Best Flights starting from $127
from$127economy
San Antonio (SAT)
Tue, Mar 31
One-way
Ontario (ONT)
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from$166economy
San Antonio (SAT)
Sun, Mar 29
One-way
Ontario (ONT)
—
from$166economy
San Antonio (SAT)
Mon, Mar 30
One-way
Ontario (ONT)
—
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Other Options for This Route
Other Destinations
San Antonio (SAT) to Detroit (DTW) in March from $82
From $82
San Antonio (SAT) to Tampa (TPA) in March from $89
From $89
San Antonio (SAT) to Indianapolis (IND) in March from $96
From $96
San Antonio (SAT) to San Diego (Any) in March from $127
From $127
San Antonio (SAT) to Las Vegas (LAS) in March from $148
From $148
San Antonio (SAT) to Los Angeles (LAX) in March from $166
From $166
Flights from Other Cities
Cleveland (CLE) to Ontario (ONT) in March from $106
From $106
Denver (Any) to Ontario (ONT) in March from $185
From $185
Salt Lake City (SLC) to Ontario (ONT) in March from $195
From $195
Oklahoma City (OKC) to Ontario (ONT) in March from $208
From $208
Tucson (TUS) to Ontario (ONT) in March from $243
From $243
Indianapolis (IND) to Ontario (ONT) in March from $271
From $271
✈️ Flight Guide: San Antonio (SAT) → Ontario (ONT)
Complete travel information for your March journey
Departing from San Antonio (SAT) FAQs
Cheapest economy flights from Ontario International Airport (ONT) are typically to nearby leisure and domestic hubs like Las Vegas (Harry Reid International Airport (LAS)), Phoenix (Phoenix Sky Harbor International Airport (PHX)), San Diego (San Diego International Airport (SAN)), and Guadalajara (Miguel Hidalgo y Costilla Guadalajara International Airport (GDL)). Low-cost carriers such as Allegiant Air and Volaris often publish sales, and booking 21–60 days ahead can yield the best economy fares. Use fare alerts and flexible date searches to score the lowest prices.
To find the cheapest round-trip economy fare from Ontario International Airport (ONT) this month, search flexible dates across midweek departures, enable price alerts on Google Flights and Skyscanner, and compare low-cost carriers with traditional airlines. Consider nearby airports and red-eye flights for additional savings; always check baggage fees separately to compare total cost. Book when you see a fare drop and lock it with a fare-hold if available.
Yes—December holiday windows and January off-peak weeks often have targeted deals; December can have higher demand around holidays with occasional last-minute deals, while January typically offers lower fares for leisure destinations. Sign up for airline newsletters and watch for post-holiday sales; flexible travel dates in early January can yield the cheapest economy fares. For business-traffic months, look for midweek travel to avoid weekend premiums.
Commonly accessed major cities from Ontario International Airport (ONT) include Los Angeles (Los Angeles International Airport (LAX)), San Diego (San Diego International Airport (SAN)), Las Vegas (Harry Reid International Airport (LAS)), Phoenix (Phoenix Sky Harbor International Airport (PHX)), San Francisco (San Francisco International Airport (SFO)), New York City (John F. Kennedy International Airport (JFK) and Newark Liberty International Airport (EWR)), and Mexico City (Benito Juárez International Airport (MEX)). These hubs offer many cheap economy options and connecting itineraries.
Yes—low-cost carriers like Allegiant Air, Volaris, and occasionally Spirit or Frontier operate from Ontario International Airport (ONT), driving competition and lower headline economy fares. These carriers often offer unbundled pricing, so compare base fare plus baggage and seat fees to full-service airlines to find the true cheapest option. Consider total trip cost including extras when evaluating economy fares.
For cheaper, faster departures from Ontario International Airport (ONT), use economy parking or off-airport lots and book parking online for discounts. Arrive 90 minutes before domestic economy flights and 2 hours for international departures during peak months; use TSA PreCheck to save time, and check airline check-in windows to avoid long lines. Booking early or choosing non-peak departure times can also reduce parking and ride-share surge costs.
Arriving at Ontario (ONT) FAQs
Arrival airports that often offer the cheapest economy fares from Ontario International Airport (ONT) include Harry Reid International Airport (LAS) in Las Vegas, Phoenix Sky Harbor International Airport (PHX), San Diego International Airport (SAN), Denver International Airport (DEN), Miguel Hidalgo y Costilla Guadalajara International Airport (GDL), and Benito Juárez International Airport (MEX) in Mexico City. These routes benefit from frequent low-cost service and competition, which drives down headline economy prices. Compare total trip costs including baggage and seat fees for the best value.
Arrival fees and airport taxes can add to the total cost of a cheap economy ticket; international arrivals like Benito Juárez International Airport (MEX) may include additional passenger taxes or security fees compared to domestic arrivals such as Las Vegas (LAS). When comparing fares, always check the final price including taxes and any mandatory arrival fees. Use the booking summary to confirm total charges before purchase to avoid surprises.
