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Asuncion

$539+ 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ASU
Aug 23 — Aug 301
Sun 8/23
Sun 8/30
1 adult, Economy
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Cheap 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 July 24, 2026.

This Justfly.com deal was found by Cheapflights users on 7/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/710:30 pm
ONT
-
ASU
2 stops49h 45m
Avianca
Sat 11/148:20 am
ASU
-
ONT
2 stops17h 35m
Avianca
Deal found 7/22$961
This Mytrip deal was found by Cheapflights users on 7/20. 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 9/1711:35 pm
ONT
-
ASU
2 stops49h 05m
Avianca
Fri 10/28:25 am
ASU
-
ONT
2 stops41h 20m
Avianca
Deal found 7/20$1,233
This Mytrip deal was found by Cheapflights users on 7/23. 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 9/49:36 pm
ONT
-
ASU
2 stops27h 04m
Multiple Airlines
Mon 9/76:35 pm
ASU
-
ONT
3 stops32h 30m
Multiple Airlines
Deal found 7/23$1,253
This eDestinos deal was found by Cheapflights users on 7/21. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2011:35 pm
ONT
-
ASU
2 stops49h 05m
Multiple Airlines
Thu 8/278:10 am
ASU
-
ONT
3 stops42h 55m
Multiple Airlines
Deal found 7/21$1,296
This Sembo deal was found by Cheapflights users on 7/19. 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 Sembo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/311:35 pm
ONT
-
ASU
2 stops20h 28m
Multiple Airlines
Thu 9/106:33 am
ASU
-
ONT
2 stops19h 12m
Multiple Airlines
Deal found 7/19$1,508
This United Airlines deal was found by Cheapflights users on 7/21. 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.
Thu 10/296:00 am
ONT
-
ASU
2 stops43h 31m
United Airlines
Mon 11/26:31 am
ASU
-
ONT
2 stops44h 19m
United Airlines
Deal found 7/21$1,581
This Mytrip deal was found by Cheapflights users on 7/20. 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.
Sat 10/3112:55 am
ONT
-
ASU
3 stops25h 20m
Multiple Airlines
Mon 11/910:35 pm
ASU
-
ONT
3 stops27h 20m
Multiple Airlines
Deal found 7/20$1,613

Find 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 July 24, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$940
(oojo)

One-way from

$539
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$964
Provider with most accurate pricing for Ontario-Asuncion Silvio Pettirossi flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Asuncion Silvio Pettirossi flights.
Search Deals
From Ontario to Asuncion Silvio Pettirossi
Search Deals
One-way flight from Ontario to Asuncion Silvio Pettirossi
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($86 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 July 24, 2026.
Use the filters below to find and compare flights from Ontario to Asuncion that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Fri 9/4

9:36 pm-4:40 am

2 stops27h 04m

Asuncion Silvio Pettirossi

Mon 9/7

6:35 pm-11:05 pm

3 stops32h 30m

$1,253

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Thu 8/20

11:35 pm-4:40 am

2 stops49h 05m

Asuncion Silvio Pettirossi

Thu 8/27

8:10 am-11:05 pm

3 stops42h 55m

$1,296

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Thu 9/3

11:35 pm-4:40 am

2 stops49h 05m

Asuncion Silvio Pettirossi

Thu 9/10

6:35 pm-11:05 pm

3 stops32h 30m

$1,521
Quickest round-trip

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Wed 1/6

6:00 am-5:36 am

2 stops18h 36m

Asuncion Silvio Pettirossi

Wed 1/13

6:38 am-9:21 pm

2 stops19h 43m

$1,534

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Wed 12/30

5:45 am-5:36 am

2 stops42h 51m

Asuncion Silvio Pettirossi

Wed 1/13

6:38 am-9:21 pm

2 stops19h 43m

$1,551

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Thu 10/29

6:00 am-5:31 am

2 stops43h 31m

Asuncion Silvio Pettirossi

Mon 11/2

6:31 am-9:50 pm

2 stops44h 19m

$1,581
Cheapest one-way

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Thu 9/17

11:35 pm-4:40 am

2 stops49h 05m

$636

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Wed 7/29

5:45 am-11:57 pm

2 stops38h 12m

$922
Quickest one-way

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Tue 7/28

12:55 am-10:35 am

3 stops29h 40m

$1,014

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/22

Sorted by cheapest first
  • 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% 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.

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 36m. 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.

See more FAQs

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