46 € Cheap Flights from San Diego to Denver

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Flight deals from San Diego to Denver

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

Denver.46 € per passenger.Departing Thu, 4 Dec, returning Mon, 8 Dec.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Thu, 4 Dec, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Mon, 8 Dec, arriving in San Diego International.Price includes taxes and charges.From 46 €, select.

Denver.46 € per passenger.Departing Thu, 6 Nov, returning Sun, 9 Nov.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Thu, 6 Nov, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Sun, 9 Nov, arriving in San Diego International.Price includes taxes and charges.From 46 €, select.

Denver.46 € per passenger.Departing Fri, 20 Feb, returning Mon, 23 Feb.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Fri, 20 Feb, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Mon, 23 Feb, arriving in San Diego International.Price includes taxes and charges.From 46 €, select.

Denver.46 € per passenger.Departing Thu, 22 Jan, returning Mon, 26 Jan.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Thu, 22 Jan, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Mon, 26 Jan, arriving in San Diego International.Price includes taxes and charges.From 46 €, select.

Denver.46 € per passenger.Departing Tue, 30 Dec, returning Thu, 1 Jan.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Tue, 30 Dec, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Thu, 1 Jan, arriving in San Diego International.Price includes taxes and charges.From 46 €, select.

Denver.51 € per passenger.Departing Wed, 29 Oct, returning Sat, 1 Nov.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Wed, 29 Oct, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Sat, 1 Nov, arriving in San Diego International.Price includes taxes and charges.From 51 €, select.

Denver.53 € per passenger.Departing Tue, 28 Oct, returning Wed, 29 Oct.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Tue, 28 Oct, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Wed, 29 Oct, arriving in San Diego International.Price includes taxes and charges.From 53 €, select.

Denver.80 € per passenger.Departing Wed, 26 Nov, returning Mon, 1 Dec.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from San Diego International on Wed, 26 Nov, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Mon, 1 Dec, arriving in San Diego International.Price includes taxes and charges.From 80 €, select.

Denver.100 € per passenger.Departing Tue, 30 Dec, returning Sun, 1 Feb.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from San Diego International on Tue, 30 Dec, arriving in Denver International.Inbound direct flight with Southwest Airlines departs from Denver International on Sun, 1 Feb, arriving in San Diego International.Price includes taxes and charges.From 100 €, select.

Denver.100 € per passenger.Departing Thu, 29 Jan, returning Sun, 1 Feb.Return flight with United.Outbound direct flight with United departs from San Diego International on Thu, 29 Jan, arriving in Denver International.Inbound direct flight with United departs from Denver International on Sun, 1 Feb, arriving in San Diego International.Price includes taxes and charges.From 100 €, select.

Denver.101 € per passenger.Departing Fri, 27 Feb, returning Sun, 1 Mar.Return flight with United.Outbound direct flight with United departs from San Diego International on Fri, 27 Feb, arriving in Denver International.Inbound direct flight with United departs from Denver International on Sun, 1 Mar, arriving in San Diego International.Price includes taxes and charges.From 101 €, select.

Denver.138 € per passenger.Departing Wed, 15 Apr, returning Wed, 22 Apr.Return flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from San Diego International on Wed, 15 Apr, arriving in Denver International.Inbound direct flight with Alaska Airlines departs from Denver International on Wed, 22 Apr, arriving in San Diego International.Price includes taxes and charges.From 138 €, select.

Denver.191 € per passenger.Departing Fri, 13 Mar, returning Tue, 17 Mar.Return flight with Hawaiian Airlines and Alaska Airlines.Outbound direct flight with Hawaiian Airlines departs from San Diego International on Fri, 13 Mar, arriving in Denver International.Inbound direct flight with Alaska Airlines departs from Denver International on Tue, 17 Mar, arriving in San Diego International.Price includes taxes and charges.From 191 €, select.

Denver.237 € per passenger.Departing Wed, 17 Jun, returning Sun, 21 Jun.Return flight with United.Outbound direct flight with United departs from San Diego International on Wed, 17 Jun, arriving in Denver International.Inbound direct flight with United departs from Denver International on Sun, 21 Jun, arriving in San Diego International.Price includes taxes and charges.From 237 €, select.

Denver.238 € per passenger.Departing Mon, 31 Aug, returning Mon, 7 Sep.Return flight with United.Outbound direct flight with United departs from San Diego International on Mon, 31 Aug, arriving in Denver International.Inbound direct flight with United departs from Denver International on Mon, 7 Sep, arriving in San Diego International.Price includes taxes and charges.From 238 €, select.

Denver.238 € per passenger.Departing Tue, 30 Jun, returning Sun, 5 Jul.Return flight with United.Outbound direct flight with United departs from San Diego International on Tue, 30 Jun, arriving in Denver International.Inbound direct flight with United departs from Denver International on Sun, 5 Jul, arriving in San Diego International.Price includes taxes and charges.From 238 €, select.

Find the cheapest month to fly from San Diego to Denver

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

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Direct flights from San Diego to Denver

Alternative San Diego to Denver routes

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

San Diego to Denver: Flight information

The things to know before you go.

Cheapest flight found	46 €
Cheapest month to fly	November
Average flight time	2 hrs, 29 mins

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

How many airports are there in Denver?

There are 4 airports in Denver: Denver Arapahoe Co, Broomfield, Denver International, and Northern Colorado Regional.

How much are return flights from San Diego to Denver?

The best price we found for a return flight from San Diego to Denver is 46 €. 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.

How long does it take to fly from San Diego to Denver?

2 hours and 29 minutes is the average flight time from San Diego to Denver.

Which airlines fly direct from San Diego to Denver?

Southwest Airlines, United and Air Canada fly direct from San Diego to Denver.

How many flights are there a week from San Diego to Denver?

