$89+ Cheap flights from San Diego to Denver (SAN - DEN)
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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
Sep 13 — Sep 201
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from San Diego to Denver with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from San Diego to Denver Intl are usually found in February or January, booked 63 days in advance, depart on a Friday or Saturday and return on a Thursday
Cheap flight deals from San Diego to Denver
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Diego to DenverExplore the most affordable flight options available from San Diego to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2026.
Explore the most affordable flight options available from San Diego to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/134:54 pm -
Nonstop2h 28m
Tue 9/152:29 pm -
Nonstop2h 30m
Deal found 8/14![Frontier logo]()
$111
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:53 pm -
Nonstop2h 31m
Fri 10/1610:29 pm -
1 stop20h 37m
Deal found 8/14![Frontier logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Sat 9/266:25 am -
Nonstop2h 34m
Thu 10/110:29 pm -
Nonstop2h 22m
Deal found 8/12![Frontier logo]()
$115
This Super.com deal was found by Cheapflights users on 8/13. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/43:45 pm -
Nonstop2h 35m
Wed 9/910:29 pm -
Nonstop2h 22m
Deal found 8/13![Frontier logo]()
$116
This Cheapflightsfares deal was found by Cheapflights users on 8/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:54 pm -
Nonstop2h 28m
Sun 9/272:29 pm -
Nonstop2h 30m
Deal found 8/13![Frontier logo]()
$117
This Cheapflightsfares deal was found by Cheapflights users on 8/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:25 am -
Nonstop2h 38m
Thu 9/1010:29 pm -
Nonstop2h 22m
Deal found 8/13![Frontier logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/43:45 pm -
Nonstop2h 35m
Sat 9/510:29 pm -
Nonstop2h 22m
Deal found 8/13![Frontier logo]()
$119
This Cheapflightsfares deal was found by Cheapflights users on 8/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/94:54 pm -
Nonstop2h 28m
Mon 9/146:38 pm -
1 stop23h 21m
Deal found 8/12![Frontier logo]()
$120
This Super.com deal was found by Cheapflights users on 8/13. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/43:45 pm -
Nonstop2h 35m
Mon 9/77:40 am -
Nonstop2h 25m
Deal found 8/13![Frontier logo]()
$121
This Super.com deal was found by Cheapflights users on 8/13. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/174:54 pm -
Nonstop2h 28m
Sun 9/2010:29 pm -
Nonstop2h 22m
Deal found 8/13![Frontier logo]()
$122
This Frontier deal was found by Cheapflights users on 8/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:25 am -
Nonstop2h 38m
Wed 9/910:29 pm -
Nonstop2h 22m
Deal found 8/10![Frontier logo]()
$123
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1010:28 am -
1 stop22h 18m
Sat 9/122:28 pm -
Nonstop2h 30m
Deal found 8/14![Frontier logo]()
$124
Best flights from San Diego to DenverDiscover carefully curated flight deals from San Diego to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2026.
Discover carefully curated flight deals from San Diego to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2026.
This Southwest deal was found by Cheapflights users on 8/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/251:50 pm -
Nonstop2h 25m
Mon 9/2810:30 am -
Nonstop2h 25m
Deal found 8/9![Southwest logo]()
$217
This United Airlines deal was found by Cheapflights users on 8/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:37 pm -
Nonstop2h 33m
Sat 9/127:43 am -
Nonstop2h 22m
Deal found 8/13![United Airlines logo]()
$269
This Alaska Airlines deal was found by Cheapflights users on 8/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:15 am -
1 stop9h 55m
Wed 9/308:22 am -
2 stops11h 38m
Deal found 8/9![Alaska Airlines logo]()
$380
This Southwest deal was found by Cheapflights users on 8/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/261:55 pm -
1 stop4h 45m
Sat 10/34:15 pm -
2 stops5h 50m
Deal found 8/12![Southwest logo]()
$254
This Southwest deal was found by Cheapflights users on 8/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/225:20 pm -
1 stop4h 45m
Sun 10/258:30 am -
1 stop3h 45m
Deal found 8/9![Southwest logo]()
$272
This Southwest deal was found by Cheapflights users on 8/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:35 pm -
Nonstop2h 25m
Sun 9/138:15 am -
Nonstop2h 25m
Deal found 8/9![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 8/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:57 am -
1 stop6h 12m
Tue 10/2712:57 pm -
2 stops7h 17m
Deal found 8/10![Delta logo]()
$701
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:15 am -
