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Cheap flights from San Diego to Denver from £40

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 23/3. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
11 Apr — 18 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Diego to Denver Intl are usually found in February or December, booked 39 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 12 March 2026.

Wed 6/507:55
SAN
-
DEN
Nonstop2h 25m
Southwest
Wed 6/514:20
DEN
-
SAN
1 stop4h 25m
Southwest
Deal found 10/3£72
Mon 4/506:30
SAN
-
DEN
Nonstop2h 25m
Southwest
Wed 6/514:20
DEN
-
SAN
1 stop4h 25m
Southwest
Deal found 11/3£82
Sat 2/514:55
SAN
-
DEN
Nonstop2h 25m
Southwest
Sun 3/512:25
DEN
-
SAN
1 stop4h 20m
Southwest
Deal found 11/3£85
Thu 2/413:48
SAN
-
DEN
Nonstop2h 36m
Alaska Airlines
Mon 6/418:20
DEN
-
SAN
Nonstop2h 38m
Alaska Airlines
Deal found 10/3£87
Wed 15/413:35
SAN
-
DEN
1 stop5h 25m
Southwest
Wed 22/414:20
DEN
-
SAN
1 stop4h 25m
Southwest
Deal found 11/3£89
Wed 1/419:45
SAN
-
DEN
1 stop4h 00m
Southwest
Wed 8/417:15
DEN
-
SAN
Nonstop2h 25m
Southwest
Deal found 11/3£92
Sat 4/419:20
SAN
-
DEN
1 stop4h 20m
Southwest
Mon 6/405:35
DEN
-
SAN
Nonstop2h 40m
Southwest
Deal found 10/3£95

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 12 March 2026.

Round-trip from

£72

One-way from

£40

Popular in

June

Cheapest in

February

Average price

£147
Southwest
  • Southwest
  • 6/5-6/5
  • 1 total stop
  • 6h 50m total
  • San Diego to Denver
Search Deals
Frontier
  • Frontier
  • 23/3
  • Nonstop
  • 2h 29m total
  • San Diego to Denver
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£16 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
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 12 March 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

Mon 6/4

19:50-23:20

Nonstop2h 30m

Denver Intl

Mon 13/4

19:40-22:30

1 stop3h 50m

£92

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 1/4

19:45-00:45

1 stop4h 00m

Denver Intl

Sat 4/4

05:25-07:05

Nonstop2h 40m

£92

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 8/4

06:30-12:20

1 stop4h 50m

Denver Intl

Tue 14/4

08:55-12:40

1 stop4h 45m

£98

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 22/4

08:35-15:05

1 stop5h 30m

Denver Intl

Mon 27/4

17:10-19:55

1 stop3h 45m

£98

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Tue 21/4

15:05-21:30

1 stop5h 25m

Denver Intl

Fri 24/4

17:10-19:55

1 stop3h 45m

£98

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Fri 17/4

17:55-22:55

1 stop4h 00m

Denver Intl

Mon 20/4

17:10-19:55

1 stop3h 45m

£98

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Sat 4/4

19:20-00:40

1 stop4h 20m

Denver Intl

Mon 6/4

05:30-08:40

1 stop4h 10m

£102

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 29/4

08:40-15:05

2 stops5h 25m

Denver Intl

Sun 3/5

12:25-15:45

1 stop4h 20m

£106

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 13/5

08:40-15:05

2 stops5h 25m

Denver Intl

Sun 17/5

20:35-23:25

1 stop3h 50m

£184

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 22/4

08:40-15:05

2 stops5h 25m

Denver Intl

Fri 24/4

20:10-23:05

1 stop3h 55m

£191

Flights are sorted by cheapest return flights first.

Deals found on 9/3

Showing 1-10 of 23 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?

Use this chart to determine the optimal time to book a return flight from San Diego to Denver. Price data was last updated on 6 March 2026.

The best time to book flights from San Diego to Denver is 39 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, January is the cheapest month in which you can book a flight from San Diego to Denver (average of £28). Flying from San Diego to Denver in May is currently the most expensive (average of £52). 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 12 March 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 94% versus a flight at midday.

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

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 6 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 2h 30m. Southwest provides one of the quickest options available for as low as £92. There are 852 mi between San Diego and Denver. Most flights are nonstop.

  • 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: SkyWest Airlines (94%), Alaska Airlines (90%), United Airlines (89%).

  • 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, January is the cheapest month in which you can book a flight from San Diego to Denver (average of £28). Flying from San Diego to Denver in May is currently the most expensive (average of £52). 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

Browse thousands of different options on Cheapflights for your next trip

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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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