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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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — WAW
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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 30, 2025.

This United Airlines deal was found by Cheapflights users on 10/30. 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 11/246:38 pmONT - WAW
2 stops18h 52mUnited Airlines
Wed 12/39:30 amWAW - ONT
3 stops22h 19mUnited Airlines
Deal found 10/30$497
This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1812:16 pmONT - WAW
2 stops18h 49mDelta
Thu 12/46:05 amWAW - ONT
2 stops20h 03mDelta
Deal found 10/30$504
This United deal was found by Cheapflights users on 10/28. 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.
Wed 11/55:05 amONT - WAW
2 stops23h 35mMultiple Airlines
Thu 11/276:30 amWAW - ONT
2 stops20h 04mMultiple Airlines
Deal found 10/28$509
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/157:00 amONT - WAW
2 stops25h 15mUnited Airlines
Fri 11/212:20 pmWAW - ONT
2 stops41h 31mUnited Airlines
Deal found 10/27$524
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Sun 11/306:00 amONT - WAW
2 stops25h 30mUnited Airlines
Sun 12/146:30 amWAW - ONT
3 stops25h 19mUnited Airlines
Deal found 10/30$700
This Booking.com deal was found by Cheapflights users on 10/28. 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.
Wed 10/294:49 pmONT - WAW
2 stops18h 01mBritish Airways
Wed 11/58:50 amWAW - ONT
2 stops18h 31mBritish Airways
Deal found 10/28$782
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Sat 11/299:35 pmONT - WAW
2 stops33h 55mUnited Airlines
Sat 12/136:30 amWAW - ONT
2 stops38h 48mUnited Airlines
Deal found 10/29$789
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Sat 11/226:38 pmONT - WAW
2 stops36h 52mUnited Airlines
Sat 12/66:30 amWAW - ONT
2 stops20h 07mUnited Airlines
Deal found 10/30$995
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Sun 12/145:05 amONT - WAW
2 stops27h 45mUnited Airlines
Sun 12/216:30 amWAW - ONT
2 stops24h 55mUnited Airlines
Deal found 10/30$1,010
This United Airlines deal was found by Cheapflights users on 10/28. 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 12/175:05 amONT - WAW
2 stops23h 35mUnited Airlines
Wed 12/319:30 amWAW - ONT
2 stops45h 55mUnited Airlines
Deal found 10/28$1,199
This Booking.com deal was found by Cheapflights users on 10/28. 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 11/154:47 pmONT - WAW
2 stops17h 18mBritish Airways
Sat 11/228:50 amWAW - ONT
2 stops19h 15mBritish Airways
Deal found 10/28$1,226

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 30, 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
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 ($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 30, 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 3/25

3:09 pm-6:50 pm

2 stops19h 41m

Warsaw Frederic Chopin

Wed 4/8

8:55 am-5:45 pm

2 stops17h 50m

$490

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Mon 11/24

6:38 pm-10:30 pm

2 stops18h 52m

Warsaw Frederic Chopin

Wed 12/3

6:30 am-5:37 pm

2 stops20h 07m

$497

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Mon 11/24

6:38 pm-10:30 pm

2 stops18h 52m

Warsaw Frederic Chopin

Thu 12/4

9:30 am-10:49 pm

2 stops22h 19m

$497

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Tue 3/24

1:49 pm-10:30 pm

2 stops24h 41m

Warsaw Frederic Chopin

Tue 4/7

6:40 am-8:35 pm

2 stops22h 55m

$498

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sat 3/28

1:45 pm-3:20 pm

2 stops41h 35m

Warsaw Frederic Chopin

Thu 4/9

2:15 pm-6:00 pm

2 stops36h 45m

$498

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Tue 3/24

5:40 am-10:30 pm

2 stops32h 50m

Warsaw Frederic Chopin

Wed 4/8

6:40 am-8:17 pm

2 stops22h 37m

$498

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Wed 3/25

1:45 pm-10:30 pm

2 stops24h 45m

Warsaw Frederic Chopin

Tue 4/7

2:15 pm-6:00 pm

2 stops36h 45m

$498

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Wed 3/25

5:40 am-10:30 pm

2 stops32h 50m

Warsaw Frederic Chopin

Thu 4/9

2:15 pm-12:19 pm

2 stops31h 04m

$498

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 11/9

6:00 am-4:30 pm

2 stops25h 30m

$400

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Tue 11/18

6:00 am-4:15 pm

2 stops25h 15m

$400

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 20 results
1
2

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 30, 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 18h 52m. British Airways provides one of the quickest options available for as low as $497. 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.

  • 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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