DEN - SAN

Find cheap flights from Denver to San Diego from $29

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight departing on 11/23. 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
Economy
0 bags
Sat 10/28
Sat 11/4
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These are the airlines KAYAK users have selected most often in flight searches from Denver to San Diego.
These are the airlines KAYAK users have selected most often in flight searches from Denver to San Diego.

How much is the cheapest flight from Denver to San Diego?

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to San Diego 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.
6:32 pm - 5:59 pmDEN-SAN
2h 27mnonstop
4:30 pm - 6:55 pmSAN-DEN
2h 25mnonstop
$38Frontier
Find Deal
Sat, Oct 28 - Tue, Oct 31
9:47 am - 9:15 amDEN-SAN
2h 28mnonstop
1:25 am - 4:02 amSAN-DEN
2h 37mnonstop
$40Frontier
Find Deal
Tue, Oct 31 - Tue, Nov 7
5:12 am - 4:39 amDEN-SAN
2h 27mnonstop
1:25 am - 3:59 amSAN-DEN
2h 34mnonstop
$48Frontier
Find Deal
Thu, Nov 23 - Tue, Dec 5
6:07 pm - 5:34 pmDEN-SAN
2h 27mnonstop
2:55 pm - 5:29 pmSAN-DEN
2h 34mnonstop
$50Frontier
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Tue, Oct 31 - Wed, Nov 1
12:51 pm - 12:23 pmDEN-SAN
2h 32mnonstop
1:25 am - 4:02 amSAN-DEN
2h 37mnonstop
$52Frontier
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Mon, Nov 6 - Tue, Nov 7
6:32 pm - 5:59 pmDEN-SAN
2h 27mnonstop
1:38 am - 8:13 amSAN-DEN
6h 35m1 stop
$55Multiple Airlines
Find Deal
Sat, Nov 4 - Tue, Nov 7
2:09 pm - 2:53 pmDEN-SAN
3h 44m1 stop
12:27 pm - 2:52 pmSAN-DEN
2h 25mnonstop
$56Multiple Airlines
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Sat, Dec 9 - Wed, Dec 13
11:03 am - 12:16 pmDEN-SAN
4h 13m1 stop
10:34 am - 4:36 pmSAN-DEN
6h 02m1 stop
$68Spirit Airlines
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Tue, Oct 24 - Sat, Oct 28
11:03 am - 12:16 pmDEN-SAN
4h 13m1 stop
10:34 am - 4:36 pmSAN-DEN
6h 02m1 stop
$81Spirit Airlines
Find Deal
Wed, Oct 25 - Sat, Oct 28
2:46 am - 2:14 amDEN-SAN
2h 28mnonstop
1:45 pm - 4:12 pmSAN-DEN
2h 27mnonstop
$186United Airlines
Find Deal
Fri, Nov 17 - Wed, Nov 22

Good to know

Low season

January

High season

March

Cheapest flight

$29
Best time to beat the crowds with an average 44% drop in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from Denver to San Diego

When to book flights from Denver to San Diego

Are your dates flexible? Find out the best times to travel from Denver to San Diego based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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.
Average price per month
To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Denver to San Diego, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
Flight prices as travel date approaches
To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Denver to San Diego, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.

