$54+ Cheap flights from Colorado to San Diego (SAN)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SAN
Oct 9 — Oct 161
Round-trip
1 adult, Economy
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Find cheap flights from Colorado 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
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Colorado to San Diego
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Cheapest flights from Colorado to San DiegoExplore the most affordable flight options available from Colorado to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 9, 2026.
Explore the most affordable flight options available from Colorado to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 9, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 9/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/202:29 pm -
Nonstop2h 29m
Sat 10/316:25 am -
Nonstop2h 34m
Deal found 9/5![Frontier logo]()
$106
This Super.com deal was found by Cheapflights users on 9/6. 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.
Sat 10/1710:29 pm -
Nonstop2h 27m
Tue 10/204:53 pm -
Nonstop2h 31m
Deal found 9/6![Frontier logo]()
$107
This Priceline deal was found by Cheapflights users on 9/7. 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.
Mon 11/92:38 pm -
Nonstop2h 30m
Thu 11/124:53 pm -
Nonstop2h 32m
Deal found 9/7![Frontier logo]()
$108
This deal was found by Cheapflights users on 9/4. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/197:00 am -
1 stop4h 11m
Sun 11/296:30 am -
Nonstop2h 34m
Deal found 9/4![Frontier logo]()
$109
This FlightHub deal was found by Cheapflights users on 9/8. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/282:28 pm -
Nonstop2h 30m
Sat 10/316:25 am -
Nonstop2h 34m
Deal found 9/8![Frontier logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 10/2110:29 pm -
Nonstop2h 27m
Wed 10/284:53 pm -
Nonstop2h 32m
Deal found 9/7![Frontier logo]()
$114
This Cheapflightsfares deal was found by Cheapflights users on 9/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/202:29 pm -
Nonstop2h 29m
Sat 10/242:01 pm -
1 stop8h 42m
Deal found 9/5![Frontier logo]()
$115
This Cheapflightsfares deal was found by Cheapflights users on 9/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1010:29 pm -
Nonstop2h 27m
Tue 10/136:25 am -
Nonstop2h 33m
Deal found 9/5![Frontier logo]()
$116
This eDestinos deal was found by Cheapflights users on 9/8. 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 9/292:29 pm -
Nonstop2h 30m
Tue 9/295:54 pm -
1 stop23h 39m
Deal found 9/8![Frontier logo]()
$117
This Frontier deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:29 pm -
Nonstop2h 28m
Wed 11/116:25 am -
Nonstop2h 34m
Deal found 9/9![Frontier logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 10/202:29 pm -
Nonstop2h 29m
Tue 10/276:25 am -
Nonstop2h 34m
Deal found 9/8![Frontier logo]()
$119
This Southwest deal was found by Cheapflights users on 9/7. 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 11/510:05 am -
Nonstop2h 20m
Thu 11/124:40 pm -
Nonstop2h 20m
Deal found 9/7![Southwest logo]()
$157
Best flights from Colorado to San DiegoDiscover carefully curated flight deals from Colorado to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 9, 2026.
Discover carefully curated flight deals from Colorado to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 9, 2026.
This Southwest deal was found by Cheapflights users on 9/8. 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 11/76:00 am -
1 stop5h 30m
Mon 11/97:00 pm -
1 stop3h 45m
Deal found 9/8![Southwest logo]()
$177
This Delta deal was found by Cheapflights users on 9/8. 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 2/205:55 pm -
1 stop5h 07m
Sat 2/279:45 am -
1 stop6h 29m
Deal found 9/8![Delta logo]()
$197
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Sun 2/146:35 pm -
1 stop4h 53m
Thu 2/182:30 pm -
2 stops5h 26m
Deal found 9/8![United Airlines logo]()
$242
This American Airlines deal was found by Cheapflights users on 9/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:00 am -
1 stop4h 07m
Wed 10/216:15 am -
1 stop3h 59m
Deal found 9/5![American Airlines logo]()
$282
This Alaska Airlines deal was found by Cheapflights users on 9/7. 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 10/147:07 am -
2 stops11h 03m
Sun 10/186:15 am -
1 stop15h 22m
Deal found 9/7![Alaska Airlines logo]()
$336
This Delta deal was found by Cheapflights users on 9/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:10 pm -
1 stop4h 33m
Tue 10/135:01 pm -
1 stop4h 39m
Deal found 9/5![Delta logo]()
$237
This United Airlines deal was found by Cheapflights users on 9/8. 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 11/237:55 am -
1 stop4h 36m
Fri 11/272:30 pm -
1 stop4h 14m
