Best Flights starting from $491
from$491economy
Champaign (CMI)
Wed, Mar 11
Roundtrip
Ontario (ONT)
Wed, Mar 25
Fields updated — click View Prices to search ↑
Other Destinations
Flights from Other Cities
San Antonio (SAT) to Ontario (ONT) in March from $164
From $164
Oklahoma City (OKC) to Ontario (ONT) in March from $208
From $208
Greenville (GSP) to Ontario (ONT) in March from $510
From $510
Nadi (NAN) to Ontario (ONT) in March from $1,763
From $1,763
San Francisco (SFO) to Ontario (ONT) in April from $133
From $133
Dallas (DFW) to Ontario (ONT) in April from $177
From $177
✈️ Flight Guide: Champaign (CMI) → Ontario (ONT)
Complete travel information for your March journey
Departing from Champaign (CMI) FAQs
Ontario International Airport (ONT) is served by a mix of legacy and low-cost carriers, including Southwest Airlines, American Airlines, Delta Air Lines, United Airlines, and Spirit Airlines. For the cheapest economy fares, low-cost carriers like Southwest and Spirit often have the best base fares, while legacy carriers can be competitive during sales; always compare total price including baggage and seat fees. Use fare-aggregators and sign up for fare alerts to catch the best deals from ONT to your destination.
During December holiday travel, allow at least 2.5 to 3 hours before departure for domestic flights out of Ontario International Airport (ONT) to account for parking, shuttle time, check-in, and TSA security lines. Parking fills quickly during peak dates—reserve airport parking in advance and consider online check-in and mobile boarding passes to save time. Arrive earlier if you need to drop bags or travel with oversized items to avoid stress.
Ontario International Airport (ONT) offers ride-shares, taxis, rental cars, airport shuttles, and regional bus connections to nearby major cities such as Los Angeles, Riverside, and San Bernardino. Rental car counters are on-site and off-site shuttles run frequently; public transit links exist but may require transfers. Book shuttles or rental cars in advance during high-demand months like March and July for better rates.
Yes, Ontario International Airport (ONT) commonly features direct flights to leisure hubs such as Las Vegas (McCarran/Las Vegas), Phoenix (Sky Harbor), and San Diego, especially in summer months like July when demand is high. Airlines often add frequency during peak travel months and weekends, so check schedules early and book 6–8 weeks ahead for the best economy fares. Use Google Flights or airline calendars to track added seasonal nonstop service from ONT.
Economy baggage allowances vary by airline departing Ontario International Airport (ONT); low-cost carriers may charge for both checked and carry-on bags while legacy carriers often include a personal item and allow carry-ons. To get the cheapest total price, compare the airline’s fare rules, buy bundles or fares that include baggage if you need it, and weigh luggage before arriving to avoid gate fees. Consider travel credit cards or loyalty programs that waive or reduce baggage fees for frequent flyers.
For January travel from Ontario International Airport (ONT), look for midweek departures, flexible date searches, and monitor price drops 3–8 weeks prior to departure, as January is typically a low-demand month with discounted fares. Set fare alerts on Google Flights, Skyscanner, or Kayak, and consider booking connecting flights or red-eye departures to reduce costs. Use airport and destination + month keywords (e.g., 'ONT cheapest January flights') when searching for optimized results.
Arriving at Ontario (ONT) FAQs
Economy Class - Cheapest Fare (ECO) typically refers to the most basic, lowest-priced economy ticket with the fewest included amenities—often a seat assignment fee, limited or no free checked baggage, and stricter change/cancellation rules. This fare is ideal for price-sensitive travelers who travel light and don't need flexibility. Always review the fare rules and total price, including baggage and seat-selection fees, before booking.
For September arrivals into Ontario International Airport (ONT), search flexible dates, set fare alerts, and book midweek evening or early-morning flights for the lowest prices. September is a shoulder season with reduced demand, so monitor flash sales and consider one-stop itineraries that may undercut nonstop prices. Use price-compare tools and sign up for airline newsletters to catch limited-time economy fares.
Cheapest economy fares usually do not include seat selection or priority boarding; these are often available as paid add-ons during booking or at check-in. If arriving at Ontario International Airport (ONT) and seat choice matters, purchase a bundled fare or add the options during booking to lock in seats and priority services. Compare the bundled fare price to add-on fees to determine the best value.
Travelers arriving on the cheapest economy fares bound for Ontario International Airport (ONT) commonly continue to nearby major destinations such as Los Angeles, San Diego, Riverside, San Bernardino, Las Vegas, and Phoenix. Budget travelers often use regional buses, shared shuttles, or rental cars to reach these hubs to save money. Plan ground transport in advance and compare shuttle vs ride-share costs for the best value.
Cheapest economy tickets are often non-refundable and may carry high change fees or only offer travel credit, especially for peak travel months like December. During busy holiday travel at Ontario International Airport (ONT), consider purchasing flexible fares or travel insurance if you need flexibility. Check the airline’s specific change and refund policy at booking to avoid unexpected charges.
