Frontier's UpFront Plus offers a guaranteed empty middle seat for added comfort.
Frontier's Zone 1 boarding available with carry-on purchase or special fare bundle.
$50+ Cheap flights from San Diego to Denver (SAN - DEN)
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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
Mar 3 — Mar 101
1 adult, Economy
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Find cheap flights from San Diego to Denver 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.The best prices from San Diego to Denver Intl are usually found in April or January, booked 71 days in advance, depart on a Saturday or Thursday and return on a Saturday
Cheap flight deals from San Diego to Denver
Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Denver (DEN). 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 February 26, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $113 (Cheapflightsfares) |
One-way from | $50 (Trip.com) |
Popular in | December |
Cheapest in | April |
Average price | $170 |
Good round-trip deal | $164 or less |
Good one-way deal | $104 or less |
Find flight deals from San Diego to Denver
Cheapest flights from San Diego to DenverExplore the most affordable flight options available from San Diego to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 26, 2025.
Explore the most affordable flight options available from San Diego to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 26, 2025.
This Cheapflightsfares deal was found by Cheapflights users on 2/26. 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 5/86:25 amSAN - DEN
Nonstop2h 31mFrontier
Sun 5/1110:43 pmDEN - SAN
Nonstop2h 30mFrontier
Deal found 2/26![Frontier logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 2/25. 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.
Sat 3/1512:48 pmSAN - DEN
Nonstop2h 28mMultiple Airlines
Sun 3/166:15 amDEN - SAN
Nonstop2h 22mMultiple Airlines
Deal found 2/25![Multiple Airlines logo]()
$121
This American Airlines deal was found by Cheapflights users on 2/26. 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.
Sat 4/124:30 pmSAN - DEN
1 stop4h 18mAmerican Airlines
Tue 4/156:46 pmDEN - SAN
1 stop3h 51mAmerican Airlines
Deal found 2/26![American Airlines logo]()
$169
This Southwest deal was found by Cheapflights users on 2/26. 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 5/65:40 pmSAN - DEN
1 stop4h 05mSouthwest
Thu 5/159:45 pmDEN - SAN
Nonstop2h 25mSouthwest
Deal found 2/26![Southwest logo]()
$170
This Alaska Airlines deal was found by Cheapflights users on 2/25. 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.
Thu 5/88:44 pmSAN - DEN
1 stop13h 07mAlaska Airlines
Mon 5/126:37 pmDEN - SAN
1 stop6h 22mAlaska Airlines
Deal found 2/25![Alaska Airlines logo]()
$212
This Delta deal was found by Cheapflights users on 2/24. 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 4/310:55 amSAN - DEN
1 stop6h 10mDelta
Mon 4/76:55 amDEN - SAN
1 stop4h 16mDelta
Deal found 2/24![Delta logo]()
$217
This United deal was found by Cheapflights users on 2/25. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2912:45 pmSAN - DEN
Nonstop2h 21mUnited Airlines
Sun 8/3111:15 amDEN - SAN
Nonstop2h 23mUnited Airlines
Deal found 2/25![United Airlines logo]()
$307
Find flights from San Diego to Denver within your budget
Customize your flight search to find flights from San Diego to Denver 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 26, 2025.
Fly from
San Diego
Fly to
Denver
Route
Depart
Return
Price
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Thu 5/8
6:25 am-9:56 am
Nonstop2h 31m
Denver Intl
Sun 5/11
10:43 pm-12:13 am
Nonstop2h 30m
$113
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Sat 3/15
12:48 pm-4:16 pm
Nonstop2h 28m
Denver Intl
Sun 3/16
6:15 am-7:37 am
Nonstop2h 22m
$121
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Sat 4/12
4:30 pm-9:48 pm
1 stop4h 18m
Denver Intl
Tue 4/15
6:46 pm-9:37 pm
1 stop3h 51m
$169
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Tue 5/6
5:40 pm-10:45 pm
1 stop4h 05m
Denver Intl
Thu 5/15
9:45 pm-11:10 pm
Nonstop2h 25m
$170
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Thu 5/8
8:44 pm-10:51 am
1 stop13h 07m
Denver Intl
Mon 5/12
6:37 pm-11:59 pm
1 stop6h 22m
$212
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Thu 4/3
10:55 am-6:05 pm
1 stop6h 10m
Denver Intl
Mon 4/7
6:55 am-10:11 am
1 stop4h 16m
$217
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Wed 4/2
6:25 am-9:57 am
Nonstop2h 32m
$50
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Sat 4/12
4:05 pm-7:31 pm
Nonstop2h 26m
$75
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Tue 4/8
5:40 pm-10:45 pm
1 stop4h 05m
$80
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Sat 4/5
4:30 pm-9:48 pm
1 stop4h 18m
$85
Showing 1-10 of 14 results
Compare providers for flights from San Diego to Denver
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Diego to Denver in February.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars |
- Most accurate provider: When it comes to deals on San Diego-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Diego-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Diego-Denver flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Diego-Denver flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Diego-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
The best insider tips for San Diego to Denver flights
Find out what our experts recommend to make the most of your San Diego to Denver trip
Airlines
![Frontier]()
Frontier
![United Airlines]()
United Airlines
United's Economy Plus offers extra legroom, ideal for comfort on short flights.
