HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Warsaw

$384+ 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — WAW
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Warsaw with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 September 15, 2025.

Round-trip from

$512
(Travelocity)

One-way from

$384
(Expedia)

Popular in

June

Cheapest in

March

Average price

$644
From Ontario to Warsaw
Search Deals
One-way flight from Ontario to Warsaw
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($178 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 15, 2025.

This United Airlines deal was found by Cheapflights users on 9/14. 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 11/236:05 amONT - WAW
2 stops25h 10mUnited Airlines
Sun 12/76:30 amWAW - ONT
2 stops24h 19mUnited Airlines
Deal found 9/14$523
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sun 10/199:36 amONT - WAW
2 stops18h 59mUnited Airlines
Tue 11/46:30 amWAW - ONT
2 stops20h 04mUnited Airlines
Deal found 9/15$524
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/186:36 pmONT - WAW
2 stops33h 59mUnited Airlines
Sat 11/16:30 amWAW - ONT
2 stops24h 01mUnited Airlines
Deal found 9/14$527
This Delta deal was found by Cheapflights users on 9/14. 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.
Mon 10/207:35 amONT - WAW
2 stops19h 05mDelta
Wed 10/296:05 amWAW - ONT
2 stops23h 15mDelta
Deal found 9/14$528
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/231:53 pmONT - WAW
2 stops19h 22mUnited Airlines
Mon 11/32:35 pmWAW - ONT
2 stops17h 16mUnited Airlines
Deal found 9/15$530
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 10/159:36 amONT - WAW
2 stops18h 59mUnited Airlines
Wed 10/299:30 amWAW - ONT
2 stops21h 21mUnited Airlines
Deal found 9/15$564
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/141:15 pmONT - WAW
2 stops23h 45mUnited Airlines
Tue 10/149:40 amWAW - ONT
2 stops22h 12mUnited Airlines
Deal found 9/14$575
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/101:53 pmONT - WAW
2 stops19h 22mUnited Airlines
Wed 10/299:30 amWAW - ONT
2 stops21h 21mUnited Airlines
Deal found 9/13$582
This British Airways deal was found by Cheapflights users on 9/14. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/132:59 pmONT - WAW
2 stops17h 26mBritish Airways
Fri 11/218:50 amWAW - ONT
2 stops18h 32mBritish Airways
Deal found 9/14$627
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/304:15 pmONT - WAW
2 stops20h 45mUnited Airlines
Sun 10/52:20 pmWAW - ONT
2 stops41h 10mUnited Airlines
Deal found 9/14$659
This Travelocity deal was found by Cheapflights users on 9/14. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/114:47 pmONT - WAW
2 stops16h 58mBritish Airways
Wed 11/198:50 amWAW - ONT
2 stops18h 31mBritish Airways
Deal found 9/14$725
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/169:36 amONT - WAW
2 stops18h 59mUnited Airlines
Thu 10/306:30 amWAW - ONT
2 stops22h 14mUnited Airlines
Deal found 9/15$747

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 September 15, 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

Sat 11/29

6:38 pm-4:15 pm

2 stops36h 37m

Warsaw Frederic Chopin

Sat 12/13

6:30 am-5:37 pm

2 stops20h 07m

$523

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Wed 12/31

10:42 am-12:55 pm

2 stops17h 13m

Warsaw Frederic Chopin

Sat 1/10

2:35 pm-10:53 pm

2 stops17h 18m

$524

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 10/19

9:36 am-1:35 pm

2 stops18h 59m

Warsaw Frederic Chopin

Wed 11/12

2:35 pm-10:51 pm

2 stops17h 16m

$524

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 10/19

9:36 am-1:35 pm

2 stops18h 59m

Warsaw Frederic Chopin

Tue 11/4

6:30 am-5:34 pm

2 stops20h 04m

$524

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Mon 1/12

7:00 am-1:50 pm

2 stops21h 50m

Warsaw Frederic Chopin

Mon 1/26

2:35 pm-10:53 pm

2 stops17h 18m

$525

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sat 3/7

7:15 pm-4:15 pm

2 stops36h 00m

Warsaw Frederic Chopin

Sat 3/21

6:30 am-6:00 pm

2 stops19h 30m

$525

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sat 10/18

6:36 pm-1:35 pm

2 stops33h 59m

Warsaw Frederic Chopin

Sat 11/1

6:30 am-10:31 pm

2 stops24h 01m

$527

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Mon 10/20

7:35 am-11:40 am

2 stops19h 05m

Warsaw Frederic Chopin

Wed 10/29

6:05 am-9:20 pm

2 stops23h 15m

$528

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Wed 10/8

6:36 pm-10:00 pm

2 stops18h 24m

Warsaw Frederic Chopin

Wed 10/15

6:40 am-5:40 pm

2 stops20h 00m

$575

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Fri 10/10

1:53 pm-6:15 pm

2 stops19h 22m

Warsaw Frederic Chopin

Wed 10/29

9:30 am-10:51 pm

2 stops21h 21m

$582

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 23 results
1
2
3

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, January is the cheapest month in which you can book a flight from Ontario to Warsaw (average of $576). Flying from Ontario to Warsaw in June is currently the most expensive (average of $1,019). 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 September 15, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 12% 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 36h 37m. United Airlines provides one of the quickest options available for as low as $523. 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, January is the cheapest month in which you can book a flight from Ontario to Warsaw (average of $576). Flying from Ontario to Warsaw in June is currently the most expensive (average of $1,019). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Warsaw

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Frederic Chopin flights
Ontario to Frederic Chopin flights
San Francisco to Frederic Chopin flights
Los Angeles to Modlin flights
Las Vegas to Frederic Chopin flights
Santa Ana to Frederic Chopin flights
Los Angeles to Krakow flights
San Diego to Frederic Chopin flights
Sacramento to Frederic Chopin flights
Ontario to Krakow flights
San Diego to Krakow flights
San Francisco to Modlin flights
Los Angeles to Katowice flights
San Jose to Frederic Chopin flights
San Francisco to Krakow flights
Las Vegas to Krakow flights
San Diego to Gdansk flights
Los Angeles to Gdansk flights
Los Angeles to Poznan flights
San Francisco to Wroclaw flights
Burbank to Frederic Chopin flights
San Jose to Krakow flights
Los Angeles to Wroclaw flights
Santa Ana to Krakow flights
San Francisco to Rzeszow flights
Oakland to Frederic Chopin flights
San Francisco to Katowice flights
Long Beach to Frederic Chopin flights
San Francisco to Poznan flights
San Francisco to Gdansk flights
Sacramento to Krakow flights
San Jose to Gdansk flights
Oakland to Krakow flights
Reno to Frederic Chopin flights
Las Vegas to Gdansk flights
Las Vegas to Poznan flights
Medford to Frederic Chopin flights
San Jose to Poznan flights
Santa Ana to Poznan flights
San Diego to Rzeszow flights
San Jose to Rzeszow flights
San Jose to Łódź flights
Oakland to Wroclaw flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.