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Estes Park

$40+ Cheap flights from San Diego (SAN) to Estes Park, CO

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheapflights Tip: The best prices from San Diego to Estes Park are usually found in January or October, booked 52 days in advance, depart on a Friday or Thursday and return on a Wednesday

Cheap flight deals from San Diego to Estes Park

Cheapest flights from San Diego to Estes Park
Explore the most affordable flight options available from San Diego to Estes Park. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This Expedia deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/239:14 pmSAN - DEN
1 stop10h 41mFrontier
Sat 1/109:45 pmDEN - SAN
Nonstop2h 31mFrontier
Deal found 12/14$110
This CheapOair deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:57 amSAN - DEN
1 stop5h 42mFrontier
Mon 1/510:29 pmDEN - SAN
Nonstop2h 30mFrontier
Deal found 12/13$112
This Kiwi.com deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:57 amSAN - DEN
1 stop20h 58mFrontier
Sun 1/119:18 amDEN - SAN
Nonstop2h 34mFrontier
Deal found 12/15$123
This Kiwi.com deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/239:14 pmSAN - DEN
1 stop10h 41mFrontier
Mon 1/510:29 pmDEN - SAN
Nonstop2h 30mFrontier
Deal found 12/15$131
This Kiwi.com deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:57 amSAN - DEN
1 stop20h 58mFrontier
Tue 1/61:02 pmDEN - SAN
Nonstop2h 32mFrontier
Deal found 12/14$137
This Kiwi.com deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/211:06 pmSAN - DEN
1 stop13h 52mFrontier
Mon 1/510:29 pmDEN - SAN
Nonstop2h 30mFrontier
Deal found 12/15$154
This Expedia deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/239:14 pmSAN - DEN
1 stop10h 41mFrontier
Mon 12/2910:37 pmDEN - SAN
1 stop14h 34mFrontier
Deal found 12/14$162
This Expedia deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/292:10 pmSAN - DEN
1 stop9h 15mFrontier
Thu 1/16:35 amDEN - SAN
1 stop14h 49mFrontier
Deal found 12/14$163
This CheapOair deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/309:14 pmSAN - DEN
1 stop10h 41mFrontier
Sun 1/46:15 amDEN - SAN
1 stop4h 58mFrontier
Deal found 12/14$164

Find flight deals from San Diego to Estes Park

Keep the following information in mind while searching for San Diego to Estes Park flight deals. Data was last updated December 15, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$58
(Frontier)

One-way from

$40
(Priceline)

Popular in

March

Cheapest in

January

Average price

$166
Provider with most accurate pricing for San Diego-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Diego-Denver Intl flights.
Search Deals
From San Diego to Estes Park
Search Deals
One-way flight from San Diego to Estes Park
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Diego to Estes Park that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 15, 2025.
Use the filters below to find and compare flights from San Diego to Estes Park that are best for you.

Fly from

San Diego

Fly to

Estes Park

Route

Depart

Return

Price

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Fri 1/9

1:00 pm-4:31 pm

Nonstop2h 31m

Denver Intl

Sun 1/11

9:05 pm-10:37 pm

Nonstop2h 32m

$137

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 1/7

9:40 am-3:05 pm

1 stop4h 25m

Denver Intl

Sun 1/11

8:45 pm-10:20 pm

Nonstop2h 35m

$157

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Sat 2/14

11:05 am-6:23 pm

1 stop6h 18m

Denver Intl

Tue 2/17

7:45 am-9:24 am

Nonstop2h 39m

$157

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Sat 2/14

3:15 pm-10:37 pm

1 stop6h 22m

Denver Intl

Fri 2/20

6:20 pm-11:46 pm

1 stop6h 26m

$197

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Thu 3/5

10:37 am-6:08 pm

1 stop6h 31m

Denver Intl

Sun 3/8

6:20 pm-11:48 pm

1 stop6h 28m

$197

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Tue 12/30

9:14 pm-8:55 am

1 stop10h 41m

Denver Intl

Sun 1/4

6:15 am-10:13 am

1 stop4h 58m

$218

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Mon 12/29

2:10 pm-12:25 am

1 stop9h 15m

Denver Intl

Fri 1/2

10:29 pm-11:59 pm

Nonstop2h 30m

$235

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Fri 2/13

10:37 am-6:08 pm

1 stop6h 31m

Denver Intl

Sun 2/15

3:59 pm-9:47 pm

1 stop6h 48m

$247

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Thu 1/1

3:44 pm-7:18 pm

Nonstop2h 34m

Denver Intl

Sun 1/4

6:00 am-7:51 am

Nonstop2h 51m

$267

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Fri 1/2

7:40 pm-12:35 am

1 stop3h 55m

Denver Intl

Mon 1/5

5:40 am-7:15 am

Nonstop2h 35m

$272

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 21 results
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Best time to book a flight from San Diego to Estes Park

Have a flexible travel schedule? Discover the best time to fly to Estes Park from San Diego with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Diego to Estes Park

How far ahead should I book a flight from San Diego to Estes Park?

