ONT to SLC, Ontario International Airport to Salt Lake City International Airport Cheap Flights

Based on HopeGoo data, Frontier Airlines offers one-way fares as low as US$56 on Cheapest nonstop routes (e.g. ONT to SLC on Thu, Apr 2), while Delta Air Lines offers Cheapest nonstop round-trips from US$226 departing on Fri, Feb 27 and returning on Sun, Mar 1.

By analyzing data from all airlines on the HopeGoo flight calendar, it looks like the best time to book a flight from Ontario to Salt Lake City 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 Ontario to Salt Lake City, 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 Thu, Apr 2, with one-way flights priced at just US$56. · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier 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 Salt Lake City travel is around December. · Get exclusive promo codes for HopeGoo app users.

The cheapest months to fly from Ontario to Salt Lake City is April, when demand for travel is lower.

After crunching the numbers on our February flight calendar, it's currently cheapest to fly from Ontario to Salt Lake City on February 28, 2026 with Frontier Airlines, with prices starting at US$98.

The time difference between Salt Lake City and Ontario is 1h.

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