Hays to SanDiego Flights from US$135 incl. tax

Based on HopeGoo data, United Airlines offers one-way fares as low as US$216 on Cheapest nonstop routes (e.g. HYS to SAN on Wed, Apr 8), while United Airlines offers Cheapest nonstop round-trips from US$344 departing on Fri, Mar 6 and returning on Fri, Mar 13.

By analyzing data from all airlines on the HopeGoo flight calendar, it looks like the best time to book a flight from Hays 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 Hays 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 Wed, Apr 8, with one-way flights priced at just US$216. · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is United 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 October. · Get exclusive promo codes for HopeGoo app users.

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

After crunching the numbers on our March flight calendar, it's currently cheapest to fly from Hays to San Diego on March 6, 2026 with United Airlines, with prices starting at US$344.

The time difference between San Diego and Hays is 2h.

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