Cheap Flights from San Diego, CA to Denver, CO from $108

Return flight: Denver – San Diego

On Cheapflightsplus.com you will find 4 direct and 31 connecting flights from San Diego to Denver. You can compare airfare deals from 6 airlines and multiple travel sites from $108, book and save on cheap plane tickets and last minute offers. Also check out SAN-DEN flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip San Diego to Denver Flight Deals

To find the cheapest one way airline ticket select the date with the lowest price on the calendar below and click «Find Flights». To search for round-trip flight deals click on the link «Check prices for return flights» and select the date of the return flight. Cheapest flights in November: $108 (one-way), $185 (round-trip).
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Full flight schedule will help you in detecting at what time planes fly from San Diego to Denver. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.
Departure Arrival Flight Details Flight Duration Price
06:45 — 10:13
06:45 — 10:13 UA2270 United Airlines
San Diego — Denver
2h 28m
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from$108
08:45 — 12:13
08:45 — 12:13 UA2476 United Airlines
San Diego — Denver
2h 28m
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from$108
12:45 — 16:13
12:45 — 16:13 UA1220 United Airlines
San Diego — Denver
2h 28m
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from$136
19:01 — 22:29
19:01 — 22:29 UA519 United Airlines
San Diego — Denver
2h 28m
Find flight
from$108
06:20 — 15:00
06:20 — 07:58 UA1986 United Airlines
San Diego — San Francisco
3h 19m stop
11:17 — 15:00 UA1374 United Airlines
San Francisco — Denver
7h 40m
including layover
Find flight
from$259
08:00 — 15:00
07:50 — 09:27 UA2863 United Airlines
San Diego — San Francisco
1h 39m stop
11:17 — 15:00 UA1374 United Airlines
San Francisco — Denver
6h
including layover
Find flight
from$275
09:45 — 18:13
09:42 — 11:20 UA305 United Airlines
San Diego — San Francisco
3h 7m stop
14:27 — 18:10 UA1702 United Airlines
San Francisco — Denver
7h 28m
including layover
Find flight
from$205
09:45 — 16:36
09:42 — 11:20 UA305 United Airlines
San Diego — San Francisco
1h 32m stop
12:55 — 16:36 UA1333 United Airlines
San Francisco — Denver
5h 51m
including layover
Find flight
from$273
10:15 — 19:59
10:15 — 15:39 UA2140 United Airlines
San Diego — Houston
2h 26m stop
18:05 — 19:59 UA1654 United Airlines
Houston — Denver
8h 44m
including layover
Find flight
from$408
10:43 — 19:33
10:43 — 12:20 UA2855 United Airlines
San Diego — San Francisco
3h 30m stop
15:50 — 19:33 UA566 United Airlines
San Francisco — Denver
7h 50m
including layover
Find flight
from$160
11:58 — 22:29
11:58 — 17:22 UA2237 United Airlines
San Diego — Houston
3h 13m stop
20:35 — 22:29 UA2215 United Airlines
Houston — Denver
9h 31m
including layover
Find flight
from$408
13:50 — 22:39
13:30 — 15:08 UA1763 United Airlines
San Diego — San Francisco
3h 35m stop
19:05 — 22:41 UA1230 United Airlines
San Francisco — Denver
7h 49m
including layover
Find flight
from$160
15:25 — 23:38
15:25 — 20:45 UA1179 United Airlines
San Diego — Houston
1h 12m stop
22:05 — 23:46 UA1338 United Airlines
Houston — Denver
7h 13m
including layover
Find flight
from$274
15:35 — 23:59
15:35 — 18:31 AS1135 Alaska Airlines
San Diego — Seattle
1h 46m stop
20:17 — 23:59 AS642 Alaska Airlines
Seattle — Denver
7h 24m
including layover
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from$179
16:00 — 00:48
+1 day
16:00 — 17:38 UA2117 United Airlines
San Diego — San Francisco
3h 37m stop
21:15 — 00:48 UA1317 United Airlines
San Francisco — Denver
7h 48m
including layover
Find flight
from$174
17:50 — 00:48
+1 day
17:50 — 19:28 UA1871 United Airlines
San Diego — San Francisco
1h 47m stop
21:15 — 00:48 UA1317 United Airlines
San Francisco — Denver
5h 58m
including layover
Find flight
from$161
20:45 — 21:47
+1 day
20:45 — 23:44 HA6533 Hawaiian Airlines
San Diego — Seattle
18h 8m stop
17:59 — 21:47 HA6654 Hawaiian Airlines
Seattle — Denver
24h 2m
including layover
Find flight
from$349
21:30 — 10:15
+1 day
21:30 — 23:00 F91572 Frontier Airlines
San Diego — Phoenix
8h 18m stop
07:18 — 10:15 F91376 Frontier Airlines
Phoenix — Denver
11h 45m
including layover
Find flight
from$169
22:20 — 08:58
+1 day
22:20 — 04:30 UA1726 United Airlines
San Diego — Chicago
2h 40m stop
07:10 — 08:58 UA791 United Airlines
Chicago — Denver
9h 38m
including layover
Find flight
from$733
12:02 — 17:01
+1 day
12:02 — 19:27 NK2103 Spirit Airlines
San Diego — Detroit
1h 18m stop
20:45 — 21:28 NK2104 Spirit Airlines
Detroit — Minneapolis
18h 26m stop
15:54 — 17:01 SY1609 Sun Country Airlines
Minneapolis — Denver
27h 59m
including layover
Find flight
from$507
13:17 — 17:01
+1 day
13:17 — 14:45 NK2565 Spirit Airlines
San Diego — Las Vegas
9h 10m stop
23:55 — 05:02 SY778 Sun Country Airlines
Las Vegas — Minneapolis
10h 52m stop
15:54 — 17:01 SY1609 Sun Country Airlines
Minneapolis — Denver
26h 44m
including layover
Find flight
from$570
19:01 — 08:27
+1 day
19:01 — 20:26 NK1997 Spirit Airlines
San Diego — Las Vegas
4h 33m stop
00:59 — 05:54 F91650 Frontier Airlines
Las Vegas — Dallas
1h 21m stop
07:15 — 08:27 F92147 Frontier Airlines
Dallas — Denver
12h 26m
including layover
Find flight
from$252
21:30 — 15:05
+1 day
21:30 — 23:00 F91572 Frontier Airlines
San Diego — Phoenix
8h stop
07:00 — 08:16 F93983 Frontier Airlines
Phoenix — Las Vegas
3h 36m stop
11:52 — 15:05 F92016 Frontier Airlines
Las Vegas — Denver
16h 35m
including layover
Find flight
from$315
22:30 — 18:24
+1 day
22:30 — 05:51 AM4444 Aeromexico
San Diego — Atlanta
4h 4m stop
09:55 — 11:30 AM5229 Aeromexico
Atlanta — Cancun
3h 35m stop
15:05 — 18:24 F971 Frontier Airlines
Cancun — Denver
18h 54m
including layover
Find flight
from$642
*Departure and arrival times - local. Updated on August 27, 2025

