Which airports can I use when flying from Ontario to Athens?

Flights from Ontario to Athens usually depart from Ontario (ONT) and arrive at Athens Eleftherios V. (ATH).

What cabin classes can I book on flights from Ontario to Athens?

Two cabin classes are available on flights from Ontario to Athens: • Economy Class • Premium Economy Class

Which airports do connecting flights from Ontario to Athens pass through?

Connecting flights from Ontario to Athens most commonly pass through: • Atlanta Hartsfield-Jackson (ATL) - 71% of one-stop connections • Dallas/Fort Worth (DFW) - 29% of one-stop connections Together, these airports account for 100% of one-stop bookings on this route.

Can I save money by using flexible dates for flights from Ontario to Athens?

Yes. Being flexible with your travel dates can save you up to 55% on the Ontario to Athens route. Tuesday is the cheapest departure day at $571 round-trip on average, while Monday is the most expensive at $1,242, a difference of $671. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in Athens?

Some of the most popular sights in Athens are Acropolis, Syntagma Square and Monastiraki. These are among the most viewed places in Athens on KAYAK.

How long is a flight from Ontario to Athens?

A nonstop flight from Ontario to Athens takes 0h 00m, covering 6,879 miles.

Do I need a passport to fly from Ontario to Athens?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

How are flight prices from Ontario to Athens looking right now?

One-way fares from Ontario to Athens are currently lower than usual. Average one-way flight prices are about $488, which is 19% below the typical average for this route.

How much time can I save by choosing a different layover airport from Ontario to Athens?

Flying via Atlanta Hartsfield-Jackson (ATL) gives the shortest average 1-stop total travel time at 18h 21m, compared with 19h 15m via Dallas/Fort Worth (DFW).

What is the time difference between Ontario and Athens?

Athens is 10 hours ahead of Ontario (Eastern European Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Athens Eleftherios V. Airport (ATH)?

Athens Eleftherios V. Airport (ATH) hosts 5 major car rental companies, with daily rates starting from around $2 for economy cars. Top options include: · Centauro · Record go · Europcar · SURPRICE CAR RENTAL · Alamo

How much should I expect to pay for a Ontario to Athens flight?

Round-trip flights from Ontario to Athens range from $653 to $823, with an average of $746 over the past 12 months. Anything below $653 counts as a good deal.

What is the most popular layover airport when flying from Ontario to Athens?

Atlanta Hartsfield-Jackson (ATL) is the most popular layover for the Ontario to Athens route. 71% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via ATL.

What is the cheapest layover airport when flying from Ontario to Athens?

Flights via Atlanta Hartsfield-Jackson (ATL) offer the most affordable fares, with an average round-trip price of $829. Based on KAYAK data over the past 3 months.

When flying from Ontario to Athens which airport offers the shortest layover?

Atlanta Hartsfield-Jackson (ATL) had the shortest average connection time for Ontario to Athens layovers at 606 minutes over the past 3 months.

$389 CHEAP FLIGHTS from Ontario to Athens (ONT - ATH)

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest round-trip

$838

Typical prices: $653-$823

Multiple Airlines

Thu 1/18Thu 2/1

ONT - ATH • 2 stops

Cheapest one-way

$389

Typical prices: $297-$619

KLM

Sat 1/13

ONT - ATH • 2 stops

Nonstop flights

Not available

There are currently no direct flights between Ontario and Athens. You'll need to take a connecting flight to reach the destination.

Insights

When to travel

February

Cheapest • 34% price drop

March

Most popular

Good to know

Top layover airports

Atlanta Hartsfield-Jackson (ATL)

Cheapest • Avg $829 (round-trip)

Dallas/Fort Worth (DFW)

Shortest trip • 19h 15m (one-way)

Insights

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We hope you love your trip to Athens!

Flight Deals

Cheap Flights from Ontario to Athens (ONT-ATH)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Ontario to Athens

Mon, Jan 18 - Mon, Feb 1

4:25 pm - 11:20 pmONT Ontario-ATH Athens Eleftherios V.

20h 55m2 stops Phoenix Sky Harbor Intl London Heathrow

3:50 pm - 11:54 amATH Athens Eleftherios V.-ONT Ontario

30h 04m2 stops Madrid Barajas Dallas/Fort Worth

$838Multiple Airlines

Tue, Jan 19 - Mon, Feb 1

7:00 am - 1:40 pmONT Ontario-ATH Athens Eleftherios V.

20h 40m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:30 pm - 4:12 pmATH Athens Eleftherios V.-ONT Ontario

32h 42m2 stops Amsterdam Schiphol Salt Lake City

$839Multiple Airlines

Wed, Jan 20 - Fri, Jan 29

4:03 pm - 1:30 amONT Ontario-ATH Athens Eleftherios V.

23h 27m2 stops San Francisco Munich Franz Josef Strauss

6:45 am - 8:20 pmATH Athens Eleftherios V.-ONT Ontario

23h 35m3 stops Frankfurt am Main Newark Denver Intl

$841United Airlines

Sun, Jan 17 - Tue, Feb 2

12:44 pm - 3:55 pmONT Ontario-ATH Athens Eleftherios V.

