Which airline has the best punctuality record on San Diego to Denver flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 10% of flights being delayed.

What is the most punctual flight time for San Diego to Denver flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

How often are flights from San Diego to Denver delayed?

About 16% of weekly flights between San Diego and Denver have experienced delays in the past year, with the average delay time being 141 minutes.

How popular is this San Diego to Denver flight route?

The San Diego to Denver Intl flight path was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

How long is the flight from San Diego to Denver?

A quick flight from San Diego to Denver can take about 3h 50m. Delta provides one of the quickest options available for as low as £170. There are 852 mi between San Diego and Denver. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

In terms of precipitation, rainfall in Denver ranges from 13.0 - 58.0 inches per month. May is typically the wettest month, when rainfall can reach 58.0 mm. January is typically the driest time to visit Denver when rainfall is around 13.0 mm.

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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

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: Sun Country Air (100%), Air Canada (85%), United Airlines (84%).

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

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

How can I find direct flights from San Diego to Denver?

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

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

Yes. Cheapflights offers flight deals from San Diego to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£59+ Cheap Flights from San Diego to Denver

Cheap flight deals from San Diego to Denver

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Cheapest flights from San Diego to Denver
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 31 October 2026.

Thu 10/1219:51 -

1 stop27h 17m

Thu 17/1222:29 -

Nonstop2h 29m

Deal found 26/10£91

Thu 12/1106:25 -

Nonstop2h 34m

Mon 16/1122:29 -

1 stop12h 42m

Deal found 27/10£92

Sun 22/1120:00 -

Nonstop2h 25m

Fri 27/1107:15 -

Nonstop2h 30m

Deal found 27/10£117

Sun 6/1206:15 -

Nonstop2h 30m

Thu 10/1215:45 -

1 stop4h 10m

Deal found 28/10£122

Thu 26/1108:45 -

Nonstop2h 25m

Thu 3/1207:40 -

Nonstop2h 30m

Deal found 29/10£122

Tue 17/1109:20 -

1 stop3h 45m

Sat 21/1105:45 -

1 stop4h 55m

Deal found 26/10£125

Sun 6/1208:30 -

1 stop3h 55m

Sun 6/1216:55 -

1 stop4h 00m

Deal found 28/10£128

Thu 10/1212:35 -

1 stop4h 05m

Tue 15/1208:50 -

2 stops5h 10m

Deal found 30/10£129

Sat 21/1117:30 -

1 stop5h 40m

Wed 25/1115:50 -

1 stop5h 10m

Deal found 30/10£132

Find flight deals from San Diego to Denver

Round-trip from	£91
One-way from	£59
Popular in	June
Cheapest in	February
Average price	£157
Good one-way deal	£454 or less

Frontier
10/12-17/12
1 total stop
29h 46m total
San Diego to Denver

Search Deals

Southwest
24/11-31/12
Nonstop
2h 25m total
San Diego to Denver

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£24 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£5 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Price to beat on a one-way flight from San Diego to Denver Intl.

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San DiegoDenver

SAN San Diego - DEN Denver Intl

SANDEN

San Diego

Thu 10/12

12:35-17:40

1 stop4h 05m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£63

San DiegoDenver

SAN San Diego - DEN Denver Intl

SANDEN

San Diego

Thu 24/12

12:35-17:40

1 stop4h 05m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£63

San DiegoDenver

SAN San Diego - DEN Denver Intl

SANDEN

San Diego

Fri 5/3

08:10-13:20

1 stop4h 10m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£63

Fastest return journey

San DiegoDenver

SAN San Diego - DEN Denver Intl

SANDEN

San Diego

Fri 25/12

09:20-14:05

1 stop3h 45m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£63

San DiegoDenver

SAN San Diego - DEN Denver Intl

SANDEN

San Diego

Fri 1/1

12:35-17:40

1 stop4h 05m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£63

San DiegoDenver

SAN San Diego - DEN Denver Intl

SANDEN

San Diego

Sun 10/1

06:15-12:35

1 stop5h 20m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£66

San DiegoDenver

SAN San Diego - DEN Denver Intl

SANDEN

San Diego

Sun 31/1

18:20-23:30

1 stop4h 10m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£66

San DiegoDenver

SAN San Diego - DEN Denver Intl

SANDEN

San Diego

Sun 13/12

08:30-13:25

1 stop3h 55m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£66

San DiegoDenver

SAN San Diego - DEN Denver Intl

SANDEN

San Diego

Sat 9/1

07:15-14:00

2 stops5h 45m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£70

San DiegoDenver

SAN San Diego - DEN Denver Intl

SANDEN

San Diego

Sat 16/1

07:15-14:00

2 stops5h 45m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£70

Flights are sorted by cheapest return flights first.

Deals found on 29/10

Showing 1-10 of 22 resultsSorted by cheapest first

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.

