Dallas to Ontario Flights from HKD 27 incl. tax

Based on HopeGoo data, Frontier Airlines offers one-way fares as low as US$20 on Cheapest nonstop routes (e.g. DFW to ONT on Fri, Feb 27), while Delta Air Lines offers Cheapest nonstop round-trips from US$234 departing on Wed, Apr 1 and returning on Wed, Apr 8.

By analyzing data from all airlines on the HopeGoo flight calendar, it looks like the best time to book a flight from Dallas to Ontario 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 Dallas to Ontario, 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 Fri, Feb 27, with one-way flights priced at just US$20. · 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 Ontario travel is around April. · Get exclusive promo codes for HopeGoo app users.

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

After crunching the numbers on our February flight calendar, it's currently cheapest to fly from Dallas to Ontario on February 14, 2026 with Frontier Airlines, with prices starting at US$72.

The time difference between Ontario and Dallas is 2h.

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