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$528+ Cheap flights from Athens (ATH) 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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
ATH — ONT
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
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Cheap flight deals from Athens to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Athens (ATH) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$851
(American Airlines)

One-way from

$528
(Kiwi.com)

Popular in

January

Cheapest in

September

Average price

$1,048
Provider with most accurate pricing for Athens Eleftherios V.-Ontario flight deals.
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Provider most trusted by Cheapflights users for Athens Eleftherios V.-Ontario flights.
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From Athens Eleftherios V. to Ontario
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One-way flight from Athens Eleftherios V. to Ontario
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Highest demand for flights based on searches. 12% potential increase in price ($113 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Athens to Ontario

Cheapest flights from Athens to Ontario
Explore the most affordable flight options available from Athens to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 8, 2026.

This American Airlines deal was found by Cheapflights users on 1/7. 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.
Wed 1/287:50 amATH - ONT
2 stops36h 18mAmerican Airlines
Sun 2/17:16 amONT - ATH
2 stops25h 54mAmerican Airlines
Deal found 1/7$851
This American Airlines deal was found by Cheapflights users on 1/6. 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 1/237:50 pmATH - ONT
2 stops32h 55mAmerican Airlines
Tue 1/277:16 amONT - ATH
2 stops32h 04mAmerican Airlines
Deal found 1/6$852
This Iberia deal was found by Cheapflights users on 1/8. 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.
Mon 2/29:55 pmATH - ONT
2 stops34h 53mIberia
Sat 2/217:00 amONT - ATH
2 stops22h 15mIberia
Deal found 1/8$857
This Iberia deal was found by Cheapflights users on 1/8. 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.
Thu 2/59:55 pmATH - ONT
2 stops34h 53mIberia
Sat 2/216:00 amONT - ATH
2 stops23h 15mIberia
Deal found 1/8$882
This Iberia deal was found by Cheapflights users on 1/7. 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.
Thu 2/129:55 pmATH - ONT
2 stops34h 34mIberia
Tue 3/36:00 amONT - ATH
2 stops23h 15mIberia
Deal found 1/7$883
This Iberia deal was found by Cheapflights users on 1/8. 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.
Sat 2/79:55 pmATH - ONT
2 stops34h 53mIberia
Sat 2/217:00 amONT - ATH
2 stops22h 15mIberia
Deal found 1/8$889
This Iberia deal was found by Cheapflights users on 1/8. 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.
Sun 2/19:55 pmATH - ONT
2 stops34h 53mIberia
Sat 2/2110:56 amONT - ATH
2 stops18h 19mIberia
Deal found 1/8$892
This Iberia deal was found by Cheapflights users on 1/6. 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.
Mon 2/99:55 pmATH - ONT
2 stops34h 53mIberia
Thu 2/266:00 amONT - ATH
2 stops32h 35mIberia
Deal found 1/6$898
This Iberia deal was found by Cheapflights users on 1/6. 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.
Sat 2/79:55 pmATH - ONT
2 stops34h 53mIberia
Tue 3/36:00 amONT - ATH
2 stops23h 15mIberia
Deal found 1/6$899
This Iberia deal was found by Cheapflights users on 1/6. 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.
Thu 2/129:55 pmATH - ONT
2 stops34h 34mIberia
Thu 2/267:00 amONT - ATH
2 stops31h 35mIberia
Deal found 1/6$901
This Iberia deal was found by Cheapflights users on 1/6. 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.
Sat 2/79:55 pmATH - ONT
2 stops34h 53mIberia
Thu 2/267:00 amONT - ATH
2 stops31h 35mIberia
Deal found 1/6$908
This Iberia deal was found by Cheapflights users on 1/7. 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.
Thu 2/129:55 pmATH - ONT
2 stops34h 34mIberia
Mon 3/210:56 amONT - ATH
2 stops42h 19mIberia
Deal found 1/7$913

Cheapflights Fare Finder

 
Customize your flight search to find flights from Athens 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 January 8, 2026.
Use the filters below to find and compare flights from Athens to Ontario that are best for you.

Fly from

Athens

Fly to

Ontario

Route

Depart

Return

Price

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Wed 1/28

7:50 am-10:08 am

2 stops36h 18m

Ontario

Sun 2/1

7:16 am-7:10 pm

2 stops25h 54m

$851

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Thu 2/5

7:30 am-10:13 pm

2 stops24h 43m

Ontario

Thu 2/12

10:56 am-4:15 pm

2 stops19h 19m

$883

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sun 3/15

6:15 am-10:57 pm

2 stops25h 42m

Ontario

Wed 6/17

6:30 pm-10:35 am

2 stops30h 05m

$951

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Tue 3/17

2:10 pm-12:18 pm

2 stops31h 08m

Ontario

Sun 6/14

7:00 am-10:35 am

1 stop17h 35m

$951

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Mon 3/16

1:10 pm-12:18 pm

2 stops32h 08m

Ontario

Sun 6/14

5:00 am-10:35 am

2 stops19h 35m

$951

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sun 3/15

6:15 am-10:57 pm

2 stops25h 42m

Ontario

Mon 6/15

9:45 am-10:35 am

2 stops38h 50m

$951

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Mon 3/16

6:25 am-10:25 pm

2 stops25h 00m

Ontario

Mon 6/15

9:45 am-10:35 am

2 stops38h 50m

$951

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Tue 3/17

2:10 pm-12:18 pm

2 stops31h 08m

Ontario

Wed 6/17

6:30 pm-10:35 am

2 stops30h 05m

$951

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sun 3/15

2:00 pm-5:41 pm

2 stops36h 41m

Ontario

Thu 6/18

5:00 am-10:35 am

2 stops19h 35m

$951

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sat 3/14

6:30 am-10:57 pm

2 stops25h 27m

Ontario

Mon 6/15

6:30 pm-10:35 am

2 stops30h 05m

$951

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Showing 1-10 of 24 results
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Compare providers for flights from Athens to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Athens to Ontario in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Athens-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Athens-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Athens-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Athens-Ontario flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Athens-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Athens to Ontario

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

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

Currently, June is the cheapest month in which you can book a flight from Athens to Ontario (average of $359). Flying from Athens to Ontario in October is currently the most expensive (average of $806). 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 January 8, 2026.
Read through reviews of airlines operating flights from Athens 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
9,139 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
9,139 reviews
United Airlines
7.4
Good
9,139 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 Athens to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Athens to Ontario?

    Departing from Athens to Ontario will take you 24h 43m. Airlines will cover a distance of 6879 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

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

    Currently, June is the cheapest month in which you can book a flight from Athens to Ontario (average of $359). Flying from Athens to Ontario in October is currently the most expensive (average of $806). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Athens to Ontario

Discover the top airline that operate flights from Athens 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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$913Average$1,037FlexibilityNo cancel feeOn-time69%

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