Use this chart to determine the optimal time to book a round-trip flight from San Diego to Estes Park. Price data was last updated on December 12, 2025.

The best time to book flights from San Diego to Estes Park is 39 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from San Diego to Estes Park?

Currently, January is the cheapest month in which you can book a flight from San Diego to Estes Park (average of $24). Flying from San Diego to Estes Park in June is currently the most expensive (average of $86). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SAN to ES9?

Find hourly flight availability from San Diego to Estes Park. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

One of the essential ways to save on airfare from San Diego to Estes Park is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 28% on airfare.

What is the cheapest day to fly from San Diego to Estes Park?

Use this chart to determine the cheapest time to fly round-trip from San Diego to Estes Park. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their San Diego to Estes Park flight should consider departing on Saturday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from San Diego to Estes Park

Explore weekly flight availability from San Diego to Estes Park. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 15, 2025.

The most flights from SAN to ES9 are scheduled on a Monday (36 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (13 on average).

Reviews of airlines servicing Estes Park

Get insights into the airlines that provide service to Estes Park. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Estes Park. Reviews last updated December 15, 2025.
Read through reviews of airlines operating flights from San Diego to Estes Park, such as Alaska Airlines, Southwest, and Hawaiian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,455 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Alaska Airlines
8.0
Very good
11,455 reviews
Alaska Airlines
8.0
Very good
11,455 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Southwest
7.9
Good
4,250 reviews
Alaska Airlines
8.0
Very good
11,455 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Hawaiian Airlines
7.8
Good
2,819 reviews
Alaska Airlines
8.0
Very good
11,455 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
United Airlines
7.4
Good
9,094 reviews
Alaska Airlines
8.0
Very good
11,455 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Frontier
5.8
Fair
3,082 reviews
Alaska Airlines
8.0
Very good
11,455 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.

Related info for your journey

Find useful and relevant information for your journey from San Diego to Estes Park. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from San Diego to Estes Park?

    If you book a flight to Estes Park from San Diego, you will be flying from San Diego, which is the city’s only airport. San Diego (SAN) is located 2.6 mi from the center of San Diego. There are 26 flights from San Diego to Estes Park per day from 5 different airlines.

  • How popular is this San Diego to Estes Park flight route?

    Within the past month, 219 users have taken a look at flights from San Diego to Estes Park.

  • How long is the flight from San Diego to Estes Park?

    United Airlines, Southwest, and Delta can get you from San Diego to Estes Park in just under 2h 31m. Your travel time can differ by up to 3h 51m. The distance between San Diego and Estes Park is about 852 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from San Diego to Estes Park one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $36. However, be on the lookout for offers from Hawaiian Airlines and Alaska Airlines, as they are both options that can get you from San Diego to Estes Park for a low price.

  • What are the most reliable airlines from San Diego to Estes Park?

    Before booking your flight to Estes Park from San Diego, check out the most reliable airlines to get you to your destination on time: Lufthansa (93%), Air Canada (91%), SkyWest Airlines( 91%).

  • What are the cheapest flights from San Diego to Estes Park?

    On average you can expect to pay $816 for a flight from San Diego to Estes Park. The cheapest flight overall is $48 while the most popular route, (San Diego - Denver Intl) is currently priced at $62.

  • Can I find deals for flights from San Diego to Estes Park that include hotel bookings?

    Yes. In addition to deals on San Diego to Estes Park flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Diego to Estes Park?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Estes Park.

  • Can I find deals for business class flights from San Diego to Estes Park?

    Yes. Cheapflights offers flight deals from San Diego to Estes Park by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Diego to Estes Park?

    Currently, January is the cheapest month in which you can book a flight from San Diego to Estes Park (average of $24). Flying from San Diego to Estes Park in June is currently the most expensive (average of $86). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 5 airlines flying from San Diego to Estes Park

Discover the top 5 airlines that operate flights from San Diego to Estes Park. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$158FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$68Average$192FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$102Average$189FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$123Average$257FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$143Average$305FlexibilityNo cancel feeOn-time69%

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