Cheap flights from Denver International to San Diego

Compare Denver International to San Diego flight deals

Find the cheapest month or even day of the year to fly to San Diego

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Flight deals from Denver International to San Diego

Looking for a cheap last-minute deal or the best return flight from Denver International to San Diego? Find the lowest prices on one-way and return tickets right here.

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

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

Direct flights from Denver International to San Diego

Alternative Denver International to San Diego routes

Looking for the cheapest, fastest or easiest route from Denver International to San Diego? You could fly into the following airports instead.

Denver to San Diego: Flight information

The things to know before you go.
Cheapest flight found$29
Cheapest month to flyMarch
Average flight time2 hrs, 35 mins
Most popular airlineSouthwest Airlines
Average flights per week474

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

There are 2 airports in San Diego: San Diego International and McClellan-Palomar.
The best price we found for a return flight from Denver International to San Diego is $58. 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.
2 hours and 34 minutes is the average flight time from Denver International to San Diego.
Southwest Airlines, Alaska Airlines and SkyWest Airlines fly direct from Denver International to San Diego.
As of February 2026, there are 474 flights per week flying from Denver International to San Diego.
The cheapest month to fly from Denver International to San Diego is usually March.
If you're flying from Denver International Airport, the cheapest airport near San Diego is San Diego International – which is 4.1 km away from the centre of San Diego. We've found flights into this airport from $58.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Denver International Airport to San Diego on Thursday, 5 March 2026.
Yes – the average flight time is 2 hours and 34 minutes.
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 San Diego 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.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Diego is around 40 days in advance, so don’t leave your flight to the last minute.
In February, the average temperature is usually around 13°C. August is typically the warmest month in San Diego, when it usually averages around 28°C. You can expect the least rain in June. The coldest month is December, with temperatures averaging 10°C. The rainiest month is February.
Currently, Frontier Airlines offers the cheapest flight tickets to San Diego.

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

  • Expect to be travelling for 2 hours 25 minutes. That's the average time for a direct flight from Denver International Airport to San Diego.

  • San Diego is one hour behind Denver, where Denver International Airport is located. San Diego runs on the UTC-7 timezone.

  • Denver International Airport (DEN) to San Diego International Airport (SAN) is the most popular route, with 78 departures a week to pick from. If you prefer a later start to the day, the last flight from DEN to SAN is with Frontier Airlines at 22:46. Choose the first departure operated by Southwest Airlines at 05:40 if you want to get on your way earlier.

  • To avoid rushing for your DEN to San Diego flight, leave enough time for things like check-in and baggage drop. Arriving two hours before international departures and one hour before domestic flights is the general travel rule.

  • Longer lines at security and check-in are more likely if you're travelling during high season, so give yourself a bit more breathing room. A good rule of thumb for peak times? Arrive up to four hours ahead for international flights and two hours for domestic departures.

  • Direct Denver International Airport to San Diego tickets are available for booking. San Diego International Airport (SAN) is where you'll complete your journey.

  • You'll have your choice of airlines operating direct flights from Denver International Airport to San Diego. Get on board with any of these:

  • Located around 31 kilometres from the centre of Denver, DEN can be reached in about 35 minutes by car, depending on traffic. Travelling on public transport will take roughly 1 hour 30 minutes.

  • Get your flight from Denver International Airport to San Diego off to a stress-free start. Just a quick drive from DEN, spend the night at The Westin Denver International Airport and be well-rested for the journey ahead.

  • Denver International Airport has an excellent on-time record, reducing the likelihood of delays. Departures from DEN land on schedule 80.23% of the time.

  • You'll find DEN at 8500 Pena Boulevard.

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

  • $29 is the cheapest price we've found for a one-way Denver International Airport to San Diego flight. A return plane ticket right now is $58. Depending on when you book and the availability, these fares can change.

  • Lock in cheap flights from DEN to San Diego by booking one month ahead. Based on our research, that's the best time for landing a bargain.

  • The best month for finding cheap Denver International Airport to San Diego tickets is May. Use the 'Whole month' tool to compare prices, then choose the dates that offer the lowest fares.

  • You don't need to check back in every day to find out if fares have dropped when you set up a Price Alert. We'll update you as soon as there's an even bigger deal on cheap flights from DEN to San Diego.

  • Select your ideal arrival and departure times, number of stops and airlines with our filters. Then, sort the results for your flight from Denver International Airport to San Diego by 'Cheapest,' 'Fastest' or 'Best.'

Airports in San Diego

San Diego International Airport (SAN)

  • The distance from San Diego International Airport (SAN) to central San Diego is roughly 5 kilometres. It takes around 10 minutes to get to the centre driving.

  • Travelling to the centre by public transport will take you around 20 minutes.

  • If you have a late flight from Denver International Airport to San Diego, few things beat the convenience of staying near the terminal. Grab your luggage from the carousel and then be showered and snoozing soon after at one of these accommodation options near SAN:

  • Follow your own route with a San Diego International Airport rental car. Pick up a set of wheels from Thrifty, Dollar or Budget and chase adventure across San Diego and beyond.

  • Booking your vehicle from San Diego International Airport about two weeks before your flight from DEN to San Diego can help you get the lowest rate.

  • SAN is located at N Harbour Dr.

McClellan-Palomar Airport (CLD)

  • Once your flight from Denver International Airport to San Diego has landed, you can make your way to the city centre in around 40 minutes by car. Central San Diego is roughly 56 kilometres from McClellan-Palomar Airport (CLD).

  • Travelling by public transport will take around 2 hours 15 minutes.

  • Hang the 'Do not disturb' sign on your door and unwind at a hotel near CLD. Here are a few options where you can take a load off after your DEN to San Diego flight:

  • Budget, Hertz and Avis make collecting a McClellan-Palomar Airport rental car quick and easy. These companies are located in or around the terminal and will have you ready to go in a flash.

  • Generally speaking, the earlier you book, the better the prices and selection of vehicles. Reserve your ride from CLD once your travel dates are set.

Best time to go to San Diego

  • Carefully consider your trip dates before locking in your flight from Denver International Airport to San Diego. The city comes alive in peak season, but rates are often higher and major attractions can get busy. Plan your trip to San Diego in the low season if you like a quieter vibe.

  • The warmest month in San Diego is August, with temperatures ranging between 17ºC (63ºF) and 28ºC (82ºF). Lock in your Denver International Airport to San Diego plane ticket then if that's your ideal forecast.

  • February sees average temperatures of between 7ºC (45ºF) and 23ºC (73ºF). Look for a cheap ticket from DEN to San Diego around that time if you want to travel in cooler conditions.

More about San Diego

  • When it comes to searching for somewhere to lay your head, you'll find the best places to stay in San Diego right here. Browse these options after you've booked your flight from Denver International Airport to San Diego:

  • Every great journey has to include some sightseeing. USS Midway Museum, San Diego Zoo and SeaWorld San Diego are essential stops on your San Diego itinerary.

Explore more of United States

  • Los Angeles is just one of the many cities in United States waiting to be explored once you've taken in the sights of San Diego. Around 177 kilometres away to the north-west, well-known attractions include Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • If you're ready to explore another well-known destination in United States, head for Phoenix, about 483 kilometres east of San Diego. Desert Botanical Garden, Heard Museum and Papago Park are the start of reasons to visit.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.