HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$625+ Cheap flights from Southeast Europe to Ontario (ONT)

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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
ATH — ONT
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Southeast Europe to Ontario 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 Southeast Europe to Ontario

Keep the following information in mind while searching for Southeast Europe to Ontario flight deals. Data was last updated February 20, 2025.

Round-trip from

$781
(United Airlines)

One-way from

$625
(Air Serbia)
From Southeast Europe to Ontario
Search Deals
One-way flight from Southeast Europe to Ontario
Search Deals

Find flight deals from Southeast Europe to Ontario

Cheapest flights from Southeast Europe to Ontario
Explore the most affordable flight options available from Southeast Europe to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

This United Airlines deal was found by Cheapflights users on 2/20. 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 4/76:10 amBEG - ONT
2 stops23h 32mUnited Airlines
Sun 4/206:10 amONT - BEG
2 stops22h 00mUnited Airlines
Deal found 2/20$781
This Delta deal was found by Cheapflights users on 2/20. 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 4/76:00 amBEG - ONT
2 stops25h 23mDelta
Wed 4/165:15 pmONT - BEG
2 stops20h 40mDelta
Deal found 2/20$804
This United Airlines deal was found by Cheapflights users on 2/20. 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 4/246:05 amOTP - ONT
2 stops24h 37mUnited Airlines
Mon 5/56:00 amONT - OTP
2 stops33h 00mUnited Airlines
Deal found 2/20$822
This United Airlines deal was found by Cheapflights users on 2/20. 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 3/247:00 amATH - ONT
2 stops22h 10mUnited Airlines
Wed 4/26:00 amONT - ATH
2 stops17h 55mUnited Airlines
Deal found 2/20$831
This SmartFares deal was found by Cheapflights users on 2/20. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/143:05 pmZAG - ONT
2 stops33h 29mKLM
Fri 4/46:00 amONT - ZAG
2 stops31h 45mKLM
Deal found 2/20$857
This KLM deal was found by Cheapflights users on 2/20. 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.
Sat 5/1010:30 amATH - ONT
1 stop19h 12mKLM
Fri 5/1610:59 pmONT - ATH
1 stop25h 56mKLM
Deal found 2/20$1,120
This United Airlines deal was found by Cheapflights users on 2/20. 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 3/118:35 amZAG - ONT
2 stops19h 35mUnited Airlines
Thu 4/31:35 pmONT - ZAG
2 stops15h 40mUnited Airlines
Deal found 2/20$1,127
This Qatar Airways deal was found by Cheapflights users on 2/20. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/15:10 pmOTP - ONT
2 stops35h 07mQatar Airways
Wed 10/153:00 pmONT - OTP
2 stops37h 00mQatar Airways
Deal found 2/20$1,594
This StudentUniverse deal was found by Cheapflights users on 2/20. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/21:15 pmATH - ONT
2 stops39h 04mQatar Airways
Mon 4/2111:33 amONT - ATH
2 stops38h 52mQatar Airways
Deal found 2/20$1,680
This British Airways deal was found by Cheapflights users on 2/20. 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.
Wed 4/231:20 pmZAG - ONT
2 stops19h 30mMultiple Airlines
Mon 5/510:51 amONT - ZAG
2 stops22h 54mMultiple Airlines
Deal found 2/20$1,886
This British Airways deal was found by Cheapflights users on 2/20. 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 2/278:55 pmZAG - ONT
2 stops30h 40mBritish Airways
Wed 3/124:30 pmONT - ZAG
2 stops19h 35mBritish Airways
Deal found 2/20$2,546
This British Airways deal was found by Cheapflights users on 2/19. 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.
Tue 3/116:05 pmSOF - ONT
2 stops33h 56mBritish Airways
Tue 3/2510:57 amONT - SOF
2 stops18h 13mBritish Airways
Deal found 2/19$2,713

Find flights from Southeast Europe to Ontario within your budget

Customize your flight search to find flights from Southeast Europe to Ontario 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 February 20, 2025.

