SAN - DEN

£74 Find Cheap Flights from San Diego to Denver

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Diego to Denver departing on 1/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to Denver

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Diego to Denver, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Diego to Denver, as well as popular online travel agencies
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Cheap Flight Deals from San Diego to Denver (SAN-DEN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from San Diego to Denver that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent return flight deals from San Diego to Denver

KAYAK's recommended return flight deals from the most popular airlines that fly from San Diego to Denver.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
Hawaiian Airlines Logo
14:30 - 17:52SAN-DEN
2h 22mdirect
Hawaiian Airlines Logo
12:30 - 13:56DEN-SAN
2h 26mdirect
£148Hawaiian Airlines
Find Deal
Fri, 10 Oct - Sun, 12 Oct
Frontier Logo
06:25 - 09:56SAN-DEN
2h 31mdirect
Frontier Logo
18:28 - 20:00DEN-SAN
2h 32mdirect
£156Frontier
Find Deal
Mon, 5 May - Thu, 8 May
Alaska Airlines Logo
11:00 - 18:09SAN-DEN
6h 09m1 stop
Alaska Airlines Logo
11:40 - 17:14DEN-SAN
6h 34m1 stop
£163Alaska Airlines
Find Deal
Wed, 28 May - Wed, 4 Jun
Delta Logo
10:01 - 18:19SAN-DEN
7h 18m1 stop
Delta Logo
07:05 - 12:04DEN-SAN
5h 59m1 stop
£163Delta
Find Deal
Wed, 21 May - Wed, 28 May
Southwest Logo
14:45 - 21:00SAN-DEN
5h 15m1 stop
Southwest Logo
20:30 - 21:50DEN-SAN
2h 20mdirect
£171Southwest
Find Deal
Wed, 9 Jul - Wed, 16 Jul
Delta Logo
06:15 - 12:04SAN-DEN
4h 49m1 stop
Delta Logo
19:17 - 23:11DEN-SAN
4h 54m1 stop
£173Delta
Find Deal
Sun, 25 May - Tue, 3 Jun
Alaska Airlines Logo
14:32 - 00:05SAN-DEN
8h 33m2 stops
Alaska Airlines Logo
19:05 - 23:59DEN-SAN
5h 54m1 stop
£176Alaska Airlines
Find Deal
Tue, 3 Jun - Tue, 10 Jun
Southwest Logo
17:30 - 20:50SAN-DEN
2h 20mdirect
Southwest Logo
11:00 - 15:20DEN-SAN
5h 20m1 stop
£186Southwest
Find Deal
Wed, 27 Aug - Sun, 31 Aug
United Airlines Logo
12:52 - 16:20SAN-DEN
2h 28mdirect
United Airlines Logo
07:45 - 09:09DEN-SAN
2h 24mdirect
£189United Airlines
Find Deal
Thu, 4 Sep - Wed, 10 Sep
United Airlines Logo
18:47 - 22:15SAN-DEN
2h 28mdirect
United Airlines Logo
16:34 - 17:58DEN-SAN
2h 24mdirect
£203United Airlines
Find Deal
Tue, 1 Jul - Fri, 4 Jul

Expert advice for your flight from San Diego to Denver

 
Snippets provided in this section are AI-generated based on a summarisation of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are specific to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
United Airlines

United offers Priority Boarding to Zone 2, ensuring overhead bin space for your carry-on.


United's Economy Plus seats offer up to six inches more legroom than standard economy.

Lufthansa

Lufthansa's Economy Flex allows free rebooking, ideal for flexible travel plans.


Lufthansa offers FlyNet Messaging for free to Miles & More members on short-haul flights.

Read more about Lufthansaby Jessica Macdonald
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or out at sea, likely en route to Antarctica or the Arctic.

Read more
Jessica Macdonald

Jessica Macdonald

Expert on Lufthansa

Jessica Macdonald

Jessica Macdonald

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has travelled to more than 50 countries across six continents.

Read more

KAYAK's insights & trends for San Diego to Denver flights

Get data-powered insights and trends into flights from San Diego to Denver to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from San Diego to Denver?

The average price of all round-trip flights from San Diego to Denver clicked on KAYAK for each day over the last 12 months.
When flying from San Diego to Denver, you should consider leaving on a Tuesday and avoid Thursdays if you are looking for the best rates. For your return to San Diego, you’ll find the best rates on Tuesdays and the most expensive ones on Fridays.

