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$582+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
ATH — ONT
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
1 adult, Economy
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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 septiembre 16, 2025.

Round-trip from

$780
(Delta)

One-way from

$582
(Iberia)
From Southeast Europe to Ontario
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One-way flight from Southeast Europe to Ontario
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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 septiembre 16, 2025.

This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/1412:35 pmBEG - ONT
2 stops36h 34mDelta
mar. 11/187:05 amONT - BEG
2 stops19h 50mDelta
Deal found 9/15$780
This American Airlines deal was found by Cheapflights users on 9/16. 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.
jue. 10/26:45 pmZAG - ONT
2 stops33h 09mAmerican Airlines
lun. 10/612:48 pmONT - ZAG
2 stops21h 37mAmerican Airlines
Deal found 9/16$816
This American Airlines deal was found by Cheapflights users on 9/16. 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.
jue. 10/28:25 amOTP - ONT
2 stops20h 29mAmerican Airlines
lun. 10/611:59 pmONT - OTP
2 stops29h 26mAmerican Airlines
Deal found 9/16$820
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.
mié. 11/266:30 amZAG - ONT
2 stops25h 34mDelta
dom. 11/3010:25 pmONT - ZAG
2 stops31h 10mDelta
Deal found 9/14$825
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/278:10 pmATH - ONT
2 stops29h 18mAmerican Airlines
mar. 11/410:34 pmONT - ATH
2 stops40h 31mAmerican Airlines
Deal found 9/14$830
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.
jue. 12/116:25 amATH - ONT
2 stops24h 17mUnited Airlines
sáb. 1/101:20 pmONT - ATH
2 stops17h 15mUnited Airlines
Deal found 9/15$832
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.
mar. 10/287:05 amATH - ONT
2 stops38h 32mUnited Airlines
mar. 11/41:33 pmONT - ATH
2 stops34h 32mUnited Airlines
Deal found 9/14$833
This United Airlines deal was found by Cheapflights users on 9/16. 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.
jue. 10/24:00 pmATH - ONT
2 stops39h 24mUnited Airlines
lun. 10/66:27 pmONT - ATH
2 stops27h 43mUnited Airlines
Deal found 9/16$834
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.
mié. 11/266:15 amZAG - ONT
2 stops25h 16mUnited Airlines
dom. 11/306:00 amONT - ZAG
2 stops31h 15mUnited Airlines
Deal found 9/13$836
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.
sáb. 11/112:05 pmSOF - ONT
2 stops19h 37mBritish Airways
sáb. 11/156:10 amONT - SOF
2 stops20h 50mBritish Airways
Deal found 9/14$868
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.
mié. 12/246:15 amBEG - ONT
2 stops24h 37mUnited Airlines
sáb. 1/176:00 amONT - BEG
2 stops21h 55mUnited Airlines
Deal found 9/15$871
This lol.travel 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/37:05 amATH - ONT
2 stops39h 32mUnited Airlines
dom. 11/167:00 amONT - ATH
2 stops32h 40mUnited Airlines
Deal found 9/14$880

Cheapflights Fare Finder

 
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 septiembre 16, 2025.
Use the filters below to find and compare flights from Southeast Europe to Ontario that are best for you.

Fly from

Southeast Europe

Fly to

Ontario

Route

Depart

Return

Price

BelgradeOntario

BEG - ONT

BEGONT

Belgrade Nikola Tesla

vie. 11/14

12:35 pm-5:09 pm

2 stops37h 34m

Ontario

mar. 11/18

7:05 am-11:25 pm

2 stops31h 20m

$780

ZagrebOntario

ZAG - ONT

ZAGONT

Zagreb Franjo Tuđman

jue. 10/2

6:45 pm-6:54 pm

2 stops33h 09m

Ontario

lun. 10/6

12:48 pm-7:25 pm

2 stops21h 37m

$816

BucharestOntario

OTP - ONT

OTPONT

Bucharest Otopeni Intl

jue. 10/2

8:25 am-6:54 pm

2 stops20h 29m

Ontario

lun. 10/6

11:59 pm-3:25 pm

2 stops29h 26m

$820

ZagrebOntario

ZAG - ONT

ZAGONT

Zagreb Franjo Tuđman

mié. 11/26

6:30 am-11:04 pm

2 stops25h 34m

Ontario

dom. 11/30

10:25 pm-2:35 pm

2 stops31h 10m

$825

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

jue. 10/30

7:50 pm-6:53 pm

2 stops32h 03m

Ontario

mar. 11/4

12:53 pm-1:20 am

2 stops26h 27m

$830

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

dom. 12/14

6:15 am-8:42 pm

2 stops24h 27m

Ontario

sáb. 1/10

1:20 pm-4:35 pm

2 stops17h 15m

$832

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

mié. 10/1

10:25 am-9:24 pm

2 stops20h 59m

Ontario

dom. 10/5

6:27 pm-8:10 am

2 stops27h 43m

$833

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

mié. 10/29

7:05 am-10:51 pm

2 stops24h 46m

Ontario

mar. 11/4

1:33 pm-10:05 am

2 stops34h 32m

$833

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

mié. 10/29

7:05 am-10:51 pm

2 stops24h 46m

Ontario

mié. 11/5

5:05 am-10:05 am

2 stops19h 00m

$833

ZagrebOntario

ZAG - ONT

ZAGONT

Zagreb Franjo Tuđman

mié. 11/26

6:15 am-10:31 pm

2 stops25h 16m

Ontario

dom. 11/30

6:00 am-10:15 pm

2 stops31h 15m

$836

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 60 results
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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.

Cheapflights Insights

Everything you need to know about your flight from Southeast Europe to Ontario

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 $327). 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.

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 septiembre 16, 2025.
Read reviews from past customers who have flown United Airlines from Southeast Europe to Ontario. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,924 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,924 reviews
United Airlines
7.4
Good
8,924 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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.

  • How long is the flight from Southeast Europe to Ontario?

    Departing from Southeast Europe to Ontario will take you 24h 27m. Airlines will cover a distance of 6879 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as $586. However, be on the lookout for offers from American Airlines and Air Serbia, 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 Sofia - 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 $327). 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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Alternative routes for Southeast Europe to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Southeast Europe to Ontario

Discover the top airline that operate flights from Southeast Europe to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$913Average$1,037FlexibilityNo cancel feeOn-time69%

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