--- title: "Denver (DEN) to San Diego (SAN) flights: who flies it" description: "Alaska Airlines, United Airlines and Frontier Airlines fly nonstop from DEN to SAN, about 77 flights a week. Upgrade and award space by date on 2LNR, next 14 days free." canonical: "https://2lnr.com/routes/den-san" url: "https://2lnr.com/routes/den-san.md" date_modified: "2026-10-18T05:10:47Z" --- # Denver to San Diego (DEN-SAN): nonstop upgrade & award space United Airlines, Alaska Airlines, and Frontier Airlines fly nonstop between Denver (DEN) and San Diego (SAN), roughly 77 times a week. The timetable below shows the nonstop scheduled at 2h 22m to 2h 41m 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 DEN to SAN on the interactive map [Get started free](https://2lnr.com/login) 77 Flights a week, 4-week average 2h 22m to 2h 41m Scheduled flight time 852 mi Nonstop distance Free To get started ## Denver to San Diego flight schedule Scheduled nonstop departures for DEN to SAN 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 Denver (DEN) to San Diego (SAN) | Date | Flight | Airline | Departs DEN | Arrives SAN | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Thu, Oct 22 | UA 2309 | United Airlines | 07:43 | 09:05 | 2h 22m | [Boeing 737 MAX 9](https://2lnr.com/seatmaps/ua/737-max-9.md) | | Thu, Oct 22 | AS 3120 | Alaska Airlines, Inc. | 09:45 | 11:26 | 2h 41m | [Embraer E175](https://2lnr.com/seatmaps/as/e175.md) | | Thu, Oct 22 | UA 1940 | United Airlines | 11:29 | 12:55 | 2h 26m | [Airbus A321neo family](https://2lnr.com/seatmaps/ua/a321neo.md) | | Thu, Oct 22 | AS 1342 | Alaska Airlines, Inc. | 12:31 | 14:01 | 2h 30m | [Boeing 737-900](https://2lnr.com/seatmaps/as/737-900.md) | | Thu, Oct 22 | UA 1302 | United Airlines | 13:25 | 14:50 | 2h 25m | [Boeing 737-900](https://2lnr.com/seatmaps/ua/737-900.md) | | Thu, Oct 22 | F9 2817 | Frontier Airlines | 14:39 | 16:08 | 2h 29m | [Airbus A320](https://2lnr.com/seatmaps/f9/a320.md) | | Thu, Oct 22 | UA 1281 | United Airlines | 15:40 | 17:05 | 2h 25m | Boeing 737-900 | | Thu, Oct 22 | AS 636 | Alaska Airlines, Inc. | 18:59 | 20:34 | 2h 35m | [Boeing 737-800](https://2lnr.com/seatmaps/as/737-800.md) | | Thu, Oct 22 | UA 540 | United Airlines | 19:10 | 20:39 | 2h 29m | Airbus A321neo family | | Thu, Oct 22 | UA 2395 | United Airlines | 21:00 | 22:27 | 2h 27m | Boeing 737-900 | | Thu, Oct 22 | F9 2711 | Frontier Airlines | 22:29 | 23:56 | 2h 27m | [Airbus A321](https://2lnr.com/seatmaps/f9/a321.md) | | Fri, Oct 23 | UA 2309 | United Airlines | 07:43 | 09:05 | 2h 22m | Boeing 737 MAX 9 | | Fri, Oct 23 | AS 3120 | Alaska Airlines, Inc. | 09:45 | 11:26 | 2h 41m | Embraer E175 | | Fri, Oct 23 | UA 1940 | United Airlines | 11:29 | 12:55 | 2h 26m | Airbus A321neo family | | Fri, Oct 23 | AS 1342 | Alaska Airlines, Inc. | 12:31 | 14:01 | 2h 30m | Boeing 737-900 | | Fri, Oct 23 | UA 1302 | United Airlines | 13:25 | 14:50 | 2h 25m | Boeing 737-900 | | Fri, Oct 23 | F9 2817 | Frontier Airlines | 14:39 | 16:08 | 2h 29m | [Airbus A320neo](https://2lnr.com/seatmaps/f9/a320neo.md) | | Fri, Oct 23 | UA 1281 | United Airlines | 15:40 | 17:05 | 2h 25m | Boeing 737-900 | | Fri, Oct 23 | AS 636 | Alaska Airlines, Inc. | 18:59 | 20:34 | 2h 35m | Boeing 737-800 | | Fri, Oct 23 | UA 540 | United Airlines | 19:10 | 20:39 | 2h 29m | Airbus A321neo family | | Fri, Oct 23 | UA 2395 | United Airlines | 21:00 | 22:27 | 2h 27m | Boeing 737-900 | | Fri, Oct 23 | F9 2711 | Frontier Airlines | 22:29 | 23:56 | 2h 27m | Airbus A321 | | Sat, Oct 24 | UA 2309 | United Airlines | 07:43 | 09:05 | 2h 22m | Boeing 737 MAX 9 | | Sat, Oct 24 | AS 3120 | Alaska Airlines, Inc. | 09:45 | 11:26 | 2h 41m | Embraer E175 | | Sat, Oct 24 | UA 1940 | United Airlines | 11:29 | 12:55 | 2h 26m | Airbus A321neo family | | Sat, Oct 24 | AS 1342 | Alaska Airlines, Inc. | 12:31 | 14:01 | 2h 30m | Boeing 737-900 | | Sat, Oct 24 | UA 1302 | United Airlines | 13:25 | 14:50 | 2h 25m | Boeing 737-900 | | Sat, Oct 24 | F9 2817 | Frontier Airlines | 14:12 | 15:41 | 2h 29m | Airbus A320neo | | Sat, Oct 24 | UA 1281 | United Airlines | 15:40 | 17:05 | 2h 25m | Boeing 737-900 | | Sat, Oct 24 | AS 636 | Alaska Airlines, Inc. | 18:59 | 20:34 | 2h 35m | Boeing 737-900 | | Sat, Oct 24 | UA 540 | United Airlines | 19:10 | 20:39 | 2h 29m | Airbus A321neo family | | Sat, Oct 24 | F9 2711 | Frontier Airlines | 22:29 | 23:56 | 2h 27m | Airbus A321 | | Sun, Oct 25 | AS 3120 | Alaska