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Ontario

$667+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
ATH — ONT
Apr 9 — Apr 161
Wed 4/9
Wed 4/16
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 April 4, 2025.

Round-trip from

$781
(Delta)

One-way from

$667
(Air Serbia)
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 April 4, 2025.

This Delta deal was found by Cheapflights users on 4/3. 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.
Sat 4/1910:30 amATH - ONT
2 stops21h 35mDelta
Wed 4/237:00 amONT - ATH
1 stop17h 55mDelta
Deal found 4/3$781
This British Airways deal was found by Cheapflights users on 4/3. 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.
Wed 9/249:30 pmSOF - ONT
2 stops54h 21mBritish Airways
Wed 10/85:02 pmONT - SOF
2 stops34h 28mBritish Airways
Deal found 4/3$783
This United Airlines deal was found by Cheapflights users on 4/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:00 amSOF - ONT
2 stops26h 53mUnited Airlines
Thu 10/95:45 amONT - SOF
2 stops26h 55mUnited Airlines
Deal found 4/3$835
This KLM deal was found by Cheapflights users on 4/3. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2610:30 amATH - ONT
1 stop18h 58mKLM
Sat 4/2610:15 pmONT - ATH
1 stop26h 40mKLM
Deal found 4/3$852
This United Airlines deal was found by Cheapflights users on 4/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/36:10 amBEG - ONT
2 stops23h 24mUnited Airlines
Sat 5/106:00 amONT - BEG
2 stops21h 40mUnited Airlines
Deal found 4/3$868
This Lufthansa deal was found by Cheapflights users on 4/3. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/196:55 amATH - ONT
2 stops23h 26mMultiple Airlines
Wed 4/231:20 pmONT - ATH
2 stops23h 40mMultiple Airlines
Deal found 4/3$908
This United Airlines deal was found by Cheapflights users on 4/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/26:15 amSJJ - ONT
2 stops20h 14mUnited Airlines
Tue 9/167:00 amONT - SJJ
2 stops19h 50mUnited Airlines
Deal found 4/3$971
This United Airlines deal was found by Cheapflights users on 4/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/81:10 pmATH - ONT
2 stops35h 40mUnited Airlines
Fri 4/186:10 amONT - ATH
2 stops41h 45mUnited Airlines
Deal found 4/3$1,004
This Air France deal was found by Cheapflights users on 4/4. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/207:00 amSOF - ONT
2 stops25h 36mMultiple Airlines
Thu 4/245:45 amONT - SOF
2 stops22h 15mMultiple Airlines
Deal found 4/4$1,060
This Air Serbia deal was found by Cheapflights users on 4/3. 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 Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/83:20 pmDBV - ONT
2 stops39h 21mAir Serbia
Sun 9/2111:00 pmONT - DBV
2 stops30h 30mAir Serbia
Deal found 4/3$1,081
This Iberia deal was found by Cheapflights users on 4/3. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1011:25 pmDBV - ONT
2 stops33h 11mIberia
Sat 9/2712:49 pmONT - DBV
2 stops21h 11mIberia
Deal found 4/3$1,116
This British Airways deal was found by Cheapflights users on 4/4. 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.
Sun 8/1010:45 amZAG - ONT
2 stops19h 50mBritish Airways
Sun 8/1710:51 amONT - ZAG
2 stops17h 59mBritish Airways
Deal found 4/4$1,131

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 April 4, 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

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sat 4/19

10:30 am-10:05 pm

2 stops21h 35m

Ontario

Wed 4/23

7:00 am-10:55 am

1 stop17h 55m

$781

SofiaOntario

SOF - ONT

SOFONT

Sofia

Wed 9/24

9:30 pm-5:51 pm

2 stops54h 21m

Ontario

Wed 10/8

5:02 pm-1:30 pm

2 stops34h 28m

$783

SofiaOntario

SOF - ONT

SOFONT

Sofia

Thu 9/25

6:00 am-10:53 pm

2 stops26h 53m

Ontario

Thu 10/9

5:45 am-6:40 pm

2 stops26h 55m

$835

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sat 4/26

10:30 am-7:28 pm

1 stop18h 58m

Ontario

Sat 4/26

10:15 pm-10:55 am

1 stop26h 40m

$852

BelgradeOntario

BEG - ONT

BEGONT

Belgrade Nikola Tesla

Sat 5/3

6:10 am-8:34 pm

2 stops23h 24m

Ontario

Sat 5/10

6:00 am-12:40 pm

2 stops21h 40m

$868

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sat 4/19

6:55 am-8:21 pm

2 stops23h 26m

Ontario

Wed 4/23

1:20 pm-11:00 pm

2 stops23h 40m

$908

SarajevoOntario

SJJ - ONT

SJJONT

Sarajevo Butmir

Tue 9/2

6:15 am-5:29 pm

2 stops20h 14m

Ontario

Tue 9/16

7:00 am-11:50 am

2 stops19h 50m

$971

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Thu 7/24

12:35 pm-10:11 pm

1 stop19h 36m

Ontario

Thu 8/7

7:00 am-10:30 am

1 stop17h 30m

$1,031

SofiaOntario

SOF - ONT

SOFONT

Sofia

Sun 4/20

7:00 am-10:36 pm

2 stops25h 36m

Ontario

Thu 4/24

5:45 am-2:00 pm

2 stops22h 15m

$1,060

DubrovnikOntario

DBV - ONT

DBVONT

Dubrovnik

Mon 9/8

3:20 pm-9:41 pm

2 stops39h 21m

Ontario

Sun 9/21

11:00 pm-2:30 pm

2 stops30h 30m

$1,081

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

Showing 1-10 of 55 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 $328). 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 April 4, 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
7,901 reviews

Crew

8.5

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

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
7,901 reviews
Delta
8.0
Very good
7,901 reviews

Crew

8.5

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

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
1,324 reviews
Delta
8.0
Very good
7,901 reviews

Crew

8.5

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

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
3,542 reviews
Delta
8.0
Very good
7,901 reviews

Crew

8.5

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

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
Etihad Airways
7.4
Good
1,184 reviews
Delta
8.0
Very good
7,901 reviews

Crew

8.5

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

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
1,427 reviews
Delta
8.0
Very good
7,901 reviews

Crew

8.5

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

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 $667. 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 $328). 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 April 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$913Average$1,037FlexibilityNo cancel feeOn-time69%

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