41h 11m2 stops Dallas/Fort Worth London Heathrow

4:55 pm - 9:59 pmATH Athens Eleftherios V.-ONT Ontario

39h 04m2 stops London Heathrow Phoenix Sky Harbor Intl

$842British Airways

Wed, Jan 20 - Wed, Feb 3

11:20 am - 1:30 amONT Ontario-ATH Athens Eleftherios V.

28h 10m2 stops San Francisco Munich Franz Josef Strauss

7:05 am - 8:20 pmATH Athens Eleftherios V.-ONT Ontario

23h 15m3 stops Zurich Newark Denver Intl

$843United Airlines

Sun, Oct 11 - Wed, Oct 21

7:00 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

17h 35m1 stop Chicago O'Hare Intl

12:35 pm - 10:49 pmATH Athens Eleftherios V.-ONT Ontario

20h 14m1 stop Chicago O'Hare Intl

$844United Airlines

Sat, Jan 16 - Thu, Feb 4

3:30 pm - 1:40 pmONT Ontario-ATH Athens Eleftherios V.

60h 10m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle

6:10 am - 4:12 pmATH Athens Eleftherios V.-ONT Ontario

20h 02m2 stops Amsterdam Schiphol Salt Lake City

$847Delta

Tue, Jan 19 - Wed, Feb 3

4:03 pm - 1:30 amONT Ontario-ATH Athens Eleftherios V.

47h 27m2 stops San Francisco Munich Franz Josef Strauss

7:05 am - 8:20 pmATH Athens Eleftherios V.-ONT Ontario

23h 15m3 stops Zurich Newark Denver Intl

$849United Airlines

Tue, Mar 2 - Fri, Mar 5

6:53 pm - 9:20 pmONT Ontario-ATH Athens Eleftherios V.

40h 27m2 stops San Francisco Frankfurt am Main

12:25 pm - 12:33 pmATH Athens Eleftherios V.-ONT Ontario

34h 08m2 stops Newark Denver Intl

$853United Airlines

Wed, Jan 20 - Mon, Feb 1

7:00 am - 1:30 amONT Ontario-ATH Athens Eleftherios V.

32h 30m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

12:55 pm - 8:20 pmATH Athens Eleftherios V.-ONT Ontario

41h 25m3 stops Munich Franz Josef Strauss Newark Denver Intl

$854United Airlines

Recent last minute flight deals from Ontario to Athens

Fri, Sep 11 - Wed, Sep 16

7:00 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

17h 35m1 stop Chicago O'Hare Intl

12:35 pm - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

20h 24m1 stop Chicago O'Hare Intl

$1,034United Airlines

Sat, Sep 12 - Mon, Sep 21

1:18 pm - 10:00 amONT Ontario-ATH Athens Eleftherios V.

34h 42m2 stops Denver Intl Washington, D.C. Dulles Intl

10:25 am - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

22h 34m2 stops Newark Chicago O'Hare Intl

$1,038United Airlines

Sat, Sep 12 - Mon, Sep 21

5:00 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

19h 35m2 stops Denver Intl Chicago O'Hare Intl

5:55 am - 8:53 pmATH Athens Eleftherios V.-ONT Ontario

24h 58m2 stops Munich Franz Josef Strauss Denver Intl

$1,153Lufthansa

Mon, Sep 7 - Wed, Oct 7

7:05 am - 11:45 amONT Ontario-ATH Athens Eleftherios V.

18h 40m1 stop Dallas/Fort Worth

1:00 pm - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

19h 59m1 stop Charlotte Douglas

$1,224British Airways

Sat, Sep 12 - Mon, Sep 21

7:05 am - 9:20 amONT Ontario-ATH Athens Eleftherios V.

16h 15m1 stop Atlanta Hartsfield-Jackson

6:00 am - 10:40 pmATH Athens Eleftherios V.-ONT Ontario

26h 40m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,227Delta

Tue, Sep 8 - Fri, Sep 11

6:08 am - 10:00 amONT Ontario-ATH Athens Eleftherios V.

17h 52m2 stops San Francisco Washington, D.C. Dulles Intl

12:35 pm - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

20h 24m1 stop Chicago O'Hare Intl

$1,230United Airlines

Tue, Sep 8 - Fri, Sep 11

6:00 am - 1:40 pmONT Ontario-ATH Athens Eleftherios V.

21h 40m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle

6:00 am - 10:40 pmATH Athens Eleftherios V.-ONT Ontario

26h 40m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,238Delta

Sat, Sep 12 - Wed, Sep 23

7:05 am - 11:00 amONT Ontario-ATH Athens Eleftherios V.

17h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 8:24 pmATH Athens Eleftherios V.-ONT Ontario

20h 39m1 stop Atlanta Hartsfield-Jackson

$1,286KLM

Mon, Sep 7 - Fri, Oct 16

7:05 am - 11:45 amONT Ontario-ATH Athens Eleftherios V.

