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Ontario

$721+ Cheap flights from Greece 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
ATH — ONT
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap flight deals from Greece to Ontario

Keep the following information in mind while searching for Greece to Ontario flight deals. Data was last updated July 3, 2025.

Round-trip from

$917
(United Airlines)

One-way from

$721
(Air Serbia)

Popular in

December

Cheapest in

June

Average price

$960
From Greece to Ontario
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One-way flight from Greece to Ontario
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Highest demand for flights based on searches. 0% potential increase in price ($7 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Greece to Ontario

Cheapest flights from Greece to Ontario
Explore the most affordable flight options available from Greece to Ontario. 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 7/3. 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.
Wed 12/36:15 amATH - ONT
2 stops21h 31mUnited Airlines
Wed 2/251:00 pmONT - ATH
2 stops17h 35mUnited Airlines
Deal found 7/3$917
This Ticket 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2212:20 pmATH - ONT
1 stop20h 00mKLM
Sat 9/67:05 amONT - ATH
1 stop17h 50mKLM
Deal found 7/2$924
This Delta deal was found by Cheapflights users on 7/1. 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 11/66:00 amATH - ONT
2 stops21h 17mDelta
Fri 11/146:00 amONT - ATH
2 stops21h 45mDelta
Deal found 7/1$939
This American Airlines deal was found by Cheapflights users on 7/1. 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.
Thu 7/1012:00 pmATH - ONT
1 stop19h 38mAmerican Airlines
Mon 7/144:45 pmONT - ATH
2 stops23h 25mAmerican Airlines
Deal found 7/1$991
This Lufthansa 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/196:00 amATH - ONT
2 stops24h 54mMultiple Airlines
Wed 7/236:39 pmONT - ATH
2 stops18h 21mMultiple Airlines
Deal found 7/3$998
This Air France 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/199:10 amATH - ONT
1 stop20h 10mAir France
Wed 7/2311:50 amONT - ATH
2 stops21h 05mAir France
Deal found 7/3$1,016

Cheapflights Fare Finder

Customize your flight search to find flights from Greece 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 July 3, 2025.
Use the filters below to find and compare flights from Greece to Ontario that are best for you.

Fly from

Greece

Fly to

Ontario

Route

Depart

Return

Price

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Wed 12/3

6:15 am-5:46 pm

2 stops21h 31m

Ontario

Wed 2/25

1:00 pm-4:35 pm

2 stops17h 35m

$917

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Fri 8/22

12:20 pm-10:20 pm

1 stop20h 00m

Ontario

Sat 9/6

7:05 am-10:55 am

1 stop17h 50m

$924

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Thu 11/6

6:00 am-5:17 pm

2 stops21h 17m

Ontario

Wed 11/12

6:00 am-1:45 pm

2 stops21h 45m

$939

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sat 7/19

6:00 am-8:54 pm

2 stops24h 54m

Ontario

Wed 7/23

6:39 pm-11:00 pm

2 stops18h 21m

$998

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sat 7/19

9:10 am-7:20 pm

1 stop20h 10m

Ontario

Wed 7/23

11:50 am-6:55 pm

2 stops21h 05m

$1,016

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Mon 7/21

4:20 pm-9:59 pm

2 stops39h 39m

$721

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Fri 8/22

12:00 pm-9:12 pm

1 stop19h 12m

$831

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sat 8/2

8:35 pm-11:54 pm

2 stops37h 19m

$842

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Tue 8/26

8:15 pm-10:48 pm

2 stops36h 33m

$854

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Wed 10/8

10:15 am-10:41 pm

1 stop22h 26m

$896

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 12 results
1
2

Best time to book a flight from Greece to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Greece 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 Greece to Ontario

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

Currently, August is the cheapest month in which you can book a flight from Greece to Ontario (average of $246). Flying from Greece 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.

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 July 3, 2025.
Read through reviews of airlines operating flights from Greece to Ontario, such as Delta, KLM, and Air France. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
1,367 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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 Greece 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 Greece?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Greece. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

    The cheapest airlines for a one-way flight from Greece to Ontario are Air Serbia ($721), American Airlines ($831), and Iberia ($854).

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

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

  • How can I find direct flights from Greece to Ontario?

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

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

    Yes. Cheapflights offers flight deals from Greece 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 Greece to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Greece to Ontario (average of $246). Flying from Greece 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 Greece 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 Greece to Ontario

Discover the top airline that operate flights from Greece 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$913Average$1,037FlexibilityNo cancel feeOn-time69%

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