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$416+ 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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — WAW
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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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 June 12, 2025.

Round-trip from

$482
(British Airways)

One-way from

$416
(United Airlines)

Popular in

June

Cheapest in

March

Average price

$961
From Ontario to Warsaw
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One-way flight from Ontario to Warsaw
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Highest demand for flights based on searches. 21% potential increase in price ($183 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 June 12, 2025.

This British Airways deal was found by Cheapflights users on 6/10. 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.
Fri 11/78:46 amONT - WAW
2 stops18h 04mBritish Airways
Fri 11/218:50 amWAW - ONT
2 stops17h 59mBritish Airways
Deal found 6/10$482
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Mon 10/275:02 pmONT - WAW
2 stops17h 43mAmerican Airlines
Tue 11/48:50 amWAW - ONT
2 stops17h 59mAmerican Airlines
Deal found 6/11$487
This KLM deal was found by Cheapflights users on 6/11. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/287:00 amONT - WAW
2 stops21h 00mKLM
Wed 11/57:40 pmWAW - ONT
2 stops29h 34mKLM
Deal found 6/11$504
This United Airlines deal was found by Cheapflights users on 6/11. 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 10/275:40 amONT - WAW
2 stops26h 50mUnited Airlines
Wed 11/52:35 pmWAW - ONT
2 stops35h 59mUnited Airlines
Deal found 6/11$510
This Delta deal was found by Cheapflights users on 6/11. 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 10/2912:00 pmONT - WAW
2 stops40h 00mDelta
Tue 11/412:45 pmWAW - ONT
2 stops44h 01mDelta
Deal found 6/11$512
This Trip.com deal was found by Cheapflights users on 6/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/121:34 pmONT - WAW
2 stops24h 36mMultiple Airlines
Thu 8/2110:30 pmWAW - ONT
2 stops31h 13mMultiple Airlines
Deal found 6/11$699
This oojo deal was found by Cheapflights users on 6/11. 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.
Tue 9/910:56 pmONT - WAW
1 stop24h 19mLOT
Tue 9/2312:25 pmWAW - ONT
1 stop18h 04mLOT
Deal found 6/11$863

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 June 12, 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

Fri 11/7

8:46 am-11:50 am

2 stops18h 04m

Warsaw Frederic Chopin

Fri 11/21

8:50 am-5:49 pm

2 stops17h 59m

$482

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Mon 10/27

5:02 pm-6:45 pm

2 stops17h 43m

Warsaw Frederic Chopin

Tue 11/4

8:50 am-5:49 pm

2 stops17h 59m

$487

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Tue 10/28

7:00 am-12:00 pm

2 stops21h 00m

Warsaw Frederic Chopin

Wed 11/5

7:40 pm-4:14 pm

2 stops29h 34m

$504

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Mon 10/27

5:40 am-4:30 pm

2 stops26h 50m

Warsaw Frederic Chopin

Wed 11/5

2:35 pm-5:34 pm

2 stops35h 59m

$510

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Wed 10/29

12:00 pm-12:00 pm

2 stops40h 00m

Warsaw Frederic Chopin

Tue 11/4

12:45 pm-11:46 pm

2 stops44h 01m

$512

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Tue 8/12

1:34 pm-11:10 pm

2 stops24h 36m

Warsaw Frederic Chopin

Thu 8/21

10:30 pm-8:43 pm

2 stops31h 13m

$699

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Tue 9/9

10:56 pm-8:15 am

1 stop24h 19m

Warsaw Frederic Chopin

Tue 9/23

12:25 pm-9:29 pm

1 stop18h 04m

$863

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 8/10

7:00 am-12:30 pm

2 stops20h 30m

$416

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Tue 9/30

4:45 pm-9:15 pm

2 stops19h 30m

$501

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Thu 10/2

10:55 am-12:15 pm

2 stops16h 20m

$648

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 12 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, 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 $1,052). 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 June 12, 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.

Rainfall in Warsaw by month

Plan your trip to Warsaw by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Warsaw ranges from 0.8 - 2.8 inches per month. July is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Warsaw when rainfall is around 0.8 in.

Temperature in Warsaw by month

Plan your trip to Warsaw by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Warsaw, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Warsaw

Get insights into the airlines that provide service to Warsaw. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Warsaw. Reviews last updated June 12, 2025.
To help decide which airline to fly from Ontario to Warsaw, see what other customers have to say about Delta, KLM and LOT. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
LOT
7.6
Good
1,077 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines flying from Ontario to Warsaw round-trip?

    Flying on British Airways is currently your cheapest option to Warsaw, with prices starting at $482. Additional round-trip tickets that might be worth considering are offered by American Airlines and KLM, with the lowest prices starting at $487 and $504, respectively.

  • 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 $416 on United Airlines. Other airlines that offer cheap prices include British Airways from $501 and American Airlines from $648 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, 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 $1,052). 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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