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Ontario

$716+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
ATH — ONT
Sep 10 — Sep 171
Wed 9/10
Wed 9/17
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 September 5, 2025.

Round-trip from

$827
(British Airways)

One-way from

$716
(Air Serbia)

Popular in

October

Cheapest in

June

Average price

$772
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. 1% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 5, 2025.

This Iberia deal was found by Cheapflights users on 9/3. 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.
Tue 12/97:35 amATH - ONT
2 stops24h 23mMultiple Airlines
Wed 1/710:57 amONT - ATH
2 stops28h 08mMultiple Airlines
Deal found 9/3$860
This United Airlines deal was found by Cheapflights users on 9/3. 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 12/96:25 amATH - ONT
3 stops26h 24mUnited Airlines
Wed 1/76:39 pmONT - ATH
2 stops21h 01mUnited Airlines
Deal found 9/3$906
This United Airlines deal was found by Cheapflights users on 9/3. 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 11/132:10 pmATH - ONT
2 stops18h 41mUnited Airlines
Thu 11/206:00 amONT - ATH
2 stops18h 20mUnited Airlines
Deal found 9/3$907
This United Airlines deal was found by Cheapflights users on 9/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/287:05 amATH - ONT
2 stops24h 46mUnited Airlines
Thu 11/61:40 pmONT - ATH
2 stops35h 55mUnited Airlines
Deal found 9/4$909
This United Airlines deal was found by Cheapflights users on 9/3. 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.
Fri 9/1912:35 pmATH - ONT
1 stop19h 55mUnited Airlines
Wed 11/56:00 amONT - ATH
2 stops19h 35mUnited Airlines
Deal found 9/3$917
This KLM deal was found by Cheapflights users on 9/4. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1810:30 amATH - ONT
1 stop18h 45mKLM
Thu 9/257:05 amONT - ATH
1 stop16h 55mKLM
Deal found 9/4$938
This Delta deal was found by Cheapflights users on 9/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1810:30 amATH - ONT
1 stop18h 45mDelta
Fri 9/267:05 amONT - ATH
1 stop17h 50mDelta
Deal found 9/4$951
This Delta deal was found by Cheapflights users on 9/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1710:15 amATH - ONT
1 stop19h 00mDelta
Tue 9/237:05 amONT - ATH
1 stop17h 50mDelta
Deal found 9/2$956
This Delta deal was found by Cheapflights users on 9/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1912:10 pmATH - ONT
1 stop20h 13mDelta
Fri 9/267:05 amONT - ATH
1 stop17h 50mDelta
Deal found 9/4$994
This Delta deal was found by Cheapflights users on 9/3. 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.
Fri 9/1912:10 pmATH - ONT
1 stop20h 13mDelta
Tue 9/237:05 amONT - ATH
1 stop17h 50mDelta
Deal found 9/3$995
This United Airlines deal was found by Cheapflights users on 9/3. 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 9/166:55 amATH - ONT
2 stops23h 38mUnited Airlines
Tue 9/237:00 amONT - ATH
1 stop17h 30mUnited Airlines
Deal found 9/3$997

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 September 5, 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 2/18

7:50 am-9:57 pm

2 stops24h 07m

Ontario

Tue 3/3

3:05 pm-7:30 pm

2 stops18h 25m

$827

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Wed 2/18

7:50 am-9:57 pm

2 stops24h 07m

Ontario

Fri 2/27

5:03 pm-9:55 pm

2 stops18h 52m

$827

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Wed 2/18

7:50 am-11:43 pm

2 stops25h 53m

Ontario

Sat 2/28

11:05 am-3:15 pm

2 stops18h 10m

$852

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Tue 12/9

7:35 am-9:58 pm

2 stops24h 23m

Ontario

Wed 1/7

10:57 am-1:05 am

2 stops28h 08m

$860

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Tue 12/9

6:25 am-10:49 pm

3 stops26h 24m

Ontario

Wed 1/7

6:39 pm-1:40 am

2 stops21h 01m

$906

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Thu 12/4

6:25 am-9:49 pm

2 stops25h 24m

Ontario

Tue 12/23

6:39 pm-12:25 am

2 stops43h 46m

$907

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Thu 11/13

2:10 pm-10:51 pm

2 stops18h 41m

Ontario

Thu 11/20

6:00 am-10:20 am

2 stops18h 20m

$907

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Tue 10/28

7:05 am-10:51 pm

2 stops24h 46m

Ontario

Thu 11/6

1:40 pm-11:35 am

2 stops35h 55m

$909

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Fri 9/19

12:35 pm-10:30 pm

1 stop19h 55m

Ontario

Wed 11/5

6:00 am-11:35 am

2 stops19h 35m

$917

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Thu 9/18

10:30 am-7:15 pm

1 stop18h 45m

Ontario

Thu 9/25

7:05 am-10:00 am

1 stop16h 55m

$938

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/4

Showing 1-10 of 21 results
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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 September 5, 2025.
Read through reviews of airlines operating flights from Greece to Ontario, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

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.

  • How long is the flight from Greece to Ontario?

    Airlines like British Airways and United Airlines fly from Greece to Ontario in about 24h 07m. The time it takes to get you to your destination can typically vary by up to 2h 17m. The distance from Greece to Ontario is about 6879 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 September 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$913Average$1,037FlexibilityNo cancel feeOn-time69%

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