$84+ Cheap flights from Denver to San Diego (DEN - SAN)
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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SAN
Sep 5 — Sep 121
Round-trip
1 adult, Economy
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Find cheap flights from Denver to San Diego 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 Denver Intl to San Diego are usually found in February or January, booked 83 days in advance, depart on a Thursday or Wednesday and return on a Friday
Cheap flight deals from Denver to San Diego
Cheapest
Best
Last-minute
One-way
Cheapest flights from Denver to San DiegoExplore the most affordable flight options available from Denver to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 6, 2026.
Explore the most affordable flight options available from Denver to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Thu 9/172:29 pm -
Nonstop2h 30m
Thu 9/247:04 pm -
1 stop13h 39m
Deal found 8/3![Frontier logo]()
$112
This Frontier deal was found by Cheapflights users on 8/4. 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.
Thu 9/2410:29 pm -
Nonstop2h 22m
Thu 10/14:54 pm -
Nonstop2h 28m
Deal found 8/4![Frontier logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Thu 9/102:29 pm -
Nonstop2h 30m
Mon 9/147:04 pm -
1 stop13h 39m
Deal found 8/3![Frontier logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 9/2910:47 pm -
1 stop15h 06m
Fri 10/24:54 pm -
Nonstop2h 28m
Deal found 8/3![Frontier logo]()
$115
This Cheapflightsfares deal was found by Cheapflights users on 8/4. 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 9/1010:29 pm -
Nonstop2h 22m
Sun 9/136:25 am -
Nonstop2h 34m
Deal found 8/4![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 8/257:40 am -
Nonstop2h 25m
Sun 8/306:25 am -
1 stop26h 09m
Deal found 8/3![Frontier logo]()
$117
This Frontier deal was found by Cheapflights users on 8/3. 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.
Thu 9/37:40 am -
Nonstop2h 25m
Fri 9/43:45 pm -
Nonstop2h 35m
Deal found 8/3![Frontier logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 8/2110:48 pm -
1 stop22h 27m
Thu 8/273:45 pm -
Nonstop2h 35m
Deal found 8/2![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Thu 8/2710:29 pm -
Nonstop2h 22m
Mon 8/318:59 pm -
1 stop5h 49m
Deal found 8/3![Frontier logo]()
$120
This Cheapflightsfares deal was found by Cheapflights users on 8/4. 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 9/110:29 pm -
Nonstop2h 22m
Tue 9/86:25 am -
Nonstop2h 38m
Deal found 8/4![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 9/110:29 pm -
Nonstop2h 22m
Sat 9/56:25 am -
1 stop14h 28m
Deal found 8/2![Frontier logo]()
$122
This Southwest deal was found by Cheapflights users on 8/2. 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 9/262:55 pm -
Nonstop2h 20m
Wed 9/308:30 am -
1 stop4h 30m
Deal found 8/2![Southwest logo]()
$123
Best flights from Denver to San DiegoDiscover carefully curated flight deals from Denver to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 6, 2026.
Discover carefully curated flight deals from Denver to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 6, 2026.
This United Airlines deal was found by Cheapflights users on 8/1. 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 10/207:43 am -
Nonstop2h 22m
Sat 10/243:56 pm -
1 stop6h 27m
Deal found 8/1![United Airlines logo]()
$123
This Alaska Airlines deal was found by Cheapflights users on 8/2. 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 10/46:59 pm -
Nonstop2h 35m
Sat 10/176:33 pm -
Nonstop2h 39m
Deal found 8/2![Alaska Airlines logo]()
$137
This Southwest deal was found by Cheapflights users on 8/2. 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 10/316:20 am -
1 stop6h 35m
Sat 11/710:00 am -
1 stop5h 35m
Deal found 8/2![Southwest logo]()
$137
This Southwest deal was found by Cheapflights users on 8/1. 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 10/237:35 am -
Nonstop2h 30m
Sun 10/256:15 am -
Nonstop2h 25m
Deal found 8/1![Southwest logo]()
$157
This United Airlines deal was found by Cheapflights users on 8/1. 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.
Mon 9/285:00 am -
1 stop6h 17m
Fri 10/23:56 pm -
1 stop6h 27m
Deal found 8/1![United Airlines logo]()
$272
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Wed 8/267:43 am -
Nonstop2h 22m
Sat 8/296:30 am -
Nonstop2h 36m
Deal found 8/5![United Airlines logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 8/4. 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.
Thu 10/1512:00 pm -
1 stop8h 43m
Mon 10/199:58 pm -
2 stops15h 34m
Deal found 8/4![Alaska Airlines logo]()
$374
This Alaska Airlines deal was found by Cheapflights users on 8/5. 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.
