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$40+ 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 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SAN
Feb 28 — Mar 71
Fri 2/28
Fri 3/7
1 adult, Economy
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Cheap flight deals from Colorado to San Diego

Keep the following information in mind while searching for Colorado to San Diego flight deals. Data was last updated February 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$83
(Frontier)

One-way from

$40
(Frontier)

Popular in

March

Cheapest in

May

Average price

$171

Good round-trip deal

$140 or less

Good one-way deal

$109 or less
Provider with most accurate pricing for Denver Intl-San Diego flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-San Diego flights.
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From Colorado to San Diego
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One-way flight from Colorado to San Diego
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Highest demand for flights based on searches. 1% potential increase in price ($1 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from Colorado to San Diego.
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Price to beat on a 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 February 23, 2025.

This Frontier deal was found by Cheapflights users on 2/22. 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 5/1410:43 pmDEN - SAN
Nonstop2h 30mFrontier
Sat 5/176:25 amSAN - DEN
Nonstop2h 31mFrontier
Deal found 2/22$83
This eDestinos deal was found by Cheapflights users on 2/22. 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.
Tue 4/810:49 pmDEN - SAN
1 stop9h 50mMultiple Airlines
Tue 4/1512:37 pmSAN - DEN
1 stop19h 16mMultiple Airlines
Deal found 2/22$168
This Mytrip deal was found by Cheapflights users on 2/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/15:03 pmEGE - SAN
1 stop28h 20mFrontier
Sat 3/812:48 pmSAN - EGE
1 stop23h 19mFrontier
Deal found 2/22$182
This Southwest deal was found by Cheapflights users on 2/22. 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.
Thu 4/39:40 pmDEN - SAN
Nonstop2h 30mSouthwest
Mon 4/77:55 pmSAN - DEN
Nonstop2h 20mSouthwest
Deal found 2/22$197
This Mytrip deal was found by Cheapflights users on 2/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/136:24 pmCOS - SAN
2 stops30h 10mMultiple Airlines
Wed 3/198:11 amSAN - COS
2 stops32h 28mMultiple Airlines
Deal found 2/21$211
This Delta deal was found by Cheapflights users on 2/22. 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 4/152:35 pmDEN - SAN
1 stop5h 06mDelta
Sat 4/196:15 amSAN - DEN
1 stop4h 45mDelta
Deal found 2/22$217
This Mytrip deal was found by Cheapflights users on 2/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/132:03 pmGJT - SAN
1 stop10h 31mMultiple Airlines
Sun 3/166:15 amSAN - GJT
1 stop6h 08mMultiple Airlines
Deal found 2/22$241
This Alaska Airlines deal was found by Cheapflights users on 2/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/115:08 pmDEN - SAN
2 stops15h 28mAlaska Airlines
Thu 3/136:15 amSAN - DEN
1 stop6h 39mAlaska Airlines
Deal found 2/22$252
This American Airlines deal was found by Cheapflights users on 2/22. 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.
Fri 5/1611:16 amDEN - SAN
1 stop5h 42mAmerican Airlines
Sat 5/174:48 pmSAN - DEN
1 stop4h 25mAmerican Airlines
Deal found 2/22$257
This United Airlines deal was found by Cheapflights users on 2/22. 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 3/1910:55 amCOS - SAN
1 stop5h 05mUnited Airlines
Mon 3/246:50 pmSAN - COS
1 stop4h 09mUnited Airlines
Deal found 2/22$257
This United Airlines deal was found by Cheapflights users on 2/22. 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.
Mon 3/317:58 amDEN - SAN
Nonstop2h 26mUnited Airlines
Thu 4/36:24 pmSAN - DEN
Nonstop2h 26mUnited Airlines
Deal found 2/22$274
This American Airlines deal was found by Cheapflights users on 2/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/74:44 pmCOS - SAN
1 stop8h 14mAmerican Airlines
Mon 3/102:48 pmSAN - COS
1 stop7h 59mAmerican Airlines
Deal found 2/21$277

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 February 23, 2025.

