$52+ 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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
May 23 — May 301
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 April 23, 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 April 23, 2026.
This Super.com deal was found by Cheapflights users on 4/21. 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 5/116:25 am
SAN
- DEN
Nonstop2h 36m
Frontier
Wed 5/1310:29 pm
DEN
- SAN
Nonstop2h 21m
Frontier
Deal found 4/21![Frontier logo]()
$81
This Frontier deal was found by Cheapflights users on 4/21. 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 5/116:25 am
SAN
- DEN
Nonstop2h 36m
Frontier
Fri 5/1510:29 pm
DEN
- SAN
Nonstop2h 21m
Frontier
Deal found 4/21![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 4/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/211:42 am
SAN
- DEN
Nonstop2h 41m
Frontier
Sat 5/910:29 pm
DEN
- SAN
Nonstop2h 21m
Frontier
Deal found 4/18![Frontier logo]()
$83
This Frontier deal was found by Cheapflights users on 4/20. 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 5/36:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sat 5/1610:29 pm
DEN
- SAN
Nonstop2h 21m
Frontier
Deal found 4/20![Frontier logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 5/246:25 am
SAN
- DEN
Nonstop2h 36m
Frontier
Sat 6/69:03 am
DEN
- SAN
1 stop7h 28m
Frontier
Deal found 4/21![Frontier logo]()
$87
This WAYA deal was found by Cheapflights users on 4/22. 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.
Thu 5/141:38 pm
SAN
- DEN
1 stop4h 35m
Frontier
Sun 5/177:12 am
DEN
- SAN
Nonstop2h 30m
Frontier
Deal found 4/22![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 5/126:25 am
SAN
- DEN
Nonstop2h 36m
Frontier
Wed 5/139:03 am
DEN
- SAN
1 stop7h 28m
Frontier
Deal found 4/21![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 4/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:25 am
SAN
- DEN
Nonstop2h 36m
Frontier
Sat 5/306:45 am
DEN
- SAN
1 stop9h 46m
Frontier
Deal found 4/20![Frontier logo]()
$91
This Super.com deal was found by Cheapflights users on 4/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/79:37 am
SAN
- DEN
Nonstop2h 30m
Frontier
Thu 5/147:12 am
DEN
- SAN
Nonstop2h 30m
Frontier
Deal found 4/20![Frontier logo]()
$93
This Frontier deal was found by Cheapflights users on 4/21. 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 5/89:37 am
SAN
- DEN
Nonstop2h 30m
Frontier
Tue 5/1210:29 pm
DEN
- SAN
Nonstop2h 21m
Frontier
Deal found 4/21![Frontier logo]()
$94
This Frontier deal was found by Cheapflights users on 4/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/412:25 pm
SAN
- DEN
Nonstop2h 34m
Frontier
Tue 5/1210:29 pm
DEN
- SAN
Nonstop2h 21m
Frontier
Deal found 4/18![Frontier logo]()
$95
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 April 23, 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 April 23, 2026.
This Southwest deal was found by Cheapflights users on 4/19. 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 6/27:55 am
SAN
- DEN
Nonstop2h 25m
Southwest
Sun 6/75:45 am
DEN
- SAN
Nonstop2h 20m
Southwest
Deal found 4/19![Southwest logo]()
$192
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 6/237:00 am
SAN
- DEN
Nonstop2h 33m
Alaska Airlines
Wed 6/244:36 pm
DEN
- SAN
1 stop8h 20m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$612
This Southwest deal was found by Cheapflights users on 4/19. 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 7/212:40 pm
SAN
- DEN
2 stops7h 25m
Southwest
Mon 7/278:35 pm
DEN
- SAN
1 stop3h 50m
Southwest
Deal found 4/19![Southwest logo]()
$318
This Southwest deal was found by Cheapflights users on 4/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/239:40 am
SAN
- DEN
1 stop5h 45m
Southwest
Sun 5/241:40 pm
DEN
- SAN
2 stops6h 15m
Southwest
Deal found 4/20![Southwest logo]()
$354
This Delta deal was found by Cheapflights users on 4/21. 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 6/410:59 am
SAN
- DEN
2 stops7h 16m
Delta
Mon 6/87:00 pm
DEN
- SAN
1 stop5h 53m
Delta
Deal found 4/21![Delta logo]()
$795
This Southwest deal was found by Cheapflights users on 4/23. 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 6/276:40 am
SAN
- DEN
2 stops6h 10m
Southwest
Sun 7/55:55 am
DEN
- SAN
1 stop3h 50m
Southwest
Deal found 4/23![Southwest logo]()
$362
This Southwest deal was found by Cheapflights users on 4/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:50 pm
SAN
- DEN
1 stop3h 55m
Southwest
Sun 6/77:50 am
DEN
- SAN
2 stops6h 40m
Southwest
Deal found 4/20![Southwest logo]()
$377
This Delta deal was found by Cheapflights users on 4/23. 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 5/1010:59 am
SAN
- DEN
2 stops7h 16m
Delta
Tue 5/121:15 pm
DEN
- SAN
1 stop5h 48m
Delta
Deal found 4/23![Delta logo]()
$835
This Delta deal was found by Cheapflights users on 4/23. 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.
