Cheap flights from Austin, TX to Ontario, CA

Flights starting at $45. Choose between American Airlines, Frontier Airlines, or United Airlines to find the best price.

Make your travel wishlist, we'll do the rest
Hidden deals
Effortless booking
Travel hacking

Tips to know when travelling to Ontario

Cheapest one-way trip

Cheapest round-trip

Average round-trip

Includes rare itinerary

Travel hack

Most popular airline

One-way trips

Round trips

Travel hack
Austin AUSLos Angeles, CA - Union StationLos Angeles LAXAustin AUS
$115
Travel hack
Austin AUSLas Vegas LASDallas, TX - Greyhound stationAustin AUS
$134
Mailbox
Receive exclusive deals by email
Travelers usually depart from Austin–Bergstrom International, Austin, TX - Greyhound Station, Austin, TX Train Station, Austin, TX - Downtown Bus stop, or Austin-South Congress when they travel from Austin to Ontario. Book your trip to arrive at Ontario International, Ontario Bus Stop, Ontario, CA station, or Montclair (Ontario). The most popular airlines for this route are American Airlines, Frontier Airlines, United Airlines, Spirit Airlines, and Alaska Airlines. Austin and Ontario have 225 direct flights per week.

Check-in for a flight from Austin to Ontario

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
American AirlinesAALAANoNo
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
United AirlinesUALUAYesNo
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
Alaska AirlinesASAASNoOpens 24 days before flight
Closes 1 hours before flight
Learn more about COVID-19 restrictions in United States in our dedicated Stories article.

Frequently asked questions

What are the most popular routes to and from Austin?
What are the most popular routes to and from Ontario?
Which airports are there in Austin?
What airports are near Austin?
What airports are near Ontario?
What buses and trains depart from Austin?
Is it possible to combine flights, buses, and trains in one itinerary when traveling between Austin and Ontario?
What is Virtual Interlining and how do I use it?
Which airlines fly between Austin and Ontario?
When's the best time to travel between Austin and Ontario?
What flights operate between Austin and Ontario?
How many airports are there near Austin?
How many airports are there near Ontario?
Is it possible to reach Austin by bus or train?
What time do nonstop (direct) flights between Austin and Ontario depart?
What time do nonstop (direct) flights between Austin and Ontario arrive?
What time do flights between Austin and Ontario depart?
What time do flights between Austin and Ontario arrive?

Explore alternative trips

Flights from Austin

Flights to Ontario

Popular routes

Find the best connection from Austin to Ontario
Search flights, trains & buses

We hack the system,
you fly for less