Spirit airlines flights — Ontario, CA

Last updated: September 24, 2026

What affects the price

Flight prices shift based on how far in advance you book and the flexibility of your travel dates. If you are flying during major holidays or peak vacation weeks, you will see higher rates due to high demand. Choosing mid-week flights or opting for less popular departure times can help keep your budget in check. Cabin class, baggage requirements, and last-minute changes also play a significant role in the final total. Your exact pricing is confirmed free on the call.

About this service

Spirit Airlines operates as a low-cost carrier, which means their base fares are often lower than full-service airlines. However, you should factor in extra costs for bags, seat selection, and other services that aren't included in the base rate. We can help you compare these options to see if this airline is the right choice for your budget. Exact pricing confirmed free on the call.

Frequently asked in Ontario

Also serving nearby: Chino · Rancho Cucamonga · Jurupa Valley · Pomona · Fontana

All cities in California →

More on this: DOT Aviation Consumer Protection — refund rights and the 24-hour rule.

Service area details

Serving all of Ontario — population 182,457; about 3,650 residents per square mile across 50.0 sq mi. ZIP codes covered include 91758, 91761, 91762, 91764.

Neighborhoods served in Ontario: Central Park, Eastvale, The Shops at Ontario Center, Sierra Lakes, Bayside — and every surrounding area.