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Cheap flights from San Diego to Denver from £66

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 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
31 Aug — 7 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Diego to Denver Intl are usually found in February or January, booked 63 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from San Diego to Denver

Enter your travel dates to find the best prices.

Cheapest flights from San Diego to Denver
Explore the most affordable flight options available from San Diego to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 August 2026.

Fri 18/914:40
SAN
-
DEN
1 stop4h 30m
Southwest
Sat 26/913:45
DEN
-
SAN
1 stop4h 30m
Southwest
Deal found 1/8£113
Fri 28/819:50
SAN
-
DEN
Nonstop2h 20m
Southwest
Mon 31/807:55
DEN
-
SAN
Nonstop2h 30m
Southwest
Deal found 30/7£117
Thu 10/917:30
SAN
-
DEN
1 stop4h 35m
Southwest
Sat 12/914:00
DEN
-
SAN
2 stops6h 30m
Southwest
Deal found 1/8£117
Fri 28/811:05
SAN
-
DEN
Nonstop2h 25m
Southwest
Tue 1/912:05
DEN
-
SAN
Nonstop2h 25m
Southwest
Deal found 29/7£124
Wed 16/911:45
SAN
-
DEN
Nonstop2h 25m
Southwest
Sat 19/913:35
DEN
-
SAN
2 stops6h 20m
Southwest
Deal found 29/7£125
Fri 30/1007:55
SAN
-
DEN
1 stop4h 05m
Southwest
Fri 30/1017:00
DEN
-
SAN
1 stop4h 05m
Southwest
Deal found 31/7£128
Sun 15/1106:15
SAN
-
DEN
Nonstop2h 25m
Southwest
Wed 18/1116:50
DEN
-
SAN
1 stop4h 40m
Southwest
Deal found 29/7£129
Fri 18/918:40
SAN
-
DEN
1 stop4h 10m
Southwest
Mon 21/919:00
DEN
-
SAN
1 stop4h 10m
Southwest
Deal found 30/7£132
Fri 23/1012:45
SAN
-
DEN
1 stop4h 00m
Southwest
Wed 28/1013:10
DEN
-
SAN
1 stop4h 40m
Southwest
Deal found 28/7£135
Fri 11/1211:00
SAN
-
DEN
Nonstop2h 25m
Southwest
Mon 14/1215:45
DEN
-
SAN
1 stop4h 05m
Southwest
Deal found 28/7£136
Sat 29/812:50
SAN
-
DEN
Nonstop2h 25m
Southwest
Sun 30/808:15
DEN
-
SAN
Nonstop2h 25m
Southwest
Deal found 27/7£139

Find flight deals from San Diego to Denver

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Denver (DEN). 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 1 August 2026.

Round-trip from

£113

One-way from

£66

Popular in

June

Cheapest in

February

Average price

£158

Good one-way deal

£452 or less
Southwest
  • Southwest
  • 18/9-26/9
  • 2 total stops
  • 9h 00m total
  • San Diego to Denver
Search Deals
Southwest
  • Southwest
  • 12/10
  • 1 total stop
  • 4h 50m total
  • San Diego to Denver
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£33 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% 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 San Diego to Denver Intl.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Diego to Denver 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 1 August 2026.
Use the filters below to find and compare flights from San Diego to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Fri 25/9

18:40-23:45

1 stop4h 05m

Denver Intl

Sun 27/9

21:25-22:50

Nonstop2h 25m

£139

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Thu 10/9

10:54-18:11

1 stop6h 17m

Denver Intl

Mon 14/9

19:55-23:47

1 stop4h 52m

£146

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Fri 25/9

10:54-18:11

1 stop6h 17m

Denver Intl

Sun 27/9

05:30-08:41

1 stop4h 11m

£146

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Tue 29/9

07:25-12:40

1 stop4h 15m

Denver Intl

Tue 6/10

18:55-22:05

1 stop4h 10m

£146

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Sat 22/8

13:55-19:35

1 stop4h 40m

Denver Intl

Sun 23/8

18:35-21:50

1 stop4h 15m

£217

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 12/8

08:45-14:10

1 stop4h 25m

Denver Intl

Sat 15/8

13:35-18:50

2 stops6h 15m

£299

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 9/9

13:36-20:05

1 stop5h 29m

Denver Intl

Mon 14/9

10:45-19:13

2 stops9h 28m

£590

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Sat 29/8

09:46-15:02

1 stop4h 16m

Denver Intl

Sun 30/8

18:28-23:54

2 stops6h 26m

£590

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 30/9

13:36-19:40

1 stop5h 04m

Denver Intl

Sat 3/10

10:45-19:04

2 stops9h 19m

£595

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 9/9

09:46-17:02

1 stop6h 16m

Denver Intl

Wed 16/9

10:45-19:13

2 stops9h 28m

£610

Flights are sorted by cheapest return flights first.

Deals found on 27/7

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from San Diego to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from San Diego 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 San Diego to Denver

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

The best time to book flights from San Diego to Denver is 62 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, February is the cheapest month in which you can book a flight from San Diego to Denver (average of £96). Flying from San Diego to Denver in June is currently the most expensive (average of £207). 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 SAN to DEN?

Find hourly flight availability from San Diego to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 1 August 2026.

When flying from San Diego to Denver, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 76% versus a flight in the morning.

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

Airfare is below average for this route at the moment.

San Diego to Denver flights typically cost between £118 and £201 in September.
The cheapest return price found within the last 5 days was £113 on Southwest (18 Sept–26 Sept).

Related info for your journey

Find useful and relevant information for your journey from San Diego to Denver. 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 San Diego to Denver flight route?

    The San Diego to Denver Intl flight path 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 San Diego to Denver?

    A quick flight from San Diego to Denver can take about 4h 25m. Southwest provides one of the quickest options available for as low as £117. There are 852 mi between San Diego and Denver. 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 San Diego to Denver?

    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 San Diego to Denver on time: Lufthansa (91%), United Airlines (89%), Air Canada (88%).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Diego to Denver 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 San Diego to Denver?

    Currently, February is the cheapest month in which you can book a flight from San Diego to Denver (average of £96). Flying from San Diego to Denver in June is currently the most expensive (average of £207). 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

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Fly with Cheapflights

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

Deals for San Diego to Denver flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from San Diego to Denver.

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

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

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Denver from San Diego today and book when prices fit your budget.

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