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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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — WAW
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
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 November 6, 2025.

This Expedia deal was found by Cheapflights users on 11/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/304:47 pmONT - WAW
2 stops16h 58mBritish Airways
Tue 1/138:50 amWAW - ONT
2 stops18h 55mBritish Airways
Deal found 11/6$489
This United Airlines deal was found by Cheapflights users on 11/5. 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 12/2910:42 amONT - WAW
2 stops17h 13mUnited Airlines
Tue 1/136:30 amWAW - ONT
2 stops24h 28mUnited Airlines
Deal found 11/5$496
This United Airlines deal was found by Cheapflights users on 11/6. 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 11/196:00 amONT - WAW
2 stops25h 15mUnited Airlines
Tue 11/251:35 pmWAW - ONT
2 stops42h 16mUnited Airlines
Deal found 11/6$507
This United Airlines deal was found by Cheapflights users on 11/5. 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 11/51:45 pmONT - WAW
2 stops18h 55mUnited Airlines
Thu 11/136:30 amWAW - ONT
2 stops20h 04mUnited Airlines
Deal found 11/5$508
This United Airlines deal was found by Cheapflights users on 11/5. 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 12/2810:42 amONT - WAW
2 stops26h 48mUnited Airlines
Sun 1/112:30 pmWAW - ONT
2 stops41h 23mUnited Airlines
Deal found 11/5$515
This United Airlines deal was found by Cheapflights users on 11/4. 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 11/105:05 amONT - WAW
2 stops23h 45mUnited Airlines
Mon 11/172:35 pmWAW - ONT
2 stops37h 01mUnited Airlines
Deal found 11/4$528
This United Airlines deal was found by Cheapflights users on 11/5. 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 11/136:38 pmONT - WAW
2 stops18h 52mUnited Airlines
Fri 11/212:20 pmWAW - ONT
2 stops17h 31mUnited Airlines
Deal found 11/5$543
This Delta deal was found by Cheapflights users on 11/5. 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 11/510:00 pmONT - WAW
2 stops29h 00mDelta
Thu 11/136:05 amWAW - ONT
2 stops25h 59mDelta
Deal found 11/5$589
This United Airlines deal was found by Cheapflights users on 11/5. 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 11/161:30 pmONT - WAW
2 stops18h 00mUnited Airlines
Fri 11/219:20 amWAW - ONT
2 stops22h 31mUnited Airlines
Deal found 11/5$607
This United Airlines deal was found by Cheapflights users on 11/5. 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 11/91:29 pmONT - WAW
2 stops18h 01mUnited Airlines
Tue 11/116:05 amWAW - ONT
2 stops23h 39mUnited Airlines
Deal found 11/5$609
This United deal was found by Cheapflights users on 11/6. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/275:05 amONT - WAW
2 stops27h 35mMultiple Airlines
Sat 1/102:35 pmWAW - ONT
2 stops17h 18mMultiple Airlines
Deal found 11/6$688
This United Airlines deal was found by Cheapflights users on 11/4. 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 12/76:00 amONT - WAW
2 stops25h 30mUnited Airlines
Mon 12/159:15 amWAW - ONT
3 stops22h 34mUnited Airlines
Deal found 11/4$699

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 November 6, 2025.

Round-trip from

$489
(Expedia)

One-way from

$400
(United Airlines)

Popular in

June

Cheapest in

March

Average price

$553
From Ontario to Warsaw
Search Deals
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).
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 November 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 November 6, 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 12/30

10:42 am-12:55 pm

2 stops17h 13m

Warsaw Frederic Chopin

Tue 1/13

6:30 am-9:58 pm

2 stops24h 28m

$496

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Tue 12/30

10:42 am-12:55 pm

2 stops17h 13m

Warsaw Frederic Chopin

Thu 1/15

9:30 am-10:53 pm

2 stops22h 23m

$496

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Mon 12/29

10:42 am-12:55 pm

2 stops17h 13m

Warsaw Frederic Chopin

Mon 1/12

2:35 pm-10:53 pm

2 stops17h 18m

$496

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 3/8

1:45 pm-4:30 pm

2 stops18h 45m

Warsaw Frederic Chopin

Mon 3/16

9:15 am-10:15 pm

2 stops21h 00m

$497

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Thu 3/5

1:45 pm-4:30 pm

2 stops17h 45m

Warsaw Frederic Chopin

Thu 3/19

9:30 am-10:35 pm

2 stops21h 05m

$500

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Wed 11/19

6:00 am-4:15 pm

2 stops25h 15m

Warsaw Frederic Chopin

Tue 11/25

1:35 pm-10:51 pm

2 stops42h 16m

$507

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Mon 4/6

1:33 pm-6:20 pm

2 stops19h 47m

Warsaw Frederic Chopin

Mon 4/20

2:15 pm-11:06 pm

2 stops17h 51m

$509

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 4/5

1:33 pm-6:20 pm

2 stops19h 47m

Warsaw Frederic Chopin

Sun 4/19

1:15 pm-10:26 pm

2 stops18h 11m

$515

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sat 1/10

1:24 pm-5:50 pm

2 stops43h 26m

Warsaw Frederic Chopin

Sat 1/17

2:35 pm-9:58 pm

2 stops40h 23m

$532

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 11/16

1:30 pm-4:30 pm

2 stops18h 00m

Warsaw Frederic Chopin

Wed 11/19

9:30 am-10:51 pm

2 stops22h 21m

$607

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

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, 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 November 6, 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 13m. United Airlines provides one of the quickest options available for as low as $496. 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, 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

Browse thousands of different options on Cheapflights for your next trip

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