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Cheap flights from San Diego to Denver from £57

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 14/10. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
18 6月 — 25 6月1
1 adult

Cheapflights Tip: The best prices from San Diego to Denver Intl are usually found in January or February, booked 44 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap 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 13 6月 2025.

Round-trip from

£116

One-way from

£57

Popular in

March

Cheapest in

January

Average price

£173
United Airlines
  • United Airlines
  • 26/8-26/8
  • Nonstop
  • 4h 49m total
  • San Diego to Denver
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 14/10
  • Nonstop
  • 2h 28m total
  • San Diego to Denver
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£4 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2025
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Find flight deals from San Diego to Denver

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 13 6月 2025.

週二 26/807:00SAN - DEN
Nonstop2h 28mUnited Airlines
週二 26/816:08DEN - SAN
Nonstop2h 21mUnited Airlines
Deal found 11/6£116
週六 6/915:40SAN - DEN
Nonstop2h 25mSouthwest
週六 13/907:55DEN - SAN
1 stop6h 20mSouthwest
Deal found 12/6£123
週六 26/709:59SAN - DEN
1 stop7h 18mDelta
週六 2/805:30DEN - SAN
1 stop4h 08mDelta
Deal found 11/6£160
週三 8/1010:32SAN - DEN
Nonstop2h 28mAlaska Airlines
週三 15/1008:39DEN - SAN
1 stop5h 36mAlaska Airlines
Deal found 11/6£171
週一 15/1208:00SAN - DEN
Nonstop2h 19mHawaiian Airlines
週一 15/1212:30DEN - SAN
Nonstop2h 26mHawaiian Airlines
Deal found 11/6£180

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 13 6月 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

週二 26/8

07:00-10:28

Nonstop2h 28m

Denver Intl

週二 26/8

16:08-17:29

Nonstop2h 21m

£116

San DiegoDenver

SAN - DEN

SANDEN

San Diego

週六 6/9

15:40-19:05

Nonstop2h 25m

Denver Intl

週六 13/9

07:55-13:15

1 stop6h 20m

£123

San DiegoDenver

SAN - DEN

SANDEN

San Diego

週六 26/7

09:59-18:17

1 stop7h 18m

Denver Intl

週六 2/8

05:30-08:38

1 stop4h 08m

£160

San DiegoDenver

SAN - DEN

SANDEN

San Diego

週三 8/10

10:32-14:00

Nonstop2h 28m

Denver Intl

週三 15/10

08:39-13:15

1 stop5h 36m

£171

San DiegoDenver

SAN - DEN

SANDEN

San Diego

週五 17/10

20:19-23:47

Nonstop2h 28m

Denver Intl

週一 20/10

19:50-21:19

Nonstop2h 29m

£322

San DiegoDenver

SAN - DEN

SANDEN

San Diego

週二 14/10

20:19-23:47

Nonstop2h 28m

£57

San DiegoDenver

SAN - DEN

SANDEN

San Diego

週六 30/8

11:17-14:45

Nonstop2h 28m

£58

San DiegoDenver

SAN - DEN

SANDEN

San Diego

週六 16/8

12:30-19:30

1 stop6h 00m

£65

San DiegoDenver

SAN - DEN

SANDEN

San Diego

週日 12/10

14:30-17:52

Nonstop2h 22m

£72

San DiegoDenver

SAN - DEN

SANDEN

San Diego

週四 4/9

13:38-19:46

1 stop5h 08m

£80

Flights are sorted by cheapest return flights first.

Deals found on 12/6

Showing 1-10 of 11 results
1
2

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 9 June 2025.

The best time to book flights from San Diego to Denver is 44 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 £667). Flying from San Diego to Denver in July is currently the most expensive (average of £1,030). 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 13 6月 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 afternoon, which can drop the price by up to 75% versus a flight at midday.

Weekly flight availability from San Diego to Denver

Explore weekly flight availability from San Diego to Denver. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 13 6月 2025.

The most flights from SAN to DEN are scheduled on a Thursday (26 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (10 on average).

Rainfall in Denver by month

Plan your trip to Denver by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Denver ranges from 13.0 - 58.0 inches per month. May is typically the wettest month, when rainfall can reach 58.0 mm. January is typically the driest time to visit Denver when rainfall is around 13.0 mm.

Temperature in Denver by month

Plan your trip to Denver by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Denver, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated 13 6月 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from San Diego to Denver to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very Good
10,000 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very Good
4,287 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very Good
7,950 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,496 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What airports do I use to fly from San Diego to Denver?

    Denver Intl is the airport most travelers will use when flying to Denver from San Diego. Booking flights from San Diego (SAN) to Denver Intl (DEN) should be relatively easy as there are 20 daily flights to Denver from 1 airline. 2h 28m is how long a flight from San Diego to Denver Intl will take if you book a nonstop flight.

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

    The San Diego to Denver Intl flight path was viewed by 8 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines flying from San Diego to Denver round-trip?

    Our cheapest airline available from San Diego to Denver is United Airlines. Our recent data shows that you can find tickets from as low as £116 on this airline. Additional options worth looking into are Southwest and Delta, starting at £123 and £160 round-trip. United Airlines is 19% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from San Diego to Denver one-way?

    To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at £57. United Airlines flights start at £58 while deals on Southwest start at £65 one-way.

  • 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: Sun Country Air (100%), United Airlines (78%), Air Canada (77%).

  • 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 £667). Flying from San Diego to Denver in July is currently the most expensive (average of £1,030). 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
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.
San Francisco to Denver flights
Los Angeles to Denver flights
Ontario to Denver flights
Santa Ana to Denver flights

Top airline flying from San Diego to Denver

Discover the top airline that operate flights from San Diego to Denver. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 13 6月 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest£43Average£158FlexibilityNo cancel feeOn-time62%
Search Frontier flights

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 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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