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$36+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
feb. 28 — mar. 71
sáb. 2/28
sáb. 3/7
1 adult, Economy
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Cheap 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 enero 29, 2026.

This Frontier deal was found by Cheapflights users on 1/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/106:25 am
SAN
-
DEN
Nonstop2h 35m
Frontier
mar. 3/1710:29 pm
DEN
-
SAN
Nonstop2h 39m
Frontier
Deal found 1/28$51
This Flightnetwork deal was found by Cheapflights users on 1/27. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/2812:23 pm
SAN
-
DEN
Nonstop2h 33m
Frontier
dom. 3/16:44 am
DEN
-
SAN
Nonstop2h 40m
Frontier
Deal found 1/27$52
This Trip.com deal was found by Cheapflights users on 1/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/247:11 am
SAN
-
DEN
Nonstop2h 31m
Frontier
jue. 2/2610:29 pm
DEN
-
SAN
Nonstop2h 39m
Frontier
Deal found 1/29$53
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
jue. 2/266:25 am
SAN
-
DEN
Nonstop2h 35m
Frontier
lun. 3/210:29 pm
DEN
-
SAN
Nonstop2h 39m
Frontier
Deal found 1/26$55
This Super.com deal was found by Cheapflights users on 1/28. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/309:18 pm
SAN
-
DEN
Nonstop2h 29m
Frontier
jue. 4/26:15 am
DEN
-
SAN
Nonstop2h 37m
Frontier
Deal found 1/28$56
This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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.
vie. 2/278:35 am
SAN
-
DEN
Nonstop2h 34m
Frontier
dom. 3/16:44 am
DEN
-
SAN
Nonstop2h 40m
Frontier
Deal found 1/27$57
This Trip.com deal was found by Cheapflights users on 1/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/127:15 am
SAN
-
DEN
Nonstop2h 35m
Frontier
mié. 5/139:30 pm
DEN
-
SAN
Nonstop2h 36m
Frontier
Deal found 1/29$58
This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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.
mié. 3/186:25 am
SAN
-
DEN
Nonstop2h 35m
Frontier
dom. 3/2210:29 pm
DEN
-
SAN
Nonstop2h 39m
Frontier
Deal found 1/27$61
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
vie. 2/68:16 pm
SAN
-
DEN
Nonstop2h 37m
Frontier
sáb. 3/710:29 pm
DEN
-
SAN
Nonstop2h 39m
Frontier
Deal found 1/28$62
This Super.com deal was found by Cheapflights users on 1/28. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 2/2611:59 am
SAN
-
DEN
Nonstop2h 29m
Frontier
jue. 3/59:30 am
DEN
-
SAN
Nonstop2h 44m
Frontier
Deal found 1/28$67
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
lun. 3/239:08 pm
SAN
-
DEN
Nonstop2h 29m
Frontier
sáb. 3/2810:29 pm
DEN
-
SAN
Nonstop2h 39m
Frontier
Deal found 1/26$69
This Super.com deal was found by Cheapflights users on 1/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/309:18 pm
SAN
-
DEN
Nonstop2h 29m
Frontier
sáb. 4/410:30 pm
DEN
-
SAN
Nonstop2h 32m
Frontier
Deal found 1/27$70

Find 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 enero 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$51
(Frontier)

One-way from

$36
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$156

Good round-trip deal

$156 or less

Good one-way deal

$110 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. 12% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 enero 29, 2026.
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

mar. 4/7

6:25 am-10:05 am

Nonstop2h 40m

Denver Intl

sáb. 4/11

10:30 pm-12:02 am

Nonstop2h 32m

$56

San DiegoDenver

SAN - DEN

SANDEN

San Diego

dom. 2/15

6:25 am-10:00 am

Nonstop2h 35m

Denver Intl

mié. 2/18

6:30 am-5:51 pm

1 stop12h 21m

$113

San DiegoDenver

SAN - DEN

SANDEN

San Diego

vie. 3/6

2:16 pm-5:48 pm

Nonstop2h 32m

Denver Intl

lun. 3/9

6:45 pm-8:27 pm

Nonstop2h 42m

$117

San DiegoDenver

SAN - DEN

SANDEN

San Diego

mar. 2/24

6:20 am-9:50 am

Nonstop2h 30m

Denver Intl

sáb. 2/28

6:55 am-8:40 am

Nonstop2h 45m

$117

San DiegoDenver

SAN - DEN

SANDEN

San Diego

jue. 4/2

6:32 am-10:09 am

Nonstop2h 37m

Denver Intl

dom. 4/5

7:45 am-9:16 am

Nonstop2h 31m

$117

San DiegoDenver

SAN - DEN

SANDEN

San Diego

vie. 3/6

2:16 pm-5:48 pm

Nonstop2h 32m

Denver Intl

mar. 3/10

1:10 pm-2:49 pm

Nonstop2h 39m

$117

San DiegoDenver

SAN - DEN

SANDEN

San Diego

vie. 4/3

8:42 am-12:20 pm

Nonstop2h 38m

Denver Intl

vie. 4/3

6:20 pm-7:58 pm

Nonstop2h 38m

$147

San DiegoDenver

SAN - DEN

SANDEN

San Diego

vie. 2/13

8:35 am-12:09 pm

Nonstop2h 34m

Denver Intl

lun. 3/16

10:29 pm-12:08 am

Nonstop2h 39m

$156

San DiegoColorado Springs

SAN - COS

SANCOS

San Diego

mié. 4/29

8:40 am-4:10 pm

1 stop6h 30m

Colorado Springs

sáb. 5/2

1:10 pm-4:25 pm

1 stop4h 15m

$177

San DiegoColorado Springs

SAN - COS

SANCOS

San Diego

lun. 3/2

6:35 am-3:40 pm

1 stop8h 05m

Colorado Springs

lun. 3/2

5:40 pm-9:45 pm

1 stop5h 05m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

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 $38). Flying from San Diego to Colorado in May is currently the most expensive (average of $70). 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 enero 29, 2026.

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 evening, which can drop the price by up to 52% versus a flight at noon.

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 January 24, 2026.

Travelers seeking maximum savings on their San Diego to Colorado flight should consider departing on Tuesday at noon 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 San Diego to Colorado

Explore weekly flight availability from San Diego to Colorado. 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 enero 29, 2026.

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

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 enero 29, 2026.
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
11,808 reviews

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,808 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Southwest
8.0
Very good
4,267 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
United Airlines
7.4
Good
9,215 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
American Airlines
7.2
Good
11,206 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Frontier
5.7
Fair
3,056 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

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 209 times in the past calendar month.

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

    Airlines like Frontier, Alaska Airlines, and Southwest fly from San Diego to Colorado in about 2h 30m. The time it takes to get you to your destination is usually consistent. San Diego and Colorado are separated by a distance of 852 mi. All flights are typically nonstop.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $30. However, be on the lookout for offers from Alaska Airlines and Hawaiian 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 - Aspen Pitkin County or San Diego - Colorado Springs 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 Air Canada (89%), United Airlines (86%) and Lufthansa (85%).

  • 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 $771, our data indicates the cheapest price to be $40. The most popular route (San Diego - Denver Intl), is priced around $56.

  • 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 $38). Flying from San Diego to Colorado in May is currently the most expensive (average of $70). 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 enero 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$55Average$156FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$68Average$167FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$102Average$348FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$117Average$360FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$131Average$400FlexibilityNo cancel feeOn-time69%
DeltaCheapest$215Average$365FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$218Average$386FlexibilityNo cancel feeOn-time71%

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