$55+ 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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
Apr 19 — Apr 261
Round-trip
1 adult, Economy
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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 December, booked 39 days in advance, depart on a Friday or Thursday 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 March 20, 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 March 20, 2026.
This Trip.com deal was found by Cheapflights users on 3/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/106:25 am
SAN
- DEN
Nonstop2h 40m
Frontier
Mon 4/1310:30 pm
DEN
- SAN
Nonstop2h 32m
Frontier
Deal found 3/18![Frontier logo]()
$59
This Cheapflightsfares deal was found by Cheapflights users on 3/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/236:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sun 4/267:00 am
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 3/15![Frontier logo]()
$68
This Cheapflightsfares deal was found by Cheapflights users on 3/17. 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.
Fri 5/86:25 am
SAN
- DEN
Nonstop2h 36m
Frontier
Sun 5/107:12 am
DEN
- SAN
Nonstop2h 30m
Frontier
Deal found 3/17![Frontier logo]()
$72
This Trip.com deal was found by Cheapflights users on 3/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/236:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sat 4/256:30 pm
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 3/16![Frontier logo]()
$80
This eDestinos deal was found by Cheapflights users on 3/17. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2312:25 pm
SAN
- DEN
Nonstop2h 34m
Frontier
Tue 4/289:30 pm
DEN
- SAN
Nonstop2h 36m
Frontier
Deal found 3/17![Frontier logo]()
$81
This Super.com deal was found by Cheapflights users on 3/16. 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 4/306:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sun 5/37:00 am
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 3/16![Frontier logo]()
$91
This WAYA deal was found by Cheapflights users on 3/17. 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 4/1512:29 pm
SAN
- DEN
1 stop8h 15m
Frontier
Sun 4/197:00 am
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 3/17![Frontier logo]()
$93
This Cheapflightsfares deal was found by Cheapflights users on 3/16. 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.
Fri 4/176:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sun 4/197:00 am
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 3/16![Frontier logo]()
$94
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 March 20, 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 March 20, 2026.
This Southwest deal was found by Cheapflights users on 3/16. 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 4/306:55 am
SAN
- DEN
1 stop5h 05m
Southwest
Fri 5/18:10 pm
DEN
- SAN
1 stop3h 55m
Southwest
Deal found 3/16![Southwest logo]()
$137
This Delta deal was found by Cheapflights users on 3/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:20 am
SAN
- DEN
1 stop4h 38m
Delta
Sat 4/114:00 pm
DEN
- SAN
1 stop6h 55m
Delta
Deal found 3/15![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 3/19. 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 4/176:50 pm
SAN
- DEN
1 stop3h 55m
Southwest
Fri 4/242:25 pm
DEN
- SAN
Nonstop2h 25m
Southwest
Deal found 3/19![Southwest logo]()
$143
This Southwest deal was found by Cheapflights users on 3/19. 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.
Tue 4/146:30 pm
SAN
- DEN
1 stop4h 35m
Southwest
Fri 4/175:10 pm
DEN
- SAN
1 stop3h 45m
Southwest
Deal found 3/19![Southwest logo]()
$152
This Southwest deal was found by Cheapflights users on 3/19. 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 5/169:40 am
SAN
- DEN
1 stop5h 45m
Southwest
Sat 5/231:20 pm
DEN
- SAN
1 stop4h 35m
Southwest
Deal found 3/19![Southwest logo]()
$222
This Southwest deal was found by Cheapflights users on 3/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/157:35 pm
SAN
- DEN
Nonstop2h 20m
Southwest
Thu 6/186:00 am
DEN
- SAN
Nonstop2h 25m
Southwest
Deal found 3/15![Southwest logo]()
$257
This Southwest deal was found by Cheapflights users on 3/18. 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.
