$48 Find Cheap Flights from San Diego to Colorado

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 5/21. 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
1 adult, Economy, 0 bags

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Diego to Colorado.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Diego to Colorado.
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Flight Deals

Cheap Flights from San Diego to Colorado

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Denver
Denvernonstop$84
Aspen
Aspen1 stop$329
Vail
Vail1 stop$359
Grand Junction
Grand Junction1 stop$268
Durango
Durango1 stop$260
Montrose
Montrose1 stop$351
Hayden
Hayden1 stop$381
Gunnison
Gunnison1 stop$318
Denver
Denvernonstop$84
Aspen
Aspen1 stop$329
Vail
Vail1 stop$359
Grand Junction
Grand Junction1 stop$268
Durango
Durango1 stop$260
Montrose
Montrose1 stop$351
Hayden
Hayden1 stop$381
Gunnison
Gunnison1 stop$318

Book Cheap San Diego to Colorado Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Diego to Colorado 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Diego to Colorado

Tue, Sep 1 - Mon, Sep 7
Frontier Logo
6:25 am - 10:06 am
SAN
-
DEN
2h 41mnonstop
Frontier Logo
7:13 am - 8:42 am
DEN
-
SAN
2h 29mnonstop
$84Frontier
Fri, Jun 5 - Tue, Jun 9
Frontier Logo
6:25 am - 10:01 am
SAN
-
DEN
2h 36mnonstop
Frontier Logo
10:29 pm - 11:53 pm
DEN
-
SAN
2h 24mnonstop
$85Frontier
Wed, Aug 19 - Wed, Aug 19
Southwest Logo
8:35 am - 4:35 pm
SAN
-
COS
7h 00m
1 stop
Southwest Logo
5:40 pm - 8:55 pm
COS
-
SAN
4h 15m
1 stop
$177Southwest
Thu, May 28 - Mon, Jun 1
Southwest Logo
6:50 pm - 11:50 pm
SAN
-
COS
4h 00m
1 stop
Southwest Logo
2:15 pm - 3:35 pm
COS
-
SAN
2h 20mnonstop
$218Southwest
Wed, May 27 - Wed, Jun 3
United Airlines Logo
6:55 pm - 11:59 pm
SAN
-
COS
4h 04m
1 stop
United Airlines Logo
3:42 pm - 8:46 pm
COS
-
SAN
6h 04m
1 stop
$237United Airlines
Wed, Aug 19 - Sun, Aug 23
United Airlines Logo
6:30 am - 1:16 pm
SAN
-
COS
5h 46m
1 stop
United Airlines Logo
5:30 am - 9:05 am
COS
-
SAN
4h 35m
1 stop
$257United Airlines
Thu, Jun 4 - Sat, Jun 6
Delta Logo
5:01 pm - 10:22 pm
SAN
-
COS
4h 21m
1 stop
Delta Logo
11:55 am - 11:15 pm
COS
-
SAN
12h 20m
2 stops
$259Delta
Wed, Aug 12 - Sat, Aug 15
American Airlines Logo
12:04 pm - 7:58 pm
SAN
-
DRO
6h 54m
1 stop
American Airlines Logo
6:52 am - 2:14 pm
DRO
-
SAN
8h 22m
1 stop
$267American Airlines
Fri, Jun 5 - Sat, Jun 13
American Airlines Logo
7:15 pm - 12:04 am
SAN
-
DRO
3h 49m
1 stop
American Airlines Logo
5:06 pm - 10:39 pm
DRO
-
SAN
6h 33m
1 stop
$279American Airlines
Wed, Jul 15 - Sun, Jul 19
Delta Logo
5:01 pm - 9:55 pm
SAN
-
GJT
3h 54m
1 stop
Delta Logo
6:56 pm - 11:50 pm
GJT
-
SAN
5h 54m
1 stop
$301Delta
Booking Insights

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

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

How much is a round-trip flight from San Diego to Colorado?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Diego to Colorado departing in September.

What is the cheapest San Diego to Colorado flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Colorado from San Diego found in the last 72 hours was to Denver, at $111 round-trip. The most popular route is from San Diego (SAN) to Denver (DEN), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $111.

What is the cheapest time of day to fly to Colorado?