Top tips for finding a cheap flight from DEN to San Diego

  • Looking for a cheap flight? 25% of our users found flights on this route for $76 or less one-way and $98 or less round-trip.
  • The cheapest flight from Denver to San Diego was found 34 days before departure, on average.
  • Book at least 2 weeks before departure in order to get a below-average price.
  • High season is considered to be May, June and July. The cheapest month to fly is January.
  • Morning departure is around 5% cheaper than an evening flight, on average*.
  • Denver International Airport (DEN) is located about 25 miles northeast of Denver’s city center. It is the only international airport in the greater Denver area, and it’s a hub for Frontier Airlines, Southwest Airlines, and United Airlines.
  • Denver Airport (DEN) has one main terminal, the Jeppesen Terminal, plus three concourses, called Gates A, B, and C. Passengers can walk between the terminal and Gate A, but you must take the airport’s automated people-mover train to access Gates B and C.
  • Located less than 5 miles northwest of Downtown San Diego, San Diego International Airport (SAN) is a focus city for both Alaska Airlines and Southwest Airlines.
  • If you’re in the Front Range Urban Corridor or metropolitan Denver, you can use the Denver International Airport (DEN) to fly to San Diego, California.
  • At Denver International Airport, you can visit several restaurants, including Chick-fil-A at the B Gates Center Core, Ben & Jerry’s Ice Cream at A Gates Center Core, and Dazbog Coffee at C Gates near C47.
  • You can use free Wi-Fi at Denver International Airport. To connect, enable your wireless and locate “DEN Airport Free WiFi.”
  • There’s an Interfaith Chapel and Prayer Hall at the Denver International Airport in the Jeppesen Terminal, Level 6. It’s open 24h a day. You can join a Catholic Mass on Sundays at 1pm.
  • Fights from the Denver International Airport to San Diego land at the San Diego International Airport (SAN), which offers access to downtown San Diego and nearby areas.
  • For quick snacks, the San Diego International Airport offers vending machines located at Terminal 1 in the parking lot under the pedestrian bridge. Others are in Terminal 2 at the Parking Plaza in the lower level near the elevator cores.
  • For shoeshine services at San Diego International Airport, you can access the service at Terminal 2 East near Gate 23 or Terminal 2 West at the North Concourse. The shoeshine service is also available at Terminal 1 above the rotunda escalator.
  • Passengers can use luggage carts provided by Smarte Carte, which cost about $5 per cart. If you’re arriving in the International Arrivals area, the carts are free.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for booking flights from Denver to San Diego

  • Where can I park at Denver International Airport (DEN)?

    Denver Airport (DEN) offers several options for parking. The Garage East Parking and Garage West Parking garages are located on either side of the main terminal. Next to these garages you’ll find the Economy East and Economy West parking lots, which are connected to the main terminal by pedestrian walkways and the airport’s free shuttle service. Two satellite shuttle lots (Mt. Elbert and Pikes Peak) offer a very low parking rate and free shuttle service to the airport. You should allow at least 30 minutes to reach the terminal from these lots.

  • Can I take the commuter train to Denver International Airport (DEN)?

    Yes, Denver’s A Line commuter rail service runs between Denver Union Station in Downtown Denver to the airport. The trip takes just under 40min, and you’ll arrive at the airport’s train station in the DEN Transit Center, which is a short walk from the terminal.

  • Can I stay at an on-site hotel before my early-morning departure from Denver Airport (DEN)?

    Yes, the Westin Denver International Airport is DEN’s only on-site hotel. It is located above the Transit Center, making for an easy walk to the Jeppesen Terminal. Hotel amenities include valet parking and a cocktail bar that serves snacks and light meals.

  • What lounges are available at Denver International Airport (DEN)?

    There are six airline lounges at Denver International Airport. The American Airlines Admirals Club, British Airways Executive Club, and Delta Sky Club are all located in the Gate A concourse, and United has three lounges (Club East, Club West, and Club Fly) in the Gate B concourse. In addition to the airline lounges, select American Express cardholders can relax in the Centurion Lounge in the Gate C concourse while US service members and their families can enjoy some time before their flight at the USO Denver, located just over the bridge to Gate A from the main terminal.

  • Where is the car rental center at San Diego Airport (SAN)?

    At San Diego International Airport (SAN), all of the car rental counters are located off-site in the Consolidated Rental Car Center. This center is connected to the airport by the free shuttle bus service. The rental car lot is next to the Rental Car Center.

  • Can I take a bus into the city from San Diego International Airport (SAN)?

    Yes, the #992 buses of San Diego’s Metropolitan Transit System pick up passengers at both of SAN’s terminals and make regular trips to Broadway and State Street in Downtown San Diego. The trip downtown takes less than 20min.

