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Cheap Flights from San Diego to Denver International

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Compare San Diego to Denver International flight deals

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

Book the best Denver International fare with no extra fees

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? Find the lowest prices on one-way and return tickets right here.
Denver.Rs17,954 per passenger.Departing Sat, 17 May.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Sat, 17 May, arriving in Denver International.Price includes taxes and charges.From Rs17,954, select.
Denver.Rs17,954 per passenger.Departing Tue, 3 Jun.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Tue, 3 Jun, arriving in Denver International.Price includes taxes and charges.From Rs17,954, select.
Denver.Rs19,356 per passenger.Departing Sat, 5 Jul.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Sat, 5 Jul, arriving in Denver International.Price includes taxes and charges.From Rs19,356, select.
Denver.Rs19,362 per passenger.Departing Sat, 16 Aug.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Sat, 16 Aug, arriving in Denver International.Price includes taxes and charges.From Rs19,362, select.
Denver.Rs20,793 per passenger.Departing Tue, 23 Sep.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Tue, 23 Sep, arriving in Denver International.Price includes taxes and charges.From Rs20,793, select.
Denver.Rs20,793 per passenger.Departing Tue, 14 Oct.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Tue, 14 Oct, arriving in Denver International.Price includes taxes and charges.From Rs20,793, select.
Denver.Rs38,868 per passenger.Departing Thu, 20 Nov.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from San Diego International on Thu, 20 Nov, arriving in Denver International.Price includes taxes and charges.From Rs38,868, select.
Denver.Rs41,580 per passenger.Departing Wed, 25 Mar.One-way flight with Delta.Outbound indirect flight with Delta, departs from San Diego International on Wed, 25 Mar, arriving in Denver International.Price includes taxes and charges.From Rs41,580, 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 May.
May
from Rs17,954
Jun
from Rs17,954
Jul
from Rs19,356
Aug
from Rs19,362
Sep
from Rs20,793
Oct
from Rs20,793
Nov
from Rs38,868
Dec
from Rs51,484
Jan
Find prices
Feb
Find prices
Mar
from Rs41,580
Apr
Find prices

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 foundRs17,954
Cheapest month to flyMay
Average flight time2 hrs, 28 mins
Most popular airlineSouthwest Airlines
Average flights per week372

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

The best price we found for a return flight from San Diego to Denver International is Rs35,904. 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 28 minutes is the average flight time from San Diego to Denver International.
Southwest Airlines, United and Air Canada fly direct from San Diego to Denver International.
As of May 2025, there are 186 flights per week flying from San Diego to Denver International.
The cheapest month to fly from San Diego to Denver International is usually May 2025.
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 Tuesday, 20 May 2025.
Yes – the average flight time is 2 hours and 28 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 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.
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.
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

  • Countless great adventures start 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) jetting off from either of these bases.

  • 2 hours 27 minutes is the time it takes on average for a direct flight from San Diego to Denver International Airport.

  • Denver International Airport is located in Denver. The city operates in the UTC-6 timezone and is 1 hour ahead of San Diego.

  • The most popular route is from San Diego International Airport (SAN) to Denver International Airport (DEN), with 123 direct weekly services. If you'd like to get going as soon as possible, the earliest flight from SAN to DEN is the 06:20 Southwest Airlines option. If you prefer to travel later, the last departure is at 21:25 with Frontier Airlines.

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

  • Peak months like July or holiday times such as Thanksgiving and Christmas will mean longer waits at check-in and security. If you're travelling then, play it safe and get to the terminal even earlier. Arriving two hours before a domestic flight and up four hours ahead of international flights is a smart move.

Airports in San Diego

San Diego International Airport (SAN)

  • San Diego International Airport (SAN) makes it easy to travel directly to your destination. Nonstop flights from San Diego to Denver International Airport (DEN) can be booked from this terminal.

  • Choose from a variety of airlines that operate direct flights from San Diego to Denver International Airport leaving from SAN. Book your ticket with one of these:

  • The distance from central San Diego to SAN is roughly 5 kilometres. Check out Google Maps for the quickest way to get there, whether you're driving or taking public transport.

  • Want a convenient hotel close to San Diego International Airport? If you've booked an early flight from San Diego to Denver International Airport, these accommodation options will have you sleeping moments from your departure gate:

About Denver International Airport (DEN)

  • Hop off your flight from San Diego to Denver International Airport and jump into your hotel bed soon after. If you need a comfortable option a short drive from DEN, head for SpringHill Suites Denver Airport.

Getting from Denver International Airport (DEN) to central Denver

  • Denver International Airport is approximately 40 kilometres from central Denver. With a car rental or if you're catching a cab, the drive is about 34 minutes.

  • Getting to the centre by public transport takes around 1 hour and 31 minutes.

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

  • For a one-way ticket from San Diego to Denver International Airport, Rs17,954 is the best price we've seen. You can also book a return trip from just Rs35,904. These are currently the lowest fares but are subject to change depending on availability.

  • 8 months is how far we recommend booking ahead to score cheap tickets from San Diego to DEN.

  • Schedule your trip for May. That's the cheapest month for tickets from San Diego to Denver International Airport. If your travel dates are flexible, use the 'Whole month' tool to find the best price across each month.

  • Locking in a cheap ticket from San Diego to DEN is a breeze with Price Alerts. Simply create one of these automatic alerts and we'll notify you when the price has fallen.

  • Use the filters to tailor your flights from San Diego to Denver International Airport. Simply enter your preferred departure and arrival times, number of stops and airlines. You can also sort your results by 'Cheapest' to find the best deals.

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

  • July is the busiest month for flights from San Diego to Denver International Airport. To skip the crowds, visit Denver in April when things are quieter.

  • Think about the type of weather that'll work with your plans for Denver. The warmest month is July. Book your flights from San Diego to DEN during then and you can expect temperatures of between 14ºC and 32ºC.

  • If you want to travel in cooler conditions, search for a cheap flight from San Diego to Denver International Airport in January when temperatures average between -9ºC and 7ºC.

More about Denver

  • Start your Denver trip off on the right foot by choosing the perfect place to stay. As soon as you've booked your flight from San Diego to Denver International Airport, explore our range of hotels including:

  • All great journeys should include some sightseeing. Denver Art Museum, Union Station and Denver Botanic Gardens are essential stops on your Denver itinerary.

Complete your Denver trip with a car rental

  • We use the same magic that helped you find your cheap flight from San Diego to Denver International Airport to track down your ideal ride. Browse our car rentals in Denver and easily compare your options. Plus you'll find all the info you need to know, from the most popular car type to the best time to book.

Plan the rest of your trip from San Diego to Denver

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