18h 40m1 stop Dallas/Fort Worth

1:10 pm - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

19h 49m1 stop Charlotte Douglas

$1,329British Airways

Sat, Sep 12 - Sat, Sep 26

7:05 am - 11:00 amONT Ontario-ATH Athens Eleftherios V.

17h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 6:41 pmATH Athens Eleftherios V.-ONT Ontario

18h 56m1 stop Atlanta Hartsfield-Jackson

$1,346KLM

Booking Insights

Price, demand and travel trends for Ontario to Athens flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Ontario to Athens with more confidence.

Airlines

Layovers

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

United Airlines ($841) and British Airways ($842) are the cheapest airlines to fly round-trip from Ontario to Athens according to KAYAK data over the last 5 days.

Find deals

Low season	December
High season	March
Cheapest flight	$389

Most popular time to fly with an average 3% increase in price.

Flight from Ontario to Athens

When to book flights from Ontario to Athens

Are your dates flexible? Find out the best times to travel from Ontario to Athens based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which airports can I use when flying from Ontario to Athens?
Flights from Ontario to Athens usually depart from Ontario (ONT) and arrive at Athens Eleftherios V. (ATH).
What cabin classes can I book on flights from Ontario to Athens?
Two cabin classes are available on flights from Ontario to Athens:

• Economy Class
• Premium Economy Class
Which airports do connecting flights from Ontario to Athens pass through?
Connecting flights from Ontario to Athens most commonly pass through:

• Atlanta Hartsfield-Jackson (ATL) - 71% of one-stop connections
• Dallas/Fort Worth (DFW) - 29% of one-stop connections
Together, these airports account for 100% of one-stop bookings on this route.
Can I save money by using flexible dates for flights from Ontario to Athens?
Yes. Being flexible with your travel dates can save you up to 55% on the Ontario to Athens route. Tuesday is the cheapest departure day at $571 round-trip on average, while Monday is the most expensive at $1,242, a difference of $671. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What popular places can I visit in Athens?
Some of the most popular sights in Athens are Acropolis, Syntagma Square and Monastiraki. These are among the most viewed places in Athens on KAYAK.
How long is a flight from Ontario to Athens?
A nonstop flight from Ontario to Athens takes 0h 00m, covering 6,879 miles.
Do I need a passport to fly from Ontario to Athens?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
How are flight prices from Ontario to Athens looking right now?
One-way fares from Ontario to Athens are currently lower than usual. Average one-way flight prices are about $488, which is 19% below the typical average for this route.
How much time can I save by choosing a different layover airport from Ontario to Athens?
Flying via Atlanta Hartsfield-Jackson (ATL) gives the shortest average 1-stop total travel time at 18h 21m, compared with 19h 15m via Dallas/Fort Worth (DFW).
What is the time difference between Ontario and Athens?
Athens is 10 hours ahead of Ontario (Eastern European Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.
What car rental options are available at Athens Eleftherios V. Airport (ATH)?
Athens Eleftherios V. Airport (ATH) hosts 5 major car rental companies, with daily rates starting from around $2 for economy cars. Top options include:
· Centauro
· Record go
· Europcar
· SURPRICE CAR RENTAL
· Alamo
How much should I expect to pay for a Ontario to Athens flight?
Round-trip flights from Ontario to Athens range from $653 to $823, with an average of $746 over the past 12 months. Anything below $653 counts as a good deal.

If your dates can be flexible, aim for a Tuesday departure instead of Monday. On this route, Tuesday flights average $571 - about $671 less than Monday (54% savings) based on the last 12 months.
If you can choose when to travel, plan your Ontario to Athens trip for February. Fares historically average $491 round-trip in that month - typically $751 less than the most expensive month, which is July (based on the last 12 months).

More options for your flight from Ontario to Athens

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Complete your trip to Athens with a hotel stay or car rental

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ONT - ATH

$389 Find Cheap Flights from Ontario to Athens - Compare and Save

Everything you should know

Cheap Flights from Ontario to Athens (ONT-ATH)

Recent round-trip flight deals from Ontario to Athens

Recent one-way flight deals from Ontario to Athens

Recent last minute flight deals from Ontario to Athens

Price, demand and travel trends for Ontario to Athens flights

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

What is the most popular layover airport when flying from Ontario to Athens?

What is the cheapest layover airport when flying from Ontario to Athens?

When flying from Ontario to Athens which airport offers the shortest layover?

Key details for Ontario to Athens flights

Low season

High season

Cheapest flight

When to book flights from Ontario to Athens

Your Ontario to Athens flight questions, answered

Your guide to booking Ontario to Athens flights

More options for your flight from Ontario to Athens

Complete your trip to Athens with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from Ontario to Athens

Find direct flights to and from Ontario and Athens

Flights from domestic origins to Athens

Flights to other popular destinations

Find deals for your return flight