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$400+ Cheap flights from Ontario (ONT) to Warsaw

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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — WAW
Nov 25 — Dec 21
Tue 11/25
Tue 12/2
1 adult, Economy
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Find flight deals from Ontario to Warsaw

Cheapest flights from Ontario to Warsaw
Explore the most affordable flight options available from Ontario to Warsaw. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 26, 2025.

This United Airlines deal was found by Cheapflights users on 10/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/247:02 amONT - WAW
2 stops29h 58mUnited Airlines
Fri 11/146:40 amWAW - ONT
2 stops25h 11mUnited Airlines
Deal found 10/23$543
This United Airlines deal was found by Cheapflights users on 10/25. 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 10/266:00 amONT - WAW
2 stops26h 30mUnited Airlines
Sun 11/25:05 amWAW - ONT
2 stops20h 29mUnited Airlines
Deal found 10/25$545
This United Airlines deal was found by Cheapflights users on 10/24. 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 10/249:36 amONT - WAW
2 stops23h 39mUnited Airlines
Fri 10/319:20 amWAW - ONT
2 stops21h 11mUnited Airlines
Deal found 10/24$611
This United Airlines deal was found by Cheapflights users on 10/25. 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 11/21:29 pmONT - WAW
2 stops18h 01mUnited Airlines
Sat 11/81:35 pmWAW - ONT
2 stops18h 16mUnited Airlines
Deal found 10/25$639
This American Airlines deal was found by Cheapflights users on 10/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2912:47 pmONT - WAW
2 stops22h 03mAmerican Airlines
Tue 12/98:50 amWAW - ONT
2 stops18h 27mAmerican Airlines
Deal found 10/26$680
This United Airlines deal was found by Cheapflights users on 10/24. 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 10/241:53 pmONT - WAW
2 stops23h 07mUnited Airlines
Sat 11/16:05 amWAW - ONT
2 stops22h 39mUnited Airlines
Deal found 10/24$761
This United Airlines deal was found by Cheapflights users on 10/24. 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 10/256:36 pmONT - WAW
2 stops37h 54mUnited Airlines
Sat 11/12:35 pmWAW - ONT
2 stops40h 14mUnited Airlines
Deal found 10/24$768
This United Airlines deal was found by Cheapflights users on 10/26. 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 11/231:40 pmONT - WAW
2 stops41h 50mUnited Airlines
Tue 12/22:35 pmWAW - ONT
2 stops41h 14mUnited Airlines
Deal found 10/26$801
This United Airlines deal was found by Cheapflights users on 10/26. 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 10/277:00 amONT - WAW
2 stops26h 15mUnited Airlines
Sun 11/25:30 amWAW - ONT
2 stops25h 01mUnited Airlines
Deal found 10/26$840
This American Airlines deal was found by Cheapflights users on 10/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2610:57 amONT - WAW
2 stops20h 33mAmerican Airlines
Sun 11/28:50 amWAW - ONT
2 stops18h 32mAmerican Airlines
Deal found 10/25$951
This Booking.com deal was found by Cheapflights users on 10/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2510:57 amONT - WAW
2 stops16h 58mBritish Airways
Sat 11/18:50 amWAW - ONT
2 stops18h 02mBritish Airways
Deal found 10/24$984

Cheap flight deals from Ontario to Warsaw

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Warsaw (WA1). 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 October 26, 2025.

Round-trip from

$490
(Expedia)

One-way from

$400
(United Airlines)

Popular in

June

Cheapest in

March

Average price

$563
From Ontario to Warsaw
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One-way flight from Ontario to Warsaw
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($188 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Warsaw 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 October 26, 2025.
Use the filters below to find and compare flights from Ontario to Warsaw that are best for you.

Fly from

Ontario

Fly to

Warsaw

Route

Depart

Return

Price

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Wed 2/25

1:45 pm-4:30 pm

2 stops17h 45m

Warsaw Frederic Chopin

Wed 3/11

9:30 am-10:37 pm

2 stops21h 07m

$498

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sat 4/18

10:40 am-4:15 pm

2 stops20h 35m

Warsaw Frederic Chopin

Thu 5/7

6:40 am-8:35 pm

2 stops22h 55m

$501

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sat 1/10

5:05 am-1:40 pm

2 stops23h 35m

Warsaw Frederic Chopin

Sat 1/17

1:35 pm-10:53 pm

2 stops18h 18m

$596

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sat 1/31

4:49 pm-7:05 pm

2 stops17h 16m

Warsaw Frederic Chopin

Tue 3/3

8:50 am-5:51 pm

2 stops18h 01m

$610

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Mon 1/26

4:49 pm-6:45 pm

2 stops16h 56m

Warsaw Frederic Chopin

Mon 2/9

8:50 am-6:45 pm

2 stops18h 55m

$615

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Fri 3/27

6:00 am-10:30 pm

2 stops32h 30m

Warsaw Frederic Chopin

Tue 3/31

9:40 am-10:45 pm

2 stops22h 05m

$623

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Fri 3/27

5:02 pm-9:45 pm

2 stops20h 43m

Warsaw Frederic Chopin

Fri 4/10

8:55 am-5:45 pm

2 stops17h 50m

$665

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 11/23

1:40 pm-4:30 pm

2 stops41h 50m

Warsaw Frederic Chopin

Tue 12/2

2:35 pm-10:49 pm

2 stops41h 14m

$801

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sat 11/22

6:38 pm-4:30 pm

2 stops36h 52m

Warsaw Frederic Chopin

Tue 12/2

2:35 pm-10:49 pm

2 stops41h 14m

$1,011

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Fri 12/26

10:42 am-12:55 pm

2 stops17h 13m

Warsaw Frederic Chopin

Sat 1/10

2:35 pm-10:53 pm

2 stops17h 18m

$1,056

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Showing 1-10 of 22 results
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Best time to book a flight from Ontario to Warsaw

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

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

Currently, March is the cheapest month in which you can book a flight from Ontario to Warsaw (average of $441). Flying from Ontario to Warsaw in June is currently the most expensive (average of $699). 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.

What is the cheapest time of day to fly from ONT to WAW?

Find hourly flight availability from Ontario to Warsaw. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 26, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 54% on flights from Ontario to Warsaw by exploring options for tickets at noon.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Warsaw. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Warsaw?

    If you book a flight to Warsaw from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario. There are 0 flights from Ontario to Warsaw per day from 0 different airlines.

  • How long is the flight from Ontario to Warsaw?

    A quick flight from Ontario to Warsaw can take about 17h 16m. United Airlines provides one of the quickest options available for as low as $610. Ontario and Warsaw are separated by a distance of 5971 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Ontario to Warsaw one-way?

    One-way options have recently been found by users for as low as $400 on United Airlines. Other airlines that offer cheap prices include British Airways from $401 and Delta from $404 one-way.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Ontario to Warsaw (average of $441). Flying from Ontario to Warsaw in June is currently the most expensive (average of $699). 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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