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Cheap Flights from Denver to San Diego International

Compare Denver to San Diego International flight deals

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

Book the best San Diego International fare with no extra fees

Flight deals from Denver to San Diego International

Looking for a cheap last-minute deal or the best return flight from Denver to San Diego International? Find the lowest prices on one-way and return tickets right here.
San Diego.R 677 per passenger.Departing Tue, 21 Oct.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Tue, 21 Oct, arriving in San Diego International.Price includes taxes and charges.From R 677, select.
San Diego.R 677 per passenger.Departing Sat, 1 Nov.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Sat, 1 Nov, arriving in San Diego International.Price includes taxes and charges.From R 677, select.
San Diego.R 708 per passenger.Departing Sat, 13 Dec.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Sat, 13 Dec, arriving in San Diego International.Price includes taxes and charges.From R 708, select.
San Diego.R 711 per passenger.Departing Wed, 14 Jan.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Wed, 14 Jan, arriving in San Diego International.Price includes taxes and charges.From R 711, select.
San Diego.R 783 per passenger.Departing Wed, 18 Feb.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Wed, 18 Feb, arriving in San Diego International.Price includes taxes and charges.From R 783, select.
San Diego.R 1,373 per passenger.Departing Mon, 29 Sep.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Mon, 29 Sep, arriving in San Diego International.Price includes taxes and charges.From R 1,373, select.
San Diego.R 2,381 per passenger.Departing Tue, 10 Mar.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Denver International on Tue, 10 Mar, arriving in San Diego International.Price includes taxes and charges.From R 2,381, select.
San Diego.R 2,384 per passenger.Departing Thu, 4 Jun.One-way flight with United.Outbound direct flight with United departs from Denver International on Thu, 4 Jun, arriving in San Diego International.Price includes taxes and charges.From R 2,384, select.

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

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Denver to San Diego International flights are currently cheapest in October.
Sep
from R 1,373
Oct
from R 677
Nov
from R 677
Dec
from R 708
Jan
from R 711
Feb
from R 783
Mar
from R 2,381
Apr
from R 2,408
May
Find prices
Jun
from R 2,384
Jul
Find prices
Aug
Find prices

Direct flights from Denver to San Diego International

Denver to San Diego International: Alternative routes

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

Denver to San Diego: Flight information

The things to know before you go.
Cheapest flight foundR 677
Cheapest month to flyOctober
Average flight time2 hrs, 30 mins
Most popular airlineSouthwest Airlines
Average flights per week199

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

The best price we found for a return flight from Denver to San Diego International is R 1,342. 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 30 minutes is the average flight time from Denver to San Diego International.
Southwest Airlines, Hawaiian Airlines and Alaska Airlines fly direct from Denver to San Diego International.
As of September 2025, there are 199 flights per week flying from Denver to San Diego International.
The cheapest month to fly from Denver to San Diego International is usually October.
Yes – the average flight time is 2 hours and 30 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 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.
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.
The cheapest airline that flies to San Diego International is Frontier Airlines .

Flying from Denver to San Diego International Airport (SAN): What you need to know

  • Denver's main airport is Denver International Airport (DEN). Check out your departure options from this terminal when reserving your flights from Denver to San Diego International Airport (SAN).

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

  • San Diego International Airport is located in San Diego. The city runs on the UTC-7 timezone and is one hour behind Denver.

  • With 78 direct weekly flights between the two airports, Denver International Airport (DEN) to San Diego International Airport (SAN) is the most popular route. Southwest Airlines operates the earliest flight at 5:40am. If you prefer to make the most of your day before leaving, the latest departure from DEN to SAN is with Frontier Airlines at 10:46pm.

  • Arrive at the airport on time so you don't miss your flight from Denver to SAN. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid sprinting to your gate.

  • If you're taking off during a bank holiday or other peak period, give yourself extra time. Arrive two hours before domestic flights and up to four hours before international departures. Check-in and security lines will be longer.

