Best Flights starting from $235
from$235economy
San Antonio (SAT)
Fri, Apr 3
Roundtrip
Ontario (ONT)
Tue, Apr 7
from$235economy
San Antonio (SAT)
Sat, Apr 4
Roundtrip
Ontario (ONT)
Wed, Apr 8
from$315economy
San Antonio (SAT)
Wed, Apr 1
Roundtrip
Ontario (ONT)
Sun, Apr 5
from$394economy
San Antonio (SAT)
Thu, Apr 2
Roundtrip
Ontario (ONT)
Mon, Apr 6
Fields updated — click View Prices to search ↑
Other Options for This Route
Other Destinations
San Antonio (SAT) to Atlanta (Any) in April from $69
From $69
San Antonio (SAT) to Portland (PDX) in April from $90
From $90
San Antonio (SAT) to Los Angeles (LAX) in April from $132
From $132
San Antonio (SAT) to Orlando (Any) in April from $135
From $135
San Antonio (SAT) to Las Vegas (LAS) in April from $168
From $168
San Antonio (SAT) to Philadelphia (PHL) in April from $190
From $190
Flights from Other Cities
San Francisco (SFO) to Ontario (ONT) in April from $59
From $59
Denver (Any) to Ontario (ONT) in April from $73
From $73
Portland (PDX) to Ontario (ONT) in April from $89
From $89
San Francisco (SFO) to Ontario (ONT) in April from $133
From $133
Phoenix (PHX) to Ontario (ONT) in April from $137
From $137
Dallas (DFW) to Ontario (ONT) in April from $177
From $177
✈️ Flight Guide: San Antonio (SAT) → Ontario (ONT)
Complete travel information for your April journey
Departing from San Antonio (SAT) FAQs
To find cheap economy flights from Ontario International Airport (ONT), start by searching flexible dates across multiple travel sites, set price alerts, and compare low-cost carriers like Southwest, Spirit, and Frontier. Book 3–8 weeks in advance for domestic routes and 2–4 months for popular international economy routes to Mexico or the West Coast. Use keywords like "cheap flights from Ontario (ONT)" and "ONT economy deals" when searching to surface the best offers.
Ontario International Airport (ONT) offers a mix of direct and connecting economy flights to major destinations such as Los Angeles, Las Vegas, Phoenix, San Diego, and seasonal routes to Mexico City. Direct routes depend on the season and airline schedules; check carriers' route maps and the ONT flight schedule for current nonstop economy options. For best results search "ONT nonstop economy flights" or "direct cheap flights ONT".
Cheapest economy fares from Ontario International Airport (ONT) often exclude checked bags and sometimes charge for carry-on with ultra-low-cost carriers; always review the airline’s baggage policy before booking. Factor baggage fees into the total price when comparing economy deals to avoid surprises at the airport. Use search phrases like "ONT economy baggage fees" to compare final costs.
June can offer good deals for domestic economy travel from Ontario International Airport (ONT) if you book well in advance and target midweek departures; however, summer demand often raises prices for popular leisure destinations. For savings, search for weekday flights and consider nearby alternatives like Los Angeles (LAX) or John Wayne (SNA) if ONT fares are high. Use seasonal keywords such as "June cheap flights ONT" to narrow results.
Affordable ground options to Ontario International Airport (ONT) include public transit (Metrolink and local buses), shared shuttles, rideshares, and off-airport parking shuttles. Compare cost and convenience: rideshares may be faster from suburban areas while Metrolink is budget-friendly for travelers from downtown Los Angeles, Pomona, or Rancho Cucamonga. Search "ONT parking and transit" or "cheap transit to Ontario International Airport (ONT)" for current rates and schedules.
Airlines serving Ontario International Airport (ONT) frequently run seasonal promotions during January sales, late-summer shoulder season, and holiday flash sales; sign up for airline newsletters and fare alerts to catch these deals. Use keywords like "ONT fare sale" or "Ontario airport economy promo" and monitor January, September, and November for typical discount windows.
Arriving at Ontario (ONT) FAQs
When searching for the cheapest economy arrival options labeled as Cheapest Economy Fare (ECONOMY), prioritize flexible-date searches, sign up for fare alerts, and compare aggregate sites with airline direct offerings. Since ECONOMY is a fare class rather than a specific airport, combine searches for ONT to popular nearby cities like Los Angeles, Las Vegas, San Diego, Phoenix, and Mexico City to identify comparative savings. Use search terms like "ONT to economy cheapest" and "economy fare deals from ONT".
The cheapest economy fare often includes a basic seat and one personal item but may exclude checked baggage, seat selection, and in-flight amenities depending on the airline. Upon arrival, amenities are minimal; plan for potential baggage fees and limited in-flight service. Search for "economy fare inclusions ONT" or "what is included in cheapest economy" to compare offerings across carriers.
Cheapest economy fares sometimes place you on red-eye flights or inconvenient arrival times to maximize price savings; however, not all budget fares require odd schedules. If arrival time is critical, filter results by preferred arrival window when booking from Ontario International Airport (ONT). Use search phrases like "ONT cheap economy arrival times" to find suitable options.
From Ontario International Airport (ONT), travelers booking economy class often access nearby major cities including Los Angeles (LAX), San Diego (SAN), Las Vegas (LAS), Phoenix (PHX), San Francisco (SFO), and even destinations like Denver and Mexico City via connections. Considering these nearby hubs in your search can uncover cheaper economy arrivals and more flight options. Use location modifiers like "ONT to Los Angeles cheap economy" to optimize search results.
