Cheap Flights from Austin to Ontario (AUS to ONT) from $110.00

Trade the vibrant live music scene of Austin for the sunny gateways of Southern California with affordable flights from Austin (AUS) to Ontario (ONT). Globitude Travels helps you compare fares starting as low as $106 from top carriers like Frontier, Delta, Southwest, and United. Book your trip today and enjoy an effortless West Coast getaway.

📞 Call 1-856-513-6369

Cheapest fares from Austin to Ontario

Lowest fare found per airline on the AUS → ONT route, with our discounted phone-deal price.

Airline	Cabin	Found fare	Our discounted fare	Fare found on
Frontier	Economy	~~$183.99~~	$110.39	Sep 12, 2026	Book
American Airlines	Economy	~~$313.20~~	$187.92	Sep 12, 2026	Book
Alaska Airlines	Economy	~~$369.00~~	$221.40	Sep 12, 2026	Book
Delta Air Lines	Economy	~~$426.20~~	$255.72	Sep 12, 2026	Book
United Airlines	Economy	~~$426.20~~	$255.72	Sep 12, 2026	Book
Southwest	Economy	~~$427.00~~	$256.20	Sep 12, 2026	Book

Discounted fares are negotiated phone deals from our vendor network and may not appear in online search results — call 1-856-513-6369 to lock one in. Fares were found on the dates shown, are per person in USD, and change with availability.

Flying from Austin to Ontario, California

Traveling from Austin-Bergstrom International Airport (AUS) to Ontario International Airport (ONT) offers a convenient, stress-free route into Southern California's Inland Empire. Situated east of Los Angeles, Ontario serves as an ideal launchpad for exploring regional vineyards, scenic mountain trails near Big Bear, and bustling local dining spots without the heavy traffic of larger coastal hubs.

Southern California boasts a warm, Mediterranean climate, making Ontario a great year-round destination. Whether you are catching a budget deal on Frontier Airlines or prefer full-service options with Delta, Southwest, or United, Globitude Travels helps you secure competitive fares tailored to your travel needs.

Money-saving tips for this route

Consider flying on Tuesdays or Wednesdays to unlock the lowest base fares between Austin and Ontario.
Travel light on low-cost carriers like Frontier to minimize extra charges for carry-on and checked luggage.
Set up price notifications with Globitude Travels to catch sudden fare discounts from Delta, Southwest, and United.
Choose Ontario International Airport (ONT) over busier Los Angeles hubs to save time on ground transportation and car rentals.

Frequently asked questions

Which airlines offer flights from Austin (AUS) to Ontario (ONT)?

You can fly on carriers including Frontier Airlines, Delta Air Lines, Southwest Airlines, and United Airlines, with fares starting as low as $106.

What airports serve this flight route?

Flights depart from Austin-Bergstrom International Airport (AUS) in Texas and arrive at Ontario International Airport (ONT) in Southern California.

What is generally the cheapest time to book flights to Ontario?

Booking at least three to six weeks in advance, especially during off-peak seasons like late autumn and winter, often yields the best rates.

Are flights on this route direct or do they require stops?

Flight itineraries vary by airline, with many routes including a quick single connection depending on the carrier you choose.

Can I book my Austin to Ontario flight by phone with Globitude Travels?

Yes, you can call Globitude Travels directly to speak with a travel agent, compare real-time fares, and complete your booking over the phone.

Related routes

Austin to Ahmedabad Austin to Albuquerque Austin to Baltimore Austin to Carlsbad Austin to Cleveland Austin to Denver Atlanta to Ontario Augusta to Ontario Baton Rouge to Ontario Blountville to Ontario Boise to Ontario Boston to Ontario All routes →

Why book with Globitude Travels

💸 Transparent pricing
The fare you see is all-inclusive — taxes and fees shown before you pay, never after.

🤝 Real travel experts
Every booking is reviewed by our team, and phone-only vendor deals can beat any online price.

🎧 24/7 human support
Before, during and after your trip — changes, cancellations and special requests handled by people.

🔒 Secure checkout
Encrypted payment, verified confirmation emails, and your PNR delivered as soon as the airline issues it.

Globitude Travels is an independent travel agency — call 1-856-513-6369 or use the search above to compare live fares on this route. See our terms, privacy policy, refund policy and service fees for full details, or contact us any time.

Page updated September 13, 2026 · fare data refreshed automatically from live flight searches.