Wed 5/208:40 am
SAN
- DEN
2 stops5h 25m
Southwest
Mon 5/256:25 pm
DEN
- SAN
1 stop4h 35m
Southwest
Deal found 3/18![Southwest logo]()
$333
This Southwest deal was found by Cheapflights users on 3/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/172:40 pm
SAN
- DEN
2 stops7h 25m
Southwest
Mon 6/228:10 pm
DEN
- SAN
1 stop3h 55m
Southwest
Deal found 3/15![Southwest logo]()
$428
This Southwest deal was found by Cheapflights users on 3/18. 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 3/277:30 pm
SAN
- DEN
1 stop4h 10m
Southwest
Mon 3/305:10 pm
DEN
- SAN
2 stops5h 25m
Southwest
Deal found 3/18![Southwest logo]()
$433
This Delta deal was found by Cheapflights users on 3/19. 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 4/233:15 pm
SAN
- DEN
2 stops6h 14m
Delta
Sun 4/266:51 pm
DEN
- SAN
1 stop4h 45m
Delta
Deal found 3/19![Delta logo]()
$775
This Southwest deal was found by Cheapflights users on 3/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/267:10 am
SAN
- DEN
1 stop4h 10m
Southwest
Thu 3/265:10 pm
DEN
- SAN
2 stops5h 25m
Southwest
Deal found 3/15![Southwest logo]()
$588
This Southwest deal was found by Cheapflights users on 3/17. 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 6/183:45 pm
SAN
- DEN
1 stop4h 05m
Southwest
Sun 6/217:50 am
DEN
- SAN
2 stops6h 40m
Southwest
Deal found 3/17![Southwest logo]()
$608
Last-minute flights from San Diego to DenverDiscover last-minute flight deals from San Diego to Denver. Data last updated March 20, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Denver. Data last updated March 20, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 3/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/106:25 am
SAN
- DEN
Nonstop2h 40m
Frontier
Mon 4/1310:30 pm
DEN
- SAN
Nonstop2h 32m
Frontier
Deal found 3/18![Frontier logo]()
$59
This WAYA deal was found by Cheapflights users on 3/17. 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 4/1512:29 pm
SAN
- DEN
1 stop8h 15m
Frontier
Sun 4/197:00 am
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 3/17![Frontier logo]()
$93
This Cheapflightsfares deal was found by Cheapflights users on 3/16. 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.
Fri 4/176:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sun 4/197:00 am
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 3/16![Frontier logo]()
$94
This Cheapflightsfares deal was found by Cheapflights users on 3/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/236:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sun 4/267:00 am
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 3/15![Frontier logo]()
$68
This Trip.com deal was found by Cheapflights users on 3/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/236:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sat 4/256:30 pm
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 3/16![Frontier logo]()
$80
This eDestinos deal was found by Cheapflights users on 3/17. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2312:25 pm
SAN
- DEN
Nonstop2h 34m
Frontier
Tue 4/289:30 pm
DEN
- SAN
Nonstop2h 36m
Frontier
Deal found 3/17![Frontier logo]()
$81
This Super.com deal was found by Cheapflights users on 3/16. 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 4/306:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sun 5/37:00 am
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 3/16![Frontier logo]()
$91
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 March 20, 2026.
Search for one-way flight options from San Diego to Denver. Find affordable one-way fares based on user searches. Data last updated March 20, 2026.
This Trip.com deal was found by Cheapflights users on 3/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:05 pm
SAN
- DEN
Nonstop2h 39m
Hawaiian Airlines
Deal found 3/15![Hawaiian Airlines logo]()
$55
This Alaska Airlines deal was found by Cheapflights users on 3/16. 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.
Mon 4/208:05 pm
SAN
- DEN
Nonstop2h 39m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$59
This Super.com deal was found by Cheapflights users on 3/18. 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.
Mon 4/206:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Deal found 3/18![Frontier logo]()
$63
This Frontier deal was found by Cheapflights users on 3/20. 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.
Sun 5/109:37 am
SAN
- DEN
Nonstop2h 30m
Frontier
Deal found 3/20![Frontier logo]()
$64
This Kiwi.com deal was found by Cheapflights users on 3/16. 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.
Mon 5/48:38 am
SAN
- DEN
1 stop28h 22m
Frontier
Deal found 3/16![Frontier logo]()
$65
This Frontier deal was found by Cheapflights users on 3/17. 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 5/156:25 am
SAN
- DEN
Nonstop2h 36m
Frontier
Deal found 3/17![Frontier logo]()
$66
This eDestinos deal was found by Cheapflights users on 3/17. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:25 am
SAN
- DEN
Nonstop2h 35m
Frontier
Deal found 3/17![Frontier logo]()
$68
This United Airlines deal was found by Cheapflights users on 3/18. 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.
