App
Customer Support
EUR
Find Bookings
Trip.com
>
Cheap Flights
>
Argentina
>
Santa Fe
>
Rosario
>
Flights from Ontario to Rosario
Worldwide Coverage
Worldwide Coverage
Flights to over 5,000 cities
One-stop Service Guarantee
One-stop Service Guarantee
Price guaranteed upon confirmed payment, booking guaranteed once tickets issued
Secure Payment
Secure Payment
Convenient & reliable booking and payment system

Flights from Ontario to Rosario Starting at €620

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Round-trip
      • ONT06:00
        28h 25m
        2 stops
        ROS14:25
        Sun, Mar 16|Ontario - Rosario|United Airlines
        €620€1,108
        44% OFF
        44% OFF
        €1,108€620

        Choose United Airlines flights from Ontario to Rosario. The one-way connecting flight with United Airlines departs from Ontario International Airport on Sun, Mar 16, arriving at Rosario International Airport. One-way Prices start from €620 including taxes and charges.

      • ONT06:05
        39h 40m
        2 stops
        ROS01:45
        Mon, Apr 28|Ontario - Rosario|United Airlines
        €622€1,108
        44% OFF
        44% OFF
        €1,108€622

        Choose United Airlines flights from Ontario to Rosario. The one-way connecting flight with United Airlines departs from Ontario International Airport on Mon, Apr 28, arriving at Rosario International Airport. One-way Prices start from €622 including taxes and charges.

      • ONT06:00
        26h 15m
        2 stops
        ROS13:15
        Fri, Mar 7|Ontario - Rosario|United Airlines
        €623€1,108
        44% OFF
        44% OFF
        €1,108€623

        Choose United Airlines flights from Ontario to Rosario. The one-way connecting flight with United Airlines departs from Ontario International Airport on Fri, Mar 7, arriving at Rosario International Airport. One-way Prices start from €623 including taxes and charges.

      • ONT06:00
        26h 15m
        2 stops
        ROS13:15
        Sat, Feb 22|Ontario - Rosario|United Airlines
        €628
        €628

        Choose United Airlines flights from Ontario to Rosario. The one-way connecting flight with United Airlines departs from Ontario International Airport on Sat, Feb 22, arriving at Rosario International Airport. One-way Prices start from €628 including taxes and charges.

      • ONT06:00
        33h 20m
        2 stops
        ROS19:20
        Tue, Mar 25|Ontario - Rosario|United Airlines
        €701
        €701

        Choose United Airlines flights from Ontario to Rosario. The one-way connecting flight with United Airlines departs from Ontario International Airport on Tue, Mar 25, arriving at Rosario International Airport. One-way Prices start from €701 including taxes and charges.

      • ONT06:00
        44h 50m
        2 stops
        ROS07:50
        Wed, Feb 26|Ontario - Rosario|United Airlines
        €731
        €731

        Choose United Airlines flights from Ontario to Rosario. The one-way connecting flight with United Airlines departs from Ontario International Airport on Wed, Feb 26, arriving at Rosario International Airport. One-way Prices start from €731 including taxes and charges.

      • ONT06:00
        46h 30m
        2 stops
        ROS08:30
        Mon, Mar 24|Ontario - Rosario|United Airlines
        €744
        €744

        Choose United Airlines flights from Ontario to Rosario. The one-way connecting flight with United Airlines departs from Ontario International Airport on Mon, Mar 24, arriving at Rosario International Airport. One-way Prices start from €744 including taxes and charges.

      • ONT06:05
        45h 45m
        2 stops
        ROS07:50
        Tue, Apr 15|Ontario - Rosario|United Airlines
        €755
        €755

        Choose United Airlines flights from Ontario to Rosario. The one-way connecting flight with United Airlines departs from Ontario International Airport on Tue, Apr 15, arriving at Rosario International Airport. One-way Prices start from €755 including taxes and charges.

      • ONT06:05
        33h 15m
        2 stops
        ROS19:20
        Wed, Apr 2|Ontario - Rosario|United Airlines
        €791
        €791

        Choose United Airlines flights from Ontario to Rosario. The one-way connecting flight with United Airlines departs from Ontario International Airport on Wed, Apr 2, arriving at Rosario International Airport. One-way Prices start from €791 including taxes and charges.

      • ONT06:00
        27h 25m
        2 stops
        ROS14:25
        Sun, Feb 16|Ontario - Rosario|United Airlines
        €840
        €840

        Choose United Airlines flights from Ontario to Rosario. The one-way connecting flight with United Airlines departs from Ontario International Airport on Sun, Feb 16, arriving at Rosario International Airport. One-way Prices start from €840 including taxes and charges.

