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Cheap flight deals from Austin to Ontario Starting at $40

Discover our range of affordable one-way and round-trip flights from Austin to Ontario and kick-start your next adventure today!

  • One way
  • Round-trip
      • Cheapest nonstop
        AUS02:55 pm
        3h 15m
        Nonstop
        ONT04:10 pm
        Tue, Mar 11|Austin - Ontario|Southwest Airlines
        $114$122
        6% OFF
        6% OFF
        $122$114

        Choose Southwest Airlines flights from Austin to Ontario. The one-way direct flight with Southwest Airlines departs from Austin-Bergstrom International Airport on Tue, Mar 11, arriving at Ontario International Airport. One-way Prices start from $114 including taxes and charges.

      • AUS02:55 pm
        3h 15m
        Nonstop
        ONT04:10 pm
        Wed, Mar 12|Austin - Ontario|Southwest Airlines
        $114$122
        6% OFF
        6% OFF
        $122$114

        Choose Southwest Airlines flights from Austin to Ontario. The one-way direct flight with Southwest Airlines departs from Austin-Bergstrom International Airport on Wed, Mar 12, arriving at Ontario International Airport. One-way Prices start from $114 including taxes and charges.

      • AUS06:10 am
        19h 49m
        1 stop
        ONT11:59 pm
        Tue, Mar 4|Austin - Ontario|Frontier Airlines
        $40$122
        67% OFF
        67% OFF
        $122$40

        Choose Frontier Airlines flights from Austin to Ontario. The one-way connecting flight with Frontier Airlines departs from Austin-Bergstrom International Airport on Tue, Mar 4, arriving at Ontario International Airport. One-way Prices start from $40 including taxes and charges.

      • AUS10:51 pm
        10h 35m
        1 stop
        ONT07:26 am
        Sun, Mar 9|Austin - Ontario|Frontier Airlines
        $45
        $45

        Choose Frontier Airlines flights from Austin to Ontario. The one-way connecting flight with Frontier Airlines departs from Austin-Bergstrom International Airport on Sun, Mar 9, arriving at Ontario International Airport. One-way Prices start from $45 including taxes and charges.

      • AUS05:11 pm
        5h 5m
        1 stop
        ONT08:16 pm
        Mon, Mar 3|Austin - Ontario|Frontier Airlines
        $47
        $47

        Choose Frontier Airlines flights from Austin to Ontario. The one-way connecting flight with Frontier Airlines departs from Austin-Bergstrom International Airport on Mon, Mar 3, arriving at Ontario International Airport. One-way Prices start from $47 including taxes and charges.

      • AUS06:34 pm
        7h 35m
        1 stop
        ONT12:09 am
        Thu, Mar 6|Austin - Ontario|Frontier Airlines
        $47
        $47

        Choose Frontier Airlines flights from Austin to Ontario. The one-way connecting flight with Frontier Airlines departs from Austin-Bergstrom International Airport on Thu, Mar 6, arriving at Ontario International Airport. One-way Prices start from $47 including taxes and charges.

      • AUS06:34 pm
        7h 35m
        1 stop
        ONT12:09 am
        Tue, Mar 11|Austin - Ontario|Frontier Airlines
        $47
        $47

        Choose Frontier Airlines flights from Austin to Ontario. The one-way connecting flight with Frontier Airlines departs from Austin-Bergstrom International Airport on Tue, Mar 11, arriving at Ontario International Airport. One-way Prices start from $47 including taxes and charges.

      • AUS06:10 am
        19h 56m
        1 stop
        ONT12:06 am
        Wed, Feb 19|Austin - Ontario|Frontier Airlines
        $48
        $48

        Choose Frontier Airlines flights from Austin to Ontario. The one-way connecting flight with Frontier Airlines departs from Austin-Bergstrom International Airport on Wed, Feb 19, arriving at Ontario International Airport. One-way Prices start from $48 including taxes and charges.

      • AUS05:11 pm
        16h 15m
        1 stop
        ONT07:26 am
        Sun, Mar 2|Austin - Ontario|Frontier Airlines
        $48
        $48

        Choose Frontier Airlines flights from Austin to Ontario. The one-way connecting flight with Frontier Airlines departs from Austin-Bergstrom International Airport on Sun, Mar 2, arriving at Ontario International Airport. One-way Prices start from $48 including taxes and charges.

