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$372+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — WAW
Jan 1 — Jan 81
Thu 1/1
Thu 1/8
1 adult, Economy
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Cheap 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 December 2, 2025.

This United Airlines deal was found by Cheapflights users on 12/1. 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 12/26:41 pmONT - WAW
2 stops18h 49mUnited Airlines
Tue 12/166:30 amWAW - ONT
2 stops25h 19mUnited Airlines
Deal found 12/1$496
This United Airlines deal was found by Cheapflights users on 11/30. 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.
Mon 12/81:34 pmONT - WAW
2 stops17h 56mUnited Airlines
Thu 4/99:40 amWAW - ONT
2 stops20h 06mUnited Airlines
Deal found 11/30$497
This United Airlines deal was found by Cheapflights users on 12/2. 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 12/36:41 pmONT - WAW
2 stops18h 49mUnited Airlines
Tue 12/161:35 pmWAW - ONT
2 stops18h 14mUnited Airlines
Deal found 12/2$498
This oojo deal was found by Cheapflights users on 11/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1012:46 pmONT - WAW
2 stops21h 04mBritish Airways
Sat 2/288:50 amWAW - ONT
2 stops18h 49mBritish Airways
Deal found 11/30$539
This Delta deal was found by Cheapflights users on 12/2. 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.
Fri 12/512:12 pmONT - WAW
2 stops18h 53mDelta
Fri 12/126:05 amWAW - ONT
2 stops19h 04mDelta
Deal found 12/2$551
This United Airlines deal was found by Cheapflights users on 11/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/309:35 pmONT - WAW
2 stops31h 15mUnited Airlines
Sun 12/71:35 pmWAW - ONT
2 stops37h 02mUnited Airlines
Deal found 11/29$568
This United Airlines deal was found by Cheapflights users on 11/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:00 amONT - WAW
2 stops25h 30mUnited Airlines
Thu 12/186:30 amWAW - ONT
2 stops24h 55mUnited Airlines
Deal found 11/29$853
This United Airlines deal was found by Cheapflights users on 12/2. 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 12/41:34 pmONT - WAW
2 stops39h 16mUnited Airlines
Wed 12/176:30 amWAW - ONT
2 stops24h 19mUnited Airlines
Deal found 12/2$979
This oojo deal was found by Cheapflights users on 11/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/112:56 pmONT - WAW
2 stops17h 29mBritish Airways
Fri 4/1011:50 amWAW - ONT
2 stops38h 56mBritish Airways
Deal found 11/30$1,132
This oojo deal was found by Cheapflights users on 11/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/274:47 pmONT - WAW
2 stops17h 18mBritish Airways
Fri 1/98:50 amWAW - ONT
2 stops18h 55mBritish Airways
Deal found 11/30$1,225

Find 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 December 2, 2025.

Round-trip from

$423
(Flysmarter)

One-way from

$372
(Mytrip)

Popular in

June

Cheapest in

November

Average price

$718
From Ontario to Warsaw
Search Deals
One-way flight from Ontario to Warsaw
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($185 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 2, 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

Tue 3/31

10:56 am-5:30 pm

2 stops21h 34m

Warsaw Frederic Chopin

Tue 4/14

1:00 pm-5:45 pm

2 stops37h 45m

$426

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Tue 1/20

4:45 pm-9:40 pm

2 stops19h 55m

Warsaw Frederic Chopin

Tue 2/3

8:50 am-6:45 pm

2 stops18h 55m

$426

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Wed 1/21

4:45 pm-6:50 pm

2 stops17h 05m

Warsaw Frederic Chopin

Wed 2/4

7:20 am-10:48 pm

2 stops24h 28m

$437

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Fri 1/23

4:45 pm-9:45 pm

2 stops20h 00m

Warsaw Frederic Chopin

Fri 2/6

8:50 am-6:45 pm

2 stops18h 55m

$454

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 1/18

4:45 pm-9:30 pm

2 stops19h 45m

Warsaw Frederic Chopin

Sun 1/25

6:55 am-10:13 pm

2 stops24h 18m

$465

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 1/11

11:59 pm-12:20 pm

2 stops27h 21m

Warsaw Frederic Chopin

Sun 1/18

7:20 pm-10:48 pm

2 stops36h 28m

$470

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Mon 1/19

7:30 am-4:20 pm

2 stops23h 50m

Warsaw Frederic Chopin

Wed 2/4

6:35 am-10:44 pm

2 stops25h 09m

$484

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sat 1/24

10:30 pm-12:05 pm

2 stops28h 35m

Warsaw Frederic Chopin

Thu 2/12

6:35 am-9:05 pm

2 stops23h 30m

$484

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Tue 1/20

6:00 am-4:30 pm

2 stops25h 30m

Warsaw Frederic Chopin

Wed 2/4

6:35 am-4:15 pm

2 stops18h 40m

$484

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sat 1/24

1:10 pm-4:30 pm

2 stops42h 20m

Warsaw Frederic Chopin

Wed 2/11

12:45 pm-4:02 pm

2 stops36h 17m

$485

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Showing 1-10 of 21 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, October is the cheapest month in which you can book a flight from Ontario to Warsaw (average of $433). 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 December 2, 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 21h 34m. British Airways provides one of the quickest options available for as low as $426. Ontario and Warsaw are separated by a distance of 5971 mi.

  • 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, October is the cheapest month in which you can book a flight from Ontario to Warsaw (average of $433). 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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