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Ontario

$554+ 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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
ATH — ONT
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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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 October 29, 2025.

This American Airlines deal was found by Cheapflights users on 10/28. 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.
Fri 11/1412:50 pmATH - ONT
2 stops33h 04mAmerican Airlines
Tue 11/1810:47 amONT - ATH
2 stops22h 43mAmerican Airlines
Deal found 10/28$895
This Iberia deal was found by Cheapflights users on 10/28. 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.
Fri 11/147:45 amATH - ONT
2 stops24h 44mMultiple Airlines
Tue 11/1810:47 amONT - ATH
2 stops22h 43mMultiple Airlines
Deal found 10/28$907
This Finnair deal was found by Cheapflights users on 10/28. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1312:50 pmATH - ONT
2 stops21h 07mMultiple Airlines
Mon 11/177:00 amONT - ATH
2 stops18h 00mMultiple Airlines
Deal found 10/28$909
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Sun 11/232:00 pmATH - ONT
2 stops18h 51mUnited Airlines
Wed 2/251:45 pmONT - ATH
2 stops16h 50mUnited Airlines
Deal found 10/29$927
This United Airlines deal was found by Cheapflights users on 10/26. 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 11/262:20 pmATH - ONT
2 stops18h 31mUnited Airlines
Wed 12/31:34 pmONT - ATH
2 stops17h 01mUnited Airlines
Deal found 10/26$929
This KLM deal was found by Cheapflights users on 10/28. 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 11/276:05 amATH - ONT
2 stops22h 13mKLM
Thu 12/412:12 pmONT - ATH
2 stops18h 23mKLM
Deal found 10/28$976
This Gotogate deal was found by Cheapflights users on 10/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/227:55 amATH - ONT
2 stops21h 10mMultiple Airlines
Thu 1/2910:58 amONT - ATH
2 stops18h 17mMultiple Airlines
Deal found 10/29$1,100
This Qatar Airways deal was found by Cheapflights users on 10/26. 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.
Sat 11/2212:40 pmATH - ONT
2 stops45h 19mQatar Airways
Thu 11/276:00 amONT - ATH
2 stops50h 00mQatar Airways
Deal found 10/26$1,371
This United Airlines deal was found by Cheapflights users on 10/28. 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 11/116:35 amATH - ONT
2 stops24h 09mUnited Airlines
Sat 11/156:05 amONT - ATH
2 stops18h 00mUnited Airlines
Deal found 10/28$1,386
This United Airlines deal was found by Cheapflights users on 10/28. 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 12/2412:50 pmATH - ONT
2 stops19h 35mUnited Airlines
Sun 1/45:05 amONT - ATH
2 stops33h 20mUnited Airlines
Deal found 10/28$1,392
This Finnair deal was found by Cheapflights users on 10/27. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/212:50 pmATH - ONT
2 stops21h 07mMultiple Airlines
Sun 11/167:00 amONT - ATH
2 stops18h 00mMultiple Airlines
Deal found 10/27$1,437
This lastminute.com deal was found by Cheapflights users on 10/29. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/287:45 amATH - ONT
2 stops24h 38mBritish Airways
Fri 1/304:49 pmONT - ATH
2 stops19h 06mBritish Airways
Deal found 10/29$1,470

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 October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$895
(American Airlines)

One-way from

$554
(Kiwi.com)

Popular in

October

Cheapest in

September

Average price

$1,069
Provider with most accurate pricing for Athens Eleftherios V.-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Athens Eleftherios V.-Los Angeles flights.
Search Deals
From Greece to Ontario
Search Deals
One-way flight from Greece to Ontario
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 29, 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.

Fri 11/14

12:50 pm-11:54 am

2 stops33h 04m

Ontario

Tue 11/18

10:47 am-7:30 pm

2 stops22h 43m

$895

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Fri 11/14

7:45 am-10:29 pm

2 stops24h 44m

Ontario

Tue 11/18

10:47 am-7:30 pm

2 stops22h 43m

$907

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Thu 11/13

12:50 pm-11:57 pm

2 stops21h 07m

Ontario

Mon 11/17

7:00 am-11:00 am

2 stops18h 00m

$909

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Fri 2/13

6:05 am-7:54 pm

2 stops23h 49m

Ontario

Thu 4/16

7:00 am-10:35 am

1 stop17h 35m

$922

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sun 11/23

2:00 pm-10:51 pm

2 stops18h 51m

Ontario

Wed 2/25

1:45 pm-4:35 pm

2 stops16h 50m

$927

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Wed 11/26

2:20 pm-10:51 pm

2 stops18h 31m

Ontario

Wed 12/3

1:34 pm-4:35 pm

2 stops17h 01m

$929

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Fri 3/27

11:25 am-10:35 pm

2 stops44h 10m

Ontario

Tue 3/31

4:15 pm-6:35 pm

2 stops16h 20m

$937

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sat 1/24

6:35 am-5:51 pm

2 stops21h 16m

Ontario

Sat 2/28

1:45 pm-4:35 pm

2 stops16h 50m

$940

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Fri 3/27

12:20 pm-11:38 am

1 stop32h 18m

Ontario

Tue 3/31

1:00 pm-10:55 pm

2 stops23h 55m

$951

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sat 11/15

9:40 pm-7:17 am

3 stops43h 37m

$554

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 19 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, June is the cheapest month in which you can book a flight from Greece to Ontario (average of $366). Flying from Greece to Ontario in October is currently the most expensive (average of $830). 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 October 29, 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
8,999 reviews

Entertainment

7.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

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
8,999 reviews
United Airlines
7.4
Good
8,999 reviews

Entertainment

7.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

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 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 American Airlines and United Airlines fly from Greece to Ontario in about 23h 49m. The time it takes to get you to your destination can typically vary by up to 9h 15m. 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, June is the cheapest month in which you can book a flight from Greece to Ontario (average of $366). Flying from Greece to Ontario in October is currently the most expensive (average of $830). 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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$913Average$1,037FlexibilityNo cancel feeOn-time69%

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