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$47+ Cheap flights from San Diego (SAN) to Colorado

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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Find flight deals from San Diego to Colorado

Cheapest flights from San Diego to Colorado
Explore the most affordable flight options available from San Diego to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 29, 2025.

This eDestinos deal was found by Cheapflights users on 10/27. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1110:57 amSAN - DEN
1 stop6h 11mFrontier
Thu 12/185:43 pmDEN - SAN
Nonstop2h 32mFrontier
Deal found 10/27$76
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/204:47 pmSAN - DEN
Nonstop2h 33mFrontier
Wed 12/2410:29 pmDEN - SAN
Nonstop2h 30mFrontier
Deal found 10/27$77
This Frontier deal was found by Cheapflights users on 10/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:25 amSAN - DEN
Nonstop2h 38mFrontier
Tue 1/69:15 pmDEN - SAN
Nonstop2h 31mFrontier
Deal found 10/29$78
This Cheapflightsfares deal was found by Cheapflights users on 10/27. 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.
Fri 12/264:47 pmSAN - DEN
Nonstop2h 33mFrontier
Mon 12/2910:29 pmDEN - SAN
Nonstop2h 30mFrontier
Deal found 10/27$81
This Frontier deal was found by Cheapflights users on 10/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/139:14 amSAN - DEN
1 stop4h 27mFrontier
Tue 11/1810:35 amDEN - SAN
Nonstop2h 32mFrontier
Deal found 10/27$82
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:52 amSAN - DEN
1 stop7h 16mFrontier
Thu 1/110:29 pmDEN - SAN
Nonstop2h 30mFrontier
Deal found 10/27$87
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/106:25 amSAN - DEN
1 stop25h 30mFrontier
Thu 12/185:43 pmDEN - SAN
Nonstop2h 32mFrontier
Deal found 10/28$89
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/264:47 pmSAN - DEN
Nonstop2h 33mFrontier
Tue 12/3010:29 pmDEN - SAN
Nonstop2h 30mFrontier
Deal found 10/28$92
This Expedia deal was found by Cheapflights users on 10/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/104:02 pmSAN - DEN
Nonstop2h 22mMultiple Airlines
Thu 12/1810:29 pmDEN - SAN
Nonstop2h 30mMultiple Airlines
Deal found 10/28$93
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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.
Tue 11/116:58 amSAN - DEN
Nonstop2h 37mFrontier
Tue 11/188:04 pmDEN - SAN
Nonstop2h 35mFrontier
Deal found 10/28$97
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/248:39 amSAN - DEN
1 stop14h 25mFrontier
Mon 12/16:20 amDEN - SAN
Nonstop2h 41mFrontier
Deal found 10/26$100
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Wed 11/1212:43 pmSAN - DRO
1 stop6h 51mUnited Airlines
Sun 11/165:15 amDRO - SAN
1 stop4h 59mUnited Airlines
Deal found 10/27$200

Cheap flight deals from San Diego to Colorado

Keep the following information in mind while searching for San Diego to Colorado flight deals. Data was last updated October 29, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$76
(eDestinos)

One-way from

$47
(Frontier)

Popular in

March

Cheapest in

January

Average price

$163

Good round-trip deal

$164 or less

Good one-way deal

$98 or less
Provider with most accurate pricing for San Diego-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Diego-Denver Intl flights.
Search Deals
From San Diego to Colorado
Search Deals
One-way flight from San Diego to Colorado
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($12 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from San Diego to Colorado.
Search Deals
Price to beat on a one-way flight from San Diego to Colorado.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Diego to Colorado 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 October 29, 2025.
Use the filters below to find and compare flights from San Diego to Colorado that are best for you.