      • ONT01:00 pm
        3h 5m
        Nonstop
        ROS02:00 pm
        Sun, Feb 23|Ontario - Rosario|United Airlines
        Find More Flights
        Find More Flights

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

Los Angeles to Rosario flight time & flight schedules

Flight info.
Departure
Arrival
Weekly Schedule

  1. UA722

    United Airlines

    06:00

    ONT

    3.0h

    11:02

    IAH

    SMTWTFS
    Search

  2. UA831

    United Airlines

    18:30

    IAH

    10.8h

    07:20

    EZE

    SMTWTFS

  3. AR1708

    Aerolineas Argentinas

    06:50

    AEP

    1.0h

    07:50

    ROS

    SMTWTF-

  4. UA722

    United Airlines

    06:00

    ONT

    3.0h

    11:02

    IAH

    SMTWTFS
    Search

  5. UA129

    United Airlines

    20:20

    IAH

    10.3h

    09:35

    GIG

    SMTWTFS

  6. G37722

    Gol Linhas Aereas Inteligentes

    22:30

    GIG

    3.6h

    02:05

    ROS

    SMTWTFS

  7. UA722

    United Airlines

    06:00

    ONT

    3.0h

    11:02

    IAH

    SMTWTFS
    Search

  8. UA819

    United Airlines

    20:15

    IAH

    9.8h

    08:00

    EZE

    SMTWTFS

  9. AR1712

    Aerolineas Argentinas

    06:40

    AEP

    1.0h

    07:40

    ROS

    S-T--FS

  10. UA722

    United Airlines

    06:00

    ONT

    3.0h

    11:02

    IAH

    SMTWTFS
    Search

  11. UA819

    United Airlines

    20:15

    IAH

    9.8h

    08:00

    EZE

    SMTWTFS

  12. AR1718

    Aerolineas Argentinas

    17:45

    AEP

    1.0h

    18:45

    ROS

    ---W--S

  13. UA722

    United Airlines

    06:00

    ONT

    3.0h

    11:02

    IAH

    SMTWTFS
    Search

  14. UA831

    United Airlines

    18:30

    IAH

    10.8h

    07:20

    EZE

    SMTWTFS

  15. AR1716

    Aerolineas Argentinas

    12:05

    AEP

    1.0h

    13:05

    ROS

    S-T-T--

  16. UA722

    United Airlines

    06:00

    ONT

    3.0h

    11:02

    IAH

    SMTWTFS
    Search

  17. UA819

    United Airlines

    20:15

    IAH

    9.8h

    08:00

    EZE

    SMTWTFS

  18. AR1378

    Aerolineas Argentinas

    12:55

    AEP

    1.0h

    13:55

    ROS

    ----T--

  19. UA722

    United Airlines

    06:00

    ONT

    3.0h

    11:02

    IAH

    SMTWTFS
    Search

  20. UA831

    United Airlines

    18:30

    IAH

    10.8h

    07:20

    EZE

    SMTWTFS

  21. AR1712

    Aerolineas Argentinas

    06:40

    AEP

    1.0h

    07:40

    ROS

    S-T--FS

  22. DL761

    Delta Air Lines

    07:00

    ONT

    4.2h

    14:09

    ATL

    SMTWTFS
    Search

  23. DL151

    Delta Air Lines

    14:22

    ATL

    6.5h

    20:55

    LIM

    SMTWTFS

  24. LA2432

    LATAM Airlines

    00:05

    LIM

    4.0h

    06:05

    ROS

    --T-T-S

  25. DL665

    Delta Air Lines

    13:00

    ONT

    4.2h

    20:10

    ATL

    SMTWTFS
    Search

  26. LA2483

    LATAM Airlines

    23:20

    ATL

    6.7h

    05:00

    LIM

    SMTWTFS

  27. LA2432

    LATAM Airlines

    00:05

    LIM

    4.0h

    06:05

    ROS

    --T-T-S

  28. AA2635

    American Airlines

    14:54

    ONT

    2.9h

    19:49

    DFW

    SMTWTFS
    Search

  29. AA997

    American Airlines

    20:40

    DFW

    10.5h

    09:10

    EZE

    SMTWTFS

  30. AR1718

    Aerolineas Argentinas

    17:45

    AEP

    1.0h

    18:45

    ROS

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

Find the best time to fly from Ontario to Rosario

We monitor flight fares to help you find the best deals effortlessly

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

FAQ

  • When are flight tickets from Ontario (ONT) to Rosario (ROS) the cheapest?

    Airlines adjust prices for flights from Ontario to Rosario 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 Ontario (ONT) to Rosario (ROS) cost?

    According to Trip.com's data, the lowest price is around €1,209.

  • What is the transportation method from the main airport to downtown in Rosario?

    • The distance from Rosario International Airport to downtown is about 12 km. It takes about 30 minutes by taxi.

How to find a cheap flight from Ontario to Rosario

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Ontario to Rosario. Book your flights at the right time and save more.
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 Information from Ontario to Rosario

Flight distance7,317.49 km
Popular airlineDelta Air Lines

Contact Us

About

Other Services

Payment Methods
Our Partners
Copyright © 2025 Trip.com Travel Singapore Pte. Ltd. All rights reserved
Site Operator: Trip.com Travel Singapore Pte. Ltd.