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$418+ 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 6/26. Fares are subject to change and may not be available on all flights or dates of travel.
ATH — ONT
May 19 — May 261
Mon 5/19
Mon 5/26
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 May 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
2 stars

Round-trip from

$809
(British Airways)

One-way from

$418
(Trip.com)

Popular in

December

Cheapest in

March

Average price

$862
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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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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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 May 14, 2025.

This British Airways deal was found by Cheapflights users on 5/13. 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.
Mon 5/267:45 amATH - ONT
2 stops24h 12mBritish Airways
Mon 6/22:44 pmONT - ATH
2 stops24h 06mBritish Airways
Deal found 5/13$809
This American Airlines deal was found by Cheapflights users on 5/14. 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 6/1211:05 amATH - ONT
2 stops21h 09mAmerican Airlines
Mon 6/168:15 amONT - ATH
2 stops30h 35mAmerican Airlines
Deal found 5/14$817
This Delta deal was found by Cheapflights users on 5/14. 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.
Sun 6/81:40 pmATH - ONT
2 stops44h 06mDelta
Sat 6/1411:49 amONT - ATH
1 stop37h 06mDelta
Deal found 5/14$906
This Lufthansa deal was found by Cheapflights users on 5/13. 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.
Tue 5/2712:35 pmATH - ONT
1 stop19h 51mMultiple Airlines
Tue 6/36:41 pmONT - ATH
2 stops18h 19mMultiple Airlines
Deal found 5/13$914
This KLM deal was found by Cheapflights users on 5/13. 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 8/1412:10 pmATH - ONT
1 stop20h 19mKLM
Sun 8/2410:59 pmONT - ATH
1 stop25h 01mKLM
Deal found 5/13$1,018
This Iberia deal was found by Cheapflights users on 5/14. 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 7/64:10 amATH - ONT
2 stops28h 47mIberia
Thu 7/2410:53 amONT - ATH
2 stops22h 42mIberia
Deal found 5/14$1,076
This United Airlines deal was found by Cheapflights users on 5/13. 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.
Mon 5/2612:35 pmATH - ONT
1 stop19h 51mUnited Airlines
Mon 6/26:41 pmONT - ATH
2 stops18h 19mUnited Airlines
Deal found 5/13$1,159
This Air Serbia deal was found by Cheapflights users on 5/13. 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 9/84:30 amATH - ONT
2 stops27h 11mAir Serbia
Sun 9/1411:00 pmONT - ATH
2 stops42h 25mAir Serbia
Deal found 5/13$1,203
This Air Canada deal was found by Cheapflights users on 5/13. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/262:30 pmATH - ONT
3 stops32h 01mAir Canada
Mon 6/25:10 amONT - ATH
3 stops21h 40mAir Canada
Deal found 5/13$1,463
This Qatar Airways deal was found by Cheapflights users on 5/14. 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.
Tue 7/18:00 pmATH - ONT
2 stops32h 04mQatar Airways
Thu 7/246:00 amONT - ATH
2 stops39h 00mQatar Airways
Deal found 5/14$1,831
This Etihad Airways deal was found by Cheapflights users on 5/13. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/121:55 pmATH - ONT
2 stops42h 04mEtihad Airways
Thu 6/1911:59 pmONT - ATH
2 stops44h 11mEtihad Airways
Deal found 5/13$3,960

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 May 14, 2025.
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.

Mon 5/26

7:45 am-9:57 pm

2 stops24h 12m

Ontario

Mon 6/2

2:44 pm-12:50 am

2 stops24h 06m

$809

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Thu 6/12

11:05 am-10:14 pm

2 stops21h 09m

Ontario

Mon 6/16

8:15 am-12:50 am

2 stops30h 35m

$817

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sun 6/8

1:40 pm-11:46 pm

2 stops44h 06m

Ontario

Sat 6/14

11:49 am-10:55 am

1 stop37h 06m

$906

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Tue 5/27

12:35 pm-10:26 pm

1 stop19h 51m

Ontario

Tue 6/3

6:41 pm-11:00 pm

2 stops18h 19m

$914

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Thu 8/14

12:10 pm-10:29 pm

1 stop20h 19m

Ontario

Sun 8/24

10:59 pm-10:00 am

1 stop25h 01m

$1,018

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Sun 7/6

4:10 am-10:57 pm

2 stops28h 47m

Ontario

Thu 7/24

10:53 am-7:35 pm

2 stops22h 42m

$1,076

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Mon 5/26

12:35 pm-10:26 pm

1 stop19h 51m

Ontario

Mon 6/2

6:41 pm-11:00 pm

2 stops18h 19m

$1,159

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Mon 9/8

4:30 am-9:41 pm

2 stops27h 11m

Ontario

Sun 9/14

11:00 pm-3:25 am

2 stops42h 25m

$1,203

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Mon 5/26

2:30 pm-12:31 pm

3 stops32h 01m

Ontario

Mon 6/2

5:10 am-12:50 pm

3 stops21h 40m

$1,463

AthensOntario

ATH - ONT

ATHONT

Athens Eleftherios V.

Tue 7/1

8:00 pm-6:04 pm

2 stops32h 04m

Ontario

Thu 7/24

6:00 am-7:00 am

2 stops39h 00m

$1,831

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/13

Showing 1-10 of 22 results
1
2
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  • Most accurate provider: When it comes to deals on Athens-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Athens-Ontario flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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, August is the cheapest month in which you can book a flight from Athens to Ontario (average of $246). Flying from Athens 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 May 14, 2025.
Get a feel of what it's like to fly with Delta, KLM and Qatar Airways from Athens to Ontario by reading reviews from past customers. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,949 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

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
7,949 reviews
Delta
8.0
Very good
7,949 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

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
1,342 reviews
Delta
8.0
Very good
7,949 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

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
3,571 reviews
Delta
8.0
Very good
7,949 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

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
1,206 reviews
Delta
8.0
Very good
7,949 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

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
8,726 reviews
Delta
8.0
Very good
7,949 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

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 Athens to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    To fly one-way, consider booking your trip with Air Serbia, which is currently one of the cheapest options available, starting at $686. British Airways flights start at $800 while deals on American Airlines start at $803 one-way.

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

Browse thousands of different options on Cheapflights for your next trip

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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 May 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$913Average$1,037FlexibilityNo cancel feeOn-time69%

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