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Prague

$345+ Cheap flights from Ontario (ONT) to Prague (PRG)

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 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PRG
Apr 19 — Apr 261
Sun 4/19
Sun 4/26
1 adult, Economy
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Cheap flight deals from Ontario to Prague

Cheapest flights from Ontario to Prague
Explore the most affordable flight options available from Ontario to Prague. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 20, 2026.

This United Airlines deal was found by Cheapflights users on 3/15. 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 5/41:40 pm
ONT
-
PRG
2 stops17h 25m
United Airlines
Wed 5/132:35 pm
PRG
-
ONT
2 stops17h 24m
United Airlines
Deal found 3/15$628
This United Airlines deal was found by Cheapflights users on 3/16. 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 10/147:00 am
ONT
-
PRG
2 stops16h 55m
United Airlines
Tue 10/277:35 am
PRG
-
ONT
2 stops20h 45m
United Airlines
Deal found 3/16$659
This United Airlines deal was found by Cheapflights users on 3/15. 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 5/51:30 pm
ONT
-
PRG
2 stops19h 20m
United Airlines
Tue 5/192:20 pm
PRG
-
ONT
2 stops17h 39m
United Airlines
Deal found 3/15$671
This United Airlines deal was found by Cheapflights users on 3/16. 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 4/307:00 am
ONT
-
PRG
2 stops16h 55m
United Airlines
Thu 5/79:10 am
PRG
-
ONT
2 stops20h 26m
United Airlines
Deal found 3/16$678
This United Airlines deal was found by Cheapflights users on 3/16. 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 9/61:18 pm
ONT
-
PRG
2 stops23h 02m
United Airlines
Wed 9/2312:30 pm
PRG
-
ONT
2 stops38h 17m
United Airlines
Deal found 3/16$686
This United Airlines deal was found by Cheapflights users on 3/15. 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 4/161:27 pm
ONT
-
PRG
2 stops19h 18m
United Airlines
Thu 4/3011:40 am
PRG
-
ONT
2 stops19h 18m
United Airlines
Deal found 3/15$690
This United Airlines deal was found by Cheapflights users on 3/15. 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 5/181:30 pm
ONT
-
PRG
2 stops19h 10m
United Airlines
Tue 5/266:10 am
PRG
-
ONT
2 stops20h 46m
United Airlines
Deal found 3/15$702
This United Airlines deal was found by Cheapflights users on 3/16. 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 9/67:00 am
ONT
-
PRG
2 stops16h 55m
United Airlines
Tue 9/2211:40 am
PRG
-
ONT
2 stops20h 18m
United Airlines
Deal found 3/16$709
This BusinessClass deal was found by Cheapflights users on 3/16. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/141:00 pm
ONT
-
PRG
2 stops23h 20m
Lufthansa
Tue 10/276:15 am
PRG
-
ONT
2 stops22h 05m
Lufthansa
Deal found 3/16$712
This United Airlines deal was found by Cheapflights users on 3/17. 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 9/71:44 pm
ONT
-
PRG
2 stops18h 56m
United Airlines
Tue 9/226:10 am
PRG
-
ONT
2 stops21h 09m
United Airlines
Deal found 3/17$720
This Delta deal was found by Cheapflights users on 3/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/39:55 am
ONT
-
PRG
2 stops16h 45m
Delta
Tue 11/106:00 am
PRG
-
ONT
2 stops19h 12m
Delta
Deal found 3/20$726

Find flight deals from Ontario to Prague

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Prague (PRG). 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 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$628
(United Airlines)

One-way from

$345
(oojo)

Popular in

June

Cheapest in

February

Average price

$651
Provider with most accurate pricing for Ontario-Václav Havel Prague flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Václav Havel Prague flights.
Search Deals
From Ontario to Václav Havel Prague
Search Deals
One-way flight from Ontario to Václav Havel Prague
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($166 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Prague 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 20, 2026.
Use the filters below to find and compare flights from Ontario to Prague that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioPrague

ONT - PRG

ONTPRG

Ontario

Tue 5/5

1:30 pm-5:50 pm

2 stops19h 20m

Václav Havel Prague

Tue 5/19

2:20 pm-10:59 pm

2 stops17h 39m

$671

OntarioPrague

ONT - PRG

ONTPRG

Ontario

Mon 4/20

1:27 pm-5:40 pm

2 stops19h 13m

Václav Havel Prague

Tue 4/28

11:40 am-9:50 pm

2 stops19h 10m

$690

OntarioPrague

ONT - PRG

ONTPRG

Ontario

Thu 4/16

1:27 pm-5:45 pm

2 stops19h 18m

Václav Havel Prague

Thu 4/30

11:40 am-9:58 pm

2 stops19h 18m

$690

OntarioPrague

ONT - PRG

ONTPRG

Ontario

Sun 9/6

7:00 am-8:55 am

2 stops16h 55m

Václav Havel Prague

Tue 9/22

11:40 am-10:58 pm

2 stops20h 18m

$709

OntarioPrague

ONT - PRG

ONTPRG

Ontario

Mon 9/7

1:44 pm-5:40 pm

2 stops18h 56m

Václav Havel Prague

Tue 9/22

9:10 am-6:11 pm

2 stops18h 01m

$721

OntarioPrague

ONT - PRG

ONTPRG

Ontario

Mon 9/7

1:44 pm-5:40 pm

2 stops18h 56m

Václav Havel Prague

Wed 9/23

2:35 pm-10:58 pm

2 stops17h 23m

$721

OntarioPrague

ONT - PRG

ONTPRG

Ontario

Wed 5/6

1:40 pm-4:05 pm

2 stops17h 25m

Václav Havel Prague

Mon 5/11

11:30 am-10:59 pm

2 stops20h 29m

$728

OntarioPrague

ONT - PRG

ONTPRG

Ontario

Mon 9/7

1:44 pm-5:40 pm

2 stops18h 56m

Václav Havel Prague

Mon 9/21

9:05 am-6:11 pm

2 stops18h 06m

$731

OntarioPrague

ONT - PRG

ONTPRG

Ontario

Sat 5/16

6:59 pm-12:45 pm

2 stops32h 46m

Václav Havel Prague

Tue 6/2

6:10 am-10:37 pm

2 stops25h 27m

$739

OntarioPrague

ONT - PRG

ONTPRG

Ontario

Fri 9/4

8:00 am-5:50 pm

2 stops24h 50m

Václav Havel Prague

Wed 9/23

12:30 pm-5:47 pm

2 stops38h 17m

$797

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

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

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

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

Currently, November is the cheapest month in which you can book a flight from Ontario to Prague (average of $424). Flying from Ontario to Prague in June is currently the most expensive (average of $734). 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 Prague. 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 Prague?

    Departing from Ontario to Prague will take you 31h 10m. The distance between Ontario and Prague is about 5917 mi.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Ontario to Prague (average of $424). Flying from Ontario to Prague in June is currently the most expensive (average of $734). 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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