  • Does San Diego International Airport have lactation rooms?

    You can use three lactation rooms located post-security at Terminal 1 West Rotunda, second level, near the elevator. There’s also a room at Terminal 1 East Rotunda on the ground level after the security checkpoint. In Terminal 2, the lactation room is on the second level close to Gate 34-35. The rooms are fitted with a hand washing station, comfortable seating, artwork, electrical outlets, soft lighting, and a children’s seat.

  • Are there nonstop flights from Denver to San Diego?

    Different airlines, including United Airlines and Frontier, fly nonstop from Denver International Airport to San Diego International Airport. Frontier also flies through the McCarran International Airport (LAS), but the flight could take longer. Book through KAYAK for details on different flights if you want to find the shortest route.

  • Can I travel with my pet through Denver International Airport?

    Yes, the Denver International Airport allows pets. To help you manage your pet, the airport offers a pet relief area in each concourse. There’s also one at the Jeppesen Terminal. The relief rooms are located post-security in the cores of A, B, and C Gates. All pet relief rooms have artificial turf flooring and a drainage system. There are disposal containers and bags.

  • Does San Diego International Airport offer services for disabled passengers?

    Travelers who need special assistance can contact their airlines prior to the trip to request assistance. At the San Diego International Airport, all terminals are wheelchair accessible. You can find an accessible shuttle, and if you need help, there are telephones at the airport’s reservation boards.

  • Is there complimentary Wi-Fi at San Diego International Airport?

    Wi-Fi at the San Diego International Airport is available in 2h sessions. If you want to connect quickly, enable your device's wireless connection and search for #SANfreewifi, then connect. To use the service longer, you just need to log back in when the session expires.

  • How long does a flight from Denver to San Diego take?

    The duration of a nonstop flight to San Diego from Denver is typically 2h 27m. The journey crosses a distance of 852 miles.

  • How many flights are there between Denver and San Diego?

    61 direct flights run between Denver and San Diego on a daily basis. On average, there are about 430 departures each week.

  • Which airlines provide the cheapest flights from Denver to San Diego?

    In the past 3 days, the cheapest one-way tickets to San Diego from Denver were found on Frontier ($29) and Spirit Airlines ($34), and the lowest round-trip tickets were found on Frontier ($38) and Spirit Airlines ($68).

  • Do I need a passport to fly between Denver and San Diego?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airlines fly most frequently between Denver and San Diego?

    The airlines most regularly connecting Denver to San Diego are United Airlines (20 flights per day), Air Canada (16 flights per day), and Southwest (13 flights per day). However, there are also other airlines serving flights from DEN to San Diego.

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

    For Denver to San Diego, Saturday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from San Diego back to Denver, the best deals are generally found on Tuesday, with Thursday being the most expensive.

  • Which airports will I be using when flying from Denver to San Diego?

    When flying out of Denver you will be using DEN. You will be landing at San Diego SAN.

  • What’s the earliest departure time from Denver to San Diego?

    The earliest flight leaves Denver at 5:40 am and lands in San Diego at 7:05 am.

  • What’s the latest departure time from Denver to San Diego?

    The last flight leaves Denver at 11:27 pm and lands in San Diego at 12:59 am.

  • Which airlines fly nonstop between Denver and San Diego?

    All the following airlines operate direct flights between Denver and San Diego: Air Canada, Copa Airlines, Frontier, Lufthansa, United Airlines, and Southwest.

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

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

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

    The Airbus A320neo is the aircraft model that flies most regularly on the Denver to San Diego flight route.

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

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

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

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

  • Which is the best airline for flights from Denver to San Diego, Delta or American Airlines?

    The two airlines most popular with KAYAK users for flights from Denver to San Diego are Delta and American Airlines. With an average price for the route of $310 and an overall rating of 7.9, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $364 and an overall rating of 7.2.

  • Which airlines have a flexible cancellation policy for flights from Denver to San Diego due to COVID-19?