As of October 2025, there are 193 flights per week flying from San Diego to Denver.

When is the cheapest time to fly from San Diego to Denver?

The cheapest month to fly from San Diego to Denver is usually November.

Which is the cheapest airport to fly into in Denver?

If you're flying from San Diego, the cheapest airport near Denver is Denver International – which is 29.9 km away from the centre of Denver. We've found flights into this airport from 46 €.

Which upcoming date is cheapest to fly from San Diego to Denver on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from San Diego to Denver on Thursday, 6 November 2025.

How can I get the best flight deal from San Diego to Denver?

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 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.

When is the best time to book flights to Denver?

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.

What’s the weather like in Denver?

In October, the average temperature is usually around 10°C. July is typically the warmest month in Denver, when it usually averages around 31°C. You can expect the least rain in January. The coldest month is December, with temperatures averaging -6°C. The rainiest month is July.

Which is the cheapest airline to fly from San Diego to Denver with?

The cheapest airline that flies to Denver is Frontier Airlines .

Travelling from San Diego to Denver: what you need to know

Begin your trip planning by checking out the ideal departure point for your flight from San Diego to Denver. Explore your options for setting off from San Diego International Airport (SAN) or McClellan-Palomar Airport (CLD), two of the city's main airports.
When it comes to where you'll disembark, Denver's major arrival point is Denver International Airport (DEN).
Jump on a direct San Diego to Denver flight and you'll be flying for an average of 2 hours 25 minutes.
Denver is one hour ahead of San Diego and is in the UTC-6 timezone.
With 78 flights a week between the two airports, San Diego International Airport (SAN) to Denver International Airport (DEN) is the busiest route. Board the earliest flight from San Diego to Denver with Southwest Airlines at 06:20. If you prefer to make the most of your day before flying, the last flight from SAN to DEN is with Southwest Airlines at 21:40.
For a stress-free journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This will give you enough time to board your San Diego to Denver flight.
You'll likely experience longer lines in popular months such as July. Arriving up to four hours in advance for international flights and two hours for domestic departures will help ensure a smooth travel experience.

How to find the cheapest flights from San Diego to Denver

24 € is currently the best price for a one-way ticket from San Diego to Denver. A return flight starts from 46 €. These prices may change based on demand.
To snag cheap San Diego to Denver flights, book your trip two months before your departure date.
May is the best month for nabbing an amazing deal on a plane ticket from San Diego to Denver. If you're looking to travel at a different time of year, the 'Whole month' tool will show you the lowest prices across every month.
Locking in a cheap flight from San Diego to Denver is easy with Price Alerts. Simply set up one of these automatic alerts and we'll get in touch when a better deal is available.
Pick your preferred arrival and departure times, number of stops and airlines with the filters. Alternatively, sort your San Diego to Denver flight results by 'Fastest,' 'Best' or 'Cheapest.'

Flying from San Diego

San Diego International Airport (SAN)

You can book a direct flight from San Diego to Denver leaving from San Diego International Airport (SAN). Begin your journey at SAN and come in for landing at Denver International Airport (DEN).
You'll find a variety of carriers offering direct San Diego to Denver plane tickets with departures from SAN, including:
SAN is around 3 kilometres from central San Diego. If you're ride-sharing, catching a cab or driving from the centre, it'll take you 10 minutes or so to get there, depending on traffic conditions. If you're taking public transport, expect the trip time to be around 20 minutes.
Catching an early flight from San Diego to Denver? Avoid the hassle of rushing to the terminal (and get some extra shut-eye) by choosing one of these stays close to San Diego International Airport:
71.38% of flights that take off from San Diego International Airport reach their destination on schedule.
SAN's address is N Harbour Dr.

Arriving in Denver

Denver International Airport (DEN)

The distance from Denver International Airport (DEN) to central Denver is approximately 29 kilometres. It takes around 35 minutes to reach the centre driving.
When travelling by public transport, expect a journey time of roughly 1 hour 30 minutes.
Get off your flight from San Diego to Denver and be relaxing in your hotel bed shortly after. If you're searching for a comfortable option that's not too far from DEN, head for The Westin Denver International Airport.
Follow your own route with a Denver International Airport rental car. Book your wheels from Routes Car Rentals, Dollar or Budget and see more of Denver and beyond.
To secure the lowest price, reserve your vehicle from Denver International Airport about one week in advance of your San Diego to Denver flight.
The address for DEN is 8500 Pena Boulevard.

Best time to go to Denver

July is the busiest month for flights from San Diego to Denver. To escape the crowds, head to Denver in April.
Book a San Diego to Denver ticket departing in July if you want to visit the city during its warmest month. Expect temperatures in Denver to range from 14ºC (57ºF) to 32ºC (90ºF).
If you'd rather travel in cooler conditions, search for a cheap flight from San Diego to Denver in January when temperatures average between -9ºC (16ºF) and 7ºC (45ºF).

More about Denver

Once you've booked your flight from San Diego to Denver, decide where you'll be dropping your bags. Make one of these options your base for exploring Denver:
Denver Art Museum and Union Station are a couple of popular attractions to add to your Denver to-do list. Keep the sightseeing going at Denver Botanic Gardens.

Explore more of United States

You've seen Denver, now it's time to discover other parts of United States. Journey around 105 kilometres south to Colorado Springs to tick off its must-visit sights. From US Northern Command (USNORTHCOM) / North American Aerospace Defence Command (NORAD) Headquarters to Cheyenne Mountain Air Force Station and National Strength and Conditioning Association (NSCA), your itinerary will be busy.
If you're looking to explore another corner of United States, head for Aurora, roughly 13 kilometres east of Denver. Magellan's Travel Solutions and Gear, The Fairways at Lowry and Retired Enlisted Association Inc are key highlights.