Cheap flights from San Diego to Denver (SAN - DEN) from $22

This is the cheapest one-way flight price, found on 9/20. Prices may vary by date and flight preferences.
SAN — DEN
Sep 26 — Oct 31

The best prices from San Diego to Denver Intl are usually found in February or January, booked 47 days in advance, depart on a Thursday or Saturday and return on a Wednesday

How to find the cheapest flight from San Diego (SAN) to Denver (DEN)

All the information you need to plan the best SAN to DEN flight in 2023: compare San Diego to Denver flight prices with the expected peak season, weather and rainfall in Denver.

Popular in

June

Cheapest in

February

Round-trip from

$197

One-way from

$64
High demand for flights, 25% potential price rise
Best time to find cheap flights, 36% potential price drop
From San Diego to Denver Intl
One-way flight from San Diego to Denver Intl

SAN - DEN

Price

$197 - $395

DEN

Temperature

30.2 - 73.4 °F

DEN

Rainfall

0.5 - 2.3 inches

What is the cheapest day to fly round-trip from San Diego to Denver?

Users have found that flying from San Diego to Denver on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from San Diego to Denver?

To save up to 18% on this flight, we recommend booking at least 45 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from San Diego to Denver from $217 1-2 weeks out and tickets from $264 for flights departing within the next 72 hours.

What is the cheapest month to fly from San Diego to Denver?

The best pricing can be found in the month of February. Prices to Denver from San Diego average $217. You can even find prices in February for less than $217, as users have found deals to Denver from as low as $71. The month of June appears to be one of the more expensive times to travel to Denver from San Diego. Flying in the targeted month can save you up to 32%.

When is the cheapest time to fly from San Diego to Denver (SAN - DEN)?

It’s typically best to fly out from San Diego to Denver in the evening. Doing so could potentially save you 50% on the flight price compared to flying at noon, which is usually more expensive.

Cheap Spirit Airlines flights from San Diego to Denver

Peruse some of the lowest-priced Spirit Airlines flights we've found from San Diego to Denver. It's recommended that users confirm their flight details before booking.
  • If you’re traveling from San Diego to Denver, one of the more common airlines traveling that route is Spirit Airlines. San Diego to Denver flights are typically 21% cheaper than other airlines traveling the same route. Flights from Spirit Airlines typically cost $317.34 RT. The cheapest Spirit Airlines flight found for this route was $134. When traveling from San Diego to Denver on Spirit Airlines, the most popular airport to depart from is San Diego Airport and the most popular airport to arrive at is Denver Intl Airport. When flying from San Diego to Denver, Spirit Airlines flights are 7% more popular than any other airline flying that same route.

Cheap Frontier flights from San Diego to Denver

Some of the best deals we've found on Frontier flights traveling from San Diego to Denver. Deals are refreshing constantly so come back soon for more options.
  • One of the most popular airlines traveling from San Diego to Denver is Frontier. Flights from Frontier traveling this route typically cost $166.94 RT. This price is typically 23% cheaper than other airlines that offer San Diego to Denver flights. When booking this route, the cheapest RT price found was $60. San Diego Airport is the most common San Diego airport to take off from when flying to Denver. Denver Intl Airport is the most popular arrival airport in Denver. When flying from San Diego to Denver, Frontier flights are -16% more popular than any other airline flying that same route.

Cheap San Diego to Denver flights in September & October 2023

The best prices found for SAN to DEN flights for September, October
Check out some of the best flight deals from San Diego to Denver in 2023. Check back regularly for other flight deals.

San Diego to Denver 2023 flight deals

Cheap flights to Denver from San Diego found for this year
Check out some of the best flight deals from San Diego to Denver in 2023. Check back regularly for other flight deals.

Non-stop flights to Denver from San Diego

Save time with San Diego to Denver direct flight deals
To help reduce your travel time, choose from one of these non-stop flights from San Diego to Denver. Search for alternative flights from San Diego to Denver by utilizing the search form above.

San Diego to Denver flights leaving soon

Late deals on return flights to Denver from San Diego, departing today and this week
Check out these flights departing soon from San Diego to Denver. It's wise to confirm all flight details are correct before booking.

One-way flights to Denver from San Diego

The cheapest one-way flights from San Diego to Denver
Users traveling one-way from San Diego to Denver can select one of these great deals. Users can also find round-trip San Diego to Denver flights by using the search form above.

Find flights from San Diego to Denver within your budget

Use the slider to find flights from San Diego to Denver that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$38 - $75

