United Airlines Denver to San Diego Flights

Return flight: San Diego – Denver

Cheapflightsplus.com will find cheap United Airlines flights from Denver to San Diego. Compare airline ticket prices and book air tickets starting from $82 from trusted online travel agencies, web sites and directly from airlines. Check flights schedule of United Airlines, arrivals and departure details below.

Find Cheap Airfare Denver (CO) — San Diego (CA) by United Airlines

To find cheap tickets choose a day of your departure with attractive price on the graph below and click «Find flights». For round trip flights please click «Check prices for return flight». The cheapest airfare is in june: one-way - $82, two-way – $141.
Direct flights
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Below is a detailed 2025 flight schedule for today, tomorrow and all other days. It may vary depending on season and a day of the week of your desired trip. We recommend booking your itinerary at least 2 weeks prior your travel to get the best price and availability by the airline.
Departure Arrival Flight Details Flight Time Price
11:22 am — 12:46 pm
11:22 am — 12:46 pm UA2381 United Airlines
Denver — San Diego
2h 24m
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from$122
11:28 am — 12:52 pm
11:28 am — 12:52 pm UA583 United Airlines
Denver — San Diego
2h 24m
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from$99
11:28 am — 12:52 pm
11:28 am — 12:52 pm UA2412 United Airlines
Denver — San Diego
2h 24m
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from$114
11:33 am — 12:57 pm
11:33 am — 12:57 pm UA1940 United Airlines
Denver — San Diego
2h 24m
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from$91
1:38 pm — 2:59 pm
1:38 pm — 2:59 pm UA1302 United Airlines
Denver — San Diego
2h 21m
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from$91
4:03 pm — 5:24 pm
4:03 pm — 5:24 pm UA1281 United Airlines
Denver — San Diego
2h 21m
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from$90
7:14 pm — 8:38 pm
7:14 pm — 8:38 pm UA540 United Airlines
Denver — San Diego
2h 24m
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from$82
7:45 am — 9:09 am
7:45 am — 9:09 am UA2309 United Airlines
Denver — San Diego
2h 24m
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from$82
8:50 pm — 10:14 pm
8:50 pm — 10:14 pm UA1835 United Airlines
Denver — San Diego
2h 24m
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from$82
10:09 am — 3:08 pm
10:09 am — 11:51 am UA1572 United Airlines
Denver — San Francisco
1h 39m stop
1:30 pm — 3:08 pm UA1106 United Airlines
San Francisco — San Diego
5h 59m
including layover
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from$94
10:15 am — 1:40 pm
10:15 am — 11:45 am UA405 United Airlines
Denver — Los Angeles
56m stop
12:41 pm — 1:40 pm UA5216 United Airlines
Los Angeles — San Diego
4h 25m
including layover
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from$94
11:40 am — 4:30 pm
11:40 am — 1:22 pm UA1561 United Airlines
Denver — San Francisco
1h 30m stop
2:52 pm — 4:30 pm UA1142 United Airlines
San Francisco — San Diego
5h 50m
including layover
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from$93
1:30 pm — 6:23 pm
1:26 pm — 3:10 pm UA1812 United Airlines
Denver — San Francisco
1h 33m stop
4:45 pm — 6:25 pm UA1434 United Airlines
San Francisco — San Diego
5h 53m
including layover
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from$93
3:40 pm — 8:16 pm
4:00 pm — 5:50 pm UA2633 United Airlines
Denver — San Francisco
1h 31m stop
6:55 pm — 8:36 pm UA2633 United Airlines
San Francisco — San Diego
5h 36m
including layover
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from$128
3:42 pm — 8:48 pm
3:42 pm — 5:23 pm UA2633 United Airlines
Denver — San Francisco
1h 47m stop
7:10 pm — 8:48 pm UA1812 United Airlines
San Francisco — San Diego
6h 6m
including layover
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from$94
4:00 pm — 10:28 pm
4:00 pm — 5:43 pm UA2633 United Airlines
Denver — San Francisco
3h 10m stop
9:08 pm — 10:42 pm UA1074 United Airlines
San Francisco — San Diego
7h 28m
including layover
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from$93
5:55 pm — 11:36 pm
5:40 pm — 7:14 pm UA2240 United Airlines
Denver — Los Angeles
3h 8m stop
10:55 pm — 11:58 pm UA5612 United Airlines
Los Angeles — San Diego
6h 41m
including layover
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from$93
5:59 pm — 10:28 pm
5:59 pm — 7:45 pm UA1007 United Airlines
Denver — San Francisco
1h 8m stop
9:08 pm — 10:42 pm UA1074 United Airlines
San Francisco — San Diego
5h 29m
including layover
Find flight
from$98
6:08 am — 12:52 pm
6:08 am — 7:50 am UA2367 United Airlines
Denver — San Francisco
3h 20m stop
11:10 am — 12:52 pm UA682 United Airlines
San Francisco — San Diego
7h 44m
including layover
Find flight
from$93
6:08 am — 10:13 am
5:00 am — 6:42 am UA2367 United Airlines
Denver — San Francisco
43m stop
8:44 am — 10:27 am UA1483 United Airlines
San Francisco — San Diego
5h 5m
including layover
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from$98
8:00 pm — 11:36 pm
7:25 pm — 8:58 pm UA1368 United Airlines
Denver — Los Angeles
1h 6m stop
10:40 pm — 11:41 pm UA5612 United Airlines
Los Angeles — San Diego
4h 36m
including layover
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from$93
9:24 pm — 8:38 am
+1 day
9:24 pm — 11:09 pm UA746 United Airlines
Denver — San Francisco
7h 50m stop
7:00 am — 8:38 am UA1712 United Airlines
San Francisco — San Diego
12h 14m
including layover
Find flight
from$178
9:42 am — 4:30 pm
9:42 am — 11:24 am UA2041 United Airlines
Denver — San Francisco
3h 28m stop
2:52 pm — 4:30 pm UA1142 United Airlines
San Francisco — San Diego
7h 48m
including layover
Find flight
from$102
*Departure and arrival times are local. Last updated on 06/01/2025

