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$49+ Cheap flights from Denver to San Diego (DEN - SAN)

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 3/16. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SAN
3月 3 — 3月 101
週一 3/3
週一 3/10
1 adult, Economy
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1. Tell us where you want to go
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The best prices from Denver Intl to San Diego are usually found in May or April, booked 61 days in advance, depart on a Saturday or Wednesday and return on a Saturday

Cheap flight deals from Denver to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to San Diego (SAN). 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 2月 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$108
(Cheapflightsfares)

One-way from

$49
(Cheapflightsfares)

Popular in

March

Cheapest in

May

Average price

$171

Good round-trip deal

$144 or less

Good one-way deal

$98 or less
Provider with most accurate pricing for Denver Intl-San Diego flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-San Diego flights.
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From Denver Intl to San Diego
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One-way flight from Denver Intl to San Diego
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Highest demand for flights based on searches. 0% potential increase in price ($0 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from Denver Intl to San Diego.
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Price to beat on a one-way flight from Denver Intl to San Diego.
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Find flight deals from Denver to San Diego

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 2月 26, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 2/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週日 3/166:15 amDEN - SAN
Nonstop2h 22mMultiple Airlines
週二 3/186:25 amSAN - DEN
Nonstop2h 31mMultiple Airlines
Deal found 2/26$108
This Cheapflightsfares deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週五 3/2110:43 pmDEN - SAN
Nonstop2h 37mFrontier
週三 3/266:55 amSAN - DEN
Nonstop2h 31mFrontier
Deal found 2/25$113
This United Airlines deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週三 4/93:58 pmDEN - SAN
1 stop5h 42mUnited Airlines
週六 4/127:09 amSAN - DEN
Nonstop2h 26mUnited Airlines
Deal found 2/25$155
This American Airlines deal was found by Cheapflights users on 2/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週六 5/1711:16 amDEN - SAN
1 stop5h 25mAmerican Airlines
週三 5/214:31 pmSAN - DEN
1 stop5h 04mAmerican Airlines
Deal found 2/26$169
This Southwest deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週五 4/119:45 pmDEN - SAN
Nonstop2h 25mSouthwest
週二 4/155:40 pmSAN - DEN
1 stop4h 05mSouthwest
Deal found 2/25$170
This Delta deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週五 4/116:55 amDEN - SAN
1 stop4h 16mDelta
週五 4/186:15 amSAN - DEN
1 stop4h 45mDelta
Deal found 2/25$217
This Alaska Airlines deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週一 4/286:37 pmDEN - SAN
2 stops14h 38mAlaska Airlines
週三 4/309:00 amSAN - DEN
1 stop7h 38mAlaska Airlines
Deal found 2/25$247

Find flights from Denver to San Diego within your budget

Customize your flight search to find flights from Denver to San Diego 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 2,558,603 searches. Data last updated 2月 26, 2025.

Fly from

Denver

Fly to

San Diego

Route

Depart

Return

Price

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

週日 3/16

6:15 am-7:37 am

Nonstop2h 22m

San Diego

週二 3/18

6:25 am-9:56 am

Nonstop2h 31m

$108

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

週五 3/21

10:43 pm-12:20 am

Nonstop2h 37m

San Diego

週三 3/26

6:55 am-10:26 am

Nonstop2h 31m

$113

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

週三 4/9

3:58 pm-8:40 pm

1 stop5h 42m

San Diego

週六 4/12

7:09 am-10:35 am

Nonstop2h 26m

$155

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

週六 5/17

11:16 am-3:41 pm

1 stop5h 25m

San Diego

週二 5/20

4:31 pm-10:35 pm

1 stop5h 04m

$169

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

週五 4/11

9:45 pm-11:10 pm

Nonstop2h 25m

San Diego

週二 4/15

5:40 pm-10:45 pm

1 stop4h 05m

$170

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

週五 4/11

6:55 am-10:11 am

1 stop4h 16m

San Diego

週五 4/18

6:15 am-12:00 pm

1 stop4h 45m

$217

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

週一 4/28

6:37 pm-8:15 am

2 stops14h 38m

San Diego

週三 4/30

9:00 am-5:38 pm

1 stop7h 38m

$247

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

週日 3/16

6:15 am-7:37 am

Nonstop2h 22m

$49

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

週二 5/6

10:43 pm-12:13 am

Nonstop2h 30m

$56

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

週二 4/29

6:25 am-7:50 am

Nonstop2h 25m

$75

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/26

Showing 1-10 of 16 results
1
2

Compare providers for flights from Denver to San Diego

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to San Diego in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*2 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
JustAirTicketPrice Accuracy-Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Denver-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-San Diego flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-San Diego flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-San Diego flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Denver to San Diego flights

Find out what our experts recommend to make the most of your Denver to San Diego trip
Airports
DEN

For a quick security experience at DEN, reserve a time online for general screening. It's available for all travelers, not just TSA PreCheck users.

