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

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
Fri, Oct 23	UA 2829	United Airlines	07:00	10:33	2h 33m	Airbus A321neo family
Fri, Oct 23	AS 1342	Alaska Airlines, Inc.	08:00	11:32	2h 32m	Boeing 737-900
Fri, Oct 23	UA 2476	United Airlines	08:45	12:17	2h 32m	Boeing 737-900
Fri, Oct 23	UA 2793	United Airlines	11:00	14:32	2h 32m	Boeing 737 MAX 9
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
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
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
Fri, Oct 23	F9 2422	Frontier Airlines	20:32	00:06	2h 34m	Airbus A320
Sat, Oct 24	F9 2818	Frontier Airlines	06:25	09:58	2h 33m	Airbus A320neo
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, the Boeing 737-900, 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 A320, the Airbus A321neo family, and the Airbus A320neo. 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.

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.