HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Athens (ATH) to Ontario (ONT) from $669

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 6/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ATH — ONT
May 21 — May 281
From?
To?
Tue 5/21
Tue 5/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

How far in advance should I book a flight from Athens to Ontario?

Travelers have found it’s best to book a flight 56 days in advance to save up to 55% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 56 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Athens to Ontario 1-2 weeks in advance for as low as $764, or $936 for flights within the next 24 hours.

What is the cheapest month to fly from Athens to Ontario?

Flights from Athens to Ontario lean towards being more expensive in August. Prices are generally better when you fly from Athens to Ontario in February, with the cheapest ticket starting at $661.

When is the cheapest time to fly from Athens to Ontario (ATH - ONT)?

When flying from Athens to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap British Airways flights from Athens to Ontario

Explore cheap flight options specifically provided by British Airways for the route between Athens and Ontario. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 16, 2024.
Check out some of the cheapest British Airways flights we've come across from Athens to Ontario. Make sure to double check the flight details before booking.
Thu 7/115:45 pmATH - ONT
2 stops35h 05mBritish Airways
Sat 7/2712:43 pmONT - ATH
2 stops27h 22mBritish Airways
Deal found 5/15$858
Tue 9/178:00 pmATH - ONT
2 stops35h 42mBritish Airways
Sat 9/2812:45 pmONT - ATH
2 stops21h 00mBritish Airways
Deal found 5/15$867
Fri 6/78:50 pmATH - ONT
2 stops32h 07mBritish Airways
Sun 6/162:44 pmONT - ATH
2 stops25h 26mBritish Airways
Deal found 5/15$932
Tue 6/253:50 pmATH - ONT
2 stops42h 09mBritish Airways
Fri 7/2612:43 pmONT - ATH
2 stops27h 17mBritish Airways
Deal found 5/15$1,035
Tue 9/106:30 pmATH - ONT
2 stops33h 03mBritish Airways
Sat 9/142:52 pmONT - ATH
2 stops25h 13mBritish Airways
Deal found 5/15$1,100

Cheap KLM flights from Athens to Ontario

Explore cheap flight options specifically provided by KLM for the route between Athens and Ontario. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 16, 2024.
To aid your search, here are some of the cheapest KLM flights we've found from Athens to Ontario. Deals are refreshing constantly so come back soon for more options.
Fri 8/161:00 pmATH - ONT
1 stop19h 12mKLM
Sun 10/207:00 amONT - ATH
1 stop17h 45mKLM
Deal found 5/14$924
Wed 8/141:00 pmATH - ONT
1 stop19h 12mKLM
Sun 10/207:00 amONT - ATH
1 stop17h 45mKLM
Deal found 5/14$962
Fri 8/161:00 pmATH - ONT
1 stop19h 12mKLM
Sat 10/197:00 amONT - ATH
1 stop17h 45mKLM
Deal found 5/14$1,002
Wed 8/141:00 pmATH - ONT
1 stop19h 12mKLM
Sat 10/197:00 amONT - ATH
1 stop17h 45mKLM
Deal found 5/14$1,040
Sat 8/171:00 pmATH - ONT
1 stop19h 12mKLM
Mon 10/217:00 amONT - ATH
1 stop17h 45mKLM
Deal found 5/14$1,082
Wed 7/1712:55 pmATH - ONT
1 stop20h 02mKLM
Tue 9/37:00 amONT - ATH
1 stop17h 40mKLM
Deal found 5/15$1,109
Tue 9/1712:55 pmATH - ONT
1 stop19h 33mKLM
Sat 9/287:00 amONT - ATH
1 stop17h 40mKLM
Deal found 5/15$1,130
Tue 9/2412:55 pmATH - ONT
1 stop19h 33mKLM
Fri 10/47:00 amONT - ATH
1 stop17h 45mKLM
Deal found 5/15$1,343
Tue 9/1012:55 pmATH - ONT
1 stop19h 33mKLM
Sat 9/147:00 amONT - ATH
1 stop17h 40mKLM
Deal found 5/15$1,569

