Cheap Flights from San Diego, CA to Denver, CO from $99

Return flight: Denver – San Diego

On Cheapflightsplus.com you will find 3 direct and 55 connecting flights from San Diego to Denver. You can compare airfare deals from 5 airlines and multiple travel sites from $99, 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.

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 27m
  • 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 99 $), october (from 111 $), august (from 111 $).

The most expensive months are november (from 342 $), june (from 149 $), july (from 137 $).

What is the lowest airfare San Diego to Denver?

The cheapest plane ticket found by our users is $99. This airfare is for economy class on one-way F91902 flight by Frontier Airlines for September 19, 2025 which leaves San Diego in San Diego at 12:04 am and arrives at Denver Denver International at 23:26.

Economy class
$99
Find
Business class
?
Find
First class
?
Find

Flight Schedule San Diego (California) to Denver (Colorado)

10:11 — 21:12
10h 1m flight time
Find flight
from$293
10:11 — 11:45 San Diego — Phoenix
F91572 Frontier Airlines
6h 33m stop
18:18 — 21:12 Phoenix — Denver
F91820 Frontier Airlines
11:46 — 22:02
9h 16m flight time
Find flight
from$360
11:46 — 14:50 San Diego — Seattle
HA6487 Hawaiian Airlines
3h 10m stop
18:00 — 22:02 Seattle — Denver
HA6654 Hawaiian Airlines
11:46 — 22:02
9h 16m flight time
Find flight
from$372
11:46 — 14:50 San Diego — Seattle
AS1137 Alaska Airlines
3h 10m stop
18:00 — 22:02 Seattle — Denver
AS1163 Alaska Airlines
12:01 — 19:53
6h 52m flight time
Find flight
from$372
12:01 — 17:20 San Diego — Houston
UA2237 United Airlines
52m stop
18:12 — 19:53 Houston — Denver
UA1654 United Airlines
12:01 — 22:00
8h 59m flight time
Find flight
from$372
12:01 — 17:20 San Diego — Houston
UA2237 United Airlines
2h 59m stop
20:19 — 22:00 Houston — Denver
UA1664 United Airlines
12:04 — 23:26
10h 22m flight time
Find flight
from$99
12:04 — 15:06 San Diego — Salt Lake City
F91902 Frontier Airlines
6h 39m stop
21:45 — 23:26 Salt Lake City — Denver
F94252 Frontier Airlines
12:52 — 16:20
2h 28m flight time
Find flight
from$116
San Diego — Denver
UA1483 United Airlines
13:45 — 22:02
7h 17m flight time
Find flight
from$225
13:45 — 16:45 San Diego — Seattle
AS1097 Alaska Airlines
1h 9m stop
17:59 — 21:47 Seattle — Denver
AS1163 Alaska Airlines
14:31 — 23:16
7h 45m flight time
Find flight
from$156
14:31 — 15:59 San Diego — Phoenix
F94578 Frontier Airlines
4h 21m stop
20:20 — 23:16 Phoenix — Denver
F92142 Frontier Airlines
14:31 — 21:12
5h 41m flight time
Find flight
from$288
14:31 — 15:59 San Diego — Phoenix
F94578 Frontier Airlines
2h 19m stop
18:18 — 21:12 Phoenix — Denver
F91820 Frontier Airlines
15:15 — 23:30
7h 15m flight time
Find flight
from$372
15:15 — 20:31 San Diego — Houston
UA1179 United Airlines
1h 26m stop
21:57 — 23:30 Houston — Denver
UA1650 United Airlines
16:03 — 19:30
2h 27m flight time
Find flight
from$342
San Diego — Denver
UA682 United Airlines
17:56 — 00:28+1day
5h 32m flight time
Find flight
from$367
17:56 — 19:35 San Diego — San Francisco
UA1871 United Airlines
1h 17m stop
20:52 — 00:28 San Francisco — Denver
UA1871 United Airlines
18:32 — 22:00
2h 28m flight time
Find flight
from$106
San Diego — Denver
UA519 United Airlines
19:11 — 09:01+1day
12h 50m flight time
Find flight
from$293
19:11 — 00:29 San Diego — Dallas
F91426 Frontier Airlines
7h 16m stop
07:45 — 09:01 Dallas — Denver
F92147 Frontier Airlines
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 and arrival times - local. Updated on October 27, 2025.

Popular Airlines on the Route

The flight San Diego — Denver is served by 5 regular airlines and 1 low-cost airline. Most of the flights on this route are operated by Alaska Airlines - 10 departures per week at the price of from $ 225 . And the most expensive tickets are offered by Hawaiian Airlines airline - from $ 1075.

Direct flights

There are 3 nonstop flights on the route. The fastest direct flight is UA682 by United Airlines takes 2h 27m and the cheapest is F91902 by Frontier Airlines for $106.

  • UA - United Airlines
    from $106
    Find
See more direct flights

Connecting Flights

There are 55 flights with layovers on the route. The fastest connecting flight is UA5249 by United Airlines takes 4h 14m and the cheapest is F91902 by Frontier Airlines for $99.

  • AS - Alaska Airlines
    from $225
    Find
  • F9 - Frontier Airlines
    from $99
    Find
  • HA - Hawaiian Airlines
    from $360
    Find
  • UA - United Airlines
    from $367
    Find
  • AM - Aeromexico
    from $496
    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 $99
    Find
  • San Diego Regional-USA
    Find
  • Gillespie Field-SEE
    Find
  • Golden Triangle Reg.-GTR
    Find
  • El Cajon-CJN
    Find
  • Lowndes County-UBS
    Find
  • Miramar NAS-NKX
    Find
  • Montgomery Field-MYF
    Find
  • North Island NAS-NZY
    Find
  • Brown Field Municipal-SDM
    Find
  • AFB-CBM
    Find

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.

Back