Best Flights starting from $230
from$230economy
Denver (DEN)
Sat, Jul 4
Roundtrip
Ontario (ONT)
Wed, Jul 15
from$230economy
Denver (DEN)
Tue, Jul 7
Roundtrip
Ontario (ONT)
Sat, Jul 18
from$250economy
Denver (DEN)
Wed, Jul 8
Roundtrip
Ontario (ONT)
Sun, Jul 19
from$250economy
Denver (DEN)
Thu, Jul 9
Roundtrip
Ontario (ONT)
Mon, Jul 20
from$279economy
Denver (DEN)
Fri, Jul 3
Roundtrip
Ontario (ONT)
Tue, Jul 14
from$279economy
Denver (DEN)
Sun, Jul 5
Roundtrip
Ontario (ONT)
Thu, Jul 16
from$290economy
Denver (DEN)
Mon, Jul 6
Roundtrip
Ontario (ONT)
Fri, Jul 17
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Other Destinations
Denver (DEN) to Boston (BOS) in July from $86
From $86
Denver (DEN) to Chicago (ORD) in July from $86
From $86
Denver (DEN) to Seattle (SEA) in July from $108
From $108
Denver (DEN) to Dallas (DFW) in July from $120
From $120
Denver (DEN) to Las Vegas (LAS) in July from $142
From $142
Denver (DEN) to Mexico City (MEX) in July from $159
From $159
Flights from Other Cities
Denver (Any) to Ontario (ONT) in July from $240
From $240
South Bend (SBN) to Ontario (ONT) in July from $369
From $369
Little Rock (LIT) to Ontario (ONT) in July from $427
From $427
Paris (Any) to Ontario (ONT) in July from $830
From $830
Cleveland (Any) to Ontario (ONT) in September from $148
From $148
Eugene (EUG) to Ontario (ONT) in September from $299
From $299
✈️ Flight Guide: Denver (DEN) → Ontario (ONT)
Complete travel information for your July journey
Departing from Denver (DEN) FAQs
To find the cheapest flights from Ontario International Airport (ONT) in March, compare fares across low-cost carriers and aggregators, search 6–8 weeks in advance, and be flexible with departure days — midweek flights usually cost less. Use fare alerts and check nearby hubs like Los Angeles and San Diego for cheaper connecting options. Book early once you spot a fare drop to lock in the savings.
Ontario International Airport (ONT) is served by several low-cost and legacy carriers that offer budget-friendly routes, including Allegiant Air, Southwest Airlines, Spirit Airlines, and select seasonal flights by other carriers. These airlines frequently run sales and flash deals for economy seats, so sign up for their newsletters and follow ONT route announcements to catch the best offers.
Peak travel months at Ontario International Airport (ONT) typically include June through August and December due to summer vacations and winter holidays, leading to higher economy fares and fewer last-minute bargains. For cheaper fares, target shoulder months like April–May or September–October and book early for holiday travel to avoid premium pricing.
For domestic economy flights at Ontario International Airport (ONT), arrive at least 90 minutes before departure to allow time for parking, check-in, security screening, and any unexpected delays. During peak holiday or summer periods, consider arriving two hours early; use online check-in to speed the process and TSA PreCheck if available to minimize security wait times.
Yes, during June Ontario International Airport (ONT) commonly offers direct, affordable economy flights to popular nearby destinations such as Las Vegas and Phoenix, operated by low-cost carriers and regional airlines. Prices rise the closer you book to peak summer dates, so monitor fares and set alerts for the ONT–LAS and ONT–PHX routes to secure the best economy deals.
Ontario International Airport (ONT) offers rental car counters, rideshare pickup zones, airport shuttles, and short- and long-term parking with competitive rates. For the cheapest travel experience, combine economy parking with a rideshare or shuttle if traveling with lots of luggage; book parking in advance for discounts and check airport websites for promo codes before you fly.
Arriving at Ontario (ONT) FAQs
The 'Most Affordable Destinations (CHEAP)' concept highlights frequently low-cost arrival cities from Ontario International Airport (ONT), such as Las Vegas, Phoenix, San Diego, and Los Angeles. These destinations often have high flight frequency and competition among carriers, which drives economy fares down — search flexible dates and compare nonstop and one-stop options for the best price.
To book the cheapest economy seat to popular arrival cities from Ontario International Airport (ONT), use fare comparison tools, flexible-date searches, and sign up for airline newsletters. Consider flying on Tuesdays or Wednesdays, book 1–3 months in advance for domestic economy travel, and compare prices via Los Angeles (LAX) or San Diego (SAN) if direct ONT fares are high.
December typically has fewer cheap deals for high-demand holiday windows, but early December and post-New Year travel can offer lower economy fares to Major Affordable Destinations (CHEAP) like Phoenix and San Diego. Monitor promotions well in advance and consider traveling outside peak holiday dates to secure better rates.
