HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Warsaw

$386+ 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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — WAW
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$520
(United Airlines)

One-way from

$386
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$928
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 ($184 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 3, 2025.

This United Airlines deal was found by Cheapflights users on 7/2. 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.
Mon 12/2910:40 amONT - WAW
2 stops17h 10mUnited Airlines
Mon 1/126:30 amWAW - ONT
2 stops22h 47mUnited Airlines
Deal found 7/2$520
This Delta deal was found by Cheapflights users on 7/3. 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.
Thu 7/241:15 pmONT - WAW
2 stops18h 10mDelta
Tue 8/196:05 amWAW - ONT
2 stops25h 15mDelta
Deal found 7/3$563
This British Airways deal was found by Cheapflights users on 7/3. 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.
Mon 11/35:01 pmONT - WAW
2 stops16h 44mBritish Airways
Mon 11/1712:55 pmWAW - ONT
2 stops19h 50mBritish Airways
Deal found 7/3$596
This Lufthansa deal was found by Cheapflights users on 7/2. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/145:05 amONT - WAW
2 stops22h 25mMultiple Airlines
Thu 8/216:25 amWAW - ONT
2 stops20h 12mMultiple Airlines
Deal found 7/2$726
This oojo deal was found by Cheapflights users on 7/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1010:56 pmONT - WAW
1 stop24h 19mLOT
Wed 9/2412:25 pmWAW - ONT
1 stop18h 04mLOT
Deal found 7/2$874

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 July 3, 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

Mon 12/29

10:40 am-12:50 pm

2 stops17h 10m

Warsaw Frederic Chopin

Mon 1/12

6:30 am-8:17 pm

2 stops22h 47m

$520

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Thu 7/24

1:15 pm-4:25 pm

2 stops18h 10m

Warsaw Frederic Chopin

Tue 8/19

6:05 am-10:20 pm

2 stops25h 15m

$563

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Mon 11/3

5:01 pm-6:45 pm

2 stops16h 44m

Warsaw Frederic Chopin

Mon 11/17

12:55 pm-11:45 pm

2 stops19h 50m

$596

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Thu 8/14

5:05 am-12:30 pm

2 stops22h 25m

Warsaw Frederic Chopin

Thu 8/21

6:25 am-5:37 pm

2 stops20h 12m

$726

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Wed 9/10

10:56 pm-8:15 am

1 stop24h 19m

Warsaw Frederic Chopin

Wed 9/24

12:25 pm-9:29 pm

1 stop18h 04m

$874

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 8/17

10:03 am-10:10 am

3 stops39h 07m

$386

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 8/17

12:47 pm-9:10 pm

2 stops23h 23m

$405

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Wed 9/3

7:00 am-10:00 pm

3 stops30h 00m

$416

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Thu 7/17

1:19 pm-10:00 pm

2 stops23h 41m

$557

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Tue 10/21

10:56 pm-8:15 am

1 stop24h 19m

$803

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

Showing 1-10 of 11 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 $1,029). 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 July 3, 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.

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 July 3, 2025.
Read reviews from past customers who have flown Delta, LOT, and United Airlines from Ontario to Warsaw. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

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
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

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
1,092 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

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
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

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.
JetBlue
7.3
Good
2,916 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

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.
Lufthansa
6.8
Okay
7,207 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

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 United Airlines is currently your cheapest option to Warsaw, with prices starting at $520. Additional round-trip tickets that might be worth considering are offered by Delta and British Airways, with the lowest prices starting at $563 and $596, 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 $405 on British Airways. Other airlines that offer cheap prices include United Airlines from $416 and Lufthansa from $557 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 $1,029). 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
San Francisco to Frederic Chopin flights
Ontario to Frederic Chopin flights
Burbank to Frederic Chopin flights
Los Angeles to Krakow flights
San Francisco to Krakow flights
Los Angeles to Modlin flights
San Diego to Frederic Chopin flights
Santa Ana to Frederic Chopin flights
Las Vegas to Frederic Chopin flights
San Jose to Frederic Chopin flights
Los Angeles to Poznan flights
San Diego to Krakow flights
Reno to Frederic Chopin flights
Ontario to Krakow flights
Los Angeles to Gdansk flights
Santa Ana to Krakow flights
Sacramento to Frederic Chopin flights
San Francisco to Poznan flights
Los Angeles to Wroclaw flights
San Diego to Gdansk flights
Santa Ana to Poznan flights
San Francisco to Gdansk flights
Las Vegas to Gdansk flights
San Jose to Krakow flights
San Francisco to Katowice flights
Los Angeles to Katowice flights
San Francisco to Wroclaw flights
San Francisco to Modlin flights
Sacramento to Krakow flights
Las Vegas to Krakow flights
San Jose to Gdansk flights
Oakland to Wroclaw flights
Las Vegas to Wroclaw flights
Medford to Frederic Chopin flights
Oakland to Frederic Chopin flights
San Jose to Wroclaw flights
San Jose to Łódź flights
Long Beach to Frederic Chopin flights
Medford to Katowice flights
Oakland to Katowice flights
Oakland to Poznan flights
Burbank to Poznan flights
San Jose to Katowice flights
San Francisco to Rzeszow 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.