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Cheap flights from Denver to San Diego from C$ 137

DEN — SAN
12 Oct — 19 Oct1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Denver Intl to San Diego are usually found in February or January, booked 88 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Denver to San Diego

Enter your travel dates to find the best prices.

Cheapest flights from Denver to San Diego

Tue 6/102:29 p.m. -
Nonstop2h 30m
Tue 13/106:25 a.m. -
Nonstop2h 33m
Deal found 7/9C$ 165
Fri 13/1110:29 p.m. -
Nonstop2h 28m
Tue 1/124:41 p.m. -
Nonstop2h 34m
Deal found 7/9C$ 168
Wed 14/1010:29 p.m. -
Nonstop2h 27m
Thu 15/102:01 p.m. -
1 stop8h 42m
Deal found 11/9C$ 169
Fri 2/1010:29 p.m. -
Nonstop2h 22m
Tue 13/106:25 a.m. -
Nonstop2h 33m
Deal found 7/9C$ 226
Fri 13/112:38 p.m. -
Nonstop2h 30m
Mon 30/115:29 p.m. -
Nonstop2h 31m
Deal found 7/9C$ 233
Fri 2/105:41 p.m. -
1 stop19h 09m
Tue 13/106:25 a.m. -
Nonstop2h 33m
Deal found 7/9C$ 251
Wed 14/1010:29 p.m. -
Nonstop2h 27m
Sun 18/106:25 a.m. -
Nonstop2h 33m
Deal found 8/9C$ 263
Sat 24/109:45 a.m. -
Nonstop2h 41m
Sat 24/102:33 p.m. -
Nonstop2h 28m
Deal found 8/9C$ 266

Find flight deals from Denver to San Diego

Round-trip from

C$ 165

One-way from

C$ 137

Popular in

June

Cheapest in

February

Average price

C$ 290
Frontier
  • Frontier
  • 6/10-13/10
  • Nonstop
  • 5h 03m total
  • Denver to San Diego
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United Airlines
  • United Airlines
  • 23/12-31/12
  • Nonstop
  • 2h 31m total
  • Denver to San Diego
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (C$ 87 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Denver to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Sat 14/11

6:10 p.m.-10:33 p.m.

1 stop5h 23m

San Diego

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 151

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Tue 9/3

12:49 p.m.-2:15 p.m.

Nonstop2h 26m

San Diego

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 151
Quickest round-trip

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Mon 18/1

8:00 a.m.-9:17 a.m.

Nonstop2h 17m

San Diego

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 151

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Sat 6/3

3:40 p.m.-10:02 p.m.

1 stop7h 22m

San Diego

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 151

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Sun 1/11

7:40 a.m.-11:57 a.m.

1 stop5h 17m

San Diego

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 165

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Fri 4/12

5:35 a.m.-8:58 a.m.

1 stop4h 23m

San Diego

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 165

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Thu 3/12

5:35 a.m.-8:58 a.m.

1 stop4h 23m

San Diego

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 165

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Tue 8/12

10:43 a.m.-4:25 p.m.

1 stop6h 42m

San Diego

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 165

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Wed 10/3

5:40 a.m.-9:06 a.m.

1 stop4h 26m

San Diego

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 165

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Sun 7/3

7:58 a.m.-11:34 a.m.

1 stop4h 36m

San Diego

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 179

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Showing 1-10 of 20 resultsSorted by cheapest first
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Best time to book a flight from Denver to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Denver with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Denver to San Diego

How far ahead should I book a flight from Denver to San Diego?

To ensure you get the cheapest price possible for a flight from Denver to San Diego, you should look to book at least 82 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Denver to San Diego?

Currently, February is the cheapest month in which you can book a flight from Denver to San Diego (average of C$ 166). Flying from Denver to San Diego in June is currently the most expensive (average of C$ 370). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from DEN to SAN?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Denver to San Diego as you normally would.

How much does it cost to fly round-trip from Denver to San Diego?

Airfare is below average for this route at the moment.

Denver to San Diego flights typically cost between C$ 195 and C$ 405 in October.
The cheapest round-trip price found within the last 5 days was C$ 165 on Frontier (6 Oct-13 Oct).

Related info for your journey

  • How popular is this Denver to San Diego flight route?

    Within the past month, 3 users have taken a look at flights from Denver Intl to San Diego.

  • How long is the flight from Denver to San Diego?

    Airlines like Southwest, Alaska Airlines, and Delta fly from Denver to San Diego in about 2h 30m. The time it takes to get you to your destination can typically vary by up to 2h 30m. The distance between Denver and San Diego is about 1371 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most reliable airlines from Denver to San Diego?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Denver to San Diego on time: Frontier (73%), Alaska Airlines (67%), Volaris (60%).

  • Can I find deals for flights from Denver to San Diego that include hotel bookings?

    Yes. In addition to deals on Denver to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to San Diego.

  • Can I find deals for business class flights from Denver to San Diego?

    Yes. Cheapflights offers flight deals from Denver to San Diego by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Denver to San Diego?

    Currently, February is the cheapest month in which you can book a flight from Denver to San Diego (average of C$ 166). Flying from Denver to San Diego in June is currently the most expensive (average of C$ 370). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
La Mesa
Borrego Springs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Denver to San Diego

Denver to Los Angeles flights

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