Cheap flights from Denver to San Diego
The cheapest round trip from Denver to San Diego that travelers found recently is $258 with a carry-on: a $148 fare on Frontier plus about $110 for a carry-on both ways. It leaves Fri, Oct 16 and comes back Mon, Oct 26.
Live prices for Fri, Oct 16 to Mon, Oct 26
Cheapest trips travelers found recently
| Leave | Return | Airline | Airports | Stops | Fare | Carry-on (est.) | Total | Live prices |
|---|---|---|---|---|---|---|---|---|
| Fri, Oct 16 | Mon, Oct 26 | Frontier | DEN → SAN | 1 stop | $148 | +$110 | $258 | Live price |
| Sat, Oct 17 | Sat, Oct 24 | Frontier | DEN → SAN | 1 stop | $156 | +$110 | $266 | Live price |
| Mon, Dec 21 | Sat, Dec 26 | Frontier | DEN → SAN | Nonstop | $164 | +$110 | $274 | Live price |
| Fri, Oct 16 | Tue, Oct 27 | Frontier | DEN → SAN | 1 stop | $172 | +$110 | $282 | Live price |
Round-trip prices per person, from real fares travelers found in the last few days. Carry-on fees are our estimate for each airline, both ways. Prices change fast: check the live price before you book.
Cheapest month to fly
| Month | Cheapest trip | From | Live prices |
|---|---|---|---|
| October 2026 | Fri, Oct 16 to Mon, Oct 26, 10 nights | $258 | Live price |
| December 2026 | Mon, Dec 21 to Sat, Dec 26, 5 nights | $274 | Live price |
Bag fees on this route
What the airlines flying Denver to San Diego usually charge for one bag each way. Budget airlines often sell the cheapest fares and charge the most for bags, so compare the total, not the fare.
| Airline | Carry-on, each way | Checked bag, each way |
|---|---|---|
| Frontier | $55 | $50 |
Our estimates: fees depend on the fare type and when you pay. Check the airline's own price when you book.
How these prices work
These are real round-trip fares that travelers found on Aviasales recently, not a live search, so they can change or sell out. Dipt adds an estimate of each airline's carry-on fee, so a cheap fare with expensive bags doesn't look cheaper than it is. "Live price" opens Dipt's live flight search for those dates, where you book with the airline or travel site you pick. Dipt may earn a commission when you book, at no extra cost to you (how Dipt makes money).
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