1 stop6h 47m
Wed 8/2612:02 pm -
2 stops11h 57m
Deal found 8/11![Alaska Airlines logo]()
$451
This Alaska Airlines deal was found by Cheapflights users on 8/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2911:06 am -
1 stop6h 26m
Wed 9/28:22 am -
2 stops9h 48m
Deal found 8/13![Alaska Airlines logo]()
$477
This Delta deal was found by Cheapflights users on 8/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/115:09 pm -
1 stop4h 51m
Sun 11/1510:45 am -
2 stops9h 31m
Deal found 8/10![Delta logo]()
$705
This Delta deal was found by Cheapflights users on 8/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/86:15 am -
1 stop4h 41m
Fri 11/137:50 am -
2 stops8h 13m
Deal found 8/10![Delta logo]()
$715
This Delta deal was found by Cheapflights users on 8/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/21:17 pm -
1 stop5h 44m
Sat 9/57:05 am -
2 stops9h 05m
Deal found 8/13![Delta logo]()
$746
Last-minute flights from San Diego to DenverDiscover last-minute flight deals from San Diego to Denver. Data last updated August 14, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Denver. Data last updated August 14, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 8/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:59 pm -
1 stop26h 11m
Tue 8/257:40 am -
Nonstop2h 25m
Deal found 8/11![Frontier logo]()
$227
This Cheapflightsfares deal was found by Cheapflights users on 8/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2010:00 am -
1 stop22h 41m
Thu 8/2710:29 pm -
Nonstop2h 22m
Deal found 8/10![Frontier logo]()
$242
This Frontier deal was found by Cheapflights users on 8/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:25 am -
Nonstop2h 38m
Tue 8/2510:29 pm -
Nonstop2h 22m
Deal found 8/9![Frontier logo]()
$218
This Cheapflightsfares deal was found by Cheapflights users on 8/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:25 am -
Nonstop2h 38m
Thu 8/2710:29 pm -
Nonstop2h 22m
Deal found 8/10![Frontier logo]()
$211
This Cheapflightsfares deal was found by Cheapflights users on 8/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/244:36 pm -
1 stop6h 39m
Wed 9/302:29 pm -
Nonstop2h 30m
Deal found 8/13![Frontier logo]()
$212
This Cheapflightsfares deal was found by Cheapflights users on 8/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/244:36 pm -
1 stop6h 39m
Thu 9/242:29 pm -
Nonstop2h 30m
Deal found 8/13![Frontier logo]()
$223
One-way flights from San Diego to DenverSearch for one-way flight options from San Diego to Denver. Find affordable one-way fares based on user searches. Data last updated August 14, 2026.
Search for one-way flight options from San Diego to Denver. Find affordable one-way fares based on user searches. Data last updated August 14, 2026.
This Frontier deal was found by Cheapflights users on 8/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:45 pm -
1 stop12h 30m
Deal found 8/13![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 8/9. 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 9/910:00 am -
1 stop7h 15m
Deal found 8/9![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 8/10. 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.
Fri 11/69:57 am -
1 stop4h 36m
Deal found 8/10![Frontier logo]()
$91
This Super.com deal was found by Cheapflights users on 8/11. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/46:25 am -
Nonstop2h 34m
Deal found 8/11![Frontier logo]()
$92
This Southwest deal was found by Cheapflights users on 8/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/129:15 pm -
Nonstop2h 25m
Deal found 8/12![Southwest logo]()
$95
This WAYA deal was found by Cheapflights users on 8/14. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/266:25 am -
1 stop6h 52m
Deal found 8/14![Frontier logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 9/110:00 am -
2 stops22h 05m
Deal found 8/12![Frontier logo]()
$97
This United Airlines deal was found by Cheapflights users on 8/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:30 am -
Nonstop2h 36m
Deal found 8/9![United Airlines logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:25 am -
2 stops20h 23m
Deal found 8/13![Frontier logo]()
$100
This Southwest deal was found by Cheapflights users on 8/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:30 pm -
1 stop4h 35m
Deal found 8/10![Southwest logo]()
$101
Find flight deals from San Diego to Denver
Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $111 (Cheapflightsfares) |
One-way from | $89 (Frontier) |
Popular in | June |
Cheapest in | February |
Average price | $238 |
Good round-trip deal | $258 or less |
Good one-way deal | $159 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from San Diego to Denver 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 August 14, 2026.