Read more about DENby Emily Zemler
SAN

Use the free San Diego Flyer shuttle for easy transport between SAN and Old Town Transit Center. It's a convenient and cost-effective option.

Read more about SANby Blane Bachelor
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on SAN

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Emily Zemler

Emily Zemler

Expert on DEN

Emily Zemler

Emily Zemler

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.

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.
Estimated round-trip 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.

Travel insights for flights from Denver to San Diego

Get recent, data-driven insights about flights from Denver to San Diego including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a round-trip flight from Denver to San Diego. Price data was last updated on February 25, 2025.

Booking 61 days in advance of your planned departure date is, on average, the best time to get cheap flights from Denver to San Diego. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from Denver to San Diego (average of $286). Flying from Denver to San Diego in March is currently the most expensive (average of $366). 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 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 2月 26, 2025.

When flying from Denver to San Diego, 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 46% versus a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Denver to San Diego. Price data was last updated on February 23, 2025.

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

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 2月 26, 2025.

The most flights from DEN to SAN are scheduled on a Wednesday (25 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 San Diego by month

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

In terms of precipitation, rainfall in San Diego ranges from 0.0 - 2.3 inches per month. February is typically the wettest month, when rainfall can reach 2.3 in. July is typically the driest time to visit San Diego when rainfall is around 0.0 in.

Temperature in San Diego by month

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

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 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated 2月 26, 2025.
To help decide which airline to fly from Denver to San Diego, see what other customers have to say about Southwest, Alaska Airlines and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,369 reviews

Crew

8.7

Boarding

8.2

Entertainment

7.6

Food

7.1

Overall

8.1

Comfort

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Southwest
8.1
Very good
4,369 reviews
Southwest
8.1
Very good
4,369 reviews

Crew

8.7

Boarding

8.2

Entertainment

7.6

Food

7.1

Overall

8.1

Comfort

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Alaska Airlines
8.0
Very good
9,717 reviews
Southwest
8.1
Very good
4,369 reviews

Crew

8.7

Boarding

8.2

Entertainment

7.6

Food

7.1

Overall

8.1

Comfort

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Delta
8.0
Very good
8,151 reviews
Southwest
8.1
Very good
4,369 reviews

Crew

8.7

Boarding

8.2

Entertainment

7.6

Food

7.1

Overall

8.1

Comfort

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Hawaiian Airlines
7.9
Good
2,316 reviews
Southwest
8.1
Very good
4,369 reviews

Crew

8.7

Boarding

8.2

Entertainment

7.6

Food

7.1

Overall

8.1

Comfort

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

United Airlines
7.4
Good
8,732 reviews
Southwest
8.1
Very good
4,369 reviews

Crew

8.7

Boarding

8.2

Entertainment

7.6

Food

7.1

Overall

8.1

Comfort

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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.

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

    San Diego is the airport most travelers will use when flying to San Diego from Denver Intl. Booking flights from Denver Intl (DEN) to San Diego (SAN) should be relatively easy as there are 17 daily flights to San Diego from 5 different airlines. 2h 22m is how long a flight from Denver to San Diego will take if you book a nonstop flight.

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

    Within the past month, 147 users have taken a look at flights from Denver Intl to San Diego.

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

    According to our current data, Frontier ($113), United Airlines ($155), and American Airlines ($169) offers the cheapest pricing from Denver to San Diego. Frontier is 35% cheaper than the average price of flights available within the next 90 days to this destination.

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

    To fly one-way, consider booking your trip with Sun Country Air, which is currently one of the cheapest options available, starting at $49. Frontier flights start at $56 while deals on United Airlines start at $80 one-way.

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

    The top 3 most reliable airlines when flying from Denver to San Diego are Air Canada (82%), United Airlines (80%) and Frontier (78%).

  • What are the cheapest flights from Denver to San Diego?

    Looking for the cheapest flight from Denver to San Diego? While on average our users pay $301, our data indicates the cheapest price to be $39. The most popular route (Denver Intl - San Diego), is priced around $108.

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

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

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

    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.

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

    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.

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

    Currently, August is the cheapest month in which you can book a flight from Denver to San Diego (average of $286). Flying from Denver to San Diego in March is currently the most expensive (average of $366). 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

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
El Cajon
Chula Vista
Lemon Grove
National City
Imperial Beach
La Mesa
Alpine
Poway
Santee
Coronado
Borrego Springs

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Alternative routes for Denver to San Diego

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Top 5 airlines flying from Denver to San Diego

Discover the top 5 airlines that operate flights from Denver to San Diego. 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 2,558,603 searches. Data last updated 2月 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$140FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$156Average$306FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$168Average$274FlexibilityNo cancel feeOn-time63%
DeltaCheapest$196Average$286FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$197Average$281FlexibilityNo cancel feeOn-time71%
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