The average price for all round-trip flights from San Diego to Colorado depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Colorado is generally at night, when round-trip flights cost $213 on average. Morning departures are around 1% cheaper than evening flights, on average. The most expensive time of day to fly to Colorado is generally in the evening, which is peak travel time and where the average cost of a ticket is $288.

Can I save money by flying with a layover from San Diego to Colorado?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $348 on average.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Diego to Colorado, 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 Colorado is May, when tickets cost $229 (return) on average. On the other hand, the most expensive months are April and December, when the average cost of round-trip tickets is $468 and $458 respectively.

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

The average price of all round-trip flights from San Diego to Colorado clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Colorado on a Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from San Diego to Colorado. For your return ticket, we recommend flying on a Thursday and avoiding Sundays for the best deals.

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

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 Colorado, 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 Colorado, you should book around 3 weeks before departure, which saves you about 35% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$48
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly and prices are also 15% lower on average.
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 from San Diego to Colorado 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 from San Diego to Colorado with an airline and back 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 from San Diego to Colorado up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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 $127 one-way - $200 round-trip

Reviews of the top 5 airlines serving from San Diego to Colorado

 
See real verified KAYAK customer reviews for airlines flying from San Diego to Colorado. 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 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
SouthwestOverall score based on 4314 reviews
8.1Boarding
7.5Entertainment
8.0Comfort
8.6Crew
7.0Food
Airline reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

10.0 Excellentlarry, Apr 2026
LGB - PHX
Read more Southwest reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

Comfortable. Easy. No problems. Just wish they had gf options for snacks.

The crew was very kind and made going to Hawaii relaxing and fun to look forward to! Thank you Southwest for a pleasant flight!

We waited in the airplane for over 45 min for a southwest employee to make the flight. This cause over half the plane to miss their connecting flight in Denver. When we confronted the desk upon arrival, they told us the only flight they had was the next day leaving at 8:50 pm!!! Or they offered to get us to Burbank or LA, but after that we were on our own to get back to Santa Barbara. I paid for a flight from sba to bna bna to sba. My re entry into mom mode has been 💯 rough because of southwest mistake with my flight. And now I’m leaving to Reno tomorrow for a vballl tournament and just discovered that my leg in Vegas has me and my 3 kids on a stand by flight even though I had booked these ticket last year November!! Do better southwest!

Terrible. Even though there’s assigned seating now, they are still the slowest boarding airline of anyone.

It was good from LAX to Phoenix, But the connection in Phoenix to Tulsa was not that great. The staff on both flights were great. The choice of free entertainment was ok nothing to brag about. The 45 min delay because of some electrical issue wasn't great from Phoenix to Tulsa. We sat there with hardly any air, The seat I had was between windows so the side of the plane pushed in on you. My being a bigger man it then made the seating area uncomfortable. The seats on the plane had no power to connect to recharge your phone or anything. I would recommend that they should look into a slot or clamp to hold your phone to enjoy while watching the entertainment choices hands-free. Also make it possible to raise the inner seat by the window be able to raise the arm rest up to make more room for larger people to set more comfortably. I would also say other then that stop price gouging the airfare or nickel and diming everything. Not fair for people having to fly for emergencies and be paying for higher prices due to the season or holidays. Your making your money either way and the cost of flying is still going to be the same regardless if there's 100 people or 200 people.

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

More efficient with checking lines and boarding/checking bags when needed.

They were really helpful with every question and my kids had never been on a plane and the staff made them feel comfortable

I was on flight #3022 departed from San Diego, California to Medford, Oregon. I had Denise & Damaris as my flight attendants. I didn’t have much interaction with Damaris, but I did with Denise who had, this calm, cool collective voice when she spoke about the emergency exit plans before takeoff. I travel often and I’ve never met a flight attendant that can put you at ease. I felt she respects and takes pride in her position and more airlines need to adopt the integrity and respect that she has for Alaska Airlines. Debbie

All airlines should board planes back to front, instead of catering to higher priced tickets. The boarding groups are inefficient and delay takeoff time

Luggage was severely damaged. Flight was late for several hours

The ticketing counter in SD was a mess. The lady handling the First-Class check-in seemed overwhelmed until a supervisor replaced her. It took almost 20 minutes to get once couple checked in, and then she started walking around the counters while 7 people just stood in line. Once her supervisor arrived, she announced she was going on break, never to engage with customers again.