Airports in Denver

Denver International Airport (DEN)

  • Reach your destination without the detour from Denver International Airport (DEN). Nonstop flights from Denver to San Diego International Airport (SAN) are available from here.

  • You'll have your pick of carriers operating direct flights from Denver to San Diego International Airport leaving from DEN. Head off on your trip with any of these:

  • The preferred airline for passengers flying between DEN and SAN is United Airlines.

  • Frontier Airlines is the most punctual carrier on this route, with 79.85% of its services arriving as planned.

  • Located around 40 kilometres from central Denver, DEN can be reached in about 35 minutes by car, depending on traffic. The journey on public transport takes roughly 1 hour 30 minutes.

  • Spending the night in a hotel can take the hassle out of getting to the airport on time. If you're searching for a place to stay before your flight from Denver to San Diego International Airport, consider Baymont by Wyndham Denver International Airport. It's an easy drive from Denver International Airport.

  • 80.23% of flights departing from Denver International Airport reach their destination on schedule. Given its impressive on-time stats, you're unlikely to experience delays when jetting out of DEN.

  • You'll find DEN at 8500 Pena Boulevard.

About San Diego International Airport (SAN)

Getting from San Diego International Airport (SAN) to central San Diego

  • San Diego International Airport to central San Diego is around 3 kilometres. If you're getting a cab or renting a car, do a little research to make your trip as smooth as possible. Journey times vary based on traffic and the time of day.

  • If you're travelling on public transport, expect a journey of around 20 minutes.

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

  • The cheapest price we've found for a one-way ticket from Denver to San Diego International Airport is R 677. For a return flight on this route, the best price is R 1,342. Depending on the availability and when you book, these fares could change.

  • To find cheap flights from Denver to SAN, book in advance. Airlines typically offer lower fares when flights first go on sale.

  • If you're flexible with your travel plans, use the 'Whole month' search tool. It'll give you the cheapest price across every month when searching for your Denver to San Diego International Airport ticket.

  • Locking in a cheap plane ticket from Denver to SAN is a piece of cake with Price Alerts. All you need to do is create one of these automatic alerts and we'll let you know as soon as there's a price drop.

  • Hunt for savings on a flight from Denver to San Diego International Airport with the help of the filters. Pick your ideal departure and arrival times, airlines and number of stops. You can also sort your results by 'Fastest,' 'Cheapest' or 'Best.'

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

  • It's time to work out when to book your flight from Denver to San Diego International Airport (SAN). July is the busiest month to travel to San Diego. If you prefer a quieter vibe, think about going in May.

  • Before locking in your Denver to SAN plane ticket, consider what kind of weather you prefer. August is the warmest month in San Diego, with temperatures ranging from 17ºC (63ºF) to 28ºC (82ºF).

  • If you'd rather travel in cooler conditions, search for a cheap ticket from Denver to San Diego International Airport in February when temperatures are between 7ºC (45ºF) and 23ºC (73ºF).

More about San Diego

  • Once you've booked your flight from Denver to San Diego International Airport, find a hotel that keeps you close to what you want to see. Make one of these accommodation options your base for exploring San Diego:

  • San Diego Zoo and San Diego Balboa Park are just the start of the popular attractions to put on your San Diego must-do list. Keep the momentum going by heading to USS Midway Museum.

Explore more of the United States

  • Los Angeles is just one of the many places in the United States waiting to be discovered once you've taken in the sights of San Diego. Around 177 kilometres away to the north-west, its best attractions include Hollywood Sign, Griffith Observatory and Hollywood Bowl.

  • Long Beach is another favourite destination in the United States and is around 145 kilometres north-west of San Diego. No journey is complete without visiting SkyThrills! - Fly a Real Fighter Aircraft & Become A Fighter Pilot For A Day! Long Beach, CA, Queen Mary and The Queen Mary.

Plan the rest of your trip from Denver to San Diego

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