Use the filters below to find and compare flights from San Diego to Denver that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
San DiegoDenver
SAN San Diego - DEN Denver Intl
SANDEN
San Diego
Fri 9/25
1:50 pm-5:15 pm
Nonstop2h 25m
Denver Intl
Mon 9/28
10:30 am-11:55 am
Nonstop2h 25m
$217
San DiegoDenver
SAN San Diego - DEN Denver Intl
SANDEN
San Diego
Sat 9/26
1:55 pm-7:40 pm
1 stop4h 45m
Denver Intl
Sat 10/3
4:15 pm-9:05 pm
2 stops5h 50m
$254
San DiegoDenver
SAN San Diego - DEN Denver Intl
SANDEN
San Diego
Thu 9/10
12:37 pm-4:10 pm
Nonstop2h 33m
Denver Intl
Sat 9/12
7:43 am-9:05 am
Nonstop2h 22m
$269
San DiegoDenver
SAN San Diego - DEN Denver Intl
SANDEN
San Diego
Thu 10/22
5:20 pm-11:05 pm
1 stop4h 45m
Denver Intl
Sun 10/25
8:30 am-11:15 am
1 stop3h 45m
$272
San DiegoDenver
SAN San Diego - DEN Denver Intl
SANDEN
San Diego
Sun 9/6
7:35 pm-11:00 pm
Nonstop2h 25m
Denver Intl
Sun 9/13
8:15 am-9:40 am
Nonstop2h 25m
$287
San DiegoDenver
SAN San Diego - DEN Denver Intl
SANDEN
San Diego
Sun 9/27
7:15 am-6:10 pm
1 stop9h 55m
Denver Intl
Wed 9/30
8:22 am-7:00 pm
2 stops11h 38m
$380
San DiegoDenver
SAN San Diego - DEN Denver Intl
SANDEN
San Diego
Tue 8/25
6:15 am-2:02 pm
1 stop6h 47m
Denver Intl
Wed 8/26
12:02 pm-10:59 pm
2 stops11h 57m
$451
San DiegoDenver
SAN San Diego - DEN Denver Intl
SANDEN
San Diego
Sat 8/29
11:06 am-6:32 pm
1 stop6h 26m
Denver Intl
Wed 9/2
8:22 am-5:10 pm
2 stops9h 48m
$477
San DiegoDenver
SAN San Diego - DEN Denver Intl
SANDEN
San Diego
Thu 10/22
10:57 am-6:09 pm
1 stop6h 12m
Denver Intl
Tue 10/27
12:57 pm-7:14 pm
2 stops7h 17m
$701
San DiegoDenver
SAN San Diego - DEN Denver Intl
SANDEN
San Diego
Wed 11/11
5:09 pm-11:00 pm
1 stop4h 51m
Denver Intl
Sun 11/15
10:45 am-7:16 pm
2 stops9h 31m
$705
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from San Diego to Denver
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Diego to Denver in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on San Diego-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Diego-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Diego-Denver flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Diego-Denver flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Diego-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from San Diego to Denver
Have a flexible travel schedule? Discover the best time to fly to Denver from San Diego with our price prediction graph.
SAN-DEN
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 Denver
Prices
Airlines
Delays
How far ahead should I book a flight from San Diego to Denver?
The best time to book flights from San Diego to Denver is 62 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 Denver?
Currently, February is the cheapest month in which you can book a flight from San Diego to Denver (average of $128). Flying from San Diego to Denver in June is currently the most expensive (average of $279). 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 DEN?
Find hourly flight availability from San Diego to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2026.
It’s typically best to fly out from San Diego to Denver in the evening. Doing so could potentially save you 26% on the flight price compared to flying in the morning, which is usually more expensive.
What is the cheapest day to fly from San Diego to Denver?
Use this chart to determine the cheapest time to fly round-trip from San Diego to Denver. Price data was last updated on August 8, 2026.
Travelers seeking maximum savings on their San Diego to Denver flight should consider departing on Tuesday at noon when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from San Diego to Denver delayed?
About 15% of weekly flights between San Diego and Denver have experienced delays in the past year, with the average delay time being 138 minutes.
What is the most punctual flight time for San Diego to Denver flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on San Diego to Denver flights?
Over the last year, United Airlines have had the lowest number of delays on this route, with just 10% of flights being delayed.
The best insider tips for San Diego to Denver flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your San Diego to Denver trip
Our travel experts
Reviews of airlines servicing Denver
Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated August 14, 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, andHawaiian Airlines from San Diego to Denver. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from San Diego to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Denver?
Book flights to Denver if you plan to visit one of these locationsThornton
Westminster
Black Hawk
Lakewood
Centennial
Broomfield
Golden
Wheat Ridge
Silverthorne
Central City
Fort Morgan
Cripple Creek
Greeley
Winter Park
Limon
Manitou Springs
Frisco
Englewood
Glendale
Evergreen
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Denver flight routes
Flights by cabin class
Other flight options
Other flights from San Diego
Popular flights
Alternative routes for San Diego to Denver
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Denver by adding a car rental and/or hotel reservation to your travel itinerary.
Other flights to Denver
Explore flights to Denver departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 14, 2026.
Search flights from San Diego to Denver by cabin class
Find flights from San Diego to Denver, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Diego and Denver flights
Browse other San Diego and Denver flight options. Last updated on August 14, 2026.
Other flights from San Diego
Browse through other flights departing from San Diego. Flights are based on user searches made on Cheapflights and were last updated on August 14, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 5 airlines flying from San Diego to Denver
Discover the top 5 airlines that operate flights from San Diego to Denver. 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 August 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$47 | Average$141 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$58 | Average$137 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$115 | Average$209 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$117 | Average$255 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$117 | Average$275 | FlexibilityNo cancel fee | On-time69% |