Wed 8/263:00 pm -
2 stops8h 59m
Thu 8/272:50 pm -
1 stop7h 26m
Deal found 8/5![Alaska Airlines logo]()
$403
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Wed 10/149:00 pm -
Nonstop2h 27m
Sun 10/185:00 pm -
1 stop4h 29m
Deal found 8/5![United Airlines logo]()
$377
This United Airlines deal was found by Cheapflights users on 8/1. 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 8/217:43 am -
Nonstop2h 22m
Mon 8/248:45 am -
Nonstop2h 32m
Deal found 8/1![United Airlines logo]()
$417
This United Airlines deal was found by Cheapflights users on 8/5. 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 8/149:00 pm -
Nonstop2h 27m
Sun 8/166:30 am -
Nonstop2h 36m
Deal found 8/5![United Airlines logo]()
$457
Last-minute flights from Denver to San DiegoDiscover last-minute flight deals from Denver to San Diego. Data last updated August 6, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to San Diego. Data last updated August 6, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 8/2110:48 pm -
1 stop22h 27m
Thu 8/273:45 pm -
Nonstop2h 35m
Deal found 8/2![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 8/257:40 am -
Nonstop2h 25m
Sun 8/306:25 am -
1 stop26h 09m
Deal found 8/3![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Thu 8/2710:29 pm -
Nonstop2h 22m
Mon 8/318:59 pm -
1 stop5h 49m
Deal found 8/3![Frontier logo]()
$120
This Cheapflightsfares deal was found by Cheapflights users on 8/4. 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 9/110:29 pm -
Nonstop2h 22m
Tue 9/86:25 am -
Nonstop2h 38m
Deal found 8/4![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 9/110:29 pm -
Nonstop2h 22m
Sat 9/56:25 am -
1 stop14h 28m
Deal found 8/2![Frontier logo]()
$122
This Frontier deal was found by Cheapflights users on 8/3. 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.
Thu 9/37:40 am -
Nonstop2h 25m
Fri 9/43:45 pm -
Nonstop2h 35m
Deal found 8/3![Frontier logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Thu 9/102:29 pm -
Nonstop2h 30m
Mon 9/147:04 pm -
1 stop13h 39m
Deal found 8/3![Frontier logo]()
$114
This Cheapflightsfares deal was found by Cheapflights users on 8/4. 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 9/1010:29 pm -
Nonstop2h 22m
Sun 9/136:25 am -
Nonstop2h 34m
Deal found 8/4![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Thu 9/172:29 pm -
Nonstop2h 30m
Thu 9/247:04 pm -
1 stop13h 39m
Deal found 8/3![Frontier logo]()
$112
This Frontier deal was found by Cheapflights users on 8/4. 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.
Thu 9/2410:29 pm -
Nonstop2h 22m
Thu 10/14:54 pm -
Nonstop2h 28m
Deal found 8/4![Frontier logo]()
$113
This Southwest deal was found by Cheapflights users on 8/2. 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 9/262:55 pm -
Nonstop2h 20m
Wed 9/308:30 am -
1 stop4h 30m
Deal found 8/2![Southwest logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 9/2910:47 pm -
1 stop15h 06m
Fri 10/24:54 pm -
Nonstop2h 28m
Deal found 8/3![Frontier logo]()
$115
One-way flights from Denver to San DiegoSearch for one-way flight options from Denver to San Diego. Find affordable one-way fares based on user searches. Data last updated August 6, 2026.
Search for one-way flight options from Denver to San Diego. Find affordable one-way fares based on user searches. Data last updated August 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 9/156:38 pm -
1 stop23h 21m
Deal found 8/5![Frontier logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 8/266:45 am -
1 stop14h 30m
Deal found 8/4![Frontier logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 8/296:45 am -
1 stop14h 30m
Deal found 8/4![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 8/4. 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.
Thu 8/276:10 am -
1 stop15h 04m
Deal found 8/4![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 8/2510:48 pm -
1 stop22h 27m
Deal found 8/2![Frontier logo]()
$88
This Southwest deal was found by Cheapflights users on 8/3. 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 9/212:05 pm -
Nonstop2h 25m
Deal found 8/3![Southwest logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 9/67:00 am -
2 stops17h 44m
Deal found 8/1![Frontier logo]()
$91
This Super.com deal was found by Cheapflights users on 8/3. 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 8/2010:29 pm -
Nonstop2h 22m
Deal found 8/3![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 10/410:47 pm -
1 stop11h 56m
Deal found 8/2![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 10/310:47 pm -
1 stop11h 56m
Deal found 8/3![Frontier logo]()
$98
This Delta deal was found by Cheapflights users on 8/4. 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 9/267:10 am -
1 stop6h 20m
Deal found 8/4![Delta logo]()
$99
This deal was found by Cheapflights users on 8/1. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/21:48 pm -
1 stop5h 31m
Deal found 8/1![Frontier logo]()
$101
Find flight deals from Denver to San Diego
Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to San Diego (SAN). 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 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $112 (Kiwi.com) |
One-way from | $84 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $210 |
Good round-trip deal | $174 or less |
Good one-way deal | $131 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Denver to San Diego 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 6, 2026.
