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 96 times a week. With this many departures on a short sector, premium cabins are small and turn over daily, so upgrade or award space opens and closes within hours. 2LNR tracks confirmed upgrade and award space on Alaska Airlines, on every DEN to SAN departure, so you know which flights have space before you book.

Schedule last confirmed . Departure times come from 2LNR's schedule data; confirm with the airline before you book.

See DEN to SAN on the interactive map Get started free
96
Nonstop flights a week
852 mi
Nonstop distance
Free
To get started

Denver to San Diego flight schedule

Scheduled nonstop departures for DEN to SAN, last checked against our schedule feed on September 6, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Schedule data dated .

Scheduled nonstop departures from Denver (DEN) to San Diego (SAN)
Date Flight Airline Departs DEN Arrives SAN Duration Aircraft
AS 1424Alaska Airlines, Inc.06:2007:502h 30m7M9
F9 2421Frontier Airlines07:4009:052h 25m32Q
UA 2309United Airlines07:4309:052h 22m7M9
AS 1618Alaska Airlines, Inc.11:3213:052h 33m73H
UA 1940United Airlines11:3513:012h 26m32Q
UA 1302United Airlines13:2514:502h 25m739
AS 1422Alaska Airlines, Inc.13:4315:162h 33m7M9
UA 1281United Airlines15:4317:092h 26m32Q
UA 540United Airlines19:0520:342h 29m32Q
AS 3020Alaska Airlines, Inc.19:5921:402h 41mE75
AS 3029Alaska Airlines, Inc.20:0621:502h 44mE75
F9 4989Frontier Airlines22:2923:512h 22m32N
AS 1424Alaska Airlines, Inc.06:2007:502h 30m73J
UA 2309United Airlines07:4309:052h 22m7M9
AS 1618Alaska Airlines, Inc.11:3213:052h 33m73H
UA 1940United Airlines11:3513:012h 26m32Q
UA 1302United Airlines13:2514:502h 25m739
AS 1422Alaska Airlines, Inc.13:4315:162h 33m7M9
F9 2817Frontier Airlines14:2915:592h 30m32N
UA 1281United Airlines15:4517:102h 25m739
UA 540United Airlines19:0520:342h 29m32Q
AS 3020Alaska Airlines, Inc.19:5921:402h 41mE75
AS 3029Alaska Airlines, Inc.20:0621:502h 44mE75
UA 1835United Airlines21:0022:252h 25m739
UA 2395United Airlines21:0022:272h 27m738
F9 2711Frontier Airlines22:2923:512h 22m321
AS 1424Alaska Airlines, Inc.06:2007:502h 30m73J
UA 2309United Airlines07:4309:052h 22m7M9
F9 2421Frontier Airlines08:1009:412h 31m32N
AS 1618Alaska Airlines, Inc.11:3213:052h 33m73H
UA 1940United Airlines11:3513:012h 26m32Q
UA 1302United Airlines13:2514:502h 25m739
AS 1422Alaska Airlines, Inc.13:4315:162h 33m7M9
F9 2817Frontier Airlines14:2915:592h 30m321
UA 1281United Airlines15:3517:002h 25m739
UA 540United Airlines19:0520:342h 29m32Q
AS 3020Alaska Airlines, Inc.19:5921:402h 41mE75
AS 3029Alaska Airlines, Inc.20:0621:502h 44mE75
UA 1835United Airlines21:0022:252h 25m739
UA 2395United Airlines21:0022:272h 27m738

Showing the first 40 of 96 scheduled DEN to SAN departures across the next 7 days with service. 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 has not filed that value in the schedule data we hold. Aircraft are IATA equipment codes as filed, and can change up to departure.

See every DEN to SAN date on the interactive map

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.

See real availability

Confirmed upgrade and award seats on each DEN to SAN departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are 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. 2LNR tracks confirmed upgrade and award space on each of them.

See DEN to SAN on the interactive map →

Frequently asked questions about DEN to SAN

How far is San Diego from Denver?
DEN to SAN covers about 852 miles nonstop. Flight times vary by aircraft and season; the schedule table on this page lists each scheduled departure with its own times.
Which airlines fly nonstop from DEN to SAN?
United Airlines, Alaska Airlines, and Frontier Airlines fly the route nonstop. 2LNR tracks confirmed upgrade and award space on Alaska Airlines.
How many flights a week are there from DEN to SAN?
About 96 nonstop flights a week run between Denver and San Diego 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 06:20 and 22:29, local time at Denver. The schedule table on this page lists every departure by date, with its arrival time 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.

Never miss DEN to SAN upgrade or award space

See what is open by date on this route, the next 14 days free on every product and the full horizon on Pro.

Get started free