    Southwest, Air Canada and United Airlines have all waived their change and cancellation fees on flights from Denver to San Diego. Confirm policies on booking site.

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

    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 Denver to San Diego.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Diego from Denver 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 Denver to San Diego?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Diego with an airline and back to Denver with another airline. Booking your flights between Denver and SAN can sometimes prove cheaper using this method.

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

    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 San Diego from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top 5 airlines serving from Denver to San Diego

 
See real verified KAYAK customer reviews for airlines flying from Denver to San Diego. 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.
Need help choosing which airline to fly with from Denver to San Diego? 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 KAYAK reviews.
7.9
DeltaOverall score based on 29446 reviews
78comfort
78entertainment
81overall
85crew
81boarding
75food
Airline reviews
Pros: "Most of the crew was great with the exception of curbside check-in in Denver."
Cons: "Curbside needs to stop chasing cash tips and do their jobs. If they focused on that tips would be easy to come by. The curbside attendant that took my bag didn’t even bother to check my id. He asked me my name and asked where my destination was. I told him Cincinnati as a layover then LaGuardia where he said that was wrong. He then proceeded to print a boarding pass that wasn’t mine and load my bag into the conveyor. Not 5 mins go by when I realize what happened I wound up having to go to special services to rectify the situation. Which ultimately consisted of me waiting another hour in LaGuardia to get my bag. Please delta have these curbside handlers actually want to do their job and stop chasing cash tips."
Read more about Delta
Pros: "Most of the crew was great with the exception of curbside check-in in Denver."
Cons: "Curbside needs to stop chasing cash tips and do their jobs. If they focused on that tips would be easy to come by. The curbside attendant that took my bag didn’t even bother to check my id. He asked me my name and asked where my destination was. I told him Cincinnati as a layover then LaGuardia where he said that was wrong. He then proceeded to print a boarding pass that wasn’t mine and load my bag into the conveyor. Not 5 mins go by when I realize what happened I wound up having to go to special services to rectify the situation. Which ultimately consisted of me waiting another hour in LaGuardia to get my bag. Please delta have these curbside handlers actually want to do their job and stop chasing cash tips."
Pros: "We arrived eventually."
Cons: "Flight delayed three hours. Payed extra for an earlier flight. Very disappointing."
Cons: "The only problem with the food was it was all canceled because of rough weather."
Cons: "I’m would be much better if I can sit by my husband."
Pros: "Nothing"
Cons: "I bought a ticket thinking i bought it through kayak but I actually bought a ticket through a third party in India. Where no one spoke good English. I called the agency to find out if I needed a Visa for my visit to Australia and the told me no. So when I showed up to the airport I didn’t have the right documents and I MISSED MY FLIGHT. Also the wouldn’t just change my flight and charge me the change flight fee. They cancelled my flight entirely and made me buy a whole new ticket!!! Worst flight experience I’ve ever had and this is not my first time flying to Australia or out of country."
Pros: "Friendly cabin crew. Early am departure. On board entertainment is a great selection of movies/TV etc. Clean aircraft. Comfortable seating. Great flight."
Cons: "Had to wait for the crew from another flight before boarding p"
Pros: "Check in Denver super helpful Gate staff hustled to turn around flight Flight crew excellent"
Cons: "Flight delayed, almost missed international connections"
Pros: "The fact that there was a screen for movie selections and a charging port for my phone and the flight attendants were super nice"
Pros: "Had to cross terminals and the pathway was closed due to an international flight landing (poor planning on LAX part) so had to exit and reenter terminal through TSA. Flight delayed an hour then cancelled due to control panel failure. 10pm flight became 12am bus (and originally told it was 11.15pm bus which was "stuck in traffic" when google map traffic was all green). Got back to SD 4 hours after scheduled time."
Cons: "I never made it... I had a trip interruption and got stuck in Chicago and would of had to wait another full 24hrs to take the flight to Denver. tired and nauseated after being all day at the airport that at midnight, i knew that I couldn't hold off till the next evening, took the next flight back."