To maximize arrival savings when booking the cheapest economy fare into Ontario International Airport (ONT), travel with a single personal item to avoid carry-on fees, prepay any required baggage online for lower rates, and compare public transit, shuttles, and ride-shares for the lowest transfer cost. Use loyalty programs or credit cards that include baggage waivers and book transfers in advance when possible. Always calculate the full door-to-door cost, not just the base airfare.
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Events & Festivals Near Ontario International Airport (ONT) — Travel Timing for Economy Flyers
Popular events that influence flight demand at Ontario International Airport (ONT) include Coachella (Indio, typically April), LA Marathon (March), San Diego Comic-Con (July), LA County Fair (September), and holiday periods (late November–December). These events often drive higher economy fares and limited availability on nearby routes; plan and book early for festival weekends. CTA: Check event calendars and secure flights early if your itinerary coincides with major regional festivals.
Best Time to Fly from Ontario International Airport (ONT) — Cheapest Economy Windows
The best times to find cheap economy flights from Ontario International Airport (ONT) are typically January, late August/September, and mid-November (excluding Thanksgiving). Midweek departures (Tuesday, Wednesday) and off-peak hours (early morning or late evening) often carry lower prices. Book domestic economy fares 1–3 months ahead and international itineraries 3–6 months ahead for optimal pricing. CTA: Use these timing strategies to schedule your ONT departure and set alerts for targeted months.
Direct vs Connecting Flights from Ontario International Airport (ONT) — Economy Decision Guide
Direct nonstop flights from Ontario International Airport (ONT) offer convenience and reduced travel time, often preferred by value-minded travelers when price differences are small. Connecting flights usually provide the cheapest economy fares for longer distances because they increase competition and routing flexibility. Consider total door-to-door time, connection risk, and baggage transfer policies when choosing economy connecting itineraries. CTA: Compare nonstop vs one-stop prices from ONT and weigh convenience against savings before booking.
Extra Tips
- If saving money is your priority, consider a single short connection through a large hub.
- For tight schedules or premium comfort, choose a nonstop from ONT when available.
- Ensure enough layover time to avoid missed connections when booking cheapest fares.
Airline Comparison for Ontario International Airport (ONT) — Cheap Economy Options
Key carriers at Ontario International Airport (ONT) include Southwest Airlines (strong low-cost point-to-point options), Spirit Airlines (ultra-low-cost base fares), American Airlines, Delta Air Lines, and United Airlines (broad networks and hub connections). Southwest often provides competitive total pricing due to inclusive policies (two free checked bags in many cases), while Spirit has the lowest base fares but many add-on fees. Compare total out-the-door cost—including checked bags, carry-ons, and seat fees—when choosing the cheapest economy carrier for your ONT itinerary. CTA: Use an airline comparison tool to compute total costs from ONT before purchasing.
Seasonal Travel Tips for Ontario International Airport (ONT) — Cheap Economy Traveler Checklist
Seasonal strategies can reduce costs and stress for economy travelers using Ontario International Airport (ONT). Winter (Dec–Jan): book early for holiday dates, reserve parking, and prepay baggage. Spring (Mar–May): monitor spring-break price swings and book 6–10 weeks ahead for peak dates. Summer (Jun–Aug): secure seats 2–3 months out and consider midweek travel to lower fares. Fall (Sep–Nov): target September and early November for shoulder-season savings and flexible date deals. CTA: Apply these seasonal tips when searching for the cheapest economy flights to or from ONT to maximize savings.
Flight Times & Schedules from Ontario International Airport (ONT) — Economy Traveler Guide
Typical nonstop flight durations from Ontario International Airport (ONT) include: LAS (Las Vegas) ~1 hour, PHX (Phoenix) ~1h 15m, SAN (San Diego) ~45–55 minutes, SFO (San Francisco) ~1h 25m, SEA (Seattle) ~2h 30m. Airlines often schedule early-morning and late-evening flights to maximize aircraft utilization; economy fares for red-eyes or off-peak times can be cheaper. For connections, common hubs include Denver (DEN), Dallas/Fort Worth (DFW), and Phoenix (PHX), which offer broad onward schedules. CTA: Check carrier schedules from ONT and compare flight duration vs price to find the best economy options.
How to Find Cheap Flights from Ontario International Airport (ONT) — Economy Strategies
To find the cheapest economy flights from Ontario International Airport (ONT), use flexible-date searches, set multiple fare alerts, and compare low-cost carriers against legacy airlines by total trip cost (fares + bags + seats). Consider nearby alternative airports and red-eye or midweek flights for lower prices. Use LSI keywords such as 'ONT flight deals', 'Ontario cheap airfare', and 'budget flights from ONT' when searching to optimize results on Google and Bing. CTA: Start a fare alert for your ONT itinerary today and compare prices across at least three booking platforms.
Tips
- Set alerts on multiple platforms and check daily for short flash sales from ONT.
- Search flexible dates (±3 days) and midweek departures for the lowest economy fares.
- Compare bundled fares vs. add-ons to determine the cheapest total price.