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Asuncion

$547+ Cheap flights from Ontario (ONT) to Asuncion (ASU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ASU
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Ontario to Asuncion

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Asuncion (ASU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$1,017
(Priceline)

One-way from

$547
(United)

Popular in

December

Cheapest in

March

Average price

$896
From Ontario to Asuncion Silvio Pettirossi
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One-way flight from Ontario to Asuncion Silvio Pettirossi
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Highest demand for flights based on searches. 21% potential increase in price ($256 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($77 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Asuncion

Cheapest flights from Ontario to Asuncion
Explore the most affordable flight options available from Ontario to Asuncion. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Priceline deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2510:30 pmONT - ASU
2 stops25h 45mAvianca
Sat 12/208:20 amASU - ONT
2 stops41h 35mAvianca
Deal found 9/10$1,017
This Priceline deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2510:30 pmONT - ASU
2 stops25h 45mAvianca
Tue 12/238:20 amASU - ONT
2 stops17h 35mAvianca
Deal found 9/11$1,198
This Priceline deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2510:30 pmONT - ASU
2 stops25h 45mMultiple Airlines
Sun 12/218:25 amASU - ONT
2 stops19h 34mMultiple Airlines
Deal found 9/11$1,254
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:05 amONT - ASU
2 stops18h 25mUnited Airlines
Mon 12/221:45 amASU - ONT
2 stops24h 22mUnited Airlines
Deal found 9/11$1,637

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Asuncion that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Ontario to Asuncion that are best for you.

Fly from

Ontario

Fly to

Asuncion

Route

Depart

Return

Price

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Tue 11/25

10:30 pm-5:15 am

2 stops25h 45m

Asuncion Silvio Pettirossi

Sat 12/20

8:20 am-8:55 pm

2 stops41h 35m

$1,017

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Thu 1/1

10:30 pm-5:15 am

2 stops25h 45m

Asuncion Silvio Pettirossi

Thu 1/22

8:20 am-8:55 pm

2 stops17h 35m

$1,161

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Tue 11/25

10:30 pm-5:15 am

2 stops25h 45m

Asuncion Silvio Pettirossi

Tue 12/23

8:20 am-8:55 pm

2 stops17h 35m

$1,198

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Tue 11/25

10:30 pm-5:15 am

2 stops25h 45m

Asuncion Silvio Pettirossi

Sun 12/21

8:25 am-10:59 pm

2 stops19h 34m

$1,254

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Tue 11/25

6:05 am-5:30 am

2 stops18h 25m

Asuncion Silvio Pettirossi

Mon 12/22

1:45 am-9:07 pm

2 stops24h 22m

$1,637

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Thu 10/9

6:00 am-4:40 am

2 stops18h 40m

$547

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Sat 11/1

11:30 pm-10:10 am

3 stops30h 40m

$615

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Sat 11/1

6:38 pm-12:11 am

2 stops25h 33m

$989

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Best time to book a flight from Ontario to Asuncion

Have a flexible travel schedule? Discover the best time to fly to Asuncion from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Asuncion

What is the cheapest month to book a flight from Ontario to Asuncion?

Currently, April is the cheapest month in which you can book a flight from Ontario to Asuncion (average of $715). Flying from Ontario to Asuncion in December is currently the most expensive (average of $1,024). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Asuncion. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Asuncion?

    Departing from Ontario to Asuncion will take you 18h 25m. The distance between Ontario and Asuncion is about 5678 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Ontario to Asuncion that include hotel bookings?

    Yes. In addition to deals on Ontario to Asuncion flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Asuncion?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Asuncion.

  • Can I find deals for business class flights from Ontario to Asuncion?

    Yes. Cheapflights offers flight deals from Ontario to Asuncion by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Asuncion?

    Currently, April is the cheapest month in which you can book a flight from Ontario to Asuncion (average of $715). Flying from Ontario to Asuncion in December is currently the most expensive (average of $1,024). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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