No outlets, plugs, way to charge the phone or service and no food on one leg o the trip, but other than that, great. Loved WIFI, the flight, the crew, the pilots, the schedule, etc. Great job. My new favorite airline!

I had a problem with my reservation and no one could help me understand what happened. I booked my flight months ago and received a confirmation email. In the confirmation email, it said that the flight would depart at 3:15 p.m. A few hours before the flight, I tried to go online and check in, and suddenly it said that the flight was leaving an hour earlier. I had to rush to get to the airport and almost didn't make it. No one could help me understand why this happened, and I'm really concerned that it might happen in the future. I would appreciate some support in this matter.

It was a super old plane so the first class experience was just not luxurious

Good as usual. Just wished my seat was assigned at online check in. Thanks anyways

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The flight crew on this leg of my trip was very friendly and pleasant. Every one of them was humorous, as well as helpful and accommodating. This group was BY FAR the best crew I’ve flown with. They deserve kudos.

The entertainment options on the seat back video boards were nice.

The boarding process was straightforward. One pertinent observation regarding all boarding procedures is that if an individual requires assistance or possesses a special status and is part of preboarding, it is advisable to limit the number of passengers who can preboard with them, rather than the entire, sometimes large, companion groups. The seats are uncomfortable, and the entertainment options are significantly inferior compared to other airlines. During the snack service, I requested an additional bag of snacks, but my request was denied. Initially, the flight attendant agreed to my request.becoming a strange accurate moment. The flight duration was four hours.

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

During landing. 2 crew members passed 3 times by my lane and didn't notice that people in front of us had their site to the furthermore reclined... That was uncomfortable and could have been dangerous.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

It’s always a great time flying with united airlines.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

Boarding gate at LAX was too crowded—two gates next to one another

On time departure and early arrival. Flight attendant very nice.

Everything was delayed and the staff sent me to the wrong gate, causing me to miss one of my flights. I arrived at my destination 6 hours later than I was supposed to.

The SFO Lounge crew were amazing. The bartender Faris was great. Thanks!

Was not able to do a online check-in because the American Airlines system doesn't store our visa or other passport information, allowing us to have a trouble-free check-in. We were forced to have to check-in at the counter which Changes are upgrade status given that we were not able to check in much earlier.

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

We left at 1030 am pacific from LA and supposed to land at 7 pm Eastern in NY. They made a detour, stopped in Philadelphia and didn’t land till 1130 PM Eastern!!! Worst flight experience with no pilot communication with no explanation as to what was going on. Everyone was very frustrated to say the least.

Flight boarded from Gate 159B, the farthest gate in the LAX Bradley Terminal. While the flight operated on time, the first class cabin attendant made no recognition of my being an Advantage Executive Platinum member.

The flight itself was excellent but the gate attendant made me check my carryon since she said it was an inch too big. I’ve had no problems with this carryon on recent flights on Qantas, Delta, Austrian, Southwest Airlines even though the overhead bins are the same size. there were other carryons in the bins that also looked larger than mine and there was room left in the bins for more. When I picked up my carryon from baggage claim one of the wheels had broken off.

It was an early flight and most people napped/slept and the crew let us which was nice.

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

Seats were new and comfortable. Staff was fine. Missed my connection due to weather -which wasn’t their fault- but got no help at all. Gate staff sent me to customer service, which was and stayed unstaffed. Sign with QR code directed me to call or chat. Chat was useless. Call was returned after an hour. No itinerary offered by Frontier could get me home in less than 30 hours. Rebooked with another airline and got a partial refund that came to about 10 percent of what I paid to get home.

The experience was good. No frills but I got there safe and sound and on time.

As every law enforcement agency I could imagine surrounded the plane and we didn’t disembark for 2 hours and then had to stick around for another hour to go get our personal belongings after leaving them behind and being bused away from the plane, it was scary and inconvenient. We were given no information as to why this was happening. Lack of communication with passengers was disappointing.

Frontier Airlines was AWFUL. I was an hour early for my flight and the lady refused to check me in. I had to purchase a whole new ticket with a different airline.

Late, terrible communication, horrible planning of passenger seating until the literal last minute. One of the worst flying experiences of my life. Y'all suck

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

Information on your arrival and departure airports