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Asuncion

$510+ 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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ASU
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
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 October 29, 2025.

Most accurate provider

Expedia
2 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$1,469
(United Airlines)

One-way from

$510
(FlightHub)

Popular in

December

Cheapest in

March

Average price

$871
Provider with most accurate pricing for Ontario-Asuncion Silvio Pettirossi flight deals.
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Provider most trusted by Cheapflights users for Ontario-Asuncion Silvio Pettirossi flights.
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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. 20% potential increase in price ($248 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($70 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 29, 2025.

This Priceline deal was found by Cheapflights users on 10/27. 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.
Thu 11/610:30 pmONT - ASU
2 stops25h 45mAvianca
Sat 11/158:20 amASU - ONT
2 stops17h 35mAvianca
Deal found 10/27$858
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/512:42 amONT - ASU
3 stops24h 33mMultiple Airlines
Sat 11/158:20 amASU - ONT
2 stops17h 35mMultiple Airlines
Deal found 10/27$1,400
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Sat 11/17:00 amONT - ASU
2 stops18h 30mUnited Airlines
Mon 11/36:33 amASU - ONT
2 stops19h 11mUnited Airlines
Deal found 10/29$1,763
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Wed 12/316:04 amONT - ASU
2 stops18h 26mUnited Airlines
Sun 1/116:42 amASU - ONT
2 stops19h 16mUnited Airlines
Deal found 10/27$1,808
This Gotogate deal was found by Cheapflights users on 10/28. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2811:30 pmONT - ASU
2 stops25h 45mAvianca
Tue 11/48:20 amASU - ONT
2 stops17h 35mAvianca
Deal found 10/28$1,821
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Fri 11/216:00 amONT - ASU
2 stops18h 30mUnited Airlines
Sun 11/236:33 amASU - ONT
2 stops19h 11mUnited Airlines
Deal found 10/28$1,943
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:10 amONT - ASU
3 stops25h 05mMultiple Airlines
Mon 11/36:30 pmASU - ONT
3 stops33h 22mMultiple Airlines
Deal found 10/29$2,420
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:42 amONT - ASU
3 stops23h 33mMultiple Airlines
Sat 1/103:05 amASU - ONT
3 stops22h 50mMultiple Airlines
Deal found 10/27$2,452
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1111:34 pmONT - ASU
3 stops25h 41mMultiple Airlines
Sat 1/103:05 amASU - ONT
3 stops22h 50mMultiple Airlines
Deal found 10/28$2,668

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 October 29, 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

Sun 4/5

6:02 am-12:14 am

2 stops38h 12m

Asuncion Silvio Pettirossi

Wed 4/8

6:42 am-9:21 pm

2 stops42h 39m

$1,469

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Wed 12/31

6:04 am-5:30 am

2 stops18h 26m

Asuncion Silvio Pettirossi

Sun 1/11

6:42 am-8:58 pm

2 stops19h 16m

$1,808

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Fri 11/21

6:00 am-5:30 am

2 stops18h 30m

Asuncion Silvio Pettirossi

Sun 11/23

6:33 am-10:51 pm

3 stops45h 18m

$1,943

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Tue 3/10

6:02 am-5:32 am

2 stops19h 30m

Asuncion Silvio Pettirossi

Fri 3/27

6:42 am-10:35 pm

2 stops19h 53m

$2,055

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Tue 12/30

12:42 am-5:15 am

3 stops23h 33m

Asuncion Silvio Pettirossi

Sat 1/10

3:05 am-8:55 pm

3 stops22h 50m

$2,452

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Thu 12/11

11:34 pm-6:15 am

3 stops25h 41m

Asuncion Silvio Pettirossi

Sat 1/10

3:05 am-8:55 pm

3 stops22h 50m

$2,668

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Fri 1/2

11:34 pm-6:15 am

3 stops25h 41m

Asuncion Silvio Pettirossi

Mon 1/12

6:30 pm-8:55 pm

3 stops31h 25m

$2,785

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Thu 11/6

10:30 pm-5:15 am

2 stops25h 45m

$529

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Sat 11/15

10:30 pm-5:15 am

2 stops49h 45m

$568

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Tue 11/18

12:42 am-6:15 am

3 stops24h 33m

$596

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 19 results
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  • Most accurate provider: When it comes to deals on Ontario-Asuncion flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Ontario-Asuncion flight deals on Cheapflights vs. Expedia 90-95% of the time. Price accuracy is based on data collected from Ontario-Asuncion flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Asuncion flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Asuncion flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 $334). Flying from Ontario to Asuncion in February is currently the most expensive (average of $889). 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 38h 12m. The distance between Ontario and Asuncion is about 5678 mi.

  • 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 $334). Flying from Ontario to Asuncion in February is currently the most expensive (average of $889). 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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