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Find cheap flights from San Diego to Colorado from $39

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 Colorado departing on 7/30. 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
0 bags
Sat 6/29
Sat 7/6

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Best Colorado Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Denver
Denvernonstop$55
Aspen
Aspen1 stop$296
Grand Junction
Grand Junction1 stop$228
Vail
Vail2 stops$301
Durango
Durango1 stop$377
Montrose
Montrose1 stop$308
Hayden
Hayden1 stop$398
Gunnison
Gunnison1 stop$824

Good to know

Low season

January

High season

June

Cheapest flight

$39
Best time to beat the crowds with an average 21% drop in price.
Most popular time to fly with an average 3% increase in price.
Flight from San Diego to Denver

FAQs - booking Colorado flights

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

    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 Colorado.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Colorado 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 Colorado?

    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 Colorado 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 Colorado?

    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 Colorado 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

Top tips for finding cheap flights to Colorado

  • Looking for a cheap flight? 25% of our users found tickets from San Diego to the following destinations at these prices or less: Denver $109 one-way - $145 round-trip
  • Morning departure is around 2% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from San Diego to Colorado

 
Need help choosing which airline to fly with from San Diego to Colorado? 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.
8.0
DeltaOverall score based on 10457 reviews
7.9Comfort
8.6Crew
7.4Food
8.0Entertainment
8.2Boarding
Airline reviews

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

10.0 ExcellentMichael, May 2024SJC - ATL
Read more about Delta reviews

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

I'm a larger, athletic guy (6'2", 260lbs powerlifter) and I found the seats incredibly uncomfortable with minimal leg room, especially in a window seat. Now, I full understand that being smaller may change my view but even if I was 80lbs less, my legs would be the same size and I was sandwiched between my seat and the seat in front of me.

There was a loud squeaky sound the whole time we were flying.

I didn’t not like that I could not select my seat and ended up with the worse seat.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

The helpful attitude of the staff, and being a wheelchair passenger everyone was helpful and understanding. The trip was made comfortable by the upgraded seat which was given without my request, that was a great surprise. Thank you Delta.

Plane was late because of a mechanical malfunction and the food listed as available was not. Flight attendants seem over worked and under paid. They just done seem happy. And that can be seen in their faces.

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

Overall fine but both ways for this trip was delayed.

Flight was delayed by almost 5 hours. Suitcase was not loaded despite the flight being near empty (my colleagues’ suitcases did reach JFK, unlike mine). Had to argue on phone to get JetBlue to deliver the case to my hotel. Never again

The flight was excellent. The crew was welcoming and attentive.

Great! I love Jet Blue. My favorite airline! Very efficient, clean and timely.

Run out of snack choices. Why are the seats not padded for your butt? Are we sitting on blocks of wood or metal for $250-300 a pop? This ain’t spirit. Let’s get it together people

We were told that our flight would be delayed for 90+ minutes because of weather, so we went to get something to eat only to have them randomly start boarding 15 minutes after the announcement, with no warning.

Entertainment... No earphones passed out. Many including me couldn't use the TV. Legroom was good. Crew was indifferent and a bit surly. Free wifi was a nice convenience. Check in desk location was unknown. Gate number on the boarding passes was wrong.

Going through JFK’s security is a mess. The TSA security said no shoes on the bins. So, we place our shoes in the belt and they came out all over the belt. Boarding was delayed and Flight as well.

Safe and on time were the positives. The plane wasn't cleaned before boarding, there was garbage and food on the floor and in the seat pocket. The TV screen was small and the picture fuzzy, audio quality was poor. Seatbelt was fraying and seat did not recline properly. No charging ports near the seats,

Confusing. Delay updates were out of whack At one point it said my flight was 25 hours. Three gate changes and two delays only to change back to original departure time. Gate announcer and on board flight attendant (Alejandro) making the announcements was impossible to understand due to accent and speed of speech. After beverage service the rear flight attendants sat back there on their phones. No refills no checking in, one sweep through for trash collection. Very impersonal. Bring back Coke products

The Wi-Fi was unavailable on this flight for some reason.

This was a Lufthansa flight, not United. The CSA at the counter, Ashley, was not only incompetent, but quite rude. Me and two other PAX waited over 7 minutes standing in front of her and another CSA and they ignored us. We joked that we must have accidently taken invisibility pills. She could have at least said "I'll be with you in a moment, I'm currently....". I could go on about how rude she and the other CSAs were (whispering, not communicating with me, blaming the situation on others, etc.). She would not work for me. Then, she gave me literally the worst seat on the plane. the worst. My seat kept getting bumped (rammed twice by the crew with their carts and about every 5 minutes by someone using the bathroom), listening to the bathroom all night, crowded seat, etc.

