Flights from Denver to San Diego
North AmericaYear-round

Cheap Flights from Denver to San Diego

Track economy fares on the DEN → SAN route and get alerts when prices drop.

From
Denver
DEN
To
San Diego
SAN

Route Intelligence: Denver → San Diego

Flight Duration

2 hr 27 min (Direct)

Price Guidance

A good deal is under $250 roundtrip. Standard fare is $350–$500+.

Peak Season

Jun-Aug

Top Airlines

United Airlines, Southwest Airlines

Booking Tip

Book 1-3 months in advance for the best domestic fares.

Track Denver → San Diego Fares

Set your target price and FlightKitten will scan this route twice daily. The instant economy fares drop below your budget, you'll get an email with the price, airline, and a direct booking link.

Start Tracking — Free 7-Day Trial

Route Summary: Denver → San Diego

From
Denver (DEN)
To
San Diego (SAN)
Duration
2 hr 27 min (Direct)
Airlines
United Airlines, Southwest Airlines
Price Guide
A good deal is under $250 roundtrip. Standard fare is $350–$500+.
Tracking
FlightKitten scans 220+ airlines 2× daily
220+
Airlines Monitored
2×
Daily Scanning
AI
Deal Briefings
7-Day
Free Trial
Premium Cabin

Prefer business class on this route?

CEOFLIGHTSon board with your vision

Everyone deserves comfort at an affordable price. CEOFLIGHTS Personal Travel Managers find you the best business class fares and handle every detail of your journey.

Get a Free Quote
Also available: BestBusinessClass.com

Other Routes to San Diego

New York→San DiegoLos Angeles→San DiegoChicago→San DiegoMiami→San DiegoSan Francisco→San DiegoBoston→San Diego

More Destinations in North America

Anchorage
Anchorage
Atlanta
Atlanta
Austin
Austin
Boston
Boston
Charleston
Charleston
Charlotte
Charlotte

Route Briefing: Denver to San Diego

Trading mountain trails for Pacific surf takes 2 hours and 28 minutes across 853 miles. United Airlines and Southwest connect Denver directly with San Diego International Airport (SAN).

San Diego is celebrated for its year-round Mediterranean climate, world-famous beaches, and laid-back surf culture. Wander through the Spanish Renaissance buildings and lush gardens of Balboa Park, watch sea lions bask at La Jolla Cove, or stroll the boardwalk from Pacific Beach to Mission Beach. Savor fresh local fish tacos in Barrio Logan and dine on handmade pasta under patio lights in Little Italy.

Economy roundtrips under $130 represent fantastic value on this route, with standard fares averaging $190 to $290. Summer is peak season for beach lovers, though September and October offer warm ocean water and smaller crowds. Book 4 to 6 weeks ahead for the best savings.

How much are flights from Denver to San Diego in 2026?

Flight prices from Denver (DEN) to San Diego (SAN) vary significantly depending on the season, day of the week, and how far in advance you book. A good deal is under $250 roundtrip. Standard fare is $350–$500+. Popular carriers on this route include United Airlines, Southwest Airlines. FlightKitten eliminates the guesswork by monitoring 220+ airlines twice daily and alerting you the moment economy fares hit your target price.

How does FlightKitten track Denver to San Diego fares?

FlightKitten is an economy flight price monitoring platform that scans 220+ airlines twice every day for economy fares on the DEN to SAN route. When you set a target price, FlightKitten continuously monitors this route and sends an email alert the moment fares drop below your budget. Each alert includes the exact fare, airline, dates, and an AI-powered briefing that explains whether the deal is genuinely good compared to historical pricing on this route. No more obsessive price checking — set your budget and let FlightKitten do the watching. Learn more about how FlightKitten tracking works.

See our full San Diego destination guide for all available routes. Also popular: Denver to Anchorage.

Pro tip: Book 1-3 months in advance for the best domestic fares.

Looking for business class on this route? CEOFLIGHTS pairs you with a Personal Travel Manager who finds affordable business class fares and handles every detail of your journey. Alternatively, BestBusinessClass.com offers free expert quotes with real savings.