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Cheap Flights from Denver International to San Diego International

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Compare Denver International to San Diego International flight deals

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

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Flight deals from Denver International to San Diego International

Looking for a cheap last-minute deal or the best return flight from Denver International to San Diego International? Find the lowest prices on one-way and return tickets right here.
San Diego.71 € per passenger.Departing Tue, 12 Aug, returning Mon, 18 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Tue, 12 Aug, arriving in San Diego International.Inbound direct flight with Frontier Airlines departs from San Diego International on Mon, 18 Aug, arriving in Denver International.Price includes taxes and charges.From 71 €, select.
San Diego.74 € per passenger.Departing Thu, 25 Sep, returning Mon, 29 Sep.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Thu, 25 Sep, arriving in San Diego International.Inbound direct flight with Frontier Airlines departs from San Diego International on Mon, 29 Sep, arriving in Denver International.Price includes taxes and charges.From 74 €, select.
San Diego.82 € per passenger.Departing Tue, 26 Aug, returning Wed, 3 Sep.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Denver International on Tue, 26 Aug, arriving in San Diego International.Inbound direct flight with Southwest Airlines departs from San Diego International on Wed, 3 Sep, arriving in Denver International.Price includes taxes and charges.From 82 €, select.
San Diego.113 € per passenger.Departing Wed, 16 Jul, returning Wed, 30 Jul.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Wed, 16 Jul, arriving in San Diego International.Inbound direct flight with Frontier Airlines departs from San Diego International on Wed, 30 Jul, arriving in Denver International.Price includes taxes and charges.From 113 €, select.
San Diego.123 € per passenger.Departing Wed, 9 Jul, returning Mon, 13 Oct.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Wed, 9 Jul, arriving in San Diego International.Inbound direct flight with Frontier Airlines departs from San Diego International on Mon, 13 Oct, arriving in Denver International.Price includes taxes and charges.From 123 €, select.
San Diego.130 € per passenger.Departing Mon, 28 Jul, returning Sat, 2 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Mon, 28 Jul, arriving in San Diego International.Inbound direct flight with Frontier Airlines departs from San Diego International on Sat, 2 Aug, arriving in Denver International.Price includes taxes and charges.From 130 €, select.
San Diego.134 € per passenger.Departing Mon, 6 Oct, returning Mon, 13 Oct.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Mon, 6 Oct, arriving in San Diego International.Inbound direct flight with Frontier Airlines departs from San Diego International on Mon, 13 Oct, arriving in Denver International.Price includes taxes and charges.From 134 €, select.
San Diego.138 € per passenger.Departing Wed, 12 Nov, returning Wed, 12 Nov.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Denver International on Wed, 12 Nov, arriving in San Diego International.Inbound direct flight with Southwest Airlines departs from San Diego International on Wed, 12 Nov, arriving in Denver International.Price includes taxes and charges.From 138 €, select.

Find the cheapest month to fly from Denver International 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 International to San Diego International flights are currently cheapest in August.
Jun
from 156 €
Jul
from 113 €
Aug
from 71 €
Sep
from 74 €
Oct
from 134 €
Nov
from 138 €
Dec
from 239 €
Jan
from 242 €
Feb
from 244 €
Mar
from 242 €
Apr
Find prices
May
Find prices

Direct flights from Denver International to San Diego International

Denver International to San Diego International: Alternative routes

Compare routes from Denver International 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 found71 €
Cheapest month to flyAugust
Average flight time2 hrs, 26 mins
Most popular airlineSouthwest Airlines
Average flights per week181

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

The best price we found for a return flight from Denver International to San Diego International is 71 €. 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 26 minutes is the average flight time from Denver International to San Diego International.
Southwest Airlines, United and Air Canada fly direct from Denver International to San Diego International.
As of June 2025, there are 181 flights per week flying from Denver International to San Diego International.
The cheapest month to fly from Denver International to San Diego International is usually June 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Denver International Airport to San Diego International Airport on Tuesday, 12 August 2025.
Yes – the average flight time is 2 hours and 26 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.
Currently, Frontier Airlines offers the cheapest flight tickets to San Diego International.

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

  • The average length of a direct flight from Denver International Airport to San Diego International Airport is 2 hours 25 minutes.

  • The timezone in San Diego is UTC-7, which is one hour behind Denver.

  • Each week, there are 123 Denver International Airport to San Diego International Airport flights. If you want to get going as soon as possible, jump on the 05:01 Frontier Airlines flight. If you'd rather make the most of your time before flying, the latest flight is at 22:05 with Southwest Airlines.

  • Your DEN to SAN flight won't wait if you're 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.

  • During popular months such as July, it's a good idea to get to the airport even earlier. Arrive two hours before domestic departures and four hours ahead for an international flight when you travel during a high season in general.

  • You can fly nonstop to San Diego, United States. Jet off with one of these airlines that operate direct flights from Denver International Airport to San Diego International Airport:

  • The majority of passengers choose to fly with Frontier Airlines on this route.

  • Frontier Airlines is the most punctual carrier operating DEN to SAN flights, with 79.85% of its services arriving as scheduled.

  • If you want to include a stop along the way, simply uncheck 'Direct flights only' when searching for your ticket from Denver International Airport to San Diego International Airport. Here are the top stopovers between DEN and SAN:

    • Harry Reid Airport (formerly McCarran Airport)

    • Phoenix Sky Harbour International Airport

    • Los Angeles International Airport

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

  • The cheapest price we've found for a one-way Denver International Airport to San Diego International Airport flight is 41 €. A return ticket right now is 71 €. Depending on the availability and when you book, these fares may change.

  • To secure cheap tickets from DEN to SAN, reserve your journey six months before your departure date.

  • The cheapest month for flights from Denver International Airport to San Diego International Airport is May. Use the 'Whole month' tool to find the lowest prices if you have flexible dates.

  • Landing cheap flights from DEN to SAN is a piece of cake with Price Alerts. All you need to do is set up one of these automatic alerts and we'll let you know when there's a better deal.

  • Select your preferred arrival and departure times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to find the best deals on flights from Denver International Airport to San Diego International Airport.

Handy information about Denver International Airport (DEN)

  • DEN's address is 8500 Pena Boulevard.

  • Denver International Airport maintains a solid on-time performance, so you're less likely to experience disruptions. Departures from DEN land at their destination as scheduled 80.23% of the time.

  • Central Denver to Denver International Airport is around 40 kilometres. Depending on traffic, it'll take about 35 minutes to get there if you're ride-sharing, catching a cab or driving.

  • You can expect a trip time of around 1 hour 30 minutes on public transport.

  • Get your flight from Denver International Airport to San Diego International Airport off to a relaxed start. Just a short drive from DEN, stay at Baymont by Wyndham Denver International Airport and be well-rested for the trip ahead.

Arriving at San Diego International Airport (SAN)

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

  • SAN is located at Airport Drive.

  • San Diego International Airport is approximately 5 kilometres from the centre of San Diego. The drive time takes about 10 minutes.

  • If you're taking public transport, expect a journey of about 20 minutes.

When to fly to San Diego International Airport (SAN)

  • July is the most popular month for flights from Denver International Airport to San Diego International Airport. To skip the crowds, go to San Diego in May.

  • When reserving your flight from Denver International Airport to San Diego International Airport, consider the type of weather you like. August is the warmest month in San Diego, with temperatures ranging from 17ºC (63ºF) to 28ºC (82ºF).

  • February has average temperatures of between 7ºC (45ºF) and 23ºC (73ºF). Look for cheap tickets from DEN to SAN sometime then if you like cooler conditions.

Explore more of United States

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

  • If you're looking 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.

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.