
Book Cheap United flight from Denver (DEN) to San Diego (SAN) from CA $243
Find The Best Day to Book a Cheap United Flights From Denver to San Diego
Cheapest United Flights from Denver (DEN) to San Diego (SAN)
The cheapest flights to San Diego Intl. found within the past 7 days were CA $320 round trip and CA $243 one way. Prices and availability subject to change. Additional terms may apply.
Frequently asked questions
Grab a great United flight from DEN to SAN
To find a great deal on United flights with Travelocity, simply enter your origin and destination airports, pick your travel dates, and hit search. From here, you can sort by price, flight duration, and arrival/departure time. You can also filter to find nonstop flights.
Flying United Denver to San Diego gives you fights to choose from. With that direct flight time of , you’ll be touching down before you know it.
Find cheap flights with United between Denver and San Diego
United has a range of great fares on stacks of flights, and to find the most affordable for you, there are a few tricks you can try. Booking in advance, for example, is a great way to grab a fantastic deal. Also, choose the cheapest month, if you can. One-way flights from Denver to San Diego with United are April.
The more flexible you are, the more affordable flights you’re likely to find. Consider one-way flights and connecting flights, as well as standard roundtrip and direct options. Even if you’re flying today, cheap last-minute flights are easy to find by entering your travel dates and hitting search.
Reasons to book your United flights with Travelocity
Travelocity makes it easy to book a seat, anywhere in the world. The vast inventory, fast search, and advanced filters put some of the best deals on the planet in one place. Whether you’re traveling on business, with friends, family, or on your own, take your pick from some fantastic options. And with free cancellation and pay later options, you can travel more and worry less.
Airport code | Country | Airport name | Number of flights |
|---|---|---|---|
| ORD | USA | O'Hare Intl. | 227 |
| DEN | USA | Denver Intl. | 226 |
| IAH | USA | George Bush Intercontinental | 136 |
| IAD | USA | Washington Dulles Intl. | 100 |
| SFO | USA | San Francisco Intl. | 64 |
| LAX | USA | Los Angeles Intl. | 23 |
| EWR | USA | Liberty Intl. | 20 |
| FRA | DEU | Frankfurt Intl. | 19 |
| NRT | JPN | Narita Intl. | 19 |
| PEK | CHN | Capital Intl. | 16 |
Travelers ❤️ these 🏨 after their flight to San Diego

Sheraton San Diego Resort
Great rooms and staff
Reviewed on Mar 12, 2026

The DEXTRO Little Italy, BW Premier Collection
The hotel was very clean. Staff were excellent. Rooms comfortable and contained everything needed. Little Italy was walkable . The only complaint was room layout gusting could have been brighter. The breakfast selection was also good and reasonably priced.
Reviewed on Mar 13, 2026

Wyndham San Diego Bayside
Room was dirty and AC was broken. They gave us a new room after we spoke with them. Then we went to open the door to the new room and heard people talking as I grabbed the door handle, two men walked out. I complained to the manager and he started arguing with me. This place has really gone down ...
Reviewed on Mar 12, 2026
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