Route

Depart

Return

Price

San DiegoDenver Intl

SAN - DEN

SANDEN

San Diego

Wed 10/25

Nonstop2h 36m

Denver Intl

Sat 10/28

Nonstop2h 27m

San DiegoDenver Intl

SAN - DEN

SANDEN

San Diego

Sat 11/4

Nonstop2h 25m

Denver Intl

Sat 12/2

Nonstop2h 35m

San DiegoDenver Intl

SAN - DEN

SANDEN

San Diego

Wed 10/11

Nonstop2h 36m

Denver Intl

Tue 10/17

Nonstop2h 27m

San DiegoDenver Intl

SAN - DEN

SANDEN

San Diego

Sat 10/14

Nonstop2h 36m

Denver Intl

Sat 10/21

Nonstop2h 27m

San DiegoDenver Intl

SAN - DEN

SANDEN

San Diego

Wed 10/18

1 stop6h 35m

Denver Intl

Sat 10/21

Nonstop2h 27m

San DiegoDenver Intl

SAN - DEN

SANDEN

San Diego

Sat 11/4

Nonstop2h 25m

Denver Intl

Thu 11/30

Nonstop2h 35m

San DiegoDenver Intl

SAN - DEN

SANDEN

San Diego

Sat 11/4

Nonstop2h 25m

Denver Intl

Sat 12/2

1 stop5h 53m

San DiegoDenver Intl

SAN - DEN

SANDEN

San Diego

Wed 10/18

1 stop24h 09m

Denver Intl

Tue 10/24

1 stop4h 13m

San DiegoDenver Intl

SAN - DEN

SANDEN

San Diego

Wed 11/29

1 stop6h 31m

Denver Intl

Mon 12/4

1 stop3h 49m

Flights are sorted by cheapest first

Deals found on 9/20

Reviews of airlines servicing Denver

Peruse reviews from past customers who have flown with Spirit Airlines, Frontier 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.
Alaska Airlines
8.1
Very good
1,393 reviews

Overall

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.2

Boarding

8.3

Food

7.2

Reviews

1 / 10

People working on plane were terrific My business class seat was very uncomfortable. Blankets and pillows were not available. Food was barely OK

Alaska Airlines
8.1
Very good
1,393 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Overall

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.2

Boarding

8.3

Food

7.2

Reviews

1 / 10

People working on plane were terrific My business class seat was very uncomfortable. Blankets and pillows were not available. Food was barely OK

Delta
7.9
Good
3,016 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Overall

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.2

Boarding

8.3

Food

7.2

Reviews

1 / 10

People working on plane were terrific My business class seat was very uncomfortable. Blankets and pillows were not available. Food was barely OK

United Airlines
7.4
Good
1,890 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Overall

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.2

Boarding

8.3

Food

7.2

Reviews

1 / 10

People working on plane were terrific My business class seat was very uncomfortable. Blankets and pillows were not available. Food was barely OK

Spirit Airlines
6.3
Okay
1,483 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Overall

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.2

Boarding

8.3

Food

7.2

Reviews

1 / 10

People working on plane were terrific My business class seat was very uncomfortable. Blankets and pillows were not available. Food was barely OK

Frontier
5.8
Fair
762 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Overall

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.2

Boarding

8.3

Food

7.2

Reviews

1 / 10

People working on plane were terrific My business class seat was very uncomfortable. Blankets and pillows were not available. Food was barely OK

Related info for your journey

Useful info, stats and facts about San Diego to Denver flights.

What airports do I use to fly from San Diego to Denver?

You will need to book a flight from San Diego to Denver Intl if you want to fly from San Diego to Denver. At least 5 different airlines have flights from San Diego (SAN) to Denver Intl (DEN) on a regular basis. There are 25 flights to Denver from the San Diego airport per day. If you manage to book one that is nonstop, then you can expect the flight time from SAN to DEN to be around 2h 24m.

Can I find flights from San Diego to Denver for under $100 on Cheapflights?

Yes, there are multiple flights from San Diego to Denver for under $100. The cheapest flight booked recently is on Frontier for just $38, but on average you can expect to pay $63.

Are there nonstop flights from San Diego to Denver for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from San Diego to Denver under $100. A good price for a nonstop flight from San Diego to Denver is less than $68.

Are there last-minute flights available from San Diego to Denver for under $100?

There are currently 20+ open flights from San Diego to Denver within the next 7 days for less than $100.

What days are nonstop flights available from San Diego to Denver?

Nonstop flights can be found on the following days: Thursday, Friday, Saturday.

How popular is this San Diego to Denver flight route?

How many flights depart from San Diego to Denver on average per day?

On average 8 flights depart from San Diego to Denver per day.
Morning (6am - Noon) - 100% of flight departures

How long is the flight from San Diego to Denver?

Frontier and Spirit Airlines can get you from San Diego to Denver in just under 2h 36m. Your travel time can differ by up to 21h 33m. There are 856 mi between San Diego and Denver. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines flying from San Diego to Denver round-trip?

Frontier, at $38, was found to be the cheapest airline from San Diego to Denver. An alternate airline flying to your destination would be Spirit Airlines. Frontier is priced at 82% lower than the current average price of a flight leaving 3 months from now.

What are the most popular airlines that fly from San Diego to Denver?

What are the most reliable airlines from San Diego to Denver?

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 San Diego to Denver on time: SkyWest Airlines (100%), SWISS (96%), Lufthansa (85%).

What are the cheapest flights from San Diego to Denver?

While on average a flight from San Diego to Denver is generally $901, our data shows the cheapest flight currently is $54. When looking at the most popular route, (San Diego - Denver Intl), you can expect to pay $57 for that flight.

What does SAN to DEN mean?

San Diego Airport is SAN and Denver Intl Airport is DEN. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

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

The chart below displays the airlines Cheapflights users traveling from San Diego to Denver choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$60Average$167FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$70Average$127FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
United AirlinesCheapest$134Average$317FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$177Average$451FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapest$198Average$260FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

Hourly flight availability from San Diego to Denver

See what time of day planes typically take off from San Diego to Denver
3%of flight departuresEarly morningMidnight to 6 am
59%of flight departuresMorning6 am to noon
35%of flight departuresAfternoonNoon to 6 pm
3%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from San Diego to Denver

See how many times per day planes take to the skies headed from San Diego to Denver
Sunday19daily flights
Monday30daily flights
Tuesday25daily flights
Wednesday25daily flights
Thursday28daily flights
Friday29daily flights
Saturday20daily flights
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.