Use the filters below to find and compare flights from Denver to San Diego that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Tue 10/20
7:43 am-9:05 am
Nonstop2h 22m
San Diego
Sat 10/24
3:56 pm-11:23 pm
1 stop6h 27m
$123
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Sun 10/4
6:59 pm-8:34 pm
Nonstop2h 35m
San Diego
Sat 10/17
6:33 pm-10:12 pm
Nonstop2h 39m
$137
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Sat 10/31
6:20 am-11:55 am
1 stop6h 35m
San Diego
Sat 11/7
10:00 am-4:35 pm
1 stop5h 35m
$137
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Fri 10/23
7:35 am-9:05 am
Nonstop2h 30m
San Diego
Sun 10/25
6:15 am-9:40 am
Nonstop2h 25m
$157
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Mon 9/28
5:00 am-10:17 am
1 stop6h 17m
San Diego
Fri 10/2
3:56 pm-11:23 pm
1 stop6h 27m
$272
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Wed 8/26
7:43 am-9:05 am
Nonstop2h 22m
San Diego
Sat 8/29
6:30 am-10:06 am
Nonstop2h 36m
$297
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Thu 10/15
12:00 pm-7:43 pm
1 stop8h 43m
San Diego
Mon 10/19
9:58 pm-2:32 pm
2 stops15h 34m
$374
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Wed 10/14
9:00 pm-10:27 pm
Nonstop2h 27m
San Diego
Sun 10/18
5:00 pm-10:29 pm
1 stop4h 29m
$377
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Wed 8/26
3:00 pm-10:59 pm
2 stops8h 59m
San Diego
Thu 8/27
2:50 pm-11:16 pm
1 stop7h 26m
$403
Quickest round-trip
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Fri 8/21
7:43 am-9:05 am
Nonstop2h 22m
San Diego
Mon 8/24
8:45 am-12:17 pm
Nonstop2h 32m
$417
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Denver to San Diego
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 Denver to San Diego 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 Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Denver-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-San Diego flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Denver-San Diego 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 Denver-San Diego 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 Denver to San Diego
Have a flexible travel schedule? Discover the best time to fly to San Diego from Denver with our price prediction graph.
DEN-SAN
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 Denver to San Diego
Prices
Airlines
Delays
How far ahead should I book a flight from Denver to San Diego?
Booking 82 days in advance of your planned departure date is, on average, the best time to get cheap flights from Denver to San Diego. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Denver to San Diego?
Currently, February is the cheapest month in which you can book a flight from Denver to San Diego (average of $119). Flying from Denver to San Diego in June is currently the most expensive (average of $267). 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 DEN to SAN?
Find hourly flight availability from Denver to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 6, 2026.
When flying from Denver to San Diego, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 30% versus a flight at noon.
What is the cheapest day to fly from Denver to San Diego?
Use this chart to determine the cheapest time to fly round-trip from Denver to San Diego. Price data was last updated on August 1, 2026.
Travelers seeking maximum savings on their Denver to San Diego flight should consider departing on Tuesday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from Denver to San Diego delayed?
About 20% of weekly flights between Denver and San Diego have experienced delays in the past year, with the average delay time being 130 minutes.
What is the most punctual flight time for Denver to San Diego flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Denver to San Diego flights?
Over the last year, Alaska Airlines have had the lowest number of delays on this route, with just 12% of flights being delayed.
The best insider tips for Denver to San Diego 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 Denver to San Diego trip
Our travel experts
Reviews of airlines servicing San Diego
Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated August 6, 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, andHawaiian Airlines from Denver to San Diego. 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.
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Related info for your journey
Find useful and relevant information for your journey from Denver to San Diego. 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 San Diego?
Book flights to San Diego if you plan to visit one of these locationsEl Cajon
National City
Chula Vista
Poway
La Mesa
Coronado
Santee
San Ysidro
Julian
Lemon Grove
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Denver and San Diego flights
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Top 5 airlines flying from Denver to San Diego
Discover the top 5 airlines that operate flights from Denver to San Diego. 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 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$47 | Average$150 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$68 | Average$184 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$115 | Average$263 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$116 | Average$227 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$117 | Average$249 | FlexibilityNo cancel fee | On-time63% |