Fri 5/83:15 pm
SAN
- DEN
2 stops6h 25m
Delta
Mon 5/117:55 am
DEN
- SAN
1 stop5h 22m
Delta
Deal found 4/23![Delta logo]()
$835
This Delta deal was found by Cheapflights users on 4/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/1510:54 am
SAN
- DEN
2 stops8h 07m
Delta
Sat 7/183:55 pm
DEN
- SAN
1 stop7h 20m
Delta
Deal found 4/18![Delta logo]()
$835
This Delta deal was found by Cheapflights users on 4/23. 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.
Sat 5/93:15 pm
SAN
- DEN
2 stops6h 25m
Delta
Mon 5/116:19 pm
DEN
- SAN
1 stop6h 24m
Delta
Deal found 4/23![Delta logo]()
$835
Last-minute flights from San Diego to DenverDiscover last-minute flight deals from San Diego to Denver. Data last updated April 23, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Denver. Data last updated April 23, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 4/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:15 am
SAN
- DEN
Nonstop2h 35m
Frontier
Wed 4/296:25 pm
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 4/20![Frontier logo]()
$97
This Cheapflightsfares deal was found by Cheapflights users on 4/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2910:30 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sun 5/37:00 am
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 4/19![Frontier logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 4/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/211:42 am
SAN
- DEN
Nonstop2h 41m
Frontier
Sat 5/910:29 pm
DEN
- SAN
Nonstop2h 21m
Frontier
Deal found 4/18![Frontier logo]()
$83
This Cheapflightsfares deal was found by Cheapflights users on 4/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/22:12 pm
SAN
- DEN
1 stop9h 07m
Frontier
Mon 5/117:12 am
DEN
- SAN
Nonstop2h 30m
Frontier
Deal found 4/19![Frontier logo]()
$117
This Cheapflightsfares deal was found by Cheapflights users on 4/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/211:42 am
SAN
- DEN
Nonstop2h 41m
Frontier
Mon 5/47:00 am
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 4/19![Frontier logo]()
$121
This Frontier deal was found by Cheapflights users on 4/20. 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 5/36:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Wed 5/1310:29 pm
DEN
- SAN
Nonstop2h 21m
Frontier
Deal found 4/20![Frontier logo]()
$84
This Frontier deal was found by Cheapflights users on 4/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/36:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sun 5/107:12 am
DEN
- SAN
Nonstop2h 30m
Frontier
Deal found 4/18![Frontier logo]()
$95
This Frontier deal was found by Cheapflights users on 4/20. 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 5/36:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sat 5/162:55 pm
DEN
- SAN
1 stop4h 04m
Frontier
Deal found 4/20![Frontier logo]()
$126
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 April 23, 2026.
Search for one-way flight options from San Diego to Denver. Find affordable one-way fares based on user searches. Data last updated April 23, 2026.
