69 € Cheap Flights from San Diego to Denver International

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Flight deals from San Diego to Denver International

Looking for a cheap last-minute deal or the best return flight from San Diego to Denver International Airport? If you want to travel next month, return fares start from 101 €. Find the lowest prices on one-way and return tickets right here.

Denver.69 € per passenger.Departing Sat, 1 Aug, returning Sat, 8 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Sat, 1 Aug, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Sat, 8 Aug, arriving in San Diego International.Price includes taxes and charges.From 69 €, select.

Denver.69 € per passenger.Departing Sat, 29 Aug, returning Sat, 5 Sep.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Sat, 29 Aug, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Sat, 5 Sep, arriving in San Diego International.Price includes taxes and charges.From 69 €, select.

Denver.72 € per passenger.Departing Wed, 23 Sep, returning Sat, 26 Sep.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Wed, 23 Sep, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Sat, 26 Sep, arriving in San Diego International.Price includes taxes and charges.From 72 €, select.

Denver.75 € per passenger.Departing Sat, 10 Oct, returning Tue, 13 Oct.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Sat, 10 Oct, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Tue, 13 Oct, arriving in San Diego International.Price includes taxes and charges.From 75 €, select.

Denver.76 € per passenger.Departing Thu, 30 Jul, returning Tue, 4 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Thu, 30 Jul, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Tue, 4 Aug, arriving in San Diego International.Price includes taxes and charges.From 76 €, select.

Denver.84 € per passenger.Departing Mon, 16 Nov, returning Wed, 18 Nov.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Mon, 16 Nov, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Wed, 18 Nov, arriving in San Diego International.Price includes taxes and charges.From 84 €, select.

Denver.84 € per passenger.Departing Wed, 30 Sep, returning Sun, 4 Oct.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Wed, 30 Sep, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Sun, 4 Oct, arriving in San Diego International.Price includes taxes and charges.From 84 €, select.

Denver.92 € per passenger.Departing Fri, 30 Oct, returning Mon, 2 Nov.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Fri, 30 Oct, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Mon, 2 Nov, arriving in San Diego International.Price includes taxes and charges.From 92 €, select.

Denver.100 € per passenger.Departing Tue, 23 Jun, returning Wed, 1 Jul.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Tue, 23 Jun, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Wed, 1 Jul, arriving in San Diego International.Price includes taxes and charges.From 100 €, select.

Denver.101 € per passenger.Departing Wed, 22 Jul, returning Fri, 31 Jul.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Wed, 22 Jul, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Fri, 31 Jul, arriving in San Diego International.Price includes taxes and charges.From 101 €, select.

Denver.131 € per passenger.Departing Sat, 20 Jun, returning Wed, 24 Jun.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Sat, 20 Jun, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Wed, 24 Jun, arriving in San Diego International.Price includes taxes and charges.From 131 €, select.

Denver.229 € per passenger.Departing Tue, 5 Jan, returning Tue, 19 Jan.Return flight with United.Outbound direct flight with United departs from San Diego International on Tue, 5 Jan, arriving in Denver International.Inbound direct flight with United departs from Denver International on Tue, 19 Jan, arriving in San Diego International.Price includes taxes and charges.From 229 €, select.

Denver.229 € per passenger.Departing Sat, 5 Dec, returning Mon, 7 Dec.Return flight with United.Outbound direct flight with United departs from San Diego International on Sat, 5 Dec, arriving in Denver International.Inbound direct flight with United departs from Denver International on Mon, 7 Dec, arriving in San Diego International.Price includes taxes and charges.From 229 €, select.

Denver.230 € per passenger.Departing Wed, 30 Dec, returning Sat, 2 Jan.Return flight with United.Outbound direct flight with United departs from San Diego International on Wed, 30 Dec, arriving in Denver International.Inbound direct flight with United departs from Denver International on Sat, 2 Jan, arriving in San Diego International.Price includes taxes and charges.From 230 €, select.

