HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Colorado

$38+ 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 1/1. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
ene. 11 — ene. 181
dom. 1/11
dom. 1/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Diego to Colorado with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 diciembre 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/11. 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.
mar. 12/309:14 pmSAN - DEN
1 stop10h 41mFrontier
mar. 1/69:45 pmDEN - SAN
Nonstop2h 31mFrontier
Deal found 12/11$106
This Frontier deal was found by Cheapflights users on 12/10. 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.
mié. 12/316:25 amSAN - DEN
Nonstop2h 38mFrontier
mar. 1/61:02 pmDEN - SAN
Nonstop2h 32mFrontier
Deal found 12/10$108
This Super.com deal was found by Cheapflights users on 12/9. 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.
mié. 12/314:47 pmSAN - DEN
Nonstop2h 33mFrontier
lun. 1/55:43 pmDEN - SAN
Nonstop2h 32mFrontier
Deal found 12/9$109
This Expedia deal was found by Cheapflights users on 12/11. 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.
lun. 12/292:10 pmSAN - DEN
1 stop9h 15mFrontier
jue. 1/89:18 amDEN - SAN
Nonstop2h 34mFrontier
Deal found 12/11$110
This Frontier deal was found by Cheapflights users on 12/10. 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.
mié. 12/314:47 pmSAN - DEN
Nonstop2h 33mFrontier
mié. 12/3110:29 pmDEN - SAN
Nonstop2h 30mFrontier
Deal found 12/10$113
This Super.com deal was found by Cheapflights users on 12/11. 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.
mié. 12/316:25 amSAN - DEN
Nonstop2h 38mFrontier
dom. 1/410:29 pmDEN - SAN
Nonstop2h 30mFrontier
Deal found 12/11$116
This Kiwi.com deal was found by Cheapflights users on 12/10. 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.
mar. 12/309:14 pmSAN - DEN
1 stop10h 41mFrontier
mié. 12/315:43 pmDEN - SAN
Nonstop2h 32mFrontier
Deal found 12/10$118
This Frontier deal was found by Cheapflights users on 12/8. 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.
lun. 12/292:10 pmSAN - DEN
1 stop9h 15mFrontier
mié. 12/315:43 pmDEN - SAN
Nonstop2h 32mFrontier
Deal found 12/8$120
This United Airlines deal was found by Cheapflights users on 12/9. 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.
mar. 12/239:00 amSAN - HDN
1 stop4h 28mUnited Airlines
lun. 12/293:25 pmHDN - SAN
1 stop6h 23mUnited Airlines
Deal found 12/9$211
This United Airlines deal was found by Cheapflights users on 12/10. 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.
jue. 12/256:15 amSAN - HDN
2 stops7h 13mUnited Airlines
lun. 12/293:25 pmHDN - SAN
1 stop6h 23mUnited Airlines
Deal found 12/10$216
This United Airlines deal was found by Cheapflights users on 12/9. 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.
jue. 12/256:15 amSAN - ASE
1 stop5h 54mUnited Airlines
vie. 1/93:00 pmASE - SAN
1 stop5h 54mUnited Airlines
Deal found 12/9$240
This American Airlines deal was found by Cheapflights users on 12/9. 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.
mié. 12/176:30 amSAN - DRO
1 stop3h 51mAmerican Airlines
dom. 12/216:26 pmDRO - SAN
1 stop4h 14mAmerican Airlines
Deal found 12/9$248

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 diciembre 12, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$57
(Super.com)

One-way from

$38
(Kiwi.com)

Popular in

March

Cheapest in

January

Average price

$159

Good round-trip deal

$158 or less

Good one-way deal

$111 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. 8% potential increase in price ($15 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 December 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 diciembre 12, 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