Pros: "Older style cabin, but still a comfortable flight. Crew was friendly."
Pros: "Seats were comfortable enough"
Cons: "They force you to get to the airport really early."
Cons: "Late departure. Seats were double booked. Had to delay again to sort it out."
Cons: "The new seats were so uncomfortable, I couldn't sit shoulder to shoulder with the people next to me"
Pros: "Arrived home safely"
Cons: "Arrived very early due to logistics and our flight was not leaving for 9 hrs and the AA Representative would only put us on a earlier flight if we paid a large fee, so we waited then the original flight was delayed 2 hours and we nearly missed our connection in another city, it all could have been avoided if a little flexability and care were involved to put us on a earlier flight"
Pros: "Nice flight. Nice aircraft. Very nice flight attendants. Thank you."
Cons: "No issues at all."
Cons: "More leg room that iI don't have top pay extra for"
Pros: "The people were nice and helpful. And the aircraft did not feel cramped. I again did not use the entertainment or anything like that."
Cons: "The flight was three hours late!!!!!!! I had to get on and get off the plane with all my stuff. This has financial implications on the ground later that evening in Uber Cost and I had to pay for the additional day for my car because I was not able to pick it up at the originally scheduled time. I contacted United and have not heard ANYTHING!!!!! Please help me get my money back!!!"
Pros: "Couldn’t get clearance to leave because bathrooms didn’t pass?? Why would it take another hour when the plane had already been there an hour and a half"
Pros: "The app promoted me to check in on my phone and would not allow me to check in. So I assumed the time on the ticket would be my boarding time. I was late for my flight."
Cons: "My 10:00 p.m. flight was canceled so I had to spend the night trying to sleep in the airport. Have you ever had to do that? Not fun."
Pros: "I liked the customer service wfrom the woman who helped us find a way with patience to get a working card to get our luggage checked in. I liked the customer service on the flight they were attentive and friendly."
Cons: "The options to pay baggage with one card is rough on the average traveler, the baggage charges cost as much tickets!"
Pros: "I purchased a ticket for my 18 year old dog $ 125.00 each way to fly with me to Kalispell and back. She is so old that she can not SEE, HEAR, or BARK any longer. I understood she needed to be under the seat for take off and landing but I was told by the ticket agent and flight attendants on my first flight that she could sit on my lap during the flight. Everything was great on the way there. On the returning flight,.... the flight attendant was so RUDE to me. She saw that after we were airborne and at a steady altitude, I brought my dog "Kacey" up into my lap. She immediately raised her voice and stated the dog needed to remain on the ground. I politely explained her condition BUT she refused to listen to anything. I put my poor old dog back under the seat. After approx 20 min I could hear her patting very loud. I lifted her again and asked a different flight attendant for some water. She was very hot on the floor. Or course, the flight attendant saw my little chihuahua drinking the water and said that after she drinks a little more, she must remain under the seat. By now, my husband is getting annoyed. He tried explaining to the flight attendant the medical needs that my dog has " she's on protein shakes" which were approved their security. and how fragile she is. She can't BARK, SEE, or HEAR. Yes, we will be putting her down soon but we took her to Montana for my daughter to say her GOODBYES!! Sorry to say, but that flight attendant has turned me away from UNITED AIR LINES forever. Feel free to call me 352-804-8344. You may send this to UNITED AIRLINES too!! Thanks Karen Hope"
Pros: "We were forced to re-book this leg of our trip because of "insufficient" layover time. The United Airlines staff helping the numerous customers that were forced to re-book were not friendly, did not function with any sense of urgency and were as minimally helpful as possible with the inconvenience. After exiting customs we had 30 minutes to get to our gate, instead of offering to take us to the front of the line to get through security faster we were simply told we would not get through it in enough time to make our flight. Initially we were not even told we were going to be re-booking our flight, we were only told that we needed to re-check our bags at the counter after exiting customs. The entire interaction was very frustrating."
Cons: "I saw my bag come out of the baggage claim ripped open. My stuff coming out. My zipper was complety destroyed and my locking mechanism on my bag was ripped off even though it wasn't locked."
Pros: "The crew called out beautiful sights as we passed over them. The flight attendants were sweet"
Cons: "Would have been nice to have some entertainment"