Denver.231 € per passenger.Departing Tue, 17 Nov, returning Tue, 1 Dec.Return flight with United.Outbound direct flight with United departs from McClellan-Palomar on Tue, 17 Nov, arriving in Denver International.Inbound direct flight with United departs from Denver International on Tue, 1 Dec, arriving in McClellan-Palomar.Price includes taxes and charges.From 231 €, select.

Denver.239 € per passenger.Departing Fri, 12 Mar, returning Wed, 17 Mar.Return flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from San Diego International on Fri, 12 Mar, arriving in Denver International.Inbound direct flight with Alaska Airlines departs from Denver International on Wed, 17 Mar, arriving in San Diego International.Price includes taxes and charges.From 239 €, select.

Find the cheapest month to fly from San Diego to Denver International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Diego to Denver International flights are currently cheapest in August.

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Direct flights from San Diego to Denver International

San Diego to Denver International: Alternative routes

Compare routes from San Diego to Denver below. You may find an airport to fly into that's cheaper, faster, or easier than Denver International.

San Diego to Denver: Flight information

The things to know before you go.

Cheapest flight found	69 €
Cheapest month to fly	August
Average flight time	2 hrs, 28 mins
Most popular airline	Southwest Airlines
Average flights per week	484

Finding cheap flights from San Diego to Denver International: Frequently asked questions

How much are return flights from San Diego to Denver International?

The best price we found for a return flight from San Diego to Denver International is 69 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from San Diego to Denver International?

2 hours and 27 minutes is the average flight time from San Diego to Denver International.

Which airlines fly direct from San Diego to Denver International?

Southwest Airlines, Alaska Airlines and United fly direct from San Diego to Denver International.

How many flights are there a week from San Diego to Denver International?

As of June 2026, there are 484 flights per week flying from San Diego to Denver International.

When is the cheapest time to fly from San Diego to Denver International?

The cheapest month to fly from San Diego to Denver International is usually August.

Which upcoming date is cheapest to fly from San Diego to Denver International Airport on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from San Diego to Denver International Airport on Saturday, 1 August 2026.

Can I get a direct flight from San Diego to Denver International Airport?

Yes – the average flight time is 2 hours and 27 minutes.

How can I find the best flight deal to Denver International?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Denver International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Denver?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Denver is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from San Diego to Denver International with?

The cheapest airline that flies to Denver International is Frontier Airlines .

Travelling from San Diego to Denver International Airport (DEN): What you need to know

The first chapter of your trip begins at one of San Diego's main airports, San Diego International Airport (SAN) or McClellan-Palomar Airport (CLD). Explore the options for booking a flight from San Diego to Denver International Airport (DEN) leaving from either of these.
The average length of a direct San Diego to Denver International Airport flight is 2 hours 25 minutes.
Denver is one hour ahead of San Diego. Denver International Airport is located in Denver, which is in the UTC-7 timezone.
Choose from 97 direct services each week between San Diego International Airport (SAN) and Denver International Airport (DEN). This is the most popular route when departing from San Diego.
Your flight from San Diego to DEN won't wait if you're running late, so don't forget to check in on time. Arrive up to one hour in advance for domestic flights and two hours ahead for international travel.
July is a busy travel month. If you're taking off then or around a major holiday like July Fourth, be there even earlier. Aim for at least two hours ahead for domestic flights and up to four hours for international journeys.

Airports in San Diego

San Diego International Airport (SAN)

San Diego International Airport (SAN) is a convenient option for travelling directly to your destination. Nonstop flights from San Diego to Denver International Airport (DEN) depart from this terminal.
At SAN, you can choose from various airlines offering direct flights from San Diego to Denver International Airport, including:
Most passengers prefer to fly with United between SAN and DEN.
United is the best performing carrier for punctuality on this route.
The journey from central San Diego to SAN takes around 25 minutes by public transport. If you drive, ride-share or grab a taxi, you'll cover the 5 kilometres in 15 minutes or so, depending on traffic conditions.
Have an early flight from San Diego to Denver International Airport? Avoid the stress of rushing to the terminal (and sneak in some extra precious sleep) by picking one of these stays close to San Diego International Airport:
Of all flights leaving San Diego International Airport, 74% arrive on time at their destination.
SAN's address is N Harbour Dr.