Deal found 9/8![United Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:10 pm -
1 stop4h 05m
Mon 10/194:20 pm -
Nonstop2h 10m
Deal found 9/7![Southwest logo]()
$287
This United Airlines deal was found by Cheapflights users on 9/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/56:25 pm -
1 stop5h 05m
Thu 11/124:18 pm -
1 stop4h 45m
Deal found 9/4![United Airlines logo]()
$277
This American Airlines deal was found by Cheapflights users on 9/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:03 am -
1 stop3h 53m
Mon 9/284:14 pm -
1 stop5h 08m
Deal found 9/5![American Airlines logo]()
$323
This Southwest deal was found by Cheapflights users on 9/8. 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 2/206:35 am -
2 stops7h 00m
Sat 2/277:10 am -
2 stops7h 05m
Deal found 9/8![Southwest logo]()
$297
This Delta deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:15 pm -
1 stop6h 14m
Wed 10/286:15 am -
1 stop5h 15m
Deal found 9/7![Delta logo]()
$302
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/293:40 pm -
Nonstop2h 25m
Sun 10/47:00 am -
Nonstop2h 33m
Deal found 9/8![United Airlines logo]()
$282
This Southwest deal was found by Cheapflights users on 9/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/510:05 am -
Nonstop2h 20m
Thu 11/122:40 pm -
1 stop6h 05m
Deal found 9/4![Southwest logo]()
$297
This Delta deal was found by Cheapflights users on 9/7. 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 10/211:15 pm -
2 stops10h 36m
Thu 10/296:15 am -
1 stop5h 15m
Deal found 9/7![Delta logo]()
$307
This American Airlines deal was found by Cheapflights users on 9/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/176:03 am -
1 stop3h 53m
Sun 9/206:20 am -
1 stop3h 36m
Deal found 9/6![American Airlines logo]()
$368
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:00 am -
2 stops6h 35m
Wed 10/72:24 pm -
2 stops8h 35m
Deal found 9/9![United Airlines logo]()
$311
This Southwest deal was found by Cheapflights users on 9/6. 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 10/232:05 pm -
1 stop10h 45m
Sun 10/257:00 pm -
1 stop4h 35m
Deal found 9/6![Southwest logo]()
$317
This Delta deal was found by Cheapflights users on 9/7. 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 10/231:15 pm -
2 stops10h 40m
Fri 10/306:15 am -
1 stop5h 15m
Deal found 9/7![Delta logo]()
$344
This United Airlines deal was found by Cheapflights users on 9/6. 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 10/26:00 pm -
1 stop5h 27m
Wed 10/74:11 pm -
1 stop5h 04m
Deal found 9/6![United Airlines logo]()
$315
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:15 pm -
2 stops6h 59m
Thu 10/296:15 am -
1 stop5h 15m
Deal found 9/8![Delta logo]()
$344
This United Airlines deal was found by Cheapflights users on 9/8. 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 10/26:00 pm -
1 stop5h 27m
Mon 10/57:00 am -
1 stop4h 33m
Deal found 9/8![United Airlines logo]()
$325
This Southwest deal was found by Cheapflights users on 9/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/58:25 am -
2 stops8h 20m
Tue 11/1012:45 pm -
2 stops6h 05m
Deal found 9/4![Southwest logo]()
$391
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Sat 12/51:29 pm -
1 stop4h 41m
Wed 12/96:45 am -
1 stop4h 37m
Deal found 9/8![United Airlines logo]()
$325
This Delta deal was found by Cheapflights users on 9/7. 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 10/1412:02 pm -
1 stop4h 08m
Mon 10/193:00 pm -
1 stop4h 14m
Deal found 9/7![Delta logo]()
$389
This Southwest deal was found by Cheapflights users on 9/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:50 am -
2 stops5h 10m
Sun 12/612:15 pm -
1 stop3h 50m
Deal found 9/4![Southwest logo]()
$394
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Sat 10/31:37 pm -
2 stops7h 31m
Wed 10/72:24 pm -
2 stops6h 51m
Deal found 9/6![United Airlines logo]()
$326
This United Airlines deal was found by Cheapflights users on 9/7. 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 11/206:00 am -
1 stop5h 12m
Sun 11/299:10 pm -
Nonstop2h 28m
Deal found 9/7![United Airlines logo]()
$327
This United Airlines deal was found by Cheapflights users on 9/7. 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 10/301:40 pm -
1 stop4h 35m
Mon 11/212:39 pm -
1 stop6h 51m
Deal found 9/7![United Airlines logo]()
$329
This Southwest deal was found by Cheapflights users on 9/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/144:10 pm -
Nonstop2h 25m
Fri 9/189:35 am -
1 stop3h 55m
Deal found 9/4![Southwest logo]()
$498
Last-minute flights from Colorado to San DiegoDiscover last-minute flight deals from Colorado to San Diego. Data last updated September 9, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to San Diego. Data last updated September 9, 2026 and is based on user searches.
