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Denver (DEN) to San Diego (SAN) flight prices

A quick snapshot of Denver (DEN) to San Diego (SAN) fares — lowest and typical prices plus the cheapest months and weekdays to fly, the airlines on the route and the usual duration.

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Estimated median price for a one-way ticket

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Price graph and price trends for Denver International-San Diego International Airport
Weekly price trend
Today
2027
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Week
18
22
26
30
34
38
42
46
50
USD 23–67
USD 68–112
USD 113–156
USD 157–201
USD 202–247
Monthly price summary
March
AprilBest price
May
June
July
August
September
October
November
DecemberMost expensive
January

Ticket prices for Denver to San Diego (March 2026 - January 2027) are shown here with weekly or monthly averages to indicate cheaper and more expensive periods.

Source: Flightprices.com & Kayak.com
Forecast updated: March 22, 2026.
Flight information
DEN → SAN
Flight frequency
135 flights/week
Type
Direct flight
Duration
2 hours 25 minutes

Airlines with non-stop flights on this route:
Southwest logo Southwest United logo United Alaska Airlines logo Alaska Airlines Frontier logo Frontier
FAQ – Denver (DEN) → San Diego (SAN)

Yes — several low-cost airlines operate this route: Southwest and Frontier.

Based on recent price logs, the cheapest month(s) is June 2026. Use the monthly view above to spot the dip weeks.

Based on price logs for the next 12 months, the cheapest day(s) to depart is Tuesday. Compare weekdays in the fare calendar to target these departures.

Usually yes, but not always. Check both options — you can easily switch between them in our widget.

For domestic routes like DEN-SAN, good deals often appear a few weeks out. Watch for sales and avoid peak dates.
DEN–SAN
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Denver (DEN)
San Diego (SAN)
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