Airlines, Inc. | 09:45 | 11:26 | 2h 41m | Embraer E175 | | Sun, Oct 25 | UA 1940 | United Airlines | 11:25 | 12:56 | 2h 31m | Airbus A321neo family | | Sun, Oct 25 | AS 1342 | Alaska Airlines, Inc. | 12:31 | 14:01 | 2h 30m | Boeing 737-900 | | Sun, Oct 25 | UA 1302 | United Airlines | 13:25 | 14:55 | 2h 30m | Boeing 737-900 | | Sun, Oct 25 | F9 2817 | Frontier Airlines | 14:39 | 16:08 | 2h 29m | Airbus A320neo | | Sun, Oct 25 | UA 1281 | United Airlines | 15:40 | 17:05 | 2h 25m | Boeing 737-900 | | Sun, Oct 25 | AS 636 | Alaska Airlines, Inc. | 18:59 | 20:34 | 2h 35m | Boeing 737-800 | | Sun, Oct 25 | UA 540 | United Airlines | 19:10 | 20:39 | 2h 29m | Airbus A321neo family | Showing the first 40 of 74 scheduled DEN to SAN departures across 7 days with service, starting October 22, 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 DEN to SAN date on the interactive map ## Aircraft on the Denver to San Diego nonstop In the schedule table on this page, United Airlines flies the [Boeing 737-900](https://2lnr.com/seatmaps/ua/737-900.md), the [Airbus A321neo family](https://2lnr.com/seatmaps/ua/a321neo.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 A320neo](https://2lnr.com/seatmaps/f9/a320neo.md), and the [Airbus A320](https://2lnr.com/seatmaps/f9/a320.md). Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure. ## Confirmed upgrade & award space on DEN to SAN departures 2LNR tracks confirmed upgrade and award space on Alaska Airlines, segment by segment and date by date. Open the calendar for Denver to San Diego 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 13 of the 14 Denver to San Diego 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 DEN to SAN 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 DEN to SAN on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Denver to San Diego nonstop Carriers operating DEN to SAN 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 DEN to SAN on the interactive map → ## Frequently asked questions about DEN to SAN **How long is the flight from Denver (DEN) to San Diego (SAN)?** Scheduled flight times from Denver (DEN) to San Diego (SAN) run from 2h 22m to 2h 41m 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 DEN to SAN?** United Airlines, Alaska Airlines, and Frontier Airlines fly DEN to SAN nonstop. 2LNR tracks confirmed upgrade and award space on Alaska Airlines. **How many flights a week are there from DEN to SAN?** About 77 nonstop flights a week run between Denver (DEN) and San Diego (SAN) 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 DEN to SAN depart?** Scheduled DEN to SAN nonstops in the next 7 days with service leave between 07:43 and 22:29, local time at Denver. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate DEN to SAN nonstop?** The schedule table on this page lists 11 flight numbers for DEN to SAN nonstops, including UA 540, UA 1281, UA 1302, and UA 1940 on United Airlines; AS 636, AS 1342, and AS 3120 on Alaska Airlines; and F9 2817 on Frontier Airlines. The table lists each departure by date with its times and aircraft. **How do I check upgrade or award availability on DEN to SAN?** Open the DEN to SAN 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 [SAN to DEN upgrade and award space](https://2lnr.com/routes/san-den.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 Denver (DEN)](https://2lnr.com/routes/den.md), or [every route from San Diego (SAN)](https://2lnr.com/routes/san.md). Nonstops to San Diego (SAN) from other airports within 150 miles of Denver (DEN): - [Eagle (EGE) to San Diego (SAN)](https://2lnr.com/routes/ege-san.md), 119 miles from DEN - [Hayden (HDN) to San Diego (SAN)](https://2lnr.com/routes/hdn-san.md), 141 miles from DEN Nonstops from Denver (DEN) to other airports within 150 miles of San Diego (SAN): - [Denver (DEN) to Carlsbad (CLD)](https://2lnr.com/routes/den-cld.md), 28 miles from SAN - [Denver (DEN) to Santa Ana (SNA)](https://2lnr.com/routes/den-sna.md), 76 miles from SAN - [Denver (DEN) to Palm Springs (PSP)](https://2lnr.com/routes/den-psp.md), 85 miles from SAN - [Denver (DEN) to Ontario (ONT)](https://2lnr.com/routes/den-ont.md), 94 miles from SAN - [Denver (DEN) to Los Angeles (LAX)](https://2lnr.com/routes/den-lax.md), 110 miles from SAN 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 DEN to SAN 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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