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$425+ Cheap flights from Ontario (ONT) to Vienna (VIE)

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 3/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — VIE
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Cheap flight deals from Ontario to Vienna

Cheapest flights from Ontario to Vienna
Explore the most affordable flight options available from Ontario to Vienna. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This oojo deal was found by Cheapflights users on 1/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/154:52 pm
ONT
-
VIE
2 stops17h 38m
British Airways
Thu 4/237:40 am
VIE
-
ONT
2 stops23h 19m
British Airways
Deal found 1/20$902
This oojo deal was found by Cheapflights users on 1/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/162:39 pm
ONT
-
VIE
2 stops23h 56m
British Airways
Mon 3/239:15 pm
VIE
-
ONT
2 stops30h 30m
British Airways
Deal found 1/19$903
This Delta deal was found by Cheapflights users on 1/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1112:57 pm
ONT
-
VIE
2 stops19h 13m
Delta
Tue 3/246:50 am
VIE
-
ONT
2 stops18h 23m
Delta
Deal found 1/19$922
This Delta deal was found by Cheapflights users on 1/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1112:57 pm
ONT
-
VIE
2 stops19h 13m
Delta
Fri 3/206:15 am
VIE
-
ONT
2 stops25h 36m
Delta
Deal found 1/19$927
This United Airlines deal was found by Cheapflights users on 1/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/111:50 pm
ONT
-
VIE
2 stops20h 15m
United Airlines
Mon 3/2310:55 am
VIE
-
ONT
1 stop19h 23m
United Airlines
Deal found 1/19$949
This Turkish Airlines deal was found by Cheapflights users on 1/21. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/712:02 pm
ONT
-
VIE
2 stops35h 23m
Multiple Airlines
Sat 3/146:45 am
VIE
-
ONT
2 stops24h 47m
Multiple Airlines
Deal found 1/21$961
This United Airlines deal was found by Cheapflights users on 1/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:05 am
ONT
-
VIE
2 stops40h 15m
United Airlines
Sun 4/1910:30 am
VIE
-
ONT
2 stops44h 56m
United Airlines
Deal found 1/20$996
This United Airlines deal was found by Cheapflights users on 1/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/15:00 am
ONT
-
VIE
2 stops21h 55m
United Airlines
Sat 5/910:30 am
VIE
-
ONT
1 stop16h 31m
United Airlines
Deal found 1/20$1,002
This oojo deal was found by Cheapflights users on 1/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/112:39 pm
ONT
-
VIE
2 stops17h 31m
British Airways
Mon 3/239:15 pm
VIE
-
ONT
2 stops30h 30m
British Airways
Deal found 1/19$1,028
This oojo deal was found by Cheapflights users on 1/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/215:02 pm
ONT
-
VIE
2 stops17h 08m
British Airways
Wed 4/89:25 pm
VIE
-
ONT
2 stops27h 57m
British Airways
Deal found 1/20$1,098
This oojo deal was found by Cheapflights users on 1/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/37:00 am
ONT
-
VIE
2 stops18h 50m
British Airways
Mon 4/139:15 pm
VIE
-
ONT
2 stops30h 22m
British Airways
Deal found 1/20$1,108

Find flight deals from Ontario to Vienna

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Vienna (VIE). 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 January 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$887
(United Airlines)

One-way from

$425
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$734
Provider with most accurate pricing for Ontario-Vienna Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Vienna Intl flights.
Search Deals
From Ontario to Vienna Intl
Search Deals
One-way flight from Ontario to Vienna Intl
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($206 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Vienna 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 January 21, 2026.
Use the filters below to find and compare flights from Ontario to Vienna that are best for you.

Fly from

Ontario

Fly to

Vienna

Route

Depart

Return

Price

OntarioVienna

ONT - VIE

ONTVIE

Ontario

Wed 3/11

12:57 pm-4:10 pm

2 stops19h 13m

Vienna Intl

Tue 3/24

6:50 am-5:13 pm

2 stops18h 23m

$922

OntarioVienna

ONT - VIE

ONTVIE

Ontario

Wed 3/11

12:57 pm-4:10 pm

2 stops19h 13m

Vienna Intl

Thu 3/26

6:15 am-11:51 pm

2 stops25h 36m

$927

OntarioVienna

ONT - VIE

ONTVIE

Ontario

Wed 3/11

1:50 pm-6:05 pm

2 stops20h 15m

Vienna Intl

Mon 3/23

10:55 am-10:18 pm

1 stop19h 23m

$949

OntarioVienna

ONT - VIE

ONTVIE

Ontario

Thu 4/16

11:05 am-12:20 pm

2 stops40h 15m

Vienna Intl

Sun 4/19

10:30 am-10:26 pm

2 stops44h 56m

$996

OntarioVienna

ONT - VIE

ONTVIE

Ontario

Fri 5/1

5:00 am-11:55 am

2 stops21h 55m

Vienna Intl

Sat 5/9

10:30 am-6:01 pm

1 stop16h 31m

$1,002

OntarioVienna

ONT - VIE

ONTVIE

Ontario

Wed 3/11

2:39 pm-4:10 pm

2 stops17h 31m

Vienna Intl

Mon 3/23

9:15 pm-7:45 pm

2 stops30h 30m

$1,028

OntarioVienna

ONT - VIE

ONTVIE

Ontario

Fri 4/3

7:00 am-10:50 am

2 stops18h 50m

Vienna Intl

Mon 4/13

9:15 pm-6:37 pm

2 stops30h 22m

$1,108

OntarioVienna

ONT - VIE

ONTVIE

Ontario

Wed 3/11

6:15 am-8:45 am

2 stops18h 30m

Vienna Intl

Tue 3/24

10:35 am-10:18 pm

2 stops19h 43m

$1,169

OntarioVienna

ONT - VIE

ONTVIE

Ontario

Fri 3/6

6:15 am-12:20 pm

2 stops21h 05m

Vienna Intl

Fri 3/13

10:35 am-10:18 pm

2 stops43h 43m

$1,184

OntarioVienna

ONT - VIE

ONTVIE

Ontario

Sun 3/1

10:56 am-1:30 pm

2 stops17h 34m

Vienna Intl

Sun 3/8

7:25 am-9:07 pm

2 stops22h 42m

$1,202

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 21 results
1
2
3
  • Most accurate provider: When it comes to deals on Ontario-Vienna flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Vienna flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Vienna flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Vienna flights, Cheapflights users trust FlightHub the most. FlightHub 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-Vienna 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 Vienna

Have a flexible travel schedule? Discover the best time to fly to Vienna 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 Vienna

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

Currently, October is the cheapest month in which you can book a flight from Ontario to Vienna (average of $407). Flying from Ontario to Vienna in June is currently the most expensive (average of $805). 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 Vienna. 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 Vienna?

    Delta and United Airlines can get you from Ontario to Vienna in just under 19h 13m. Your travel time can differ by up to 1h 02m. Ontario and Vienna are separated by a distance of 6089 mi. This flight may include one or multiple stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Vienna 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 Vienna?

    Currently, October is the cheapest month in which you can book a flight from Ontario to Vienna (average of $407). Flying from Ontario to Vienna in June is currently the most expensive (average of $805). 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

Traveling to a place near Vienna?

Book flights to Vienna if you plan to visit one of these locations
Amstetten
Melk

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