Sun, Oct 25 | UA 2263 | United Airlines | 14:30 | 17:43 | 2h 13m | Boeing 737-900 | | Sun, Oct 25 | AS 635 | Alaska Airlines, Inc. | 14:33 | 18:01 | 2h 28m | Boeing 737-800 | | Sun, Oct 25 | UA 682 | United Airlines | 16:11 | 19:40 | 2h 29m | Boeing 737 MAX 9 | | Sun, Oct 25 | UA 519 | United Airlines | 18:30 | 21:58 | 2h 28m | Boeing 737-900 | | Sun, Oct 25 | AS 3121 | Alaska Airlines, Inc. | 20:19 | 23:59 | 2h 40m | Embraer E175 | | Sun, Oct 25 | F9 2422 | Frontier Airlines | 20:32 | 00:06 | 2h 34m | Airbus A320 | | Mon, Oct 26 | F9 2818 | Frontier Airlines | 06:25 | 09:58 | 2h 33m | Airbus A321 | | Mon, Oct 26 | UA 741 | United Airlines | 06:30 | 10:04 | 2h 34m | Airbus A321neo family | | Mon, Oct 26 | UA 1599 | United Airlines | 06:45 | 10:19 | 2h 34m | Airbus A321neo family | | Mon, Oct 26 | AS 1342 | Alaska Airlines, Inc. | 08:00 | 11:32 | 2h 32m | Boeing 737-900 | | Mon, Oct 26 | UA 2476 | United Airlines | 08:45 | 12:17 | 2h 32m | Boeing 737-900 | Showing the first 40 of 87 scheduled SAN to DEN departures across 7 days with service, starting October 23, 2026. Every remaining date is 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 SAN to DEN date on the interactive map ## Aircraft on the San Diego to Denver nonstop In the schedule table on this page, United Airlines flies the [Airbus A321neo family](https://2lnr.com/seatmaps/ua/a321neo.md), the [Boeing 737-900](https://2lnr.com/seatmaps/ua/737-900.md), and the [Boeing 737 MAX 9](https://2lnr.com/seatmaps/ua/737-max-9.md). Alaska Airlines flies the [Boeing 737-900](https://2lnr.com/seatmaps/as/737-900.md), the [Embraer E175](https://2lnr.com/seatmaps/as/e175.md), and the [Boeing 737-800](https://2lnr.com/seatmaps/as/737-800.md). Frontier Airlines flies the [Airbus A321](https://2lnr.com/seatmaps/f9/a321.md), the [Airbus A320](https://2lnr.com/seatmaps/f9/a320.md), the [Airbus A321neo family](https://2lnr.com/seatmaps/f9/a321neo.md), and the [Airbus A320neo](https://2lnr.com/seatmaps/f9/a320neo.md). Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure. ## Confirmed upgrade & award space on SAN to DEN departures 2LNR tracks confirmed upgrade and award space on Alaska Airlines, segment by segment and date by date. Open the calendar for San Diego to Denver to see which departures have space, the next 14 days free on every product and the full horizon on Pro. Alaska Airlines award space was open on all 14 San Diego to Denver departure dates from October 19 to November 1 that 2LNR checked in the 7 days to October 19, 2026. ### See real availability Confirmed upgrade or award seats by date on the SAN to DEN departures 2LNR tracks, checked against live inventory so you know what's open before you book. ### Set an alert Premium inventory turns over fast. Watch this route on Pro and 2LNR notifies you when space appears on a date you're tracking. ### Plan on the map See SAN to DEN on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying San Diego to Denver nonstop Carriers operating SAN to DEN nonstop in the current schedule. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date. - [United Airlines (UA) route map](https://2lnr.com/routes/airlines/ua.md)\ [The aircraft UA flies](https://2lnr.com/seatmaps/ua.md) - [Alaska Airlines (AS) route map](https://2lnr.com/routes/airlines/as.md)\ [The aircraft AS flies](https://2lnr.com/seatmaps/as.md) - [Frontier Airlines (F9) route map](https://2lnr.com/routes/airlines/f9.md)\ [The aircraft F9 flies](https://2lnr.com/seatmaps/f9.md) See SAN to DEN on the interactive map → ## Frequently asked questions about SAN to DEN **How long is the flight from San Diego (SAN) to Denver (DEN)?** Scheduled flight times from San Diego (SAN) to Denver (DEN) run from 2h 13m to 2h 40m across the departures in the schedule table on this page. The nonstop covers about 852 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from SAN to DEN?** United Airlines, Alaska Airlines, and Frontier Airlines fly SAN to DEN nonstop. 2LNR tracks confirmed upgrade and award space on Alaska Airlines. **How many flights a week are there from SAN to DEN?** About 91 nonstop flights a week run between San Diego (SAN) and Denver (DEN) in the current schedule, operated by United Airlines, Alaska Airlines, and Frontier Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next. **What time do flights from SAN to DEN depart?** Scheduled SAN to DEN nonstops in the next 7 days with service leave between 06:25 and 20:32, local time at San Diego. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate SAN to DEN nonstop?** The schedule table on this page lists 15 flight numbers for SAN to DEN nonstops, including UA 682, UA 1565, UA 2476, and UA 2793 on United Airlines; AS 635, AS 1342, and AS 3121 on Alaska Airlines; and F9 2818 on Frontier Airlines. The table lists each departure by date with its times and aircraft. **How do I check upgrade or award availability on SAN to DEN?** Open the SAN to DEN route on the interactive map or the matrix to see confirmed upgrade and award space by date on Alaska Airlines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens. Flying the other way? See [DEN to SAN upgrade and award space](https://2lnr.com/routes/den-san.md). Award seats rather than schedules? See [Alaska Airlines award availability](https://2lnr.com/awards/as.md). Looking beyond this route? See [every route from San Diego (SAN)](https://2lnr.com/routes/san.md), or [every route from Denver (DEN)](https://2lnr.com/routes/den.md). Nonstops to Denver (DEN) from other airports within 150 miles of San Diego (SAN): - [Carlsbad (CLD) to Denver (DEN)](https://2lnr.com/routes/cld-den.md), 28 miles from SAN - [Santa Ana (SNA) to Denver (DEN)](https://2lnr.com/routes/sna-den.md), 76 miles from SAN - [Palm Springs (PSP) to Denver (DEN)](https://2lnr.com/routes/psp-den.md), 85 miles from SAN - [Ontario (ONT) to Denver (DEN)](https://2lnr.com/routes/ont-den.md), 94 miles from SAN - [Los Angeles (LAX) to Denver (DEN)](https://2lnr.com/routes/lax-den.md), 110 miles from SAN Nonstops from San Diego (SAN) to other airports within 150 miles of Denver (DEN): - [San Diego (SAN) to Eagle (EGE)](https://2lnr.com/routes/san-ege.md), 119 miles from DEN - [San Diego (SAN) to Hayden (HDN)](https://2lnr.com/routes/san-hdn.md), 141 miles from DEN Distances are great-circle between the airports, not driving distance. - [How Alaska upgrades clear](https://2lnr.com/about/as/upgrades.md) - [How to read award availability by date](https://2lnr.com/guides/award-availability.md) ## Never miss SAN to DEN upgrade or award space See what's open by date on this route, the next 14 days free on every product and the full horizon on Pro. 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