vie. 2/27

6:25 am-10:03 am

Nonstop2h 38m

Denver Intl

lun. 3/2

10:30 pm-12:01 am

Nonstop2h 31m

$57

San DiegoDenver

SAN - DEN

SANDEN

San Diego

jue. 1/8

10:30 am-3:50 pm

1 stop4h 20m

Denver Intl

dom. 1/11

8:15 am-9:50 am

Nonstop2h 35m

$162

San DiegoDenver

SAN - DEN

SANDEN

San Diego

mié. 1/14

1:45 pm-11:25 pm

1 stop8h 40m

Denver Intl

vie. 1/23

6:29 am-2:29 pm

1 stop9h 00m

$185

San DiegoDurango

SAN - DRO

SANDRO

San Diego

jue. 1/8

9:00 am-4:55 pm

1 stop6h 55m

Durango La Plata County

jue. 1/15

6:00 pm-10:37 pm

1 stop5h 37m

$200

San DiegoDurango

SAN - DRO

SANDRO

San Diego

jue. 1/15

6:30 am-12:36 pm

1 stop5h 06m

Durango La Plata County

dom. 1/18

3:32 pm-8:42 pm

1 stop6h 10m

$200

San DiegoDurango

SAN - DRO

SANDRO

San Diego

mié. 3/4

9:00 am-4:56 pm

1 stop6h 56m

Durango La Plata County

sáb. 3/7

1:41 pm-5:26 pm

1 stop4h 45m

$200

San DiegoDurango

SAN - DRO

SANDRO

San Diego

vie. 1/16

6:30 am-2:57 pm

1 stop7h 27m

Durango La Plata County

dom. 1/18

7:00 am-2:52 pm

2 stops8h 52m

$206

San DiegoHayden

SAN - HDN

SANHDN

San Diego

mié. 1/7

1:00 pm-8:16 pm

1 stop6h 16m

Hayden Yampa Valley

mié. 1/14

3:27 pm-8:42 pm

1 stop6h 15m

$209

San DiegoHayden

SAN - HDN

SANHDN

San Diego

sáb. 2/28

6:30 am-2:28 pm

1 stop6h 58m

Hayden Yampa Valley

mié. 3/4

3:30 pm-8:51 pm

1 stop6h 21m

$209

San DiegoHayden

SAN - HDN

SANHDN

San Diego

dom. 1/11

11:08 am-4:13 pm

1 stop4h 05m

Hayden Yampa Valley

mié. 1/14

3:27 pm-8:42 pm

1 stop6h 15m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Showing 1-10 of 60 results
1
2
3
...
6

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 $68). 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 diciembre 12, 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 morning, which can drop the price by up to 12% 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 Tuesday 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.

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 diciembre 12, 2025.

The most flights from SAN to USCO are scheduled on a Thursday (36 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 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 diciembre 12, 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
11,431 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Alaska Airlines
8.0
Very good
11,431 reviews
Alaska Airlines
8.0
Very good
11,431 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Southwest
7.9
Good
4,252 reviews
Alaska Airlines
8.0
Very good
11,431 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
United Airlines
7.4
Good
9,095 reviews
Alaska Airlines
8.0
Very good
11,431 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
American Airlines
7.2
Good
11,049 reviews
Alaska Airlines
8.0
Very good
11,431 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Frontier
5.8
Fair
3,084 reviews
Alaska Airlines
8.0
Very good
11,431 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.

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 217 times in the past calendar month.

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

    Airlines like Frontier, Southwest, and Delta fly from San Diego to Colorado in about 2h 38m. The time it takes to get you to your destination can typically vary by up to 6h 02m. 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 Frontier, with whom users have recently found tickets for as low as $34. However, be on the lookout for offers from Hawaiian Airlines and Alaska 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 - Hayden Yampa Valley or San Diego - Vail Eagle County 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 Lufthansa (93%), Air Canada (91%) and SkyWest 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 $818, our data indicates the cheapest price to be $53. The most popular route (San Diego - Denver Intl), is priced around $58.

  • 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 $68). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Diego to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Los Angeles to Newark flights
Los Angeles to Dallas/Fort Worth flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Seattle flights
San Francisco to Las Vegas flights
Los Angeles to LaGuardia flights
Los Angeles to Honolulu flights
San Francisco to Los Angeles flights
San Francisco to Newark flights
San Francisco to Honolulu flights
Los Angeles to Fort Lauderdale flights
San Francisco to Ontario flights
Los Angeles to Miami flights
Los Angeles to Las Vegas flights
Los Angeles to Orlando flights
Los Angeles to O'Hare Intl flights
Ontario to Seattle flights
San Francisco to Dallas/Fort Worth flights
Ontario to San Francisco flights
Los Angeles to San Francisco flights
Los Angeles to Boston flights
Los Angeles to Hobby flights
Santa Ana to Las Vegas flights
Burbank to Las Vegas flights
San Francisco to LaGuardia flights
Ontario to Dallas/Fort Worth flights
Santa Ana to Dallas/Fort Worth flights
San Francisco to Santa Ana flights
San Francisco to Seattle flights
San Jose to Los Angeles flights
Los Angeles to George Bush Intcntl flights
Los Angeles to Denver flights
Los Angeles to Reagan-National flights
San Francisco to Kahului flights
Ontario to John F Kennedy Intl flights
San Jose to Las Vegas flights
Los Angeles to Kahului flights
Burbank to LaGuardia flights
Santa Ana to Seattle flights
San Francisco to Denver flights
Santa Ana to San Francisco flights
San Francisco to Miami flights
Los Angeles to Dulles Intl flights
San Francisco to Orlando flights
Los Angeles to San Jose flights
San Diego to John F Kennedy Intl flights
Los Angeles to Baltimore flights
Los Angeles to Salt Lake City flights
Los Angeles to Atlanta flights

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 diciembre 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$118FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$68Average$192FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$104Average$309FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$124Average$366FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$143Average$424FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$218Average$389FlexibilityNo cancel feeOn-time71%
DeltaCheapest$228Average$421FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.