Pros: "Flight was on time and the aircraft was clean."
Cons: "I quickly realized that it was a mistake to only pay $8 additional for my cramped seating. I felt like I was on public transportation with absolutely no legroom. They have designed the new plastic seats to be as thin as possible with a tiny 6" flap -not even a tray that can hold a drink. Ridiculous!"
Pros: "Price was right and my golf clubs arrived without incident."
Cons: "Flight was delayed over 1 hour with little explanation."
Pros: "Flight duration"
Cons: "The delayed plane that they wouldn't tell me why it was delayed"
Pros: "On time"
Cons: "The plane sounded like it needed maintenance. Very loud sounds!"
Pros: "Great price!"
Cons: "The seating is even tighter than normal coach, but my flight was only 2 hours so it was no big deal. I don't think I would take a longer flight with seating that tight."
Cons: "Ridiculous unbundled pricing. They charge for aisle seats. We paid $19 each for seats that were NOT the ones with extra leg room. They charge $40 for carry-on items. The attendant never asked us if we wanted anything to drink. When we requested something, she had to have a more senior attendant come tell us that only water is free. Soda is $2. A couple traveling with us bought the trail mix, which was incredibly stale. He asked for water, which he never received. Fly Frontier only if there are absolutely no alternatives."
Pros: "Nothing. Literally nothing at all."
Cons: "This situation is a clear statement about the unfortunate state of affairs regarding "customer service". If anyone uses the bromide "the customer is all important", cite this example as proof positive of the lie that is that tired statement. This circumstance, was, essentially no one's fault and yet the employee reaction on behalf of Frontier airlines speaks volumes to the general attitude that the ORGANIZATION takes toward its paying customers. Due to delays on the first leg of the trip from DC to Denver, the connecting flight was missed. This is understandable on its own, as I have no expectation that a second flight would be held for me. However, the fact that Frontier, as an organization, feels ABSOLUTELY NO OBLIGATION WHATSOEVER to assisting their customers in arriving to their ultimate destination in a timely manner means they will never, EVER, get my money again. To make matters worse, the two options they DID offer, were unacceptable: 1) Offered a flight to an airport an hour away from my destination & 2) Offered a flight to my actual destination...two days later (in the airport on Tuesday; they offered to get me on a flight to my destination Thursday) AND this offer with absolutely no assistance regarding sleeping arrangements for TWO NIGHTS. In short, trip was complicated for which I do not blame Frontier. However, their complete lack of customer service to a paying customer ultimately has cost them future customers. My family travels frequently and I will certainly advise any and all persons I know NOT TO EVER TRAVEL ON FRONTIER AIRLINES! I will, however, recommend the FAR MORE CUSTOMER FRIENDLY DELTA airlines)"
Pros: "Flight time"
Cons: "My flight was delayed twice, so I arrived an hour before my departure. I could not check in online because of the flight delay. When I went online to check in, I kept receiving "error" messages. Once I arrived at the airport there was a long line of people waiting to check in. NO ONE was using the check in kiosks for the same reason they could not check in online. As a customer, I expect to have the availablility of resources when checking in online. This is how I always check in. Your technical issues is irresponsible on Frontier's end. When I was finally greeted by the agent, she said that there was 41 minutes until departure and that I could not check in my bags. I asked if I could put my bag onto another flight. She said that after 9/11, they do not allow passengers to board flights without their bags. I asked to speak to her manager. She tried calling the manager who was not picking up her phone. After she got ahold of the manager, it took her ten minutes to come down. I asked Frontier's manager, Brehona why it took her ten minutes. She was immediately offended and rude. she did not even try to assist me. She told me I needed to rebook and could not waive a $99 booking fee. This was a lie. I called Frontier's customer service to at least have the $99 fee waived because it was not my fault I did not make the flight. I was on time. In comparison, I have been in a similiar situation (with a different and much better airline) where the manager was where she was supposed to be, which was behind the counter actually doing her job managing. The other airlines manager was able to go outside and contact other people to get my bags onto the flight. With Frontier's manager, she made zero effort to assist me. On top of that, she notated on my account that she was not removing the $99 fee. This fee IS waivable, especially under the circumstances that I was in: my flight was