What is the cheapest month to fly from San Diego to Denver?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Diego to Denver, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from San Diego to Denver is January, where tickets cost £111 (return) on average. On the other hand, the most expensive months are March and December, where the average cost of round-trip tickets is £190 and £173 respectively.

Can I save money by flying with a stopover from San Diego to Denver?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.
No, with an average price for the route of £320, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from San Diego to Denver?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Diego to Denver, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.
To get a below average price on the flight from San Diego to Denver, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know - Cheap tickets from San Diego to Denver

Low season

January

High season

August

Cheapest flight

£74
Best time to beat the crowds (20% less expensive on average)
Most popular time to fly and prices are also 5% lower on average.
Flight from San Diego to Denver

When to book flights from San Diego to Denver

Are your dates flexible? Find out the best times to travel from San Diego to Denver based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Diego to Denver

  • Can I book a nonstop flight from San Diego to Denver?

    Frontier Airlines offers nonstop flights from San Diego International Airport to Denver International Airport in Denver. Other airlines on this route include United Airlines and Southwest Airlines, which offer a fast way to travel from San Diego to Denver.

  • Does San Diego International Airport offer services for guests with mobility impairments?

    The airport offers different accessibility services located throughout the airport to assist travelers with mobility impairments. Services under this category include visual paging monitors, TDD telephones, and a courtesy cart run by Volunteer Airport Ambassadors, located conveniently throughout the airport. Also, you’ll find the Harbor Police Officers, who assist travelers with special needs.

  • Are there designated smoking areas in San Diego International Airport?

    San Diego International Airport is a smoke-free facility. You’re only permitted to smoke in a designated area away from the terminals. You can use ashtrays located in all smoking areas.

  • What is the best means of transportation from Denver International Airport to my destination?

    The SkyRide bus and A Line rail system offer affordable means of transport from Denver International Airport to downtown Denver and nearby towns. You can also use an Uber from the airport or travel via the shuttle service to nearby cities like Welby, Aurora, Federal Heights, and Commerce City. If your friends or family will pick you up, make sure they can find a good parking spot as curbside parking is prohibited.

  • What guest amenities does Denver International Airport offer?

    Guests can use different amenities and facilities when they arrive at the airport. These include free Wi-Fi, religious facilities open 24h a day, and pet relief areas near gates A, B, and C. If you want to nurse your child, there are three nursing rooms located at each concourse.

  • What is the cheapest flight from San Diego to Denver?

    In the last 3 days, the lowest price for a flight from San Diego to Denver was £99 for a one-way ticket and £197 for a return.

  • Which airlines offer Wi-Fi service onboard planes from San Diego to Denver?

    American Airlines, Delta, Alaska Airlines, Hawaiian Airlines, and JetBlue offer inflight Wi-Fi service on the San Diego to Denver flight route.

  • Which aircraft models fly most regularly from San Diego to Denver?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the San Diego to Denver flight route.

  • Which airline alliances offer flights from San Diego to Denver?

    Star Alliance is the only airline alliance operating flights between San Diego and Denver.

  • On which days can I fly direct from San Diego to Denver?

    There are direct flights from San Diego to Denver on a daily basis.

  • How does KAYAK find such low prices on flights from San Diego to Denver?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Diego to Denver.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Diego to Denver?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from San Diego is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Diego to Denver?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Denver with an airline and back to San Diego with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Diego to Denver?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Denver from San Diego up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from San Diego to Denver

  • Most guests traveling from San Diego will use San Diego International Airport (SAN). While McClellan–Palomar Airport (CLD) is closer, it’s not a major airport.
  • To access San Diego International Airport, you can use a bicycle. The airport offers free bicycle lockers, but requires a $25 deposit, which is refundable. Also, you can catch an Uber to the airport or use car rental services.
  • If you’re using your car to get to San Diego International Airport, there’s a parking service, which costs approximately $13 per day, and includes a shuttle service to San Diego.
  • For arrivals at Denver, you can use Denver International Airport (DEN). From the airport, you can access downtown Denver via train, car rental, Uber, or shuttle service.
  • When you arrive in Denver, you’ll find hotels near Denver International Airport. Most hotels are about 10 miles away and have a shuttle service to help you get there.
  • Denver International Airport also supports sustainability by providing water bottle filling stations in all three concourses. Each concourse has four bottle filling stations.
  • Throughout the airport, you can use free Wi-Fi. You simply need to enable your wireless connection and check for “Den Airport Free Wi-Fi.” Click connect to the network as there is no password needed.
See more tips

Prefer to fly direct from San Diego to Denver?

