Question 1

How popular is this Denver to San Diego flight route?

Accepted Answer

This flight path from Denver Intl to San Diego was viewed by 11 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

Question 2

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

Accepted Answer

Our cheapest airline available from Denver to San Diego is Southwest. Our recent data shows that you can find tickets from as low as £97 on this airline. Additional options worth looking into are United Airlines and Alaska Airlines, starting at £98 and £101 round-trip. Southwest is priced at 31% lower than the current average price of a flight leaving 3 months from now.

Question 3

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

Accepted Answer

The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as £62. However, be on the lookout for offers from Southwest and Alaska Airlines, as they are both options that can get you from Denver to San Diego for a low price.

Question 4

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

Accepted Answer

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 61 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Question 5

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

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from Denver to San Diego (average of £585). Flying from Denver to San Diego in July is currently the most expensive (average of £920). 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.

Question 6

What is the cheapest day to fly from Denver to San Diego?

Accepted Answer

Travellers seeking maximum savings on their Denver to San Diego flight should consider departing on Tuesday mornings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Question 7

Weekly flight availability from Denver to San Diego

Accepted Answer

The most flights from DEN to SAN are scheduled on a Tuesday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (12 on average).

Question 8

E

Accepted Answer

In terms of precipitation, rainfall in San Diego ranges from 0.0 - 58.0 inches per month. February is typically the wettest month, when rainfall can reach 58.0 mm. July is typically the driest time to visit San Diego when rainfall is around 0.0 mm.

Question 9

E

Accepted Answer

If weather is an important factor for your trip to San Diego, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 14.0 C).

Question 10

What are the cheapest flights from Denver to San Diego?

Accepted Answer

While on average a flight from Denver to San Diego is generally £50, our data shows the cheapest flight currently is £45. When looking at the most popular route, (Denver Intl - San Diego), you can expect to pay £87 for that flight.

Question 11

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

Accepted Answer

Before booking your flight to San Diego from Denver, check out the most reliable airlines to get you to your destination on time: Air Canada (78%), Lufthansa (74%), United Airlines( 74%).

Question 12

What is the cheapest day to fly round-trip from Denver to San Diego?

Accepted Answer

Departing on a Monday is a good option for securing a great price. You can expect to save up to 169% when planning your travel around this day of the week.

Question 13

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

Accepted Answer

Find a great deal and save up to 72% by booking at least 36 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Denver to San Diego within the next two weeks, with the cheapest ticket starting at £136.

Question 14

What is the cheapest month to fly from Denver to San Diego?

Accepted Answer

Flights from Denver to San Diego lean towards being more expensive in March. Prices are generally better when you fly from Denver to San Diego in September, with the cheapest ticket starting at £37.

Question 15

What is the cheapest time of day to fly from DEN to SAN?

Accepted Answer

A simple way to save on the total cost of your ticket is to fly from Denver to San Diego in the morning. If you’re flexible enough to do this you can expect to save up to 63% on your trip compared to booking a flight at midday.

Question 16

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

Accepted Answer

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

Question 17

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

Accepted Answer

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.

Question 18

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

Accepted Answer

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.

Question 19

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

Accepted Answer

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.

Question 20

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

Accepted Answer

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.

Question 21

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

Accepted Answer

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

Question 22

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

Accepted Answer

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.

Round-trip from	£97
One-way from	£62
Popular in	March
Cheapest in	September
Average price	£146
Good round-trip deal	£46 or less

Cheap flights from Denver to San Diego from £62

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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Denver Intl to San Diego are usually found in September or February, booked 61 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from Denver to San Diego

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Find flight deals from Denver to San Diego

Cheapest flights from Denver to San DiegoExplore 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 8 July 2025.

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 8 July 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Denver to San Diego that are best for you.

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.

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?

Use this chart to determine the optimal time to book a return flight from Denver to San Diego. Price data was last updated on 27 June 2025.

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

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 8 July 2025.

Weekly flight availability from Denver to San Diego

Explore weekly flight availability from Denver to San Diego. 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 8 July 2025.

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

Reviews of airlines servicing San Diego

Read through reviews of airlines operating flights from Denver to San Diego, such as Alaska Airlines, Southwest, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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

What are the cheapest flights from Denver to San Diego?

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

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

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

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

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

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

Can Cheapflights 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?

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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 8 July 2025.