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Cheap flights from Denver to San Diego from £63

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SAN
11 Sep — 18 Sep1
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 83 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from Denver to San Diego

Enter your travel dates to find the best prices.

Cheapest flights from Denver to San Diego
Explore the most affordable flight options available from Denver to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 August 2026.

Sat 12/1213:25 -
Nonstop2h 28m
Mon 21/1219:10 -
Nonstop2h 30m
Deal found 11/8£140
Thu 24/1206:10 -
Nonstop2h 30m
Tue 29/1221:10 -
Nonstop2h 20m
Deal found 10/8£141
Wed 9/920:40 -
Nonstop2h 25m
Wed 16/915:15 -
Nonstop2h 25m
Deal found 12/8£143
Sat 12/1216:30 -
Nonstop2h 20m
Mon 21/1218:30 -
1 stop4h 35m
Deal found 11/8£144
Tue 15/907:35 -
Nonstop2h 20m
Tue 22/913:40 -
Nonstop2h 25m
Deal found 9/8£146
Mon 31/815:50 -
1 stop5h 55m
Thu 3/918:55 -
Nonstop2h 29m
Deal found 11/8£147
Thu 29/1017:00 -
1 stop4h 05m
Mon 2/1112:15 -
1 stop3h 50m
Deal found 9/8£149
Fri 11/917:20 -
Nonstop2h 25m
Mon 14/916:50 -
Nonstop2h 25m
Deal found 12/8£150
Thu 17/920:40 -
Nonstop2h 25m
Mon 21/907:35 -
Nonstop2h 30m
Deal found 10/8£150
Fri 25/917:20 -
Nonstop2h 25m
Mon 28/919:50 -
Nonstop2h 25m
Deal found 9/8£151
Tue 8/906:15 -
1 stop4h 20m
Sat 12/913:55 -
1 stop4h 45m
Deal found 9/8£153

Find flight deals from Denver to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 August 2026.

Round-trip from

£140

One-way from

£63

Popular in

June

Cheapest in

February

Average price

£157

Good one-way deal

£95 or less
United Airlines
  • United Airlines
  • 12/12-21/12
  • Nonstop
  • 4h 58m total
  • Denver to San Diego
Search Deals
Frontier
  • Frontier
  • 2/9
  • 1 total stop
  • 6h 30m total
  • Denver to San Diego
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£27 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a one-way flight from Denver Intl to San Diego.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Denver to San Diego that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 12 August 2026.
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 return flight

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Tue 13/10

06:35-10:17

1 stop4h 42m

San Diego

Sat 24/10

10:57-18:09

1 stop6h 12m

£161

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Sun 22/11

07:24-09:10

Nonstop2h 46m

San Diego

Thu 26/11

09:20-12:51

Nonstop2h 31m

£161

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Mon 23/11

10:45-15:55

1 stop6h 10m

San Diego

Thu 26/11

06:15-11:47

1 stop4h 32m

£175

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Tue 24/11

06:25-10:23

1 stop4h 58m

San Diego

Fri 27/11

06:15-11:47

1 stop4h 32m

£205

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Thu 24/12

07:40-09:14

Nonstop2h 34m

San Diego

Sat 2/1

16:45-22:31

1 stop4h 46m

£227

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Sat 17/10

16:15-21:05

2 stops5h 50m

San Diego

Mon 19/10

20:00-01:35

1 stop4h 35m

£228

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Tue 24/11

18:30-21:25

1 stop3h 55m

San Diego

Mon 30/11

08:00-13:15

1 stop4h 15m

£275

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Thu 8/10

07:07-18:29

2 stops12h 22m

San Diego

Mon 12/10

06:15-16:59

1 stop9h 44m

£373
Fastest return journey

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Fri 9/10

12:31-14:01

Nonstop2h 30m

San Diego

Mon 12/10

08:00-11:32

Nonstop2h 32m

£412

DenverSan Diego

DEN Denver Intl - SAN San Diego

DENSAN

Denver Intl

Mon 30/11

12:20-16:25

2 stops5h 05m

San Diego

Fri 4/12

12:35-17:40

1 stop4h 05m

£426

Flights are sorted by cheapest return flights first.

Deals found on 8/8

Showing 1-10 of 22 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 return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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?

The price you pay for your flight from Denver to San Diego may vary depending on when you book. For the best chance of a lower fare, look to book 82 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 £89). Flying from Denver to San Diego in June is currently the most expensive (average of £198). 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?

Find hourly flight availability from Denver to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 August 2026.

A simple way to save on the total cost of your ticket is to fly from Denver to San Diego at midday. If you’re flexible enough to do this you can expect to save up to 71% on your trip compared to booking a flight in the evening.

How much does it cost for a return flight from Denver to San Diego?

Airfare is typical for this route at the moment.

Denver to San Diego flights typically cost between £126 and £205 in December.
The cheapest return price found within the last 5 days was £140 on United Airlines (12 Dec–21 Dec).

Related info for your journey

Find useful and relevant information for your journey from Denver to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    This flight path from Denver Intl to San Diego was viewed by 2 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    A quick flight from Denver to San Diego can take about 2h 25m. Delta provides one of the quickest options available for as low as £161. The distance between Denver and San Diego is about 852 mi. This flight may include one or multiple stops.

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

    Before booking your flight to San Diego from Denver, check out the most reliable airlines to get you to your destination on time: Sun Country Air (100%), Frontier (77%), Alaska Airlines( 76%).

  • What are the cheapest flights from Denver to San Diego?

    While on average a flight from Denver to San Diego is generally £269, our data shows the cheapest flight currently is £95. When looking at the most popular route, (Denver Intl - San Diego), you can expect to pay £304 for that flight.

  • 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 holiday 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 £89). Flying from Denver to San Diego in June is currently the most expensive (average of £198). 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
Coronado

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Alternative routes for Denver to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Denver to San Diego?

Cheapflights helps you search for flights from Denver to San Diego via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Denver to San Diego?

Cheapflights simply makes it quick and affordable to book flights from Denver to San Diego by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Denver to San Diego with no change fees?

Yes! Cheapflights helps users easily find flights from Denver to San Diego with no change fees.

Can Cheapflights notify me if prices for flights from Denver to San Diego become cheaper?

Yes, Cheapflights offers price alerts on Denver to San Diego flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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