This eDestinos deal was found by Cheapflights users on 9/8. 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 9/292:29 pm -
Nonstop2h 30m
Tue 9/295:54 pm -
1 stop23h 39m
Deal found 9/8![Frontier logo]()
$117
This Southwest deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/58:55 pm -
1 stop4h 20m
Thu 10/84:20 pm -
Nonstop2h 10m
Deal found 9/7![Southwest logo]()
$167
This Cheapflightsfares deal was found by Cheapflights users on 9/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1010:29 pm -
Nonstop2h 27m
Tue 10/136:25 am -
Nonstop2h 33m
Deal found 9/5![Frontier logo]()
$116
This Cheapflightsfares deal was found by Cheapflights users on 9/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:29 pm -
Nonstop2h 27m
Mon 10/196:25 am -
Nonstop2h 33m
Deal found 9/5![Frontier logo]()
$121
This Super.com deal was found by Cheapflights users on 9/6. 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.
Sat 10/1710:29 pm -
Nonstop2h 27m
Tue 10/204:53 pm -
Nonstop2h 31m
Deal found 9/6![Frontier logo]()
$107
This Cheapflightsfares deal was found by Cheapflights users on 9/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/202:29 pm -
Nonstop2h 29m
Sat 10/316:25 am -
Nonstop2h 34m
Deal found 9/5![Frontier logo]()
$106
This Cheapflightsfares deal was found by Cheapflights users on 9/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/202:29 pm -
Nonstop2h 29m
Sat 10/242:01 pm -
1 stop8h 42m
Deal found 9/5![Frontier logo]()
$115
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 10/202:29 pm -
Nonstop2h 29m
Tue 10/276:25 am -
Nonstop2h 34m
Deal found 9/8![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 10/2110:29 pm -
Nonstop2h 27m
Wed 10/284:53 pm -
Nonstop2h 32m
Deal found 9/7![Frontier logo]()
$114
This Super.com deal was found by Cheapflights users on 9/4. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/212:29 pm -
Nonstop2h 29m
Mon 10/264:53 pm -
Nonstop2h 31m
Deal found 9/4![Frontier logo]()
$122
This Southwest deal was found by Cheapflights users on 9/8. 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 10/216:30 am -
2 stops6h 50m
Mon 10/264:20 pm -
Nonstop2h 10m
Deal found 9/8![Southwest logo]()
$172
This FlightHub deal was found by Cheapflights users on 9/8. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/282:28 pm -
Nonstop2h 30m
Sat 10/316:25 am -
Nonstop2h 34m
Deal found 9/8![Frontier logo]()
$111
One-way flights from Colorado to San DiegoSearch for one-way flight options from Colorado to San Diego. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
Search for one-way flight options from Colorado to San Diego. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 9/8. 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 10/1310:29 pm -
Nonstop2h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$54
This Super.com deal was found by Cheapflights users on 9/4. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:00 am -
1 stop6h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$62
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 11/410:29 pm -
Nonstop2h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$63
This Frontier deal was found by Cheapflights users on 9/5. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:29 pm -
Nonstop2h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$64
This Super.com deal was found by Cheapflights users on 9/8. 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 10/267:12 am -
1 stop8h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$67
This Super.com deal was found by Cheapflights users on 9/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1910:29 pm -
Nonstop2h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$69
This Booking.com deal was found by Cheapflights users on 9/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1610:29 pm -
Nonstop2h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$70
This FlightHub deal was found by Cheapflights users on 9/8. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:12 am -
1 stop8h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$71
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 10/610:29 pm -
Nonstop2h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$73
This Frontier deal was found by Cheapflights users on 9/5. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/510:29 pm -
Nonstop2h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$74
This Southwest deal was found by Cheapflights users on 9/8. 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 10/75:45 pm -
1 stop4h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Southwest logo]()
$89
This Southwest deal was found by Cheapflights users on 9/8. 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 10/216:30 am -
2 stops6h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Southwest logo]()
$94
Find flight deals from Colorado to San Diego
Keep the following information in mind while searching for Colorado to San Diego flight deals. Data was last updated September 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $106 (Cheapflightsfares) |
One-way from | $54 (Cheapflightsfares) |
Popular in | June |
Cheapest in | February |
Average price | $209 |
Good round-trip deal | $166 or less |
Good one-way deal | $141 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Colorado 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 7,457,451 searches. Data last updated September 9, 2026.
