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

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Airlines with non-stop flights on this route:

Southwest United Alaska Airlines Frontier

FAQ – Denver (DEN) → San Diego (SAN)

Are there any low-cost airlines with flights from Denver (DEN) to San Diego (SAN)?

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

Which is the cheapest month to fly between Denver International and San Diego International Airport?

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

What day of the week is usually cheapest on this route?

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.

Is roundtrip cheaper than two one-way tickets for DEN-SAN?

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

How far in advance should I book to get the best price?

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

Latest price searches

DEN → SAN

• 
  Alaska Airlines · Round trip 257 USD

  Departure 2026-10-29 · Return 2026-11-05 · 7 days

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Denver (DEN)

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San Diego (SAN)

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Children (3–11)

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Youth (12–17)

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Infants (0–2)

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Class

Economy Premium Business First

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