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$39+ Cheap flights from Colorado to San Diego (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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SAN
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from Colorado to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Colorado (USCO) 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 January 21, 2025.

Round-trip from

$68
(Frontier)

One-way from

$39
(Cheapflightsfares)
From Colorado to San Diego
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One-way flight from Colorado to San Diego
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Find flight deals from Colorado to San Diego

Cheapest flights from Colorado to San Diego
Explore the most affordable flight options available from Colorado to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This Frontier deal was found by Cheapflights users on 1/20. 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.
Wed 2/1910:05 amDEN - SAN
Nonstop2h 43mFrontier
Thu 2/204:06 pmSAN - DEN
Nonstop2h 27mFrontier
Deal found 1/20$68
This Frontier deal was found by Cheapflights users on 1/20. 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.
Sun 2/23:28 pmEGE - SAN
1 stop9h 24mFrontier
Sun 2/96:25 amSAN - EGE
1 stop7h 13mFrontier
Deal found 1/20$68
This United Airlines deal was found by Cheapflights users on 1/19. 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 2/1910:15 amDEN - SAN
1 stop5h 44mUnited Airlines
Tue 2/256:15 amSAN - DEN
1 stop5h 04mUnited Airlines
Deal found 1/19$172
This eDestinos deal was found by Cheapflights users on 1/20. 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.
Fri 1/3110:15 pmDEN - SAN
1 stop12h 02mMultiple Airlines
Sun 2/28:01 pmSAN - DEN
1 stop27h 42mMultiple Airlines
Deal found 1/20$182
This Delta deal was found by Cheapflights users on 1/20. 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.
Wed 2/196:25 amDEN - SAN
1 stop8h 59mDelta
Thu 2/273:20 pmSAN - DEN
1 stop7h 22mDelta
Deal found 1/20$203
This Delta deal was found by Cheapflights users on 1/20. 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.
Tue 2/258:20 amCOS - SAN
1 stop5h 09mDelta
Thu 2/277:20 amSAN - COS
2 stops10h 30mDelta
Deal found 1/20$266
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Thu 2/276:00 amDRO - SAN
1 stop3h 54mAmerican Airlines
Tue 3/410:20 amSAN - DRO
1 stop3h 31mAmerican Airlines
Deal found 1/20$278
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Fri 2/285:56 pmDRO - SAN
1 stop5h 44mUnited Airlines
Mon 3/310:59 amSAN - DRO
2 stops8h 46mUnited Airlines
Deal found 1/20$284
This Delta deal was found by Cheapflights users on 1/21. 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.
Sat 2/226:00 amGJT - SAN
1 stop4h 10mDelta
Sat 3/15:14 pmSAN - GJT
1 stop4h 21mDelta
Deal found 1/21$289
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Thu 2/135:30 amGJT - SAN
1 stop4h 59mUnited Airlines
Tue 2/186:15 amSAN - GJT
2 stops7h 20mUnited Airlines
Deal found 1/20$294
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Tue 2/411:38 amCOS - SAN
1 stop6h 47mUnited Airlines
Sat 2/88:35 amSAN - COS
1 stop6h 58mUnited Airlines
Deal found 1/20$297
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Tue 2/410:21 amCOS - SAN
2 stops9h 11mAmerican Airlines
Sat 2/812:16 pmSAN - COS
2 stops9h 19mAmerican Airlines
Deal found 1/20$307

Find flights from Colorado to San Diego within your budget

Customize your flight search to find flights from Colorado 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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

Sat 2/22

10:05 am-11:48 am

Nonstop2h 43m

San Diego

Wed 2/26

12:48 pm-4:16 pm

Nonstop2h 28m

$68

VailSan Diego

EGE - SAN

EGESAN

Vail Eagle County

Sun 2/2

3:28 pm-11:52 pm

1 stop9h 24m

San Diego

Sun 2/9

6:25 am-2:38 pm

1 stop7h 13m

$68

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

Wed 2/19

10:15 am-2:59 pm

1 stop5h 44m

San Diego

Tue 2/25

6:15 am-12:19 pm

1 stop5h 04m

$172

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

Fri 1/31

10:15 pm-9:17 am

1 stop12h 02m

San Diego

Sun 2/2

8:01 pm-12:43 am

1 stop27h 42m

$182

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

Wed 2/19

6:25 am-2:24 pm

1 stop8h 59m

San Diego

Wed 2/26

1:25 pm-12:17 am

1 stop9h 52m

$203

Colorado SpringsSan Diego

COS - SAN

COSSAN

Colorado Springs

Tue 2/25

8:20 am-12:29 pm

1 stop5h 09m

San Diego

Thu 2/27

7:20 am-6:50 pm

2 stops10h 30m

$266

DurangoSan Diego

DRO - SAN

DROSAN

Durango La Plata County

Thu 2/27

6:00 am-8:54 am

1 stop3h 54m

San Diego

Tue 3/4

10:20 am-2:51 pm

1 stop3h 31m

$278

DurangoSan Diego

DRO - SAN

DROSAN

Durango La Plata County

Fri 2/28

5:56 pm-10:40 pm

1 stop5h 44m

San Diego

Mon 3/3

10:59 am-8:45 pm

2 stops8h 46m

$284

Grand JunctionSan Diego

GJT - SAN

GJTSAN

Grand Junction Regnl

Sat 2/22

6:00 am-9:10 am

1 stop4h 10m

San Diego

Sat 3/1

5:14 pm-10:35 pm

1 stop4h 21m

$289

Grand JunctionSan Diego

GJT - SAN

GJTSAN

Grand Junction Regnl

Thu 2/13

5:30 am-9:29 am

1 stop4h 59m

San Diego

Tue 2/18

6:15 am-2:35 pm

2 stops7h 20m

$294

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 45 results
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Best time to book a flight from Colorado to San Diego

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

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

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

Currently, August is the cheapest month in which you can book a flight from Colorado to San Diego (average of $286). Flying from Colorado 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 CO to SAN?

Find hourly flight availability from Colorado 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 January 21, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to San Diego as you normally would.

Weekly flight availability from Colorado to San Diego

Explore weekly flight availability from Colorado 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 January 21, 2025.

The most flights from USCO to SAN are scheduled on a Monday (24 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (15 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 January 21, 2025.
See what other customers who have flown with Frontier, United Airlines and Delta from Colorado to San Diego have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
4,659 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,706 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
8,982 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Related info for your journey

Find useful and relevant information for your journey from Colorado 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 airport do you fly into for flights to San Diego from Colorado?

    San Diego (SAN), located 2.6 mi from the city center, is the airport you fly into when you book flights from Colorado to San Diego.

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

    This flight path from Colorado to San Diego was viewed by 145 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $39. United Airlines flights start at $84 while deals on American Airlines start at $100 one-way.

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

    While some choose either Colorado Springs - San Diego or Vail Eagle County - San Diego, Denver Intl - San Diego is the most popular route from Colorado to San Diego.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Colorado to San Diego on time: Frontier (85%), United Airlines (82%), Air Canada (79%).

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

    Looking for the cheapest flight from Colorado to San Diego? While on average our users pay $357, our data indicates the cheapest price to be $49. The most popular route (Denver Intl - San Diego), is priced around $77.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Colorado to San Diego (average of $286). Flying from Colorado 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 Colorado?

Book flights to Colorado 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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See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Colorado to San Diego

Discover the top 6 airlines that operate flights from Colorado 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$143FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$154Average$451FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$158Average$346FlexibilityNo cancel feeOn-time63%
DeltaCheapest$196Average$286FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$197Average$379FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$256Average$396FlexibilityNo cancel feeOn-time75%
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