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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 4/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ASU
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
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 March 10, 2026.

This Avianca deal was found by Cheapflights users on 3/7. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:35 pm
ONT
-
ASU
2 stops49h 05m
Avianca
Fri 5/18:25 am
ASU
-
ONT
2 stops41h 20m
Avianca
Deal found 3/7$987
This Mytrip deal was found by Cheapflights users on 3/8. 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 5/2712:55 am
ONT
-
ASU
3 stops23h 45m
Multiple Airlines
Mon 6/810:25 pm
ASU
-
ONT
3 stops27h 20m
Multiple Airlines
Deal found 3/8$1,128
This United Airlines deal was found by Cheapflights users on 3/6. 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.
Sun 5/315:45 am
ONT
-
ASU
2 stops38h 23m
United Airlines
Sun 6/216:33 am
ASU
-
ONT
2 stops43h 22m
United Airlines
Deal found 3/6$1,474
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Mon 11/165:00 am
ONT
-
ASU
2 stops38h 14m
United Airlines
Fri 11/206:42 am
ASU
-
ONT
2 stops43h 39m
United Airlines
Deal found 3/8$1,725
This United Airlines deal was found by Cheapflights users on 3/9. 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 3/286:37 pm
ONT
-
ASU
2 stops30h 53m
United Airlines
Mon 4/66:33 am
ASU
-
ONT
2 stops43h 17m
United Airlines
Deal found 3/9$1,749
This United Airlines deal was found by Cheapflights users on 3/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/186:00 am
ONT
-
ASU
2 stops38h 15m
United Airlines
Sun 3/296:43 am
ASU
-
ONT
2 stops33h 55m
United Airlines
Deal found 3/10$1,813
This United Airlines deal was found by Cheapflights users on 3/8. 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 7/81:50 pm
ONT
-
ASU
3 stops30h 07m
United Airlines
Mon 7/206:33 am
ASU
-
ONT
2 stops44h 13m
United Airlines
Deal found 3/8$1,998
This United Airlines deal was found by Cheapflights users on 3/7. 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 3/116:00 am
ONT
-
ASU
2 stops19h 32m
United Airlines
Fri 3/136:42 am
ASU
-
ONT
2 stops19h 54m
United Airlines
Deal found 3/7$2,028
This United Airlines deal was found by Cheapflights users on 3/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/166:00 am
ONT
-
ASU
2 stops19h 32m
United Airlines
Thu 3/266:42 am
ASU
-
ONT
2 stops19h 54m
United Airlines
Deal found 3/10$2,043

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 March 10, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$987
(Avianca)

One-way from

$547
(Mytrip)
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

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 March 10, 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

Thu 4/16

11:35 pm-4:40 am

2 stops49h 05m

Asuncion Silvio Pettirossi

Fri 5/1

8:25 am-9:45 pm

2 stops41h 20m

$987

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Thu 5/28

11:35 pm-4:40 am

2 stops49h 05m

Asuncion Silvio Pettirossi

Mon 6/8

10:25 pm-9:45 pm

3 stops27h 20m

$1,156

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Sun 5/31

5:45 am-12:08 am

2 stops38h 23m

Asuncion Silvio Pettirossi

Sun 6/21

6:33 am-9:55 pm

2 stops43h 22m

$1,474

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Sat 3/28

6:37 pm-5:30 am

2 stops30h 53m

Asuncion Silvio Pettirossi

Mon 4/6

6:33 am-9:50 pm

2 stops43h 17m

$1,749

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Fri 7/24

1:18 pm-5:25 am

2 stops36h 07m

Asuncion Silvio Pettirossi

Fri 8/7

6:33 am-9:55 pm

2 stops43h 22m

$1,998
Quickest round-trip

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Wed 7/8

5:45 am-5:25 am

2 stops19h 40m

Asuncion Silvio Pettirossi

Wed 7/15

6:33 am-9:55 pm

2 stops43h 22m

$1,998

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Sun 7/12

1:50 pm-11:57 pm

3 stops30h 07m

Asuncion Silvio Pettirossi

Mon 7/20

6:33 am-10:46 pm

2 stops44h 13m

$1,998

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Fri 7/10

1:18 pm-11:57 pm

2 stops30h 39m

Asuncion Silvio Pettirossi

Wed 7/15

6:33 am-9:55 pm

2 stops43h 22m

$1,998

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Wed 7/8

5:45 am-5:25 am

2 stops19h 40m

Asuncion Silvio Pettirossi

Mon 7/20

6:33 am-10:46 pm

2 stops44h 13m

$1,998
Cheapest one-way

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Fri 4/24

12:55 am-4:40 am

3 stops23h 45m

$547

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 20 resultsSorted by cheapest first
1
2
  • 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.

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 November is currently the most expensive (average of $838). 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 23m. 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 $334). Flying from Ontario to Asuncion in November is currently the most expensive (average of $838). 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.

See more FAQs

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