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Asuncion

$482+ 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 12/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ASU
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$972
(Priceline)

One-way from

$482
(United)

Popular in

December

Cheapest in

March

Average price

$903
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 ($78 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This Priceline deal was found by Cheapflights users on 7/30. 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 12/206:45 amASU - ONT
2 stops19h 15mAvianca
Deal found 7/30$972
This United Airlines deal was found by Cheapflights users on 7/30. 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 11/251:40 pmONT - ASU
2 stops53h 31mUnited Airlines
Fri 12/191:45 amASU - ONT
2 stops23h 32mUnited Airlines
Deal found 7/30$1,655
This LATAM Airlines deal was found by Cheapflights users on 7/29. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/277:00 amONT - ASU
2 stops21h 55mLATAM Airlines
Fri 12/196:30 pmASU - ONT
2 stops21h 08mLATAM Airlines
Deal found 7/29$2,754
This Mytrip deal was found by Cheapflights users on 7/30. 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 8/511:25 pmONT - ASU
3 stops29h 30mMultiple Airlines
Thu 8/215:00 amASU - ONT
3 stops20h 55mMultiple Airlines
Deal found 7/30$2,830

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 30, 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

6:45 am-9:00 pm

2 stops19h 15m

$972

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Tue 11/25

1:40 pm-12:11 am

2 stops53h 31m

Asuncion Silvio Pettirossi

Fri 12/19

1:45 am-8:17 pm

2 stops23h 32m

$1,655

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Thu 11/27

7:00 am-9:55 am

2 stops21h 55m

Asuncion Silvio Pettirossi

Fri 12/19

6:30 pm-10:38 am

2 stops21h 08m

$2,754

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Sun 12/28

6:04 am-5:40 am

2 stops42h 36m

$482

OntarioAsuncion

ONT - ASU

ONTASU

Ontario

Mon 8/18

6:10 am-11:54 pm

2 stops37h 44m

$854

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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.

Reviews of airlines servicing Asuncion

Get insights into the airlines that provide service to Asuncion. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Asuncion. Reviews last updated July 30, 2025.
Get a feel of what it's like to fly with LATAM Airlines, United Airlines, and Avianca from Ontario to Asuncion by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
LATAM Airlines
7.5
Good
1,822 reviews

Food

6.7

Comfort

7.4

Entertainment

7.0

Boarding

7.6

Crew

8.1

Overall

7.5

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing
LATAM Airlines
7.5
Good
1,822 reviews
LATAM Airlines
7.5
Good
1,822 reviews

Food

6.7

Comfort

7.4

Entertainment

7.0

Boarding

7.6

Crew

8.1

Overall

7.5

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing
United Airlines
7.4
Good
8,896 reviews
LATAM Airlines
7.5
Good
1,822 reviews

Food

6.7

Comfort

7.4

Entertainment

7.0

Boarding

7.6

Crew

8.1

Overall

7.5

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing
Avianca
6.7
Okay
2,387 reviews
LATAM Airlines
7.5
Good
1,822 reviews

Food

6.7

Comfort

7.4

Entertainment

7.0

Boarding

7.6

Crew

8.1

Overall

7.5

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing

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.

  • 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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