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 108 times a week. With United Airlines running most of the schedule, the shape of a week is predictable, which makes an open premium seat on a given date easy to spot and quick to lose. 2LNR tracks confirmed upgrade and award space on Alaska Airlines, on every SAN to DEN 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.

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108
Nonstop flights a week
852 mi
Nonstop distance
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San Diego to Denver flight schedule

Scheduled nonstop departures for SAN to DEN, 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 San Diego (SAN) to Denver (DEN)
Date Flight Airline Departs SAN Arrives DEN Duration Aircraft
F9 2818Frontier Airlines06:2510:032h 38m32N
UA 1241United Airlines06:3010:062h 36m32Q
UA 2045United Airlines06:3010:062h 36m32Q
UA 2829United Airlines06:3010:062h 36m32Q
UA 2476United Airlines08:4512:172h 32m739
AS 1422Alaska Airlines, Inc.08:4812:202h 32m7M9
UA 1715United Airlines10:5514:272h 32m7M9
UA 2793United Airlines11:0014:322h 32m7M9
UA 1565United Airlines12:3716:102h 33m32Q
AS 3012Alaska Airlines, Inc.15:4519:182h 33mE75
F9 4990Frontier Airlines15:4519:202h 35m32Q
AS 3029Alaska Airlines, Inc.15:5119:262h 35mE75
UA 682United Airlines16:1119:402h 29m7M9
AS 1423Alaska Airlines, Inc.17:4521:132h 28m7M9
F9 2818Frontier Airlines06:2509:592h 34m321
UA 1241United Airlines06:3010:062h 36m32Q
UA 2045United Airlines06:3010:062h 36m32Q
UA 2829United Airlines06:3010:062h 36m32Q
UA 2476United Airlines08:4512:182h 33m32Q
AS 1422Alaska Airlines, Inc.08:4812:202h 32m73J
UA 1715United Airlines10:5514:272h 32m7M9
UA 2793United Airlines11:0014:322h 32m7M9
UA 1565United Airlines12:3716:102h 33m32Q
AS 3012Alaska Airlines, Inc.15:4519:182h 33mE75
AS 3029Alaska Airlines, Inc.15:5119:262h 35mE75
UA 682United Airlines16:1119:402h 29m7M9
F9 4990Frontier Airlines16:5420:222h 28m32N
AS 1423Alaska Airlines, Inc.17:4521:132h 28m7M9
UA 519United Airlines18:5522:242h 29m739
F9 2422Frontier Airlines20:3200:062h 34m32N
F9 2818Frontier Airlines06:2509:592h 34m321
UA 1241United Airlines06:3010:062h 36m32Q
UA 1639United Airlines06:3010:062h 36m32Q
UA 2045United Airlines06:3010:062h 36m32Q
UA 2829United Airlines06:3010:062h 36m32Q
UA 2476United Airlines08:4512:182h 33m32Q
AS 1422Alaska Airlines, Inc.08:4812:202h 32m73J
F9 4990Frontier Airlines10:3614:082h 32m32N
UA 1715United Airlines10:5514:272h 32m7M9
UA 2793United Airlines11:0014:322h 32m7M9

Showing the first 40 of 107 scheduled SAN to DEN 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 SAN to DEN date on the interactive map

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.

See real availability

Confirmed upgrade and award seats on each SAN to DEN 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 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. 2LNR tracks confirmed upgrade and award space on each of them.

See SAN to DEN on the interactive map →

Frequently asked questions about SAN to DEN

How far is Denver from San Diego?
SAN to DEN 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 SAN to DEN?
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 SAN to DEN?
About 108 nonstop flights a week run between San Diego and Denver 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.
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.

Never miss SAN to DEN 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.

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