We ended up with seats in the very back. So they did not recline. Have no idea why, we reserved and checked in very early. The isles were very narrow and the seats had very little leg room. But they did give us water, and a snack.

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

Positive: Entertainment via phone on the short was great and my first time. Good food and wine and head phones for free. Negative: Seat hardly reclined on the long flight. Breakfast was an egg with a bun. No egg choices and rather have something sweet like bun/jam and Youghurt.

They did get us booked on a later flight, but it made us miss our connecting flight. So, we had to stay and another state overnight with no luggage or clothes. Because they kept our luggage at airport for next flight on the next day.

Flight was on time. Staff were friendly. I paid for Economy Plus but was required to check my standard carry-on luggage due to lack of space on the aircraft. This cost me 30 minutes, unexpectedly, in waiting at the baggage claim. This experience did not meet my expectations.

Crew is way too many times on the intercom re explaining the same thing

Flight was 1/2 hour delayed leaving Phoenix. Otherwise it was an average flight. Flight crew on this trip was very nice.

Horrible - they lied to me about baggage & boarding, even though I specifically spoke to their agents the day before my flight about my issue. When I showed up they did not let me board and stranded me at my airport until I bought a new flight with money I did not have to spend.

The experience was great and much better than the flight going out. of course I was in first class but the service was excellent

Comfort of seats, ease of boarding. Food selection could be better

Food options were limited which is absolutely embarrassing for a Flight of this size The staff did not come around as much and I am not accustomed to such poor service from American Airlines Drinks I believe were limited to soda and water

Because I can’t stand very long in one place, I was allowed to reword.

Crew were attentive and friendly. Flight was smooth and early! I enjoyed the less crowded plane. Thank you!

We are gluten free, there were not any available complimentary gluten free options.

No meal on a cross country flight? SFO-MiA is pretty much the definition of a coast to coast flight. No meal provided. Sky high wi-fi rates too. Stop nickel and diming your customers.

The staff was unprofessional and didn’t communicate very well. The boarding process was very disheveled, potentially due to a power outage the previous day but there was no contingency plan to properly get passengers boarded the following day. Once boarded the aircraft stayed on the tarmac for over 45 minutes due to high winds. The communication was sporadic but an announcement was finally made an additional 30 minutes later that the flight was cancelled but we couldn’t get off the plane. Prior to deplaning one of the gate agents came on the plane and made an announcement for everyone to pickup their checked bags and take a card to rebook a new reservation because they didn’t have adequate staff. Flights were missed, passengers went to different airports and there was little to no assistance from AA.

Flight was delayed for almost 3 hours. Communication of gate change was poor. Email and screen said one gate and it was a different gate from that. Gate changed first to 64 B and then to 64 C. Originally it was 68B. 64C was not communicated properly!

Plenty of room in the exit row. Sat on the plane an hour before taking off.☹️ Landed late and had to wait for gate availability.

Flight was on time early arrival better entertainment good staff.everything was excellent

They canceled the flight on us very close to the flight date .

My experience was pretty frustrating because the first leg of my flight on United (though booked through Air Canada) was delayed causing me to miss my connecting flight on Air Canada. This could have been an easy solve as there was a direct flight later that morning via Air Canada that they easily could have put me on which would have only gotten me to my destination 2 1/2 hours later but because United and Air Canada don’t seem to have good communication they gave me the run around both telling me to talk with the other which I did three times to no avail. I ended up taking the delayed flight and getting on a new connecting flight which ended up getting me to my destination 6 hours later and I missed the event I was planning to go to this evening.

Everything went smoothly and as expected. We were on time and one flight arrived early.

This is not a Business Class equipped airplane and even the crew apologize before take over BUT BUT Air Canada charged full business class fare

Very good other than we have to wait for one crew and we’re delayed and the pilot and his co- pilot has to make a difference to be right on time arrival. Disappointed about no food service also.

I was appalled to have to pay for just a regular seat when I went to book 24 hrs before my flight! Because it was only an hour flight I didn’t choose a seat from Grand Junction to Denver, but I did for Toronto and had to pay just to choose a regular available seat! In my 60+ years of flying this was the first time I have heard of this. Also, allowing people to bring on “huge “ suitcases, not carry on size, but much bigger, and then a large pack pack stuffed. So they take up all the room in the overhead bins and if we are later boarding, there is no room so we have to check our small carry on. I have already paid for and checked in one bag! I certainly will not choose to fly with United again unless it is the “only” airline available!

