Flights from Denver to San Diego
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From $254 · Prices update daily
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The quick answer
Flights from Denver to San Diego start around $254 round-trip. Airlines on this route include: Alaska Airlines, United Airlines, Frontier Airlines (direct flights available). Cheapest month: July; peak: June (about +9%).
Price calendar — next 60 days
★ Cheapest: $254 on Fri, Jul 3 · Direct · UA
Lowest return fares · Prices update daily · Final price confirmed at booking
Price calendar — Denver to San Diego
Month-by-month lowest fares. Green = cheapest dates.
United States essentials
🇺🇸 Domestic flight — no passport required
Domestic flight — no passport required for US citizens. Bring REAL ID for security.
Full San Diego visa guide →🆘 Emergency
911
💱 Currency
US Dollar ($)
🕐 Time zone
UTC−5 to −10
🗣️ Language
English
🔌 Plugs
Type A/B · 120V
🚗 Driving
Right side
💡 Tipping
Expected — 15–20% at restaurants
📞 Dial code
+1
Entry rules can change — always confirm with official sources before booking.
Stay connected in San Diego
Skip roaming fees — get a local eSIM before you land. Works in 200+ countries and activates instantly, so you’re online the moment you touch down.
Travel insurance
Protect your Denver to San Diego trip against delays, cancellations, and medical emergencies. US travelers can compare plans from top insurers.
Airport transfer in San Diego
Pre-book your ride into San Diego. Fixed price, meet & greet, and a driver waiting at arrivals — no meter anxiety after a long flight.
Flight delayed or cancelled?
If your Denver to San Diego flight was delayed more than 3 hours or cancelled, you may be entitled to up to €600 in compensation under EU/UK rules — even if you flew a non-EU airline. Free to check, no win no fee.
More resources
Denver to San Diego — frequently asked
How much is a flight from Denver to San Diego?+
Fares start around $254 round-trip, ranging up to about $374 in peak periods. Prices update daily across 800+ airlines.
What is the cheapest month to fly Denver to San Diego?+
July typically has the lowest fares, while June is the most expensive (around +9%).
Are there direct flights from Denver to San Diego?+
Yes — direct flights are available on this route. Connecting itineraries are often cheaper.
Which airlines fly from Denver to San Diego?+
Carriers on this route include Alaska Airlines, United Airlines, Frontier Airlines. Compare them side by side in the search above.
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