SAN-DEN

Estimated return 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 San Diego to Denver

Prices

Delays

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

The best time to book flights from San Diego to Denver is 56 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, February is the cheapest month in which you can book a flight from San Diego to Denver (average of £97). Flying from San Diego to Denver in June is currently the most expensive (average of £208). 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?

When flying from San Diego to Denver, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 67% versus a flight in the afternoon.

How much does it cost for a return flight from San Diego to Denver?

Airfare is below average for this route at the moment.

San Diego to Denver flights typically cost between £115 and £224 in December.
The cheapest return price found within the last 5 days was £91 on Frontier (10 Dec–17 Dec).

Related info for your journey

How popular is this San Diego to Denver flight route?
The San Diego to Denver Intl flight path was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
How long is the flight from San Diego to Denver?
A quick flight from San Diego to Denver can take about 3h 50m. Delta provides one of the quickest options available for as low as £170. There are 852 mi between San Diego and Denver. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
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: Sun Country Air (100%), Air Canada (85%), United Airlines (84%).
Can I find deals for flights from San Diego to Denver that include hotel bookings?
Yes. In addition to deals on San Diego to Denver flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from San Diego to Denver?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Denver.
Can I find deals for business class flights from San Diego to Denver?
Yes. Cheapflights offers flight deals from San Diego to Denver 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 San Diego to Denver?
Currently, February is the cheapest month in which you can book a flight from San Diego to Denver (average of £97). Flying from San Diego to Denver in June is currently the most expensive (average of £208). 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.

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Deals for San Diego to Denver flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from San Diego to Denver?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from San Diego to Denver.

Can Cheapflights find flights from San Diego to Denver with no change fees?

Yes! Cheapflights helps users easily find flights from San Diego to Denver with no change fees.

Can Cheapflights notify me if prices for flights from San Diego to Denver become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Denver from San Diego today and book when prices fit your budget.

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Cheap flights from San Diego to Denver from £59

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap 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 31 October 2026.

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 31 October 2026.

Best flights from San Diego to DenverDiscover carefully curated flight deals from San Diego to Denver that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 October 2026.

Discover carefully curated flight deals from San Diego to Denver that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 October 2026.

Direct flights from San Diego to DenverExplore direct flight options from San Diego to Denver based on user searches, and compare prices and availability for your desired travel dates. Data last updated 31 October 2026.

Explore direct flight options from San Diego to Denver based on user searches, and compare prices and availability for your desired travel dates. Data last updated 31 October 2026.

Last-minute flights from San Diego to DenverDiscover last-minute flight deals from San Diego to Denver. Data last updated 31 October 2026 and is based on user searches.

Discover last-minute flight deals from San Diego to Denver. Data last updated 31 October 2026 and is based on user searches.

One-way flights from San Diego to DenverSearch for one-way flight options from San Diego to Denver. Find affordable one-way fares based on user searches. Data last updated 31 October 2026.

Search for one-way flight options from San Diego to Denver. Find affordable one-way fares based on user searches. Data last updated 31 October 2026.

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Use the filters below to find and compare flights from San Diego to Denver that are best for you.

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.

Cheapflights Insights

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

The best time to book flights from San Diego to Denver is 56 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?

What is the cheapest time of day to fly from SAN to DEN?

When flying from San Diego to Denver, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 67% versus a flight in the afternoon.

How much does it cost for a return flight from San Diego to Denver?

Airfare is below average for this route at the moment.

San Diego to Denver flights typically cost between £115 and £224 in December.The cheapest return price found within the last 5 days was £91 on Frontier (10 Dec–17 Dec).

How often are flights from San Diego to Denver delayed?

About 16% of weekly flights between San Diego and Denver have experienced delays in the past year, with the average delay time being 141 minutes.

What is the most punctual flight time for San Diego to Denver flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on San Diego to Denver flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 10% of flights being delayed.

Related info for your journey

How popular is this San Diego to Denver flight route?

How long is the flight from San Diego to Denver?

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

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

How can I find direct flights from San Diego to Denver?

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

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

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Complete your trip

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Cheapest flights from San Diego to Denver
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 31 October 2026.

Best flights from San Diego to Denver
Discover carefully curated flight deals from San Diego to Denver that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 October 2026.

Direct flights from San Diego to Denver
Explore direct flight options from San Diego to Denver based on user searches, and compare prices and availability for your desired travel dates. Data last updated 31 October 2026.

Last-minute flights from San Diego to Denver
Discover last-minute flight deals from San Diego to Denver. Data last updated 31 October 2026 and is based on user searches.

One-way flights from San Diego to Denver
Search for one-way flight options from San Diego to Denver. Find affordable one-way fares based on user searches. Data last updated 31 October 2026.

San Diego to Denver flights typically cost between £115 and £224 in December.
The cheapest return price found within the last 5 days was £91 on Frontier (10 Dec–17 Dec).