delayed twice, I missed the cut off time by two minutes and that time increased due to the manager's behavior and untimelines responses to her employees. because the Frontier's manager Brehona made that notation, I could not have the fee waived because they do not override decisions of other managers. I had to book a new flight and pay the $99 fee. I confronted Brehona and told her that the fee is refundable and customer service was going to refund me if it were not for Brehona's notation. She lied that she did not make that notation. I told her that I knew she did. She admitted to it then went crazy and said I cannot get on my second flight that I just booked!!! She called security to try to kick me out. Of course I wasn't kicked out of the airport because I didn't violate any laws. Brehona provided me with bad service, created a hostile environment for me and was going on a power trip harassing me and refusing me flights. I called Frontier's customer service and they told me that my flight was non-refundable. Worst experience of my life. I will never fly with Frontier again!"
Pros: "It's cheap which is nice but beware of hidden fees"
Cons: "It's more expensive to CARRY on your luggage rather then check it!!!!! I feel like it's a sneaky way to charge you as people mostly try to carry on. They do that to AVOID extra charges. May sound petty but it really irked me. On another note, when ordering a cocktail you pay on a IPAD which asks you the percentage of gratuity you would like to leave. Grossly inappropriate as flight crew cannot except tips under FAA law."
Pros: "Everything!!! Super impressed!"
Cons: "That I had to leave the amazing experience and go on vacation. :("
Pros: "The gate attendant was super helpful and changed my seat to one closer to the front because I needed off the plain quickly for business. Te flight crew were personal and engaging, and made the trip lighter and fun (even). Well done crew!"
Cons: "The great price and then a la carte everything else is frustrating, but if you fly Spirit, you know what you're getting. The baggage fee for a carry on was too high in my opinion."
Cons: "The checked baggage...$84. REALLY? That will make me rethink my future travel plans...with other airlines."
Cons: "Worst policies of any company I've ever flown with and I will never fly with them again."
Pros: "Nothing"
Cons: "Canceled my flight last minute, didn't notify me at all."
Cons: "I paid more money during check in to an upgrade seat. Once on the plane, other passengers sat WHERE EVER they wanted. The staff had problems with accountability because seat numbers and ticket assignments were completely ignored. What good is a seat assignment if staff ignores the flight manifest. In the future I will no longer fly spirit because you do not value my upgrade. I feel you have unfairly taken my upgrade money only to find out that passenger's can ignore the upgrade costs and sit anywhere in the plane."
Cons: "1.Seated next to a very large man that should have bought 2 seats. I was only able to occupy 3/4 of my space. It was a very uncomfortable flight with having part of a strangers body touching and crowding me. There were no other seats available to move to. 2. When I asked for a glass of water, they do not give you, but you have to pay. 3. ALL other airlines allow a purse and a small carry-on. They charge $55.00 dollars. 4. They charge double for check in bag. $50.00, most others charge $25.00 I will not fly with Spirit again and heard other complaints from other passengers. This will be a short-lived airline."
Cons: "I missed my flight and my tickets were unrefundable and my bag went to San Diego. I still have not received my bag"
Pros: "I will never fly with them again."
Cons: "Customer service was aweful. Women at the front would not allow my ticket to be printed however I was already checked into my flight. They are crooks trying to squeeze money out of their travelers. If this isn't taken care I will no longer purchase from kayak either. I have been a long standing customer of yours. It's the only app I use to purchase tickets. I am now missing work and was forced to pay 100$ to get a later flight. Very disappointed."
Pros: "The cost of the trip was very low - with all the frills removed, air travel can be relatively cheap. Plan ahead - you will not be able to use TSA Pre-Check, you will have to pay extra to carry on a bag (so buy your bag online at the airline's website before you go to the airport - this is the cheapest way to do it as they charge you more to purchase the carry-on at the check-in counter and even more if you wait until the boarding gate), and you will have to pay for all beverages including water and provide your own in-flight entertainment. If you plan ahead and know what you're getting into, flying Spirit can be a pleasant experience. The flight staff is friendly and polite."
Cons: "The seats are very close together - don't expect to have any leg room - and they do not recline. Bring a neck pillow if you have any intention of sleeping."

