ASE to SAN, Aspen/Pitkin County Airport to San Diego International Airport Cheap Flights

Based on HopeGoo data, American Airlines offers one-way fares as low as US$189 on Cheapest nonstop routes (e.g. ASE to SAN on Tue, Mar 31), while American Airlines offers Cheapest nonstop round-trips from US$271 departing on Sat, Mar 14 and returning on Tue, Mar 17.

By analyzing data from all airlines on the HopeGoo flight calendar, it looks like the best time to book a flight from Aspen to San Diego is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

To find best deals on flights from Aspen to San Diego, you can use various tools on HopeGoo: · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Mar 31, with one-way flights priced at just US$189. · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is American Airlines. · Set up price alerts to easily monitor ticket prices without having to check every day. · Check HopeGoo flight deals and promo codes frequently. · Avoid peak season unless you book very early. It seems the peak season for San Diego travel is around August. · Get exclusive promo codes for HopeGoo app users.

The cheapest months to fly from Aspen to San Diego is October, when demand for travel is lower.

After crunching the numbers on our March flight calendar, it's currently cheapest to fly from Aspen to San Diego on March 14, 2026 with American Airlines, with prices starting at US$271.

The time difference between San Diego and Aspen is 1h.

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