McClellan-Palomar Airport (CLD)

Planning to leave from McClellan-Palomar Airport (CLD)? Direct San Diego to Denver International Airport (DEN) plane tickets can be booked from here.
United Airlines operates direct flights from San Diego to DEN leaving from CLD. Book your favourite seat and arrive at your destination in a single journey.
United is the most popular choice for passengers flying from CLD to DEN.
From central San Diego, CLD is roughly 48 kilometres away. When planning the best way to get there, find out if public transport is available or if it's more convenient to drive.
Got a crack-of-dawn departure? You might like to check in to one of these accommodation options near McClellan-Palomar Airport the day before your San Diego to DEN flight:
McClellan-Palomar Airport has a solid reputation for punctual service. 88% of flights leaving here meet their scheduled arrival times without fail.

About Denver International Airport (DEN)

Have a late flight from San Diego to Denver International Airport? Don't let it rob you of real rest. Stay within easy reach of DEN at Baymont by Wyndham Denver International Airport.
Booking your ride around one week in advance of your San Diego to Denver International Airport flight can help you get a cheaper deal.
DEN is located at 8500 Pena Boulevard.

Getting from Denver International Airport (DEN) to central Denver

Central Denver is around 40 kilometres from Denver International Airport and takes about 35 minutes to reach by car. Look into how to get from the airport to the city, whether that's with a car hire, taxi or ride-share.
Travelling by public transport takes around 35 minutes.

How to find the cheapest flights from San Diego to Denver International Airport (DEN)

The lowest price we've found for a one-way ticket from San Diego to Denver International Airport is 28 €. For a return flight on this route, the best price is 69 €. Depending on the availability and when you book, these fares can change.
To find cheap flights from San Diego to DEN, book early. Airlines typically offer lower fares when flights are first released.
The 'Whole month' tool will show you the cheapest San Diego to Denver International Airport tickets across every month. It's a good way to find a bargain if your dates aren't set in stone.
Save time looking for cheap plane tickets from San Diego to DEN by setting up a Price Alert. We'll send you an email or notification on the app when a new discounted fare appears.
Filters make it easier to dig up a deal for your flight from San Diego to Denver International Airport. Choose the departure times, carriers and stops that match your plans. Then sort the results by 'Cheapest' to find the best price quickly.

The best time to fly from San Diego to Denver International Airport (DEN)

July is when most people book flights from San Diego to Denver International Airport (DEN). Plan your visit to Denver in December if you'd rather be there when it's quieter.
The warmest month in Denver is July, with temperatures ranging between 14ºC (57ºF) and 32ºC (90ºF). Book your San Diego to DEN plane ticket then if you enjoy this type of weather.
January has temperatures of between -9ºC (16ºF) and 7ºC (45ºF). Search for cheap tickets from San Diego to Denver International Airport around that time if you want to travel in cooler conditions.

More about Denver

When it comes to looking for somewhere to rest your head, you'll find the best stays in Denver right here. Browse these options once you've booked your flight from San Diego to Denver International Airport:
There are so many things to discover in this city, it can be hard to work out where to start. Denver Art Museum, Meow Wolf Denver's Convergence Station and Ballpark are leading attractions which should be on any good Denver itinerary.

Explore more of the United States

Colorado Springs is just one of the many cities in the United States waiting to be discovered once you've taken in the sights of Denver. Around 113 kilometres away to the south, its top attractions include Garden of the Gods, Pikes Peak Region Attractions and Red Rock Canyon.
If you're eager to discover another corner of the United States, consider Pueblo, roughly 177 kilometres south of Denver. Rosemount Museum, Cathedral of the Sacred Heart and Sangre de Cristo Arts & Conference Centre are key reasons to visit.