      • AUS06:10 am
        19h 49m
        1 stop
        ONT11:59 pm
        Tue, Feb 25|Austin - Ontario|Frontier Airlines
        $50
        $50

        Choose Frontier Airlines flights from Austin to Ontario. The one-way connecting flight with Frontier Airlines departs from Austin-Bergstrom International Airport on Tue, Feb 25, arriving at Ontario International Airport. One-way Prices start from $50 including taxes and charges.

      • AUS01:00 pm
        3h 5m
        Nonstop
        ONT02:00 pm
        Thu, Feb 6|Austin - Ontario|Southwest Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Austin to Los Angeles flight time & flight schedules

Flight info.
Departure
Arrival
Weekly Schedule

  1. F94683

    Frontier Airlines

    04:41 pm

    AUS

    3.1h

    05:45 pm

    LAS

    -----F-
    Search

  2. F94757

    Frontier Airlines

    10:36 am

    LAS

    1.1h

    11:44 am

    ONT

    SMTWTFS

  3. F94683

    Frontier Airlines

    04:41 pm

    AUS

    3.1h

    05:45 pm

    LAS

    -----F-
    Search

  4. F92231

    Frontier Airlines

    04:49 pm

    LAS

    1.1h

    05:57 pm

    ONT

    SMTWTFS

  5. F91815

    Frontier Airlines

    06:00 am

    AUS

    2.4h

    07:25 am

    DEN

    SMTWTFS
    Search

  6. F91261

    Frontier Airlines

    08:07 am

    DEN

    2.5h

    09:40 am

    ONT

    SMTWTFS

  7. F92889

    Frontier Airlines

    06:10 am

    AUS

    2.4h

    07:35 am

    DEN

    S--W--S
    Search

  8. F91261

    Frontier Airlines

    08:07 am

    DEN

    2.5h

    09:40 am

    ONT

    SMTWTFS

  9. F92889

    Frontier Airlines

    06:10 am

    AUS

    2.4h

    07:35 am

    DEN

    S--W--S
    Search

  10. F91499

    Frontier Airlines

    10:38 pm

    DEN

    2.4h

    11:59 pm

    ONT

    SMTWTFS

  11. AS541

    Alaska Airlines

    07:23 am

    AUS

    4.0h

    09:25 am

    PDX

    SMTWTFS
    Search

  12. AS1066

    Alaska Airlines

    09:41 pm

    PDX

    2.3h

    11:59 pm

    ONT

    SMTWTFS

  13. F93645

    Frontier Airlines

    09:52 pm

    AUS

    3.1h

    10:59 pm

    LAS

    S--WT-S
    Search

  14. F91283

    Frontier Airlines

    10:25 am

    LAS

    1.1h

    11:32 am

    ONT

    S--WT--

  15. F93645

    Frontier Airlines

    09:52 pm

    AUS

    3.1h

    10:59 pm

    LAS

    S--WT-S
    Search

  16. F94757

    Frontier Airlines

    10:36 am

    LAS

    1.1h

    11:44 am

    ONT

    SMTWTFS

  17. F93645

    Frontier Airlines

    09:52 pm

    AUS

    3.1h

    10:59 pm

    LAS

    S--WT-S
    Search

  18. F92231

    Frontier Airlines

    04:49 pm

    LAS

    1.1h

    05:57 pm

    ONT

    SMTWTFS

  19. F93645

    Frontier Airlines

    09:52 pm

    AUS

    3.1h

    10:59 pm

    LAS

    S--WT-S
    Search

  20. F91357

    Frontier Airlines

    01:40 pm

    LAS

    1.1h

    02:48 pm

    ONT

    ---W---
Find more flights and airlines

When is the cheapest time to fly from Austin to Ontario?

These price trend charts carefully monitor and predict how flight prices from Austin to Ontario will change. Keep a close eye on them to understand when the best time to buy your tickets is.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • When are flight tickets from Austin (AUS) to Ontario (ONT) the cheapest?

    Airlines adjust prices for flights from Austin to Ontario based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Austin (AUS) to Ontario (ONT) cost?

    According to Trip.com's data, the lowest price is around $286.

How to find a cheap flight from Austin to Ontario

Understanding the common pitfalls when booking your flight tickets can help you save massively when it comes time to fly. We’ve listed our six essential steps to keep in mind when you’re booking flight tickets to help you find the best price.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Info | Austin to Ontario

Cheapest nonstop flight price$39
Cheapest round-trip ticket price$172
Off-season for travelMarch
Peak season for travelJune
Flight distance10,754.2 km
Popular airlineFrontier Airlines

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