Best Flights starting from $56
from$56economy
Las Vegas (LAS)
Sat, May 2
Roundtrip
Ontario (ONT)
Sat, May 2
from$128economy
Las Vegas (LAS)
Fri, May 1
Roundtrip
Ontario (ONT)
Fri, May 1
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Other Destinations
Las Vegas (LAS) to Salt Lake City (SLC) in May from $30
From $30
Las Vegas (LAS) to Chicago (ORD) in May from $81
From $81
Las Vegas (LAS) to Oakland (OAK) in May from $86
From $86
Las Vegas (LAS) to San Antonio (SAT) in May from $111
From $111
Las Vegas (LAS) to Portland (PDX) in May from $128
From $128
Las Vegas (LAS) to Orlando (MCO) in May from $129
From $129
Flights from Other Cities
Denver (Any) to Ontario (ONT) in May from $80
From $80
Omaha (OMA) to Ontario (ONT) in May from $80
From $80
Grand Rapids (GRR) to Ontario (ONT) in May from $86
From $86
Dallas (DFW) to Ontario (ONT) in May from $160
From $160
Dallas (Any) to Ontario (ONT) in May from $160
From $160
Kansas City (MCI) to Ontario (ONT) in May from $160
From $160
✈️ Flight Guide: Las Vegas (LAS) → Ontario (ONT)
Complete travel information for your May journey
Departing from Las Vegas (LAS) FAQs
For domestic economy departures from Ontario International Airport (ONT), arrive at least 90 minutes before departure for weekend or holiday peak travel, and 60 minutes for off-peak times. Allow extra time during April and November holidays when security lines are longer; if traveling with checked bags, add an extra 20–30 minutes.
Historically, the cheapest months to fly economy from Ontario International Airport (ONT) are January, February and September when demand dips after holidays and before fall travel ramps up. For the best deals, search and book 6–10 weeks in advance and monitor fare alerts in April 2026 for spring sales.
Popular ground options to Ontario International Airport (ONT) include rideshare (Uber/Lyft), airport shuttles, Metrolink + shuttle connections, and car rentals. For cheaper travel, consider Metrolink trains to the Inland Empire/ONT station plus a short shuttle; this is especially cost-effective during major events in March and October.
Southwest, Spirit and Frontier often show the lowest base economy fares from Ontario International Airport (ONT), while Alaska, Delta and American may offer competitive fares with more amenities. Compare basic economy vs regular economy and factor in baggage fees before booking to get the true lowest price.
Yes. Seasonal routes to leisure destinations like Las Vegas, Phoenix, and seasonal nonstop service to select Hawaiian islands often increase in summer and winter holiday windows, which can raise prices. Watch for increased seat sales in late April and early November for off-peak deals.
Yes. Ontario International Airport (ONT) provides economy and long-term parking options that are cheaper when reserved online in advance. For longer trips, book monthly or long-term lots and compare off-airport park-and-ride shuttles, especially during summer festivals when on-site lots fill quickly.
Arriving at Ontario (ONT) FAQs
Cheapest economy fares (ECONOMY) typically include a basic seat and limited amenities; arrival privileges usually permit standard arrival procedures but may restrict upgrades and priority disembarkation. Expect stricter change/cancellation rules and possible baggage fees on arrival if the fare is 'basic economy'.
Yes — the cheapest economy fares often exclude checked baggage and sometimes even a free carry-on on ultra-low-cost carriers. Always check the airline's baggage policy before arrival planning; for international arrivals, fees and size limits can differ significantly.
Most airlines limit or charge for advance seat assignments on the cheapest economy fares; free seat assignment on arrival is uncommon. If you need a specific seat, consider paying for seat selection or upgrading to a higher economy tier before traveling.
Arrival immigration and customs processes are the same regardless of fare, but cheapest economy passengers may face tighter luggage allowances and fewer lounge or expedited-processing options. Plan extra time for customs, and check whether the airline offers paid fast-track services for your arrival country.
For December 2026 travel, pack light to avoid checked-bag fees, prepay baggage online for discounts, and use public transport or shared shuttles from the arrival airport to downtown to reduce ground costs. Booking return flights and parking early can yield combined savings during the holiday peak.
To improve arrival experience on the cheapest economy fare, check in early, upgrade at the counter if seats are available, prepay baggage, and download the airline app for real-time updates. Consider credit cards that offer travel perks like priority boarding or free checked bags to offset low-cost fare limitations.
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Events & Festivals Near Ontario International Airport (ONT) - Travel & Cheap Economy Tips
High-profile events that affect fares from Ontario International Airport (ONT) include Coachella (April) and Stagecoach (April) in nearby Palm Springs/Indio, major Los Angeles conventions (June–September), and holiday festivals in December. During these events, economy fares can surge; book early or target surrounding off-peak dates for cheaper fares. If attending an event, consider flying a day earlier or later to reduce costs.
Best Time to Fly Economy from Ontario International Airport (ONT)
The best time to fly cheap economy from Ontario International Airport (ONT) is typically mid-January through early March and September through early November. For domestic economy, book 6–8 weeks ahead; for international economy, book 2–4 months in advance. Tuesdays and Wednesdays often show lower fares, while Fridays and Sundays are pricier due to weekend travel demand.
Direct vs Connecting Flights for Cheapest Economy from ONT
Connecting flights often yield the cheapest economy fares from Ontario International Airport (ONT), especially for longer distances. However, they add total travel time and connection risk. Direct flights cost more but reduce stress and baggage transfer issues. For short-haul West Coast travel, direct nonstops are common and competitively priced; for transcontinental and international economy travel, compare one-stop itineraries through hubs like Phoenix, Las Vegas, or Los Angeles (LAX) to find lower fares.
Airline Comparison for Cheapest Economy Fares from ONT
Low-cost carriers like Spirit and Frontier often provide the lowest advertised economy fares from Ontario International Airport (ONT), but expect extra fees for bags and seat selection. Southwest frequently offers competitive all-in pricing (two free checked bags on many fares) and flexible rebooking rules, which can represent better value despite a slightly higher headline fare. Legacy carriers (Delta, United, American, Alaska) provide more frequent schedules and bundled services that may reduce ancillary costs when traveling with bags or needing upgrades.
Seasonal Travel Tips for Cheapest Economy Flights from ONT
Spring shoulder seasons (April, September) are best for cheap economy fares from Ontario International Airport (ONT). Summer (June–August) is peak and pricier — book months ahead. Winter holidays (late November–December) spike prices; consider early January for bargains. Pack carry-on only to avoid fees in summer and holiday travel, and use public transit during major events to limit ground transport costs.
Flight Times & Schedules from Ontario International Airport (ONT) - Economy Options
Flight times from Ontario International Airport (ONT) vary by destination and carrier. Typical non-stop economy durations: ONT to Las Vegas 1–1.5 hours, ONT to Phoenix 1.5 hours, ONT to Denver 2–2.5 hours, ONT to Chicago 4–4.5 hours (often one-stop), and ONT to New York City 4.5–6 hours with direct seasonal options sometimes available. Schedules tighten during summer and winter holidays with increased frequencies to leisure destinations.
Cheap Flights from Ontario International Airport (ONT) - Economy Deals
To secure the cheapest economy flights from Ontario International Airport (ONT), set fare alerts, compare nearby airports (LAX, SAN), travel midweek, and be flexible on times and dates. Use price-aggregation tools and book 6–10 weeks in advance for domestic trips and 2–4 months for international economy. Consider bundling flights with hotels or using low-cost carriers like Spirit or Frontier for the lowest base fare, but check total cost including baggage and seat fees.
Tips
- Use flexible-date calendars and search +/- 3 days to reveal cheaper options.
- Compare ONT to LAX and John Wayne (SNA) to ensure you’re getting the best total price.
- Prepay checked bags and seat assignments online to save over airport rates.
- Consider multi-city searches or open-jaw itineraries for cheaper long-haul economy.