Use the filters below to find and compare flights from Colorado 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 11/24
10:29 pm-11:57 pm
Nonstop2h 28m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$98
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Wed 10/7
6:59 pm-8:34 pm
Nonstop2h 35m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$99
Colorado SpringsSan Diego
COS Colorado Springs - SAN San Diego
COSSAN
Colorado Springs
Wed 11/4
6:07 pm-10:40 pm
1 stop5h 33m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$99
Quickest round-trip
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Sat 11/7
4:30 pm-5:50 pm
Nonstop2h 20m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$109
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Wed 11/4
6:45 pm-10:43 pm
1 stop4h 58m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$109
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Thu 10/8
6:00 am-11:35 am
1 stop6h 35m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$119
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Fri 10/30
7:25 pm-11:42 pm
1 stop5h 17m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$119
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Sat 11/7
6:00 pm-10:40 pm
1 stop5h 40m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$119
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Wed 10/7
5:25 am-8:47 am
1 stop4h 22m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$119
DenverSan Diego
DEN Denver Intl - SAN San Diego
DENSAN
Denver Intl
Fri 10/2
6:28 pm-10:09 am
1 stop16h 41m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$127
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Colorado to San Diego
Have a flexible travel schedule? Discover the best time to fly to San Diego from Colorado with our price prediction graph.
DEN-SAN
COS-SAN
DRO-SAN
GJT-SAN
EGE-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 Colorado to San Diego
USCO-SAN
DEN-SAN
COS-SAN
DRO-SAN
GJT-SAN
What is the cheapest month to book a flight from Colorado to San Diego?
Currently, February is the cheapest month in which you can book a flight from Colorado to San Diego (average of $149). Flying from Colorado to San Diego in June is currently the most expensive (average of $284). 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 CO to SAN?
Find hourly flight availability from Colorado 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 September 9, 2026.
It’s optimal to fly from Colorado to San Diego in the evening. By choosing this option you can save up to 58% on the cost of your flight, compared to a flight at noon.
Weekly flight availability from Colorado to San Diego
Explore weekly flight availability from Colorado to San Diego. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 9, 2026.
The most flights from USCO to SAN are scheduled on a Tuesday (26 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (8 on average).
How much does it cost to fly round-trip from Colorado to San Diego?
Airfare is below average for this route at the moment.
Colorado to San Diego flights typically cost between $141 and $292 in October.The cheapest round-trip price found within the last 5 days was $106 on Frontier (Oct 20-Oct 24).
How far ahead should I book a flight from Colorado to San Diego?
To ensure you get the cheapest price possible for a flight from Colorado to San Diego, you should look to book at least 87 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest day to fly from Colorado to San Diego?
Use this chart to determine the cheapest time to fly round-trip from Colorado to San Diego. Price data was last updated on September 5, 2026.
Travelers seeking maximum savings on their Colorado 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.
Related info for your journey
Find useful and relevant information for your journey from Colorado 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
Coronado
Poway
San Ysidro
La Mesa
Santee
Julian
Lemon Grove
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Colorado to San Diego
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Complete your trip
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Search flights from Colorado to San Diego by cabin class
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Colorado and San Diego flights
Browse other Colorado and San Diego flight options. Last updated on September 9, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to San Diego
Explore flights to San Diego departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 9, 2026.
Colorado to San Diego flights
Consider these flights traveling from Colorado to San Diego.
Top 8 airlines flying from Colorado to San Diego
Discover the top 8 airlines that operate flights from Colorado 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 7,457,451 searches. Data last updated September 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$48 | Average$149 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$80 | Average$135 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$114 | Average$197 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$116 | Average$279 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$117 | Average$300 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$117 | Average$353 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$211 | Average$271 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$228 | Average$361 | FlexibilityNo cancel fee | On-time71% |