Cheap Athens to Ontario flights in May & June 2024

Find cheap flight options from Athens to Ontario specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,644,845 searches. Prices were last updated on May 16, 2024.
Check out some of the best flight deals from Athens to Ontario in 2024. Check back regularly for other flight deals.
Fri 6/78:50 pmATH - ONT
2 stops32h 07mBritish Airways
Sun 6/162:44 pmONT - ATH
2 stops25h 26mBritish Airways
Deal found 5/15$932
Tue 6/253:50 pmATH - ONT
2 stops42h 09mBritish Airways
Fri 7/2612:43 pmONT - ATH
2 stops27h 17mBritish Airways
Deal found 5/15$1,035
Fri 6/712:30 pmATH - ONT
1 stop19h 39mMultiple Airlines
Sun 6/1611:59 pmONT - ATH
1 stop24h 26mMultiple Airlines
Deal found 5/15$1,551
Sat 6/1512:55 pmATH - ONT
1 stop20h 05mKLM
Sat 6/297:05 amONT - ATH
1 stop17h 35mKLM
Deal found 5/15$1,728
Thu 5/1612:55 pmATH - ONT
1 stop19h 52mKLM
Thu 5/236:00 amONT - ATH
1 stop18h 40mKLM
Deal found 5/15$1,735
Sat 6/1512:55 pmATH - ONT
1 stop20h 05mKLM
Mon 7/17:05 amONT - ATH
1 stop17h 35mKLM
Deal found 5/15$1,941
Tue 6/2512:55 pmATH - ONT
1 stop20h 05mKLM
Fri 7/267:00 amONT - ATH
1 stop17h 40mKLM
Deal found 5/15$2,155
Sat 5/2512:25 pmATH - ONT
1 stop19h 44mMultiple Airlines
Sun 6/911:40 pmONT - ATH
1 stop24h 45mMultiple Airlines
Deal found 5/16$2,773
Sun 6/1612:30 pmATH - ONT
1 stop20h 08mMultiple Airlines
Sun 6/3011:59 pmONT - ATH
1 stop24h 26mMultiple Airlines
Deal found 5/15$4,076

Athens to Ontario 2024 flight deals

Discover exclusive flight deals for travel between Athens and Ontario in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 16, 2024.
Check out some of the best flight deals from Athens to Ontario in 2024. Check back regularly for other flight deals.
Thu 7/115:45 pmATH - ONT
2 stops35h 05mBritish Airways
Sat 7/2712:43 pmONT - ATH
2 stops27h 22mBritish Airways
Deal found 5/15$858
Tue 9/178:00 pmATH - ONT
2 stops35h 42mBritish Airways
Sat 9/2812:45 pmONT - ATH
2 stops21h 00mBritish Airways
Deal found 5/15$867
Fri 8/161:00 pmATH - ONT
1 stop19h 12mKLM
Sun 10/207:00 amONT - ATH
1 stop17h 45mKLM
Deal found 5/14$924
Fri 6/78:50 pmATH - ONT
2 stops32h 07mBritish Airways
Sun 6/162:44 pmONT - ATH
2 stops25h 26mBritish Airways
Deal found 5/15$932
Wed 8/141:00 pmATH - ONT
1 stop19h 12mKLM
Sun 10/207:00 amONT - ATH
1 stop17h 45mKLM
Deal found 5/14$962
Wed 7/1712:30 pmATH - ONT
2 stops20h 30mAmerican Airlines
Tue 9/36:10 amONT - ATH
2 stops18h 50mAmerican Airlines
Deal found 5/15$985
Fri 8/161:00 pmATH - ONT
1 stop19h 12mKLM
Sat 10/197:00 amONT - ATH
1 stop17h 45mKLM
Deal found 5/14$1,002
Fri 7/191:15 pmATH - ONT
2 stops30h 39mAmerican Airlines
Thu 7/2510:36 pmONT - ATH
2 stops24h 39mAmerican Airlines
Deal found 5/14$1,017
Tue 6/253:50 pmATH - ONT
2 stops42h 09mBritish Airways
Fri 7/2612:43 pmONT - ATH
2 stops27h 17mBritish Airways
Deal found 5/15$1,035