Yes—mid-January through late February and mid-September through early November are usually cheaper for economy arrivals to Harry Reid International Airport (LAS) from Ontario International Airport (ONT) due to lower leisure demand. Avoid major holidays and weekends; traveling midweek often yields the best economy fares. Set fare alerts and be flexible with departure and return days to catch the lowest prices.
When you arrive at budget-friendly airports from ONT—such as Harry Reid International Airport (LAS), Phoenix Sky Harbor International Airport (PHX), or San Diego International Airport (SAN)—you can cheaply access nearby major cities like Los Angeles (Los Angeles International Airport (LAX)), Anaheim (John Wayne Airport (SNA) nearby), Tucson (Tucson International Airport (TUS)), and Riverside/San Bernardino region by short ground travel or regional flights. Combine cheap economy airfares with low-cost ground transport to stretch your travel budget.
For a smooth economy arrival at Benito Juárez International Airport (MEX) or other international hubs, prepare travel documents in advance, check visa requirements, review customs and immigration wait times, and budget for arrival taxes or transit fees. Pre-book authorized taxis or rideshares and have local currency or a working payment method ready. Arrive during off-peak hours if possible to minimize queue times.
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Events and Festivals Affecting Cheap Economy Fares from ONT
Major events and festivals (e.g., Comic-Con in San Diego (San Diego International Airport (SAN)), CES near Las Vegas (Harry Reid International Airport (LAS)), and Dia de los Muertos events in Mexico City (Benito Juárez International Airport (MEX))) can sharply increase economy fares from Ontario International Airport (ONT). To keep fares cheap, avoid traveling on peak event days or book very early. Conversely, traveling to secondary event dates or nearby dates can yield cheaper economy options while still enjoying festival activities. CTA: Check event calendars and adjust travel dates to find cheap economy flights from ONT.
Best Time to Fly Cheap Economy from Ontario International Airport (ONT)
The best time to fly cheap economy from Ontario International Airport (ONT) is typically during shoulder seasons: January–early March and September–November. Book domestic economy flights 3–8 weeks ahead for the lowest prices, while international economy fares often require 2–4 months’ lead time. Midweek departures, early-morning flights, and avoiding holiday weekends increase your chance of finding the cheapest economy fares. CTA: Check flexible dates now to find the best time to fly cheap economy from ONT.
Direct vs Connecting Flights from ONT - Which is Cheaper in Economy?
Direct flights from Ontario International Airport (ONT) are usually more convenient but sometimes pricier than connecting itineraries—especially for longer routes. Connecting flights can be cheaper in economy due to route competition and yield management, but add travel time and connection risk. For the cheapest economy fares, compare both options: if savings exceed the cost of an extra night or the inconvenience of longer travel, choose a connection; otherwise, pay a small premium for nonstop convenience. CTA: Compare direct and connecting economy options from ONT to choose the best fare.
Airline Comparison for Cheap Economy Flights from ONT
Low-cost carriers like Allegiant Air and Volaris frequently offer the lowest headline economy fares from Ontario International Airport (ONT), while legacy carriers may offer higher base fares but include more amenities. When comparing airlines, add expected baggage, seat selection, and change fees to the base fare to understand the true cost. Check frequent flash sales from budget airlines and loyalty program discounts from legacy carriers to find the cheapest economy option for your route. CTA: Compare fares and total costs across airlines for the cheapest economy flight from ONT.
Seasonal Travel Tips for Finding Cheap Economy Fares from ONT
Winter (Dec–Feb): Look for early-December bargains and post-holiday sales; avoid peak holiday windows. Spring (Mar–May): Travel early spring for the best economy fares before peak spring break. Summer (Jun–Aug): Book early and be flexible with off-peak days to avoid high July fares. Fall (Sep–Nov): Best season for cheap economy fares—weekday travel and mid-September dates often yield great deals. Pack carry-on only on low-cost carriers to save on checked bag fees and always compare total trip costs including ancillary fees. CTA: Use seasonal tips to plan and book the cheapest economy flight from ONT now.
Flight Time and Schedules from Ontario International Airport (ONT) - Economy Routes
Common nonstop economy flight times from Ontario International Airport (ONT) include 1–1.5 hours to Las Vegas (Harry Reid International Airport (LAS)) and Phoenix (Phoenix Sky Harbor International Airport (PHX)), 1–1.5 hours to San Diego (San Diego International Airport (SAN)), and roughly 3–4.5 hours to Mexico City (Benito Juárez International Airport (MEX)) depending on route. Early morning and late-night flights are frequent for low-cost carriers and can be cheaper in economy class. For connections, allow at least 90 minutes for domestic transfers and 2–3 hours for international connections when booking the cheapest itineraries to avoid missed connections.
Cheap Flights Strategy from Ontario International Airport (ONT) - Economy Class
To secure cheap economy flights from Ontario International Airport (ONT), use flexible-date searches, subscribe to fare alerts, and compare both low-cost carriers and legacy airlines. Consider nearby airports like Los Angeles International Airport (LAX) and John Wayne Airport (SNA) for alternative routes. Search for midweek departures, red-eye flights, and book 21–60 days before travel for domestic economy routes—long-haul may require earlier booking. CTA: Start a fare alert for cheap economy flights from ONT today.