Book cheap flights from Denver to San Diego

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Denver to San Diego found on KAYAK in the last 72 hours.
11/23Thu
nonstopFrontier
2h 27mDEN-SAN
$29
10/25Wed
nonstopFrontier
2h 32mDEN-SAN
$31
10/29Sun
nonstopFrontier
2h 33mDEN-SAN
$33
10/17Tue
1 stopSpirit Airlines
4h 13mDEN-SAN
$34
10/30Mon
nonstopFrontier
2h 30mDEN-SAN
$35
10/23Mon
1 stopSpirit Airlines
13h 56mDEN-SAN
$40
10/12Thu
nonstopUnited Airlines
2h 24mDEN-SAN
$109
11/25Sat
1 stopDelta
4h 35mDEN-SAN
$114
12/4Mon
2 stopsUnited Airlines
11h 24mDEN-SAN
$204
10/29Sun
2 stopsAmerican Airlines
13h 05mDEN-SAN
$417

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Last minute flights from Denver to San Diego

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Denver to San Diego that are departing in the next 10 days.
10/3Tue
multi-stopFrontier
9h 13mDEN-SAN
11/3Fri
nonstopFrontier
2h 31mSAN-DEN
$72
10/3Tue
multi-stopMultiple Airlines
5h 31mDEN-SAN
10/10Tue
multi-stopMultiple Airlines
6h 35mSAN-DEN
$77
10/3Tue
multi-stopFrontier
5h 31mDEN-SAN
10/4Wed
multi-stopFrontier
9h 46mSAN-DEN
$78
10/2Mon
multi-stopFrontier
8h 49mDEN-SAN
10/10Tue
multi-stopFrontier
13h 28mSAN-DEN
$88
10/3Tue
multi-stopFrontier
5h 31mDEN-SAN
10/10Tue
nonstopFrontier
2h 36mSAN-DEN
$98
10/2Mon
multi-stopSpirit Airlines
13h 29mDEN-SAN
10/10Tue
multi-stopSpirit Airlines
6h 35mSAN-DEN
$160
10/2Mon
multi-stopSpirit Airlines
13h 29mDEN-SAN
10/5Thu
multi-stopSpirit Airlines
13h 58mSAN-DEN
$203
10/2Mon
multi-stopUnited Airlines
7h 12mDEN-SAN
10/5Thu
multi-stopUnited Airlines
4h 44mSAN-DEN
$717
9/29Fri
nonstopUnited Airlines
2h 24mDEN-SAN
10/4Wed
nonstopUnited Airlines
2h 25mSAN-DEN
$726
10/1Sun
multi-stopAlaska Airlines
10h 43mDEN-SAN
10/4Wed
multi-stopAlaska Airlines
27h 39mSAN-DEN
$871

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Denver - San Diego Flights

Departure:

Denver (DEN)United States

Destination:

San Diego (SAN)United States

Return flight deals:

San Diego - Denver

Cabin classes:

$488
$606
$368
$41

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Browse destinations:

Compare transportation modes for Denver to San Diego

Average priceAverage duration
Flights$2912h 27m
Buses$34035h 27m