One-way flights to Ontario from Athens

Search for one-way flight options from Athens to Ontario. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 16, 2024.
Some of the best available deals we've found on one-way flights from Athens to Ontario. Users in need of a round-trip flight from Athens to Ontario instead should update the search form at the top of page.
Fri 6/144:20 amATH - ONT
2 stops28h 18mAir Serbia
Deal found 5/15$669
Fri 9/273:40 pmATH - ONT
2 stops40h 47mAir Serbia
Deal found 5/14$738
Wed 7/1012:30 pmATH - ONT
2 stops20h 30mAmerican Airlines
Deal found 5/14$770
Wed 6/268:00 pmATH - ONT
2 stops36h 59mAmerican Airlines
Deal found 5/15$774
Tue 6/251:25 pmATH - ONT
2 stops30h 38mAmerican Airlines
Deal found 5/15$778
Wed 7/173:30 pmATH - ONT
2 stops40h 58mAir Serbia
Deal found 5/15$784
Tue 7/164:35 pmATH - ONT
2 stops39h 53mAir Serbia
Deal found 5/15$787
Wed 10/163:55 amATH - ONT
2 stops30h 03mMultiple Airlines
Deal found 5/15$795
Fri 8/2311:30 amATH - ONT
2 stops38h 38mAmerican Airlines
Deal found 5/16$800

Find flights from Athens to Ontario within your budget

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 2,644,845 searches. Data last updated May 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$858 - $1,405

Route

Depart

Return

Price

Athens Eleftherios V.Ontario

ATH - ONT

ATHONT

Athens Eleftherios V.

Thu 7/11

2 stops35h 05m

Ontario

Sat 7/27

2 stops27h 22m

$858

Athens Eleftherios V.Ontario

ATH - ONT

ATHONT

Athens Eleftherios V.

Tue 9/17

2 stops35h 42m

Ontario

Sat 9/28

2 stops21h 00m

$867

Athens Eleftherios V.Ontario

ATH - ONT

ATHONT

Athens Eleftherios V.

Fri 8/16

1 stop19h 12m

Ontario

Sun 10/20

1 stop17h 45m

$924

Athens Eleftherios V.Ontario

ATH - ONT

ATHONT

Athens Eleftherios V.

Fri 6/7

2 stops32h 07m

Ontario

Sun 6/16

2 stops25h 26m

$932

Athens Eleftherios V.Ontario

ATH - ONT

ATHONT

Athens Eleftherios V.

Wed 8/14

1 stop19h 12m

Ontario

Sun 10/20

1 stop17h 45m

$962

Athens Eleftherios V.Ontario

ATH - ONT

ATHONT

Athens Eleftherios V.

Wed 7/17

2 stops20h 30m

Ontario

Tue 9/3

2 stops18h 50m

$985

Athens Eleftherios V.Ontario

ATH - ONT

ATHONT

Athens Eleftherios V.

Fri 7/19

2 stops30h 39m

Ontario

Thu 7/25

2 stops24h 39m

$1,017

Athens Eleftherios V.Ontario

ATH - ONT

ATHONT

Athens Eleftherios V.

Thu 8/1

2 stops24h 03m

Ontario

Tue 8/20

2 stops41h 30m

$1,330

Athens Eleftherios V.Ontario

ATH - ONT

ATHONT

Athens Eleftherios V.

Fri 7/19

1 stop19h 58m

Ontario

Thu 7/25

1 stop23h 30m

$1,405

Flights are sorted by cheapest first

Deals found on 5/15

No data available for this route at this time. Please check back soon.

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 16, 2024.
Get a feel of what it's like to fly with British Airways, KLM and American Airlines 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
10,673 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Food

7.4

Overall

8.0

Entertainment

8.0

Reviews

1 / 10

Crew was nice and courteous. Boarding went smoothly. But we experienced a few minutes of extreme turbulence.