Flight Information

There are 9 flights by United Airlines from Denver to San Diego every week with departures from Denver International and Arapahoe Co. All flights arrive at San Diego, AFB, Golden Triangle Reg., Lowndes County, San Diego Regional, El Cajon, Montgomery Field, Miramar NAS, North Island NAS, Brown Field Municipal, Gillespie Field.

Departures start from 10:07 am to 9:44 pm. Nonstop flight is 2h 21m. The time difference between Denver and San Diego is 1h.

  • The fastest flight 2h 21m
  • Average flight time 2h 24m
  • The earliest flight 10:07 am
  • The latest flight 9:44 pm
  • Distance 852 ml

The cheapest months for traveling to San Diego are june (from 69 $), september (from 110 $), august (from 110 $).

The most expensive and popular months are february (from 215 $), november (from 193 $), may (from 175 $).

The cheapest flight by United Airlines that our users were able to find is $82. This airfare is economy class on one-way UA2309 flight for September 27, 2025 leaving Denver International in Denver at 7:45 am, it includes all taxes and additional fees.

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Other Popular Airlines on the Route

Besides United Airlines there are other 6 airline carriers between Denver and San Diego. Please review schedules and prices from the most popular airlines to find the best airfare deals from Denver to San Diego.

Nonstop flights

There are 19 direct flights every day from Denver. Airlines and fares are below:

  • from $27
    Find
  • AS - Alaska Airlines
    from $63
    Find
  • HA - Hawaiian Airlines
    from $60
    Find
See more direct flights

Connecting Flights

List of flights with layovers (1 and more stops):

  • from $62
    Find
  • AS - Alaska Airlines
    from $87
    Find
  • SY - Sun Country Airlines
    from $120
    Find
  • HA - Hawaiian Airlines
    from $80
    Find
  • MX - Mexicana
    from $408
    Find
  • G4 - Allegiant Air
    from $126
    Find
See more connecting flights

How to book an air ticket yourself?

How to book an air ticket yourself?
  • Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
  • Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
  • Click «Buy» when you are ready — our system will redirect you to the site that sells the selected airfare.
  • Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
  • That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.

    To find a plane ticket, please select dates.

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