Fly from

Colorado

Fly to

San Diego

Route

Depart

Return

Price

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

Wed 5/14

10:43 pm-12:13 am

Nonstop2h 30m

San Diego

Sat 5/17

6:25 am-9:56 am

Nonstop2h 31m

$83

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

Tue 4/8

10:49 pm-7:39 am

1 stop9h 50m

San Diego

Tue 4/15

12:37 pm-8:53 am

1 stop19h 16m

$168

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

Thu 4/3

9:40 pm-11:10 pm

Nonstop2h 30m

San Diego

Mon 4/7

7:55 pm-11:15 pm

Nonstop2h 20m

$197

Colorado SpringsSan Diego

COS - SAN

COSSAN

Colorado Springs

Thu 3/13

6:24 pm-11:34 pm

2 stops30h 10m

San Diego

Wed 3/19

8:11 am-5:39 pm

2 stops32h 28m

$211

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

Tue 4/15

2:35 pm-6:41 pm

1 stop5h 06m

San Diego

Sat 4/19

6:15 am-12:00 pm

1 stop4h 45m

$217

Grand JunctionSan Diego

GJT - SAN

GJTSAN

Grand Junction Regnl

Thu 3/13

2:03 pm-11:34 pm

1 stop10h 31m

San Diego

Sun 3/16

6:15 am-1:23 pm

1 stop6h 08m

$241

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

Tue 3/11

5:08 pm-7:36 am

2 stops15h 28m

San Diego

Thu 3/13

6:15 am-1:54 pm

1 stop6h 39m

$252

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

Fri 5/16

11:16 am-3:58 pm

1 stop5h 42m

San Diego

Sat 5/17

4:48 pm-10:13 pm

1 stop4h 25m

$257

Colorado SpringsSan Diego

COS - SAN

COSSAN

Colorado Springs

Wed 3/19

10:55 am-3:00 pm

1 stop5h 05m

San Diego

Mon 3/24

6:50 pm-11:59 pm

1 stop4h 09m

$257

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

Mon 3/31

7:58 am-9:24 am

Nonstop2h 26m

San Diego

Thu 4/3

6:24 pm-9:50 pm

Nonstop2h 26m

$274

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/22

Showing 1-10 of 46 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 February 23, 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 February 23, 2025.

The most flights from USCO to SAN are scheduled on a Thursday (31 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (17 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 February 23, 2025.
See what other customers who have flown with Southwest, Alaska 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
4,385 reviews

Crew

8.7

Overall

8.1

Food

7.1

Comfort

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

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

Southwest
8.1
Very good
4,385 reviews
Southwest
8.1
Very good
4,385 reviews

Crew

8.7

Overall

8.1

Food

7.1

Comfort

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

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
4,385 reviews

Crew

8.7

Overall

8.1

Food

7.1

Comfort

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

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

Delta
8.0
Very good
8,203 reviews
Southwest
8.1
Very good
4,385 reviews

Crew

8.7

Overall

8.1

Food

7.1

Comfort

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

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

Hawaiian Airlines
7.9
Good
2,315 reviews
Southwest
8.1
Very good
4,385 reviews

Crew

8.7

Overall

8.1

Food

7.1

Comfort

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

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

United Airlines
7.4
Good
8,754 reviews
Southwest
8.1
Very good
4,385 reviews

Crew

8.7

Overall

8.1

Food

7.1

Comfort

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

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 147 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 $40. Southwest flights start at $99 while deals on Hawaiian 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 Durango La Plata 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: Air Canada (82%), United Airlines (80%), Frontier (78%).

  • 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 $378, our data indicates the cheapest price to be $47. The most popular route (Denver Intl - San Diego), is priced around $78.

  • 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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Alternative routes for Colorado to San Diego

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 February 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$155FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$156Average$439FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$164Average$350FlexibilityNo cancel feeOn-time63%
DeltaCheapest$194Average$286FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$197Average$371FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$256Average$392FlexibilityNo cancel feeOn-time75%
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