Cheap Flights from San Diego International to Denver International

Compare San Diego International 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 International to Denver International

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

Find the cheapest month to fly from San Diego International 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 International to Denver International flights are currently cheapest in March.

Direct flights from San Diego International to Denver International

San Diego International to Denver International: Alternative routes

Compare routes from San Diego International 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 foundRs6,134
Cheapest month to flyMarch
Average flight time2 hrs, 29 mins
Most popular airlineSouthwest Airlines
Average flights per week213

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

The best price we found for a return flight from San Diego International to Denver International is Rs12,802. 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 29 minutes is the average flight time from San Diego International to Denver International.
Southwest Airlines, Alaska Airlines and United fly direct from San Diego International to Denver International.
As of February 2026, there are 213 flights per week flying from San Diego International to Denver International.
The cheapest month to fly from San Diego International to Denver International is usually March.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Diego International Airport to Denver International Airport on Sunday, 15 March 2026.
Yes – the average flight time is 2 hours and 29 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.
Currently, Frontier Airlines offers the cheapest flight tickets to Denver International.

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

  • Around 2 hours 25 minutes is how long you can expect to be travelling on a direct flight from San Diego International Airport to Denver International Airport.

  • The timezone in Denver is UTC-6, which is one hour ahead of San Diego.

  • Each week, there are 123 San Diego International Airport to Denver International Airport flights. If you prefer to be on board early, opt for the 06:20 Southwest Airlines flight. If you'd rather make the most of your time before you fly, the last departure is at 21:25 with Frontier Airlines.

  • To ensure you get on your SAN to DEN flight, allow plenty of time to check in and drop off your luggage. Arriving two hours ahead of international departures and an hour before domestic flights is the general travel rule.

  • You can expect bigger queues in popular months like July. Arriving up to four hours in advance for an international flight and two hours for domestic departures will help ensure a smooth travel experience.

  • You'll find a range of airlines offering direct flights from San Diego International Airport to Denver International Airport. When you're ready to start your Denver adventure, let one of these carriers take you to this popular corner of United States:

  • The airline that tops the list for bookings on this route is Frontier Airlines.

  • United Airlines stands out as the most punctual carrier for SAN to DEN flights, with 80.0% of its services arriving as scheduled.

  • We make it a cinch to book a flight with a stopover. To see all your options for tickets from San Diego International Airport to Denver International Airport, uncheck 'Direct flights only.' Then, pick a flight with a stop long enough to explore the city of your choice. Top stopovers between SAN and DEN include:

    • Colorado Springs Municipal Airport

    • Phoenix Sky Harbour International Airport

    • Harry Reid Airport (formerly McCarran Airport)

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

  • The lowest price we've seen for a one-way San Diego International Airport to Denver International Airport flight is Rs6,134. A round-trip fare right now is Rs12,802. Depending on the availability when you book, these fares could change.

  • Book six months before travelling. After crunching the numbers on our calendar, this is how far you should book ahead to secure cheap tickets from SAN to DEN.

  • Plan your trip for May. That's the cheapest month for flights from San Diego International Airport to Denver International Airport. If you're flexible with your travel dates, use the 'Whole month' tool to find the lowest airfare across each month.

  • You won't have to check back in every day to see if fares have gone down when you create a Price Alert. We'll send you an update the moment there's a better deal on cheap flights from SAN to DEN.

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

Handy information about San Diego International Airport (SAN)

  • SAN is located at Airport Drive.

  • When it comes to San Diego International Airport's on-time performance, data shows 71.38% of flights meet their scheduled arrival time.

  • Central San Diego to San Diego International Airport is approximately 5 kilometres. Depending on traffic, it'll take you about 10 minutes to get there if you're ride-sharing, catching a cab or driving.

  • The trip when using public transport takes about 20 minutes.

  • Looking for a convenient hotel close to SAN? If you've booked an early flight from San Diego International Airport to Denver International Airport, these accommodation options will have you sleeping moments from your check-in counter:

Arriving at Denver International Airport (DEN)

  • Once your San Diego International Airport to Denver International Airport flight has touched down, relax at a nearby hotel. Baymont by Wyndham Denver International Airport is a comfy option that's not too far from DEN.

  • Travel at your own speed with a Denver International Airport rental car. Book your wheels from Routes Car Rentals, Dollar or Budget and find adventure across Denver and beyond.

  • Get the best deal by reserving your ride from Denver International Airport about one week ahead of your departure.

Getting from Denver International Airport (DEN) to central Denver

  • DEN is located at 8500 Pena Boulevard.

  • Denver International Airport to the centre of Denver has a drive time of about 35 minutes. It's approximately 40 kilometres away.

  • It'll take around 1 hour 30 minutes if you're travelling by public transport.

When to fly to Denver International Airport (DEN)

  • The quietest month for a flight from San Diego International Airport to Denver International Airport is April, while July is the busiest. Pick the best time to visit Denver based on whether you prefer a more relaxed vibe or a faster pace.

  • Before locking in your flight from San Diego International Airport to Denver International Airport, consider the type of weather you enjoy. July is the warmest month in Denver, with temperatures ranging from 14ºC to 32ºC.

  • January has average temperatures of between -9ºC and 7ºC. Look for cheap tickets from SAN to DEN sometime then if you want to travel when it's cooler.

Explore more of United States

  • Denver is always a good idea, but there are so many other corners of United States you should also see. About 105 kilometres south of Denver, a trip to Colorado Springs will keep you on the go. Start with attractions like US Northern Command (USNORTHCOM) / North American Aerospace Defence Command (NORAD) Headquarters, Cheyenne Mountain Air Force Station and National Strength and Conditioning Association (NSCA).

  • Aurora is another favourite destination in United States and is around 13 kilometres east of Denver. No trip is complete without dropping by Magellan's Travel Solutions and Gear, The Fairways at Lowry and Retired Enlisted Association Inc.

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