Fly from

San Diego

Fly to

Colorado

Route

Depart

Return

Price

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Mon 12/29

8:14 pm-11:59 pm

Nonstop2h 45m

Denver Intl

Tue 1/6

12:47 pm-2:40 pm

Nonstop2h 53m

$117

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 2/11

8:10 pm-11:59 pm

Nonstop2h 49m

Denver Intl

Sun 2/15

7:04 pm-8:27 pm

Nonstop2h 23m

$117

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Sun 2/22

3:15 pm-6:33 pm

Nonstop2h 18m

Denver Intl

Thu 2/26

7:04 pm-8:27 pm

Nonstop2h 23m

$117

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Tue 11/18

8:15 am-11:34 am

Nonstop2h 19m

Denver Intl

Sun 11/23

6:00 am-7:34 am

Nonstop2h 34m

$117

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Thu 1/29

10:30 am-3:50 pm

1 stop4h 20m

Denver Intl

Tue 2/3

1:10 pm-4:45 pm

1 stop4h 35m

$127

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Sun 2/22

6:55 am-12:35 pm

1 stop4h 40m

Denver Intl

Thu 2/26

3:40 pm-5:10 pm

Nonstop2h 30m

$127

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Thu 11/20

4:00 pm-9:35 pm

1 stop4h 35m

Denver Intl

Sun 11/23

5:40 am-7:15 am

Nonstop2h 35m

$127

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Tue 12/30

8:50 pm-12:15 am

Nonstop2h 25m

Denver Intl

Sun 1/4

5:40 am-9:00 am

1 stop4h 20m

$127

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Thu 1/1

6:30 am-12:10 pm

1 stop4h 40m

Denver Intl

Sun 1/4

5:40 am-9:00 am

1 stop4h 20m

$132

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Mon 12/29

8:14 pm-11:59 pm

Nonstop2h 45m

Denver Intl

Sat 1/3

6:48 pm-8:28 pm

Nonstop2h 40m

$147

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 60 results
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Best time to book a flight from San Diego to Colorado

Have a flexible travel schedule? Discover the best time to fly to Colorado from San Diego 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.

Cheapflights Insights

Everything you need to know about your flight from San Diego to Colorado

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

Currently, January is the cheapest month in which you can book a flight from San Diego to Colorado (average of $24). Flying from San Diego to Colorado in October is currently the most expensive (average of $67). 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 CO?

Find hourly flight availability from San Diego to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 29, 2025.

When flying from San Diego to Colorado, 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 16% versus a flight in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from San Diego to Colorado. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their San Diego to Colorado flight should consider departing on Friday afternoons 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.

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. 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 Colorado. Reviews last updated October 29, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and United Airlines from San Diego to Colorado by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,206 reviews

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
11,206 reviews
Alaska Airlines
8.0
Very good
11,206 reviews

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Southwest
8.0
Very good
4,241 reviews
Alaska Airlines
8.0
Very good
11,206 reviews

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
9,001 reviews
Alaska Airlines
8.0
Very good
11,206 reviews

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
American Airlines
7.2
Good
11,032 reviews
Alaska Airlines
8.0
Very good
11,206 reviews

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Frontier
5.8
Fair
3,124 reviews
Alaska Airlines
8.0
Very good
11,206 reviews

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

Find useful and relevant information for your journey from San Diego to Colorado. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from San Diego to Colorado?

    If you book a flight to Colorado from San Diego, you will be flying from San Diego, which is the city’s only airport. San Diego (SAN) is located 2.6 mi from the center of San Diego.

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

    Flights from San Diego to Colorado have been viewed 205 times in the past calendar month.

  • How long is the flight from San Diego to Colorado?

    Airlines like Alaska Airlines, Southwest, and United Airlines fly from San Diego to Colorado in about 2h 45m. The time it takes to get you to your destination can typically vary by up to 7h 11m. San Diego and Colorado are separated by a distance of 852 mi. This flight may include one or multiple stops.

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

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $59. However, be on the lookout for offers from United Airlines and American Airlines, as they are both options that can get you from San Diego to Colorado for a low price.

  • What are the most popular routes from San Diego to Colorado?

    Most travelers choose San Diego - Denver Intl, San Diego - Colorado Springs or San Diego - Hayden Yampa Valley when deciding on the best route from San Diego to Colorado.

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

    The top 3 most reliable airlines when flying from San Diego to Colorado are SWISS (93%), Alaska Airlines (91%) and Hawaiian Airlines (91%).

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

    Looking for the cheapest flight from San Diego to Colorado? While on average our users pay $798, our data indicates the cheapest price to be $48. The most popular route (San Diego - Denver Intl), is priced around $83.

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

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

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Colorado.

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

    Yes. Cheapflights offers flight deals from San Diego to Colorado 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 Colorado?

    Currently, January is the cheapest month in which you can book a flight from San Diego to Colorado (average of $24). Flying from San Diego to Colorado in October is currently the most expensive (average of $67). 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

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Alternative routes for San Diego to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from San Diego to Colorado

Discover the top 7 airlines that operate flights from San Diego to Colorado. 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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$68Average$119FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$68Average$192FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$101Average$326FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$128Average$364FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$150Average$435FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$218Average$389FlexibilityNo cancel feeOn-time71%
DeltaCheapest$228Average$395FlexibilityNo cancel feeOn-timeN/A

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