Find which airlines fly direct from San Diego Airport to Denver Intl Airport, which days they fly and book direct flights.

Direct departures

San Diego to Denver Intl

Monday

Air Canada, Copa Airlines, Frontier, +4 more

Air Canada, Copa Airlines, +5 more

Tuesday

Air Canada, Frontier, Lufthansa, +2 more

Air Canada, Frontier, +3 more

Wednesday

Air Canada, Copa Airlines, Frontier, +4 more

Air Canada, Copa Airlines, +5 more

Thursday

Air Canada, Copa Airlines, Frontier, +3 more

Air Canada, Copa Airlines, +4 more

Friday

Air Canada, Copa Airlines, Frontier, +4 more

Air Canada, Copa Airlines, +5 more

Saturday

Air Canada, Copa Airlines, Frontier, +3 more

Air Canada, Copa Airlines, +4 more

Sunday

Air Canada, Copa Airlines, Frontier, +4 more

Air Canada, Copa Airlines, +5 more

See more direct flights

Direct returns

Denver Intl to San Diego

Monday

Air Canada, Copa Airlines, Frontier, +4 more

Air Canada, Copa Airlines, +5 more

Tuesday

Air Canada, Frontier, Lufthansa, +2 more

Air Canada, Frontier, +3 more

Wednesday

Air Canada, Copa Airlines, Frontier, +4 more

Air Canada, Copa Airlines, +5 more

Thursday

Air Canada, Copa Airlines, Frontier, +3 more

Air Canada, Copa Airlines, +4 more

Friday

Air Canada, Copa Airlines, Frontier, +4 more

Air Canada, Copa Airlines, +5 more

Saturday

Air Canada, Copa Airlines, Frontier, +3 more

Air Canada, Copa Airlines, +4 more

Sunday

Air Canada, Frontier, Lufthansa, +4 more

Air Canada, Frontier, +5 more

See more direct flights
See more direct flights

Top airline flying from San Diego to Denver

 
See real verified KAYAK customer reviews for airlines flying from San Diego to Denver. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Diego to Denver? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
5.9
FrontierOverall score based on 3283 reviews
6.8Crew
6.2Boarding
4.6Entertainment
5.6Comfort
4.8Food
Airline reviews

Seats are uncomfortable but price is good. Guess I can put up with misery for four hours.

8.0 ExcellentGreg, Apr 2025MCO - DEN
Read more Frontier reviews

Seats are uncomfortable but price is good. Guess I can put up with misery for four hours.

The plane failed preflight inspection, so we sat there for 90 mins while they tried to fix it. Ultimately, everything was remedied and we made our connecting flight; instead of a 2 hour layover at the airport, we spent it waiting on the plane.

I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.

The seats were extremely hard and uncomfortable. It was disappointing even for a budget airline.

Delayed each time on a round trip with no significant weather interference. Updates to flight times came after the fact. 30 min behind in boarding and board and phone still show an on time departure. Some mysterious extra 300 miles that came so surprising they had to fuel while we were already on board?

Our flight was canceled for no known reason. We weren’t told until we were checking in at 5:00 am. This was after our last flight with Frontier where we sat on the plane for three hours (not an exaggeration) before we took off because of a mechanical issue. We won’t be flying Frontier again.

Allowed me to chose my seat without extra charge (I purchased full-price ticket) and boarding was in group1. Didn't even serve water.

Stuck in Phoenix for two days, not even a hotel voucher offered.

Every day about it was very different all the boarding pass where all wrong l miss flight no refund all crazy

Flight got delayed for 3.5 hours, and for the first hour after the departure time there was no update from the gate folks...

Everything you need to know for your flight from San Diego to Denver

Information on your arrival and departure airports

Compare transportation modes for San Diego to Denver

Average priceAverage duration
Flights2h 20m
Buses£15728h 05m

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