Travelers using the 'Most Affordable Destinations (CHEAP)' network often access major cities and tourist hubs such as Los Angeles, San Diego, Las Vegas, Phoenix, and San Francisco. These cities are well-connected via ground transport and short domestic flights, making them practical and budget-friendly arrival options for economy travelers.
Yes, choosing alternative arrival airports often reduces economy fares because of lower airport fees and higher carrier competition. For example, comparing Ontario International Airport (ONT) to Los Angeles International Airport (LAX) or long-haul connections via Phoenix (PHX) can yield savings. Always factor in ground transport costs and travel time when evaluating total trip savings.
Seasonal events, festivals, and holidays in July typically push arrival prices up in popular destinations like Las Vegas and coastal cities; this reduces cheap economy availability near peak dates. For July travel, secure fares early, look for midweek flights, or choose less event-heavy nearby cities to avoid premium pricing.
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Events & Festivals Affecting Prices for Ontario International Airport (ONT) Travelers
Major events like sports championships, conventions, and music festivals in Los Angeles, San Diego, Las Vegas, and Phoenix can sharply increase economy fares from Ontario International Airport (ONT). Examples include Comic-Con in San Diego, major CES/consumer electronics events in Las Vegas, and large concerts or sporting events in Los Angeles. To avoid price spikes, travel outside major event dates or choose alternative nearby arrival airports. For essential event travel, book months ahead and secure refundable or flexible economy fares if plans change. CTA: Check event calendars before booking economy flights from Ontario International Airport (ONT) to avoid unexpected fare increases.
Best Time to Fly from Ontario International Airport (ONT) for Cheapest Economy Fares
The best time to fly cheaply from Ontario International Airport (ONT) is during shoulder months (April–May, September–October) and midweek (Tuesdays–Wednesdays). For domestic economy travel, book 1–3 months in advance in low season and 3–6 months ahead for peak summer or holiday dates. Early-morning and red-eye flights typically cost less. CTA: Set fare alerts now to capture the best economy prices from Ontario International Airport (ONT).
Direct vs Connecting Flights from Ontario International Airport (ONT) — Economy Comparison
Direct (nonstop) flights from Ontario International Airport (ONT) are faster and more convenient but can be pricier during peak demand. Connecting flights often lower economy fares because they tap into different markets or use cheaper routes via hubs like Los Angeles (LAX) or Phoenix (PHX). If you prioritize cost savings over speed, a one-stop itinerary can substantially reduce your fare; if you value convenience and shorter travel time, choose nonstop. Always compare total travel time and the potential cost of missed connections when booking economy tickets. CTA: Compare direct and connecting options from ONT to find the cheapest economy route for your trip.
Airline Comparison for Economy Routes from Ontario International Airport (ONT)
Low-cost carriers operating out of Ontario International Airport (ONT) like Allegiant Air and Spirit Airlines often present the cheapest base economy fares but charge extra for bags and seat selection. Southwest offers competitive economy pricing with two free checked bags on many routes, which can make it cheaper overall depending on luggage needs. Legacy carriers may charge more but include additional flexibility and connectivity. When comparing airlines, factor in baggage fees, change/cancellation policies, and onboard amenities to determine the true lowest-cost option. CTA: Compare carriers flying from Ontario International Airport (ONT) and book the cheapest economy fare that suits your needs.
Seasonal Travel Tips — Save on Economy Flights from Ontario International Airport (ONT)
Spring and fall shoulder months (April–May, September–October) are the best seasons to find cheap economy flights from Ontario International Airport (ONT). For winter escapes, book early to secure discounted economy seats to warm destinations; for summer travel, reserve 2–3 months in advance. Pack light to avoid baggage fees on low-cost carriers, and consider loyalty programs or credit card offers to offset costs. CTA: Use these seasonal tips to find and book cheap economy flights from Ontario International Airport (ONT) today.
Flight Times & Schedules — Ontario International Airport (ONT) Economy Routes
Typical nonstop economy flight times from Ontario International Airport (ONT) to nearby affordable destinations are short: ONT to Las Vegas (LAS) ~1 hour 10 minutes, ONT to Phoenix (PHX) ~1 hour 30 minutes, ONT to San Diego (SAN) ~45 minutes. Schedules vary by season, with higher frequency in summer and holiday periods. For the best economy fares, compare off-peak departure times (early morning or late evening) and consider one-stop routes via Los Angeles (LAX) to access more flight options. CTA: Check current ONT schedules and book your preferred economy flight time today.
Cheap Flights — Ontario International Airport (ONT) to Affordable Destinations (CHEAP)
To secure cheap flights from Ontario International Airport (ONT) to affordable destinations, use multi-source fare comparison, set fare alerts, and be flexible on departure/arrival dates and airports. Consider low-cost carriers that operate from ONT and evaluate connecting flights through Los Angeles (LAX) or Phoenix (PHX) if nonstop fares are high. Book early for summer and holiday travel and look for midweek discounts to save on economy tickets. CTA: Search cheap economy flights from Ontario International Airport (ONT) and lock in the best rates today.