Denver (DEN) to San Diego (SAN) flights: who flies it

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
Thu, Oct 22	AS 3120	Alaska Airlines, Inc.	09:45	11:26	2h 41m	Embraer E175
Thu, Oct 22	UA 1940	United Airlines	11:29	12:55	2h 26m	Airbus A321neo family
Thu, Oct 22	AS 1342	Alaska Airlines, Inc.	12:31	14:01	2h 30m	Boeing 737-900
Thu, Oct 22	UA 1302	United Airlines	13:25	14:50	2h 25m	Boeing 737-900
Thu, Oct 22	F9 2817	Frontier Airlines	14:39	16:08	2h 29m	Airbus A320
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
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
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
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, the Airbus A321neo family, and the Boeing 737 MAX 9. Alaska Airlines flies the Boeing 737-900, the Embraer E175, and the Boeing 737-800. Frontier Airlines flies the Airbus A321, the Airbus A320neo, and the Airbus A320. 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.

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.