Delta
8.0
Very good
10,673 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Food

7.4

Overall

8.0

Entertainment

8.0

Reviews

1 / 10

Crew was nice and courteous. Boarding went smoothly. But we experienced a few minutes of extreme turbulence.

KLM
7.9
Good
1,568 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Food

7.4

Overall

8.0

Entertainment

8.0

Reviews

1 / 10

Crew was nice and courteous. Boarding went smoothly. But we experienced a few minutes of extreme turbulence.

Qatar Airways
7.7
Good
4,393 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Food

7.4

Overall

8.0

Entertainment

8.0

Reviews

1 / 10

Crew was nice and courteous. Boarding went smoothly. But we experienced a few minutes of extreme turbulence.

United Airlines
7.4
Good
10,946 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Food

7.4

Overall

8.0

Entertainment

8.0

Reviews

1 / 10

Crew was nice and courteous. Boarding went smoothly. But we experienced a few minutes of extreme turbulence.

American Airlines
7.3
Good
14,535 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Food

7.4

Overall

8.0

Entertainment

8.0

Reviews

1 / 10

Crew was nice and courteous. Boarding went smoothly. But we experienced a few minutes of extreme turbulence.

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.

  • Can I find flights from Athens to Ontario for under $900 on Cheapflights?

    Yes, there are multiple flights from Athens to Ontario for under $900. The cheapest flight booked recently is on British Airways for just $858, but on average you can expect to pay $1,143.

  • 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 $669. American Airlines flights start at $770 while deals on KLM start at $803 one-way.

  • What does ATH to ONT mean?

    ATH and ONT are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. ATH to ONT refers to a flight route from Athens Eleftherios V. Airport to Ontario Airport.

  • Can I find deals for flights from Athens to Ontario that include extra baggage allowance?

    The amount of baggage you can bring on your Athens to Ontario flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Athens to Ontario with specific airlines?

    Yes, Cheapflights allows you to browse and filter Athens to Ontario flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • 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.

  • Can I find deals for flights from Athens to Ontario that allow pets onboard?

    Many airlines flying from Athens to Ontario offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Athens to Ontario?

    Yes, you can often find last-minute deals on Athens to Ontario flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Athens to Ontario flight deals updated?

    The Athens to Ontario flight deals you see on this page were last updated on 5/15.

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.

Alternative routes for Athens to Ontario
See prices for flight routes from nearby airports that may be better suited for you.

Athens to Los Angeles flights
Athens to San Francisco flights
Athens to Las Vegas flights
Athens to Burbank flights
Athens to San Diego flights
Athens to Santa Ana flights
Athens to San Jose flights
Athens to Oakland flights
Los Angeles to Houston flights
New York to Paris flights
Houston to New Orleans flights
Nashville to Boston flights
Houston to Denver flights
Kansas City to Chicago flights
Houston to Dubai flights
Boston to Dallas flights
USA to London flights
Chicago to Phoenix flights
Denver to New York flights
Athens to Porto flights

Search flights from Athens to Ontario by cabin class

Find flights from Athens to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Montes Claros
Flights to Girona Costa Brava
Flights to Naxos
Flights to Bourgas
Flights to Hyannis Barnstable
Flights to Samos
Flights to Reggio Calabria Tito Menniti
Flights to Devils Lake
Flights to Ningbo Lishe Intl
Flights to Pellston Emmet County
Flights to Provincetown
Flights to Cortez Montezuma County
Flights to Ohrid
Flights to Oran Es Senia
Flights to Menorca/Mahon
Flights to Hakodate
Flights to Ordu/Giresun
Flights to Laayoune Hassan I
Flights to Cornwall Newquay
Flights to Melilla
Flights to Rennes St Jacques
Flights to Parikia Paros
Flights to Constanţa Mihail Kogalniceanu
Flights to Miyakojima Hirara

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Athens to Ontario?

Cheapflights makes it easy to find Athens to Ontario flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Athens to Ontario?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Athens to Ontario for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Athens to Ontario with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Athens to Ontario flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Athens to Ontario become cheaper?

Of course! You can now track prices for flights from Athens to Ontario and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines