$61+ 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 5/27. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SAN
May 6 — May 131
1 adult, Economy
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Find cheap flights from Colorado to San Diego 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 Colorado to San Diego
Keep the following information in mind while searching for Colorado to San Diego flight deals. Data was last updated May 1, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $123 (Cheapflightsfares) |
One-way from | $61 (Cheapflightsfares) |
Popular in | March |
Cheapest in | May |
Average price | $140 |
Good round-trip deal | $165 or less |
Good one-way deal | $103 or less |
Find flight deals from Colorado to San Diego
Cheapest flights from Colorado to San DiegoExplore 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 May 1, 2025.
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 May 1, 2025.
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/318:22 amDEN - SAN
Nonstop2h 33mFrontier
Sat 5/316:18 pmSAN - DEN
Nonstop2h 37mFrontier
Deal found 4/29![Frontier logo]()
$124
This Expedia deal was found by Cheapflights users on 4/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/97:06 pmDEN - SAN
1 stop5h 59mMultiple Airlines
Thu 7/1710:52 amSAN - DEN
Nonstop2h 39mMultiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$182
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/296:43 pmDEN - SAN
Nonstop2h 25mAlaska Airlines
Fri 11/72:30 pmSAN - DEN
Nonstop2h 22mAlaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$197
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/67:45 amDEN - SAN
Nonstop2h 24mUnited Airlines
Thu 10/165:50 pmSAN - DEN
1 stop5h 38mUnited Airlines
Deal found 4/29![United Airlines logo]()
$203
This American Airlines deal was found by Cheapflights users on 4/30. 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 5/155:00 amGJT - SAN
1 stop4h 35mAmerican Airlines
Mon 5/194:31 pmSAN - GJT
1 stop4h 17mAmerican Airlines
Deal found 4/30![American Airlines logo]()
$221
This Booking.com deal was found by Cheapflights users on 4/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/306:06 pmCOS - SAN
2 stops26h 47mMultiple Airlines
Fri 6/66:15 amSAN - COS
2 stops9h 45mMultiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$227
This American Airlines deal was found by Cheapflights users on 4/30. 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 6/65:45 amDRO - SAN
1 stop4h 05mAmerican Airlines
Sun 6/157:33 pmSAN - DRO
1 stop3h 35mAmerican Airlines
Deal found 4/30![American Airlines logo]()
$237
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1212:50 pmDEN - SAN
1 stop4h 09mDelta
Sat 6/141:28 pmSAN - DEN
1 stop5h 00mDelta
Deal found 4/29![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 4/30. 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 7/38:10 pmCOS - SAN
1 stop4h 15mSouthwest
Tue 7/86:45 amSAN - COS
1 stop4h 10mSouthwest
Deal found 4/30![Southwest logo]()
$239
This Delta deal was found by Cheapflights users on 4/30. 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 6/145:56 amGJT - SAN
1 stop3h 44mDelta
Tue 6/175:04 pmSAN - GJT
1 stop4h 27mDelta
Deal found 4/30![Delta logo]()
$243
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/256:30 pmCOS - SAN
1 stop4h 54mUnited Airlines
Fri 5/306:28 pmSAN - COS
1 stop4h 31mUnited Airlines
Deal found 4/29![United Airlines logo]()
$245
This American Airlines deal was found by Cheapflights users on 4/30. 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 8/712:14 pmDEN - SAN
1 stop4h 11mAmerican Airlines
Mon 8/1112:50 pmSAN - DEN
1 stop4h 28mAmerican Airlines
Deal found 4/30![American Airlines logo]()
$247
Cheapflights Fare Finder
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 May 1, 2025.
Use the filters below to find and compare flights from Colorado to San Diego that are best for you.
Fly from
Colorado
Fly to
San Diego
Route
Depart
Return
Price
DenverSan Diego
DEN - SAN
DENSAN
Denver Intl
Sat 5/31
8:22 am-9:55 am
Nonstop2h 33m
San Diego
Sat 5/31
6:18 pm-9:55 pm
Nonstop2h 37m
$124
DenverSan Diego
DEN - SAN
DENSAN
Denver Intl
Wed 7/9
7:06 pm-12:05 am
1 stop5h 59m
San Diego
Thu 7/17
10:52 am-2:31 pm
Nonstop2h 39m
$182
Grand JunctionSan Diego
GJT - SAN
GJTSAN
Grand Junction Regnl
Thu 5/15
5:00 am-8:35 am
1 stop4h 35m
San Diego
Mon 5/19
4:31 pm-9:48 pm
1 stop4h 17m
$221
Colorado SpringsSan Diego
COS - SAN
COSSAN
Colorado Springs
Fri 5/30
6:06 pm-7:53 pm
2 stops26h 47m
San Diego
Fri 6/6
6:15 am-5:00 pm
2 stops9h 45m
$227
DenverSan Diego
DEN - SAN
DENSAN
Denver Intl
Thu 6/12
12:50 pm-3:59 pm
1 stop4h 09m
San Diego
Sat 6/14
1:28 pm-7:28 pm
1 stop5h 00m
$237
DurangoSan Diego
DRO - SAN
DROSAN
Durango La Plata County
Fri 6/6
5:45 am-8:50 am
1 stop4h 05m
San Diego
Sun 6/15
7:33 pm-12:08 am
1 stop3h 35m
$237
Colorado SpringsSan Diego
COS - SAN
COSSAN
Colorado Springs
Thu 7/3
8:10 pm-11:25 pm
1 stop4h 15m
San Diego
Tue 7/8
6:45 am-11:55 am
1 stop4h 10m
$239
Grand JunctionSan Diego
GJT - SAN
GJTSAN
Grand Junction Regnl
Sat 6/14
5:56 am-8:40 am
1 stop3h 44m
San Diego
Tue 6/17
5:04 pm-10:31 pm
1 stop4h 27m
$243
Colorado SpringsSan Diego
COS - SAN
COSSAN
Colorado Springs
Sun 5/25
6:30 pm-10:24 pm
1 stop4h 54m
San Diego
Fri 5/30
6:28 pm-11:59 pm
1 stop4h 31m
$245
DenverSan Diego
DEN - SAN
DENSAN
Denver Intl
Thu 5/29
11:16 am-3:41 pm
1 stop5h 25m
San Diego
Sun 6/1
6:20 am-12:10 pm
1 stop4h 50m
$247
Showing 1-10 of 39 results
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.
Cheapflights Insights
Everything you need to know about your flight from Colorado to San Diego
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 May 1, 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.
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 May 1, 2025.
See what other customers who have flown with Breeze Airways, Alaska Airlines and Southwest 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.
Food
6.7
Overall
8.1
Entertainment
6.6
Boarding
8.3
Crew
8.8
Comfort
8.2
Reviews
1 / 11
10.0
ExcellentDena,Dec 2024
LAS - BDL
Food
6.7
Overall
8.1
Entertainment
6.6
Boarding
8.3
Crew
8.8
Comfort
8.2
Reviews
1 / 11
10.0
ExcellentDena,Dec 2024
LAS - BDL
Food
6.7
Overall
8.1
Entertainment
6.6
Boarding
8.3
Crew
8.8
Comfort
8.2
Reviews
1 / 11
10.0
ExcellentDena,Dec 2024
LAS - BDL
Food
6.7
Overall
8.1
Entertainment
6.6
Boarding
8.3
Crew
8.8
Comfort
8.2
Reviews
1 / 11
10.0
ExcellentDena,Dec 2024
LAS - BDL
Food
6.7
Overall
8.1
Entertainment
6.6
Boarding
8.3
Crew
8.8
Comfort
8.2
Reviews
1 / 11
10.0
ExcellentDena,Dec 2024
LAS - BDL
Food
6.7
Overall
8.1
Entertainment
6.6
Boarding
8.3
Crew
8.8
Comfort
8.2
Reviews
1 / 11
10.0
ExcellentDena,Dec 2024
LAS - BDL
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.
Traveling to a place near Colorado?
Book flights to Colorado if you plan to visit one of these locationsEl Cajon
Chula Vista
Lemon Grove
National City
Imperial Beach
La Mesa
Alpine
Poway
Santee
Coronado
Browse thousands of different options on Cheapflights for your next trip
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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.
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 May 1, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$58 | Average$158 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$156 | Average$429 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$177 | Average$345 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$194 | Average$317 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$197 | Average$366 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$292 | Average$404 | FlexibilityNo cancel fee | On-time75% |