United's Basic Economy restricts carry-ons; consider this when booking.
Airports
Our travel experts
Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Best time to book a flight from San Diego to Denver
Have a flexible travel schedule? Discover the best time to fly to Denver 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.
Travel insights for flights from San Diego to Denver
Get recent, data-driven insights about flights from San Diego to Denver including ideal travel times, pricing trends, and more.
How far ahead should I book a flight from San Diego to Denver?
Use this chart to determine the optimal time to book a round-trip flight from San Diego to Denver. Price data was last updated on February 25, 2025.
The best time to book flights from San Diego to Denver is 71 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from San Diego to Denver?
Currently, October is the cheapest month in which you can book a flight from San Diego to Denver (average of $197). Flying from San Diego to Denver 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 DEN?
Find hourly flight availability from San Diego to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 26, 2025.
It’s typically best to fly out from San Diego to Denver in the evening. Doing so could potentially save you 39% on the flight price compared to flying in the morning, which is usually more expensive.
What is the cheapest day to fly from San Diego to Denver?
Use this chart to determine the cheapest time to fly round-trip from San Diego to Denver. Price data was last updated on February 23, 2025.
Travelers seeking maximum savings on their San Diego to Denver flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from San Diego to Denver
Explore weekly flight availability from San Diego to Denver. 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 26, 2025.
The most flights from SAN to DEN are scheduled on a Monday (24 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).
Rainfall in Denver by month
Plan your trip to Denver by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Denver ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Denver when rainfall is around 0.5 in.
Temperature in Denver by month
Plan your trip to Denver by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Denver, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).
Reviews of airlines servicing Denver
Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated February 26, 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and Delta from San Diego to Denver to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.2
Comfort
8.1
Crew
8.7
Overall
8.1
Entertainment
7.6
Food
7.1
Reviews
1 / 20
10.0
Merlyn,Feb 2025
LAX - SMF
Boarding
8.2
Comfort
8.1
Crew
8.7
Overall
8.1
Entertainment
7.6
Food
7.1
Reviews
1 / 20
10.0
Merlyn,Feb 2025
LAX - SMF
Boarding
8.2
Comfort
8.1
Crew
8.7
Overall
8.1
Entertainment
7.6
Food
7.1
Reviews
1 / 20
10.0
Merlyn,Feb 2025
LAX - SMF
Boarding
8.2
Comfort
8.1
Crew
8.7
Overall
8.1
Entertainment
7.6
Food
7.1
Reviews
1 / 20
10.0
Merlyn,Feb 2025
LAX - SMF
Boarding
8.2
Comfort
8.1
Crew
8.7
Overall
8.1
Entertainment
7.6
Food
7.1
Reviews
1 / 20
10.0
Merlyn,Feb 2025
LAX - SMF
Boarding
8.2
Comfort
8.1
Crew
8.7
Overall
8.1
Entertainment
7.6
Food
7.1
Reviews
1 / 20
10.0
Merlyn,Feb 2025
LAX - SMF
Related info for your journey
Find useful and relevant information for your journey from San Diego to Denver. 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 San Diego?
Book flights to San Diego if you plan to visit one of these locationsWestminster
Black Hawk
Winter Park
Lakewood
Broomfield
Cripple Creek
Silverthorne
Golden
Brighton
Keystone
Frisco
Wheat Ridge
Grand Lake
Idaho Springs
Greeley
Central City
Copper Mountain
Longmont
Thornton
Limon
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Alternative routes for San Diego to Denver
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from San Diego to Denver
Discover the top 5 airlines that operate flights from San Diego to Denver. 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 26, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$57 | Average$144 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$158 | Average$270 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$164 | Average$304 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$195 | Average$265 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$231 | Average$325 | FlexibilityNo cancel fee | On-time71% |