Fri 4/107:14 pm
SAN
- DEN
Nonstop2h 31m
United Airlines
Deal found 3/18![United Airlines logo]()
$69
This Frontier deal was found by Cheapflights users on 3/19. 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.
Mon 4/138:54 pm
SAN
- DEN
1 stop6h 05m
Frontier
Deal found 3/19![Frontier logo]()
$70
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 6/29:37 am
SAN
- DEN
Nonstop2h 30m
Frontier
Deal found 3/17![Frontier logo]()
$73
This Frontier deal was found by Cheapflights users on 3/19. 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.
Tue 6/166:25 am
SAN
- DEN
Nonstop2h 41m
Frontier
Deal found 3/19![Frontier logo]()
$74
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 March 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $59 (Trip.com) |
One-way from | $55 (Trip.com) |
Popular in | June |
Cheapest in | February |
Average price | $198 |
Good round-trip deal | $179 or less |
Good one-way deal | $118 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 March 20, 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
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Thu 4/30
6:55 am-1:00 pm
1 stop5h 05m
Denver Intl
Fri 5/1
8:10 pm-11:05 pm
1 stop3h 55m
$137
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Fri 4/17
6:50 pm-11:45 pm
1 stop3h 55m
Denver Intl
Fri 4/24
2:25 pm-3:50 pm
Nonstop2h 25m
$143
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Tue 4/14
6:30 pm-12:05 am
1 stop4h 35m
Denver Intl
Fri 4/17
5:10 pm-7:55 pm
1 stop3h 45m
$152
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Tue 4/7
6:20 am-11:58 am
1 stop4h 38m
Denver Intl
Sat 4/11
4:00 pm-9:55 pm
1 stop6h 55m
$217
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Sat 5/16
9:40 am-4:25 pm
1 stop5h 45m
Denver Intl
Sat 5/23
1:20 pm-4:55 pm
1 stop4h 35m
$222
Quickest round-trip
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Mon 6/15
7:35 pm-10:55 pm
Nonstop2h 20m
Denver Intl
Thu 6/18
6:00 am-7:25 am
Nonstop2h 25m
$257
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Wed 5/20
8:40 am-3:05 pm
2 stops5h 25m
Denver Intl
Mon 5/25
6:25 pm-10:00 pm
1 stop4h 35m
$333
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Wed 6/17
2:40 pm-11:05 pm
2 stops7h 25m
Denver Intl
Mon 6/22
8:10 pm-11:05 pm
1 stop3h 55m
$428
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Fri 3/27
7:30 pm-12:40 am
1 stop4h 10m
Denver Intl
Mon 3/30
5:10 pm-9:35 pm
2 stops5h 25m
$433
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Thu 3/26
7:10 am-12:20 pm
1 stop4h 10m
Denver Intl
Thu 3/26
5:10 pm-9:35 pm
2 stops5h 25m
$588
Showing 1-10 of 21 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 March.
| 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*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- 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?
Use this chart to determine the optimal time to book a round-trip flight from San Diego to Denver. Price data was last updated on March 13, 2026.
The best time to book flights from San Diego to Denver 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 Denver?
Currently, January is the cheapest month in which you can book a flight from San Diego to Denver (average of $38). Flying from San Diego to Denver in May is currently the most expensive (average of $70). 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 March 20, 2026.
It’s typically best to fly out from San Diego to Denver in the evening. Doing so could potentially save you 32% on the flight price compared to flying in the afternoon, 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 March 14, 2026.
Travelers seeking maximum savings on their San Diego to Denver flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday 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 16% of weekly flights between San Diego and Denver have experienced delays in the past year, with the average delay time being 140 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 12% 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
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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 March 20, 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.
Entertainment
7.5
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
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
Black Hawk
Lakewood
Broomfield
Westminster
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Central City
Cripple Creek
Winter Park
Glendale
Manitou Springs
Frisco
Englewood
Fort Morgan
Brighton
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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 March 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$53 | Average$155 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$68 | Average$177 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$107 | Average$194 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$117 | Average$246 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$119 | Average$283 | FlexibilityNo cancel fee | On-time69% |