✈️ Flight Guide: Detroit (DTW) → Ontario (ONT)

Major events and festivals that impact economy fares from Ontario International Airport (ONT) include Anaheim/LA area conventions, Comic-Con (San Diego), Coachella and Stagecoach (near Palm Springs), Los Angeles county sporting events, and holiday-weekend conventions. Event-driven demand typically raises fares and hotel rates; book early or fly on non-event dates to secure the cheapest economy fares. CTA: Check event calendars and adjust travel dates to find the best economy prices out of Ontario International Airport (ONT).

The best time to fly from Ontario International Airport (ONT) for cheap economy fares is typically mid-January through early March and September through early November—these shoulder months offer the lowest average prices. Midweek departures (Tuesdays–Thursdays), early-morning flights and red-eyes tend to be cheaper. Avoid peak holiday windows like late June–August and mid-December to New Year for the highest fares. CTA: Use our fare calendar and alerts to pick the best time to fly economy from Ontario International Airport (ONT).

Direct (nonstop) flights from Ontario International Airport (ONT) reduce travel time and missed-connection risk, which is often worth a modest premium when time is valuable. Connecting flights can offer cheaper economy fares, especially on longer or international routes, but factor in potential layover delays and the need to re-clear security at some hubs. For cheapest economy travel, be flexible: a one-stop itinerary with a long layover can be inexpensive, but check total travel time and baggage transfer rules. CTA: Compare nonstop and connecting options from Ontario International Airport (ONT) to find the best economy value for your schedule.

Major carriers serving Ontario International Airport (ONT) include Southwest, Alaska Airlines, Delta, American, United, Volaris and Spirit. Southwest is often a strong economy-value choice for domestic travelers because of included two-checked-bag allowance on many fares; Volaris and Spirit can provide the lowest base fares to Mexico and nearby U.S. destinations but charge add-on fees for bags and seat selection. Compare total landed cost, flight times, and customer service reputations when choosing an airline. CTA: Compare carriers from Ontario International Airport (ONT) now to find the cheapest economy combination for your trip.

Spring (March–May): Book spring-break travel early and target mid-April for shoulder-season savings. Summer (June–August): Expect highest fares; plan far in advance and consider alternate airports to reduce costs. Fall (September–November): Often the best season for cheap economy fares—target September and early November. Winter (December–February): Post-holiday January is cost-effective; holiday windows in late December are expensive. Always check low-cost carriers and use carry-on only filters to keep economy fares low. CTA: Apply these seasonal tips when searching cheap economy flights from Ontario International Airport (ONT) to lower your total travel cost.

Typical nonstop flight times from Ontario International Airport (ONT) include: Las Vegas (LAS) ~1 hour, Phoenix (PHX) ~1 hour 20 minutes, San Diego (SAN) ~45 minutes, Denver (DEN) ~2 hours 20 minutes, Mexico City (MEX) ~3 hours 30 minutes (with seasonality). Low-cost carriers often schedule multiple daily flights on short-haul routes, while transcontinental and Mexico routes may be seasonal. CTA: Check live schedules and book economy seats early to secure the best times and fares.

To find cheap flights from Ontario International Airport (ONT) in economy class, combine flexible-date searches, fare alerts, and comparisons across nearby airports (LAX, SNA). Use multiple aggregators such as Google Flights, Skyscanner and Kayak and follow airlines’ social channels for flash sales. For international value, check low-cost carriers to Mexico and compare total trip costs including baggage and seat fees. CTA: Search cheap flights from Ontario International Airport (ONT) now to compare economy fares and set alerts for the best deals.