✈️ Flight Guide: Denver (Any) → Ontario (ONT)

October features a variety of events near Ontario International Airport (ONT) and accessible from DENA (All Airports), including fall fairs, college football games, Halloween festivals, and cultural events in Los Angeles, Anaheim, and Riverside. Notable activities include theme-park Halloween events at Disneyland and Knott’s Scary Farm, local harvest festivals, and regional music or food festivals across the Inland Empire. These events can increase demand for flights and ground transportation, so book early and plan for earlier arrivals at the airport on event weekends.

The best times to fly from DENA (All Airports) to ONT are typically mid-week and during off-peak morning or late-evening flights in October. For the best fares, book 3–8 weeks ahead for domestic travel in the fall; last-minute deals are less common during October events. Avoid peak holiday weekends and local event dates tied to universities and festivals in the Inland Empire to minimize crowds and higher fares. If flexibility is an option, use 'flexible dates' search and consider adjacent airports to expand your options.

Choosing between direct and connecting flights depends on priorities: speed versus price. Direct flights from DENA (All Airports) to Ontario International Airport (ONT), when available in October, minimize travel time and reduce the risk of missed connections but may cost more. Connecting itineraries often lower the fare and increase schedule options, especially via major hubs like Los Angeles (LAX) or Phoenix (PHX), but add layover time and potential delay exposure. For October travel with luggage or tight schedules, prioritize nonstop or single-connection routes; for maximum savings, compare multiple-connection options and factor in layover comfort.

Compare airlines by price, baggage policy, change/cancellation fees, and on-time performance for the DENA (All Airports) to ONT route in October. Low-cost carriers often offer lower base fares but charge for checked bags, seat selection, and extras; legacy carriers include more amenities but can be pricier. For October travel, consider loyalty program benefits and flexible tickets if your plans might change; check recent on-time records for carriers serving the region and read passenger reviews for check-in and baggage handling. Use direct carrier booking to ensure smoother customer service if changes arise.

Seasonal travel tips for October travel from DENA (All Airports) to ONT include packing layers for variable fall weather, booking mid-week flights for lower fares, and pre-booking parking and rental cars to avoid shortages during event weekends. Check airline change and cancellation policies as October can have localized disruptions from weather or event-driven traffic, and leave extra time for transfers to surrounding cities like Los Angeles, Anaheim, and Riverside. Use mobile boarding passes, enroll in trusted traveler programs if available, and confirm baggage rules before departure to streamline your October trip.

Typical flight times between DENA (All Airports) and Ontario International Airport (ONT) depend on the specific departure airport and routing. Nonstop itineraries, when available, can range from 1 to 3 hours for regional hops; most routes with a connection average 3–6 hours total travel time including layovers. In October, airlines often publish adjusted fall schedules — check carrier timetables for exact departure windows and early morning or late-evening flights to find the best balance between speed and price. Use airline apps for real-time schedule updates, especially during seasonal timetable changes.

Finding cheap flights from DENA (All Airports) to Ontario International Airport (ONT) in October requires a mix of timing and strategy. Use fare comparison tools, set price alerts, and search flexible dates — Tuesdays and Wednesdays often show lower fares. Consider alternative nearby departure airports within the Dena area and compare connecting itineraries via major hubs to unlock lower prices. Also look for promotional codes from carriers, book baggage in advance to avoid steep gate fees, and join airline newsletters for flash sales that commonly appear leading into October.