This Trip.com deal was found by Cheapflights users on 4/21. 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 6/16:25 am
SAN
- DEN
Nonstop2h 36m
Frontier
Deal found 4/21![Frontier logo]()
$52
This Priceline deal was found by Cheapflights users on 4/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/159:37 am
SAN
- DEN
Nonstop2h 30m
Frontier
Deal found 4/19![Frontier logo]()
$54
This Kiwi.com deal was found by Cheapflights users on 4/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Deal found 4/20![Frontier logo]()
$55
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 5/264:17 pm
SAN
- DEN
1 stop26h 08m
Frontier
Deal found 4/21![Frontier logo]()
$58
This CheapOair deal was found by Cheapflights users on 4/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/36:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Deal found 4/19![Frontier logo]()
$62
This Super.com deal was found by Cheapflights users on 4/21. 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.
Wed 6/176:25 am
SAN
- DEN
Nonstop2h 41m
Frontier
Deal found 4/21![Frontier logo]()
$63
This Super.com deal was found by Cheapflights users on 4/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/216:25 am
SAN
- DEN
Nonstop2h 36m
Frontier
Deal found 4/20![Frontier logo]()
$64
This Super.com deal was found by Cheapflights users on 4/19. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:25 am
SAN
- DEN
Nonstop2h 36m
Frontier
Deal found 4/19![Frontier logo]()
$65
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 April 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $81 (Super.com) |
One-way from | $52 (Trip.com) |
Popular in | June |
Cheapest in | February |
Average price | $177 |
Good round-trip deal | $193 or less |
Good one-way deal | $128 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 April 23, 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 - DEN
SANDEN
San Diego
Tue 6/2
7:55 am-11:20 am
Nonstop2h 25m
Denver Intl
Sun 6/7
5:45 am-7:05 am
Nonstop2h 20m
$192
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Tue 7/21
2:40 pm-11:05 pm
2 stops7h 25m
Denver Intl
Mon 7/27
8:35 pm-11:25 pm
1 stop3h 50m
$318
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Sat 5/23
9:40 am-4:25 pm
1 stop5h 45m
Denver Intl
Sun 5/24
1:40 pm-6:55 pm
2 stops6h 15m
$354
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Sat 6/27
6:40 am-1:50 pm
2 stops6h 10m
Denver Intl
Sun 7/5
5:55 am-8:45 am
1 stop3h 50m
$362
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Mon 6/1
6:50 pm-11:45 pm
1 stop3h 55m
Denver Intl
Sun 6/7
7:50 am-1:30 pm
2 stops6h 40m
$377
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Tue 6/23
7:00 am-10:33 am
Nonstop2h 33m
Denver Intl
Wed 6/24
4:36 pm-11:56 pm
1 stop8h 20m
$612
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Thu 6/4
10:59 am-7:15 pm
2 stops7h 16m
Denver Intl
Mon 6/8
7:00 pm-11:53 pm
1 stop5h 53m
$795
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Sun 5/10
10:59 am-7:15 pm
2 stops7h 16m
Denver Intl
Tue 5/12
1:15 pm-6:03 pm
1 stop5h 48m
$835
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Fri 5/8
3:15 pm-10:40 pm
2 stops6h 25m
Denver Intl
Mon 5/11
7:55 am-12:17 pm
1 stop5h 22m
$835
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Wed 7/15
10:54 am-8:01 pm
2 stops8h 07m
Denver Intl
Sat 7/18
3:55 pm-10:15 pm
1 stop7h 20m
$835
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 April.
| 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 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?
The best time to book flights from San Diego to Denver is 38 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 $127). Flying from San Diego to Denver in June is currently the most expensive (average of $243). 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 April 23, 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 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 April 18, 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. Tuesday 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 17% of weekly flights between San Diego and Denver have experienced delays in the past year, with the average delay time being 142 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 April 23, 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.
Comfort
8.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
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
Westminster
Broomfield
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Central City
Cripple Creek
Winter Park
Manitou Springs
Frisco
Englewood
Fort Morgan
Glendale
Evergreen
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San Diego and Denver flights
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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 April 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$53 | Average$152 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$68 | Average$177 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$106 | Average$197 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$117 | Average$233 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$117 | Average$274 | FlexibilityNo cancel fee | On-time69% |