Many airlines allow paid upgrades from the cheapest economy fare to standard economy or premium economy, either during booking, at check-in, or via gate offers; availability and price vary. Check the airline’s upgrade policy and look for promotional upgrade offers after booking a basic economy fare from Ontario International Airport (ONT). Search "upgrade cheapest economy ONT" for carrier-specific options.
Booking the cheapest economy arrival typically does not affect immigration or ground transport access at your destination, but early or late arrival times may limit public transit or shuttle availability. Plan transfers in advance if arriving outside peak hours and search "ground transport after economy arrival" along with the destination city name for transit schedules and options.
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Events & Festivals Impacting ONT Economy Fares | Plan & Save
Key events and festivals that affect route demand and pricing from Ontario International Airport (ONT) include: Coachella (April) in Indio which raises demand for economy fares to nearby hubs; Los Angeles Marathon (March) that impacts inbound flights to the Greater LA region; San Diego Comic-Con (July) influencing San Diego route pricing; Las Vegas major conventions (year-round, peaks in spring/fall) driving fares between ONT and LAS; Mexico City cultural festivals (various months) affecting cross-border demand. For cheapest economy fares, avoid peak event dates or book well in advance. Use search phrases like "cheap flights ONT Coachella" or "economy fares ONT Comic-Con" to plan ahead.
Best Time to Fly from Ontario International Airport (ONT) | Save on Economy Fares
The best time to fly from Ontario International Airport (ONT) for cheapest economy fares is typically during shoulder seasons (late January–March and September–October) and midweek (Tuesday–Thursday) departures. Early-morning and late-night flights are often less expensive, and booking 3–8 weeks ahead for domestic economy and 2–4 months for international routes tends to yield better bargains. Use search modifiers like "best time to fly ONT economy" and set fare alerts to capture transient deals. Consider nearby hubs such as Los Angeles (LAX) or San Diego (SAN) for additional route options and potentially lower economy fares.
Direct vs Connecting Flights from ONT | Economy Fare Comparison
Direct (nonstop) flights from Ontario International Airport (ONT) offer convenience and often faster travel times but can be pricier in economy class compared to connecting itineraries. Connecting flights can unlock cheaper economy fares by leveraging hub competition (e.g., routing through Los Angeles, Phoenix, or Denver), although they add travel time and transfer risk. For cheapest economy travel, compare total door-to-door time and full trip cost including baggage fees; search "ONT nonstop economy vs connecting" to evaluate options.
Airline Comparison for ONT | Best Economy Options
Major carriers and their economy features from Ontario International Airport (ONT) include Southwest Airlines (free two checked bags and free changes on many fares), Alaska Airlines (strong West Coast network, complimentary snacks in main cabin on select routes), Spirit Airlines (ultra-low-cost with many add-on fees), Frontier (low base fares with optional add-ons), American Airlines and United Airlines (wider route networks and loyalty benefits). For cheapest economy fares, low-cost carriers like Spirit and Frontier often offer the lowest base price but add fees; Southwest and Alaska may deliver better value after baggage and change policies are factored in. Use keyword variations such as "Southwest ONT economy comparison", "Spirit cheap economy ONT", and "best economy airlines from Ontario International Airport (ONT)" when searching.
Seasonal Travel Tips for ONT | Save on Economy Class
Seasonal travel tips for securing the cheapest economy fares from Ontario International Airport (ONT): Winter (Jan–Feb) — watch post-holiday sales and travel midweek for lower prices; Spring (Mar–May) — avoid peak spring-break weeks but target early spring for deals; Summer (Jun–Aug) — book months ahead, prefer midweek or early-morning flights; Fall (Sep–Nov) — often the best season for cheap economy fares with flexible dates and midweek travel yielding savings. Always compare nearby hubs such as Los Angeles (LAX) and San Diego (SAN) and include LSI keywords like "shoulder-season flights ONT", "economy class packing ONT trips", and "ONT seasonal airfare tips" in searches. CTA: Check flexible-date calendars and sign up for airline deal alerts to capture seasonal economy discounts.
ONT Flight Times & Schedules | Economy Class Durations
Typical flight times and schedules from Ontario International Airport (ONT) to common nearby major cities are: Los Angeles (LAX) — 25 to 45 minutes (short shuttle or regional flights); San Diego (SAN) — about 45 minutes; Las Vegas (LAS) — roughly 1 hour 10 minutes nonstop; Phoenix (PHX) — about 1 hour 20 minutes; San Francisco (SFO) — about 1 hour 25 minutes; Seattle (SEA) — around 2 hours 30 minutes; Denver (DEN) — about 2 hours 20 minutes; Chicago (ORD) — approx. 4 hours; Mexico City (MEX) — typically 3 to 4 hours with many itineraries requiring connections. Schedules vary by season and airline; for cheapest economy fares, search off-peak times like red-eyes and midweek flights, and compare nonstop vs. one-stop schedules. Use phrases like "ONT flight times to Las Vegas" or "ONT schedule economy flights" when researching.
Cheap Flights from Ontario International Airport (ONT) | Economy Fare Tips
Cheap flights from Ontario International Airport (ONT) in economy class can be found year-round by using flexible-date searches, signing up for fare alerts, comparing budget carriers, and considering nearby hubs like Los Angeles (LAX), San Diego (SAN), Las Vegas (LAS), Phoenix (PHX), San Francisco (SFO), and Mexico City. Use primary keywords such as "cheap flights from Ontario (ONT)" and secondary keywords like "ONT economy deals" and LSI phrases like "budget airfare ONT", "low-cost carriers from ONT", and "ONT flight deals". CTA: Sign up for fare alerts and search flexible dates today to find the cheapest economy flights from Ontario International Airport (ONT).