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Cheap flights from San Diego to Denver from £43

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 25/1. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
11 Jan — 18 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from San Diego to Denver Intl are usually found in January or October, booked 52 days in advance, depart on a Tuesday or Monday 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 December 2025.

Wed 31/1216:15SAN - DEN
1 stop5h 02mDelta
Tue 6/118:23DEN - SAN
1 stop5h 24mDelta
Deal found 10/12£147
Wed 31/1206:30SAN - DEN
1 stop4h 40mSouthwest
Sat 3/105:35DEN - SAN
1 stop5h 45mSouthwest
Deal found 10/12£173
Wed 31/1216:15SAN - DEN
1 stop5h 02mDelta
Sat 3/105:30DEN - SAN
1 stop4h 25mDelta
Deal found 10/12£184
Tue 30/1206:30SAN - DEN
Nonstop2h 31mUnited Airlines
Tue 6/107:45DEN - SAN
Nonstop2h 35mUnited Airlines
Deal found 11/12£192
Wed 31/1216:10SAN - DEN
Nonstop2h 30mUnited Airlines
Fri 2/108:05DEN - SAN
Nonstop2h 34mUnited Airlines
Deal found 10/12£199
Fri 26/1211:12SAN - DEN
1 stop7h 25mUnited Airlines
Thu 1/121:00DEN - SAN
Nonstop2h 32mUnited Airlines
Deal found 11/12£207
Thu 25/1213:30SAN - DEN
Nonstop2h 25mSouthwest
Thu 1/106:40DEN - SAN
Nonstop2h 35mSouthwest
Deal found 12/12£222
Sun 28/1219:40SAN - DEN
1 stop3h 55mSouthwest
Thu 1/106:40DEN - SAN
Nonstop2h 35mSouthwest
Deal found 12/12£226
Wed 31/1216:15SAN - DEN
1 stop5h 02mDelta
Fri 2/106:45DEN - SAN
1 stop9h 48mDelta
Deal found 10/12£240
Sun 28/1219:40SAN - DEN
1 stop3h 55mSouthwest
Sat 3/105:35DEN - SAN
1 stop4h 55mSouthwest
Deal found 10/12£248

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 December 2025.

Round-trip from

£43

Popular in

March

Cheapest in

January

Average price

£119
Frontier
  • Frontier
  • 25/1-1/2
  • Nonstop
  • 5h 18m total
  • San Diego to Denver
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£8 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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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 December 2025.
Use the filters below to find and compare flights from San Diego to Denver that are best for you.

Fly from

San Diego

Fly to

Denver

Route

Depart

Return

Price

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Thu 8/1

09:00-12:30

Nonstop2h 30m

Denver Intl

Sun 11/1

21:05-22:37

Nonstop2h 32m

£102

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 21/1

08:35-15:05

1 stop5h 30m

Denver Intl

Sat 24/1

18:50-20:20

Nonstop2h 30m

£110

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 14/1

13:45-23:25

1 stop8h 40m

Denver Intl

Fri 23/1

06:29-14:29

1 stop9h 00m

£138

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Sat 14/2

13:40-23:25

1 stop8h 45m

Denver Intl

Thu 19/2

06:40-14:29

1 stop8h 49m

£138

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Sun 15/2

15:15-22:37

1 stop6h 22m

Denver Intl

Tue 24/2

06:40-17:50

1 stop12h 10m

£143

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Sun 15/2

15:15-22:37

1 stop6h 22m

Denver Intl

Thu 19/2

18:12-23:04

1 stop5h 52m

£147

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Sun 15/2

15:15-22:37

1 stop6h 22m

Denver Intl

Sat 21/2

05:30-08:48

1 stop4h 18m

£147

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Tue 20/1

11:00-17:40

1 stop5h 40m

Denver Intl

Sat 24/1

07:55-13:30

2 stops6h 35m

£170

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 18/3

08:00-11:19

Nonstop2h 19m

Denver Intl

Sat 21/3

07:00-00:04

1 stop18h 04m

£173

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Mon 16/2

15:15-22:37

1 stop6h 22m

Denver Intl

Mon 23/2

06:40-17:50

1 stop12h 10m

£176

Flights are sorted by cheapest return flights first.

Deals found on 10/12

Showing 1-10 of 22 results
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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 5 December 2025.

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 £18). Flying from San Diego to Denver in October is currently the most expensive (average of £51). 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 December 2025.

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.

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 7 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. United Airlines provides one of the quickest options available for as low as £102. 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 (93%), Air Canada (91%), SkyWest Airlines (91%).

  • 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 £18). Flying from San Diego to Denver in October is currently the most expensive (average of £51). 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 Denver?

Book flights to Denver if you plan to visit one of these locations
Winter Park
Frisco

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Alternative routes for San Diego to Denver

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