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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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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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 September 11, 2025.

Round-trip from

$83
(Trip.com)

One-way from

$47
(Southwest)

Popular in

March

Cheapest in

January

Average price

$158

Good round-trip deal

$144 or less

Good one-way deal

$112 or less
From San Diego to Colorado
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One-way flight from San Diego to Colorado
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Highest demand for flights based on searches. 4% potential increase in price ($9 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from San Diego to Colorado.
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Price to beat on a one-way flight from San Diego to Colorado.
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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 September 11, 2025.

This Trip.com deal was found by Cheapflights users on 9/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/112:24 pmSAN - DEN
Nonstop2h 33mFrontier
Tue 10/1410:29 pmDEN - SAN
Nonstop2h 21mFrontier
Deal found 9/11$83
This Southwest deal was found by Cheapflights users on 9/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/148:15 pmSAN - DEN
Nonstop2h 35mSouthwest
Wed 10/294:55 pmDEN - SAN
1 stop4h 00mSouthwest
Deal found 9/10$84
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/146:41 amSAN - DEN
Nonstop2h 37mFrontier
Sun 11/1610:29 pmDEN - SAN
Nonstop2h 21mFrontier
Deal found 9/10$87
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/49:30 amSAN - DEN
Nonstop2h 25mSouthwest
Wed 10/88:10 amDEN - SAN
1 stop4h 45mSouthwest
Deal found 9/11$88
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/58:40 amSAN - DEN
1 stop3h 55mSouthwest
Tue 11/112:20 pmDEN - SAN
1 stop4h 35mSouthwest
Deal found 9/11$89
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/226:50 pmSAN - DEN
Nonstop2h 25mSouthwest
Thu 10/239:40 pmDEN - SAN
Nonstop2h 25mSouthwest
Deal found 9/11$90
This Southwest deal was found by Cheapflights users on 9/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/49:30 amSAN - DEN
Nonstop2h 25mSouthwest
Sat 10/183:20 pmDEN - SAN
1 stop5h 35mSouthwest
Deal found 9/10$92
This Orbitz deal was found by Cheapflights users on 9/9. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/146:41 amSAN - DEN
Nonstop2h 37mMultiple Airlines
Wed 10/157:50 pmDEN - SAN
Nonstop2h 29mMultiple Airlines
Deal found 9/9$94
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1710:30 amSAN - DEN
1 stop4h 25mSouthwest
Wed 11/193:55 pmDEN - SAN
Nonstop2h 25mSouthwest
Deal found 9/11$95
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/96:41 amSAN - DEN
Nonstop2h 37mFrontier
Mon 10/1310:29 pmDEN - SAN
Nonstop2h 21mFrontier
Deal found 9/10$96
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/237:15 amSAN - DEN
Nonstop2h 35mFrontier
Tue 10/710:29 pmDEN - SAN
Nonstop2h 21mFrontier
Deal found 9/10$97
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/111:30 amSAN - COS
Nonstop2h 25mSouthwest
Tue 11/45:10 pmCOS - SAN
1 stop6h 15mSouthwest
Deal found 9/11$190

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 September 11, 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

Wed 11/5

4:50 pm-9:35 pm

1 stop3h 45m

Denver Intl

Sat 11/8

6:50 pm-8:15 pm

Nonstop2h 25m

$84

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 11/5

8:40 am-1:35 pm

1 stop3h 55m

Denver Intl

Tue 11/11

2:20 pm-5:55 pm

1 stop4h 35m

$89

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Tue 10/14

5:10 pm-10:25 pm

1 stop4h 15m

Denver Intl

Wed 10/29

8:10 am-11:55 am

1 stop4h 45m

$93

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Thu 11/13

5:35 pm-10:35 pm

1 stop4h 00m

Denver Intl

Wed 11/19

7:00 am-8:35 am

Nonstop2h 35m

$95

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 11/19

2:24 pm-5:57 pm

Nonstop2h 33m

Denver Intl

Wed 11/26

6:20 am-8:01 am

Nonstop2h 41m

$99

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Fri 11/14

8:00 pm-11:25 pm

Nonstop2h 25m

Denver Intl

Sat 11/15

6:50 pm-8:15 pm

Nonstop2h 25m

$99

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Thu 11/13

7:45 am-11:10 am

Nonstop2h 25m

Denver Intl

Sat 11/15

2:45 pm-5:50 pm

1 stop4h 05m

$99

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Mon 11/17

4:50 pm-9:35 pm

1 stop3h 45m

Denver Intl

Wed 11/19

1:30 pm-4:55 pm

1 stop4h 25m

$100

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 10/1

12:35 pm-4:00 pm

Nonstop2h 25m

Denver Intl

Wed 10/15

8:10 am-11:55 am

1 stop4h 45m

$105

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Sun 10/5

9:03 pm-12:38 am

Nonstop2h 35m

Denver Intl

Thu 10/9

7:01 am-8:25 am

Nonstop2h 24m

$108

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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, October is the cheapest month in which you can book a flight from San Diego to Colorado (average of $197). Flying from San Diego to Colorado in March is currently the most expensive (average of $278). 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 September 11, 2025.

When flying from San Diego to Colorado, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 11, 2025.

The most flights from SAN to USCO are scheduled on a Thursday (30 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 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 September 11, 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
10,000 reviews

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

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
4,248 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

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
8,937 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

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
3,177 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

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 170 times in the past calendar month.

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

    Airlines like Southwest, Frontier, and United Airlines fly from San Diego to Colorado in about 2h 33m. The time it takes to get you to your destination can typically vary by up to 4h 08m. 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 Southwest, with whom users have recently found tickets for as low as $47. However, be on the lookout for offers from American Airlines and United 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 - Aspen Pitkin 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 Frontier (83%), SWISS (77%) and Lufthansa (76%).

  • 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 $659, our data indicates the cheapest price to be $50. The most popular route (San Diego - Denver Intl), is priced around $74.

  • 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, October is the cheapest month in which you can book a flight from San Diego to Colorado (average of $197). Flying from San Diego to Colorado in March is currently the most expensive (average of $278). 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$67Average$119FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$78Average$232FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$137Average$340FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$149Average$366FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$166Average$448FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$197Average$372FlexibilityNo cancel feeOn-time71%
DeltaCheapest$206Average$357FlexibilityNo cancel feeOn-timeN/A

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