Due to a strike taking place with the airline, it negatively impacted my flight in multiple ways. My flight was delayed over 2 hours and the food served was mediocre at best.

Book cheap flights from San Diego to Colorado

Recent round-trip flight deals

6/18Tue
nonstopFrontier
2h 26mSAN-DEN
6/25Tue
nonstopFrontier
2h 33mDEN-SAN
$66
6/26Wed
nonstopFrontier
2h 28mSAN-DEN
7/3Wed
nonstopFrontier
2h 26mDEN-SAN
$67
6/18Tue
1 stopAmerican Airlines
4h 33mSAN-DEN
6/19Wed
1 stopAmerican Airlines
3h 58mDEN-SAN
$191
6/26Wed
nonstopUnited Airlines
2h 26mSAN-DEN
6/30Sun
1 stopUnited Airlines
5h 01mDEN-SAN
$195
8/24Sat
2 stops
14h 34mSAN-DEN
8/27Tue
nonstop
2h 23mDEN-SAN
$197
7/27Sat
1 stopAmerican Airlines
4h 36mSAN-DEN
7/31Wed
1 stopAmerican Airlines
6h 59mDEN-SAN
$198
7/24Wed
1 stopDelta
4h 36mSAN-DEN
7/31Wed
1 stopDelta
4h 36mDEN-SAN
$216
7/12Fri
1 stop
14h 59mSAN-DEN
7/14Sun
nonstop
2h 22mDEN-SAN
$222
6/20Thu
1 stopDelta
4h 39mSAN-DEN
6/24Mon
1 stopDelta
4h 34mDEN-SAN
$226
6/18Tue
1 stopUnited Airlines
6h 01mSAN-DEN
6/20Thu
1 stopUnited Airlines
5h 20mDEN-SAN
$245

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Recent one-way flight deals

7/30Tue
nonstopFrontier
2h 37mSAN-DEN
$39
7/3Wed
nonstopFrontier
2h 26mSAN-DEN
$41
7/23Tue
1 stopDelta
6h 51mSAN-DEN
$98
8/14Wed
1 stopAmerican Airlines
4h 30mSAN-DEN
$99
6/25Tue
1 stopAmerican Airlines
4h 33mSAN-DEN
$108
9/13Fri
1 stopDelta
4h 40mSAN-DEN
$133
8/27Tue
2 stopsAlaska Airlines
12h 13mSAN-DEN
$157
8/28Wed
2 stopsAlaska Airlines
14h 34mSAN-DEN
$163
7/6Sat
1 stopUnited Airlines
6h 31mSAN-COS
$179
7/2Tue
2 stopsUnited Airlines
14h 30mSAN-DEN
$193

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Last minute flights from San Diego to Colorado

Last minute flight, train and bus deals

6/4Tue
nonstopFrontier
2h 28mSAN-DEN
6/6Thu
nonstopFrontier
2h 26mDEN-SAN
$96
6/1Sat
multi-stopFrontier
7h 06mSAN-DEN
6/12Wed
nonstopFrontier
2h 27mDEN-SAN
$126
6/3Mon
multi-stopFrontier
9h 25mSAN-DEN
6/10Mon
nonstopFrontier
2h 28mDEN-SAN
$127
6/1Sat
multi-stopDelta
5h 23mSAN-COS
6/8Sat
multi-stopDelta
7h 23mCOS-SAN
$385
6/1Sat
multi-stopAmerican Airlines
10h 01mSAN-COS
6/8Sat
multi-stopAmerican Airlines
6h 01mCOS-SAN
$390
6/4Tue
multi-stopAmerican Airlines
9h 14mSAN-COS
6/7Fri
multi-stopAmerican Airlines
8h 15mCOS-SAN
$459
6/4Tue
multi-stopUnited Airlines
11h 25mSAN-DEN
6/5Wed
multi-stopUnited Airlines
4h 59mDEN-SAN
$490
6/3Mon
multi-stopUnited Airlines
20h 52mSAN-DEN
6/10Mon
multi-stopUnited Airlines
5h 10mDEN-SAN
$510
6/3Mon
multi-stopAlaska Airlines
18h 57mSAN-DEN
6/5Wed
multi-stopAlaska Airlines
13h 20mDEN-SAN
$601
6/3Mon
multi-stopAlaska Airlines
17h 27mSAN-DEN
6/10Mon
multi-stopAlaska Airlines
18h 22mDEN-SAN
$613

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