Flight Information

Below we will explain in detail what the flights cost on the destination from San Diego to Denver depends on and how to choose the most interesting flight option for you.

Distance between San Diego and Denver is 1371 miles. Time difference between the cities is 1h. Airplanes depart 06:15 to 22:30 from 11 San Diego airport and arrive 06:15 to 22:30 to 2 Denver airports. Average flight time is 2h 28m.

  • The fastest flight 2h 28m
  • Average flight time 2h 28m
  • The earliest flight 06:15
  • The latest flight 22:30
  • Distance 852 ml

The cheapest months to travel to Denver are september (from 108 $), october (from 112 $), august (from 114 $).

The most expensive months are may (from 169 $), february (from 168 $), june (from 152 $).

What is the lowest airfare San Diego to Denver?

The cheapest plane ticket found by our users is $108. This airfare is for economy class on one-way UA2270 flight by United Airlines for September 27, 2025 which leaves San Diego in San Diego at 06:45 am and arrives at Denver Denver International at 10:13.

Economy class
$108
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Business class
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First class
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Popular Airlines on the Route

The flight San Diego — Denver is served by 6 regular airlines and 2 low-cost airlines. Most of the flights on this route are operated by Frontier Airlines - 2 departures per week at the price of from $ 169 . And the most expensive tickets are offered by United Airlines airline - from $ 1473.

Direct flights

There are 4 nonstop flights on the route. The fastest direct flight is UA2270 by United Airlines takes 2h 28m and the cheapest is UA2270 by United Airlines for $108.

See more direct flights

Connecting Flights

There are 31 flights with layovers on the route. The fastest connecting flight is UA305 by United Airlines takes 5h 51m and the cheapest is UA2270 by United Airlines for $160.

  • from $169
    Find
  • from $160
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  • AS - Alaska Airlines
    from $179
    Find
  • HA - Hawaiian Airlines
    from $349
    Find
  • AM - Aeromexico
    from $642
    Find
  • NK - Spirit Airlines
    from $252
    Find
See more connecting flights

Airports

You can fly from San Diego to Denver from 11 airports (San Diego, San Diego Regional, Gillespie Field, Golden Triangle Reg., El Cajon, Lowndes County, Miramar NAS, Montgomery Field, North Island NAS, Brown Field Municipal, AFB).

San Diego airports

  • San Diego-SAN
    from $108
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  • San Diego Regional-USA
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  • Gillespie Field-SEE
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  • Golden Triangle Reg.-GTR
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  • El Cajon-CJN
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  • Lowndes County-UBS
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  • Miramar NAS-NKX
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  • Montgomery Field-MYF
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  • North Island NAS-NZY
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  • Brown Field Municipal-SDM
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  • AFB-CBM
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Denver airports

  • Denver International-DEN
    Find
  • Arapahoe Co-APA
    Find

How to book a plane 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 flight ticket.
  • 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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