Fly from

Southeast Europe

Fly to

Ontario

Route

Depart

Return

Price

BelgradeOntario

BEG - ONT

BEGONT

Belgrade Nikola Tesla

Mon 4/7

6:10 am-8:42 pm

2 stops23h 32m

Ontario

Sun 4/20

6:10 am-1:10 pm

2 stops22h 00m

$781

BelgradeOntario

BEG - ONT

BEGONT

Belgrade Nikola Tesla

Mon 4/7

6:00 am-10:23 pm

2 stops25h 23m

Ontario

Wed 4/16

5:15 pm-10:55 pm

2 stops20h 40m

$804

BucharestOntario

OTP - ONT

OTPONT

Bucharest Otopeni Intl

Thu 4/24

6:05 am-8:42 pm

2 stops24h 37m

Ontario

Mon 5/5

6:00 am-1:00 am

2 stops33h 00m

$822

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Mon 3/24

7:00 am-8:10 pm

2 stops22h 10m

Ontario

Wed 4/2

6:00 am-9:55 am

2 stops17h 55m

$831

ZagrebOntario

ZAG - ONT

ZAGONT

Zagreb Franjo Tuđman

Fri 3/14

3:05 pm-4:34 pm

2 stops33h 29m

Ontario

Fri 4/4

6:00 am-10:45 pm

2 stops31h 45m

$857

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sat 5/10

10:30 am-7:42 pm

1 stop19h 12m

Ontario

Fri 5/16

10:59 pm-10:55 am

1 stop25h 56m

$1,120

ZagrebOntario

ZAG - ONT

ZAGONT

Zagreb Franjo Tuđman

Tue 3/11

8:35 am-8:10 pm

2 stops19h 35m

Ontario

Thu 4/3

1:35 pm-2:15 pm

2 stops15h 40m

$1,127

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sun 3/2

1:15 pm-6:19 pm

2 stops39h 04m

Ontario

Mon 4/21

11:33 am-12:25 pm

2 stops38h 52m

$1,680

BucharestOntario

OTP - ONT

OTPONT

Bucharest Otopeni Intl

Sun 4/6

5:10 pm-6:23 pm

2 stops35h 13m

Ontario

Sat 4/19

2:44 pm-7:45 am

2 stops31h 01m

$1,723

ZagrebOntario

ZAG - ONT

ZAGONT

Zagreb Franjo Tuđman

Wed 4/23

1:20 pm-11:50 pm

2 stops19h 30m

Ontario

Mon 5/5

10:51 am-6:45 pm

2 stops22h 54m

$1,886

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 37 results
1
2
3
4

Best time to book a flight from Southeast Europe to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Southeast Europe 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.

Travel insights for flights from Southeast Europe to Ontario

Get recent, data-driven insights about flights from Southeast Europe to Ontario including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Southeast Europe to Ontario?

Currently, August is the cheapest month in which you can book a flight from Southeast Europe to Ontario (average of $246). Flying from Southeast Europe to Ontario in March is currently the most expensive (average of $315). 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.

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated February 20, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Qatar Airways from Southeast Europe to Ontario to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Qatar Airways
7.4
Good
3,609 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air France
7.4
Good
1,449 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
8,766 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Southeast Europe to Ontario. 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 into for flights to Ontario from Southeast Europe?

    Ontario (ONT) is the airport you will fly into if you book a flight from Southeast Europe to Ontario. It is only a 3.1 mi journey from Ontario (ONT) to Ontario’s city center.

  • What are the cheapest airlines to fly from Southeast Europe to Ontario one-way?

    The cheapest airline one-way is Air Serbia, with whom users have recently found tickets for as low as $625. However, be on the lookout for offers from Qatar Airways and British Airways, as they are both options that can get you from Southeast Europe to Ontario for a low price.

  • What are the most popular routes from Southeast Europe to Ontario?

    The most popular flight routes from Southeast Europe to Ontario are Athens Eleftherios V. - Ontario, Bucharest Otopeni Intl - Ontario and Zagreb Franjo Tuđman - Ontario.

  • Can I find deals for flights from Southeast Europe to Ontario that include hotel bookings?

    Yes. In addition to deals on Southeast Europe to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Southeast Europe to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Southeast Europe to Ontario.

  • Can I find deals for business class flights from Southeast Europe to Ontario?

    Yes. Cheapflights offers flight deals from Southeast Europe to Ontario 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 Southeast Europe to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Southeast Europe to Ontario (average of $246). Flying from Southeast Europe to Ontario in March is currently the most expensive (average of $315). 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 Southeast Europe to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Charles de Gaulle to Los Angeles flights
Charles de Gaulle to San Francisco flights
Heathrow to Los Angeles flights
Frankfurt to Los Angeles flights
Frankfurt to San Francisco flights
Orly to Los Angeles flights
Frankfurt to Las Vegas flights
Heathrow to San Francisco flights
Heathrow to Las Vegas flights
Madrid to Los Angeles flights
Charles de Gaulle to Burbank flights
Vienna to Los Angeles flights
Barcelona-El Prat to Los Angeles flights
Munich to Los Angeles flights
London City to Los Angeles flights
Orly to Las Vegas flights
Frederic Chopin to Los Angeles flights
Amsterdam to Los Angeles flights
Charles de Gaulle to Long Beach flights
Zurich to Los Angeles flights
Orly to San Francisco flights
Frankfurt to Ontario flights
Charles de Gaulle to Las Vegas flights
Zurich to San Francisco flights
Barcelona-El Prat to San Francisco flights
Munich to San Francisco flights
Leonardo da Vinci/Fiumicino to Los Angeles flights
Gatwick to Los Angeles flights
London City to San Francisco flights
Frankfurt to San Jose flights
Gatwick to San Francisco flights
Malpensa to Los Angeles flights
Amsterdam to Las Vegas flights
Amsterdam to San Francisco flights
Linate to Los Angeles flights
Leonardo da Vinci/Fiumicino to San Francisco flights
Gatwick to Las Vegas flights
Heathrow to Ontario flights
London City to Las Vegas flights
Madrid to Ontario flights
Charles de Gaulle to Santa Ana flights
Dublin to Los Angeles flights
Dublin to Las Vegas flights
Bruxelles-National to Las Vegas flights
Munich to San Diego flights
Charles de Gaulle to Oakland flights
Leonardo da Vinci/Fiumicino to Ontario 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.