ONT - ATH

$378 Find Cheap Flights from Ontario to Athens - Compare and Save

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Everything you should know

Cheapest round-trip
$682
Typical prices: $653-$823
Delta
Sat 1/20Sun 1/28
ONT - ATH • 2 stops
Cheapest one-way
$378
Typical prices: $297-$619
British Airways
Wed 2/7
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
Insights
When to travel
February
Cheapest • 34% price drop
March
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Atlanta Hartsfield-Jackson (ATL)
Cheapest • Avg $829 (round-trip)
Dallas/Fort Worth (DFW)
Shortest trip • 19h 15m (one-way)
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Insights
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Flight Deals

Cheap Flights from Ontario to Athens (ONT-ATH)

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

Recent round-trip flight deals from Ontario to Athens

Wed, Jan 20 - Fri, Jan 29
Delta Logo
7:00 am - 1:40 pmONT  Ontario-ATH Athens Eleftherios V.
20h 40m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle
Delta Logo
6:10 am - 10:43 pmATH  Athens Eleftherios V.-ONT Ontario
26h 33m2 stops Amsterdam Schiphol Seattle/Tacoma Intl
$682Delta
Wed, Jan 20 - Wed, Jan 27
Delta Logo
7:00 am - 1:40 pmONT  Ontario-ATH Athens Eleftherios V.
20h 40m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle
Delta Logo
6:10 am - 10:14 pmATH  Athens Eleftherios V.-ONT Ontario
26h 04m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson
$682Delta
Wed, Jan 20 - Thu, Jan 28
Delta Logo
7:00 am - 1:40 pmONT  Ontario-ATH Athens Eleftherios V.
20h 40m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle
Delta Logo
6:10 am - 4:12 pmATH  Athens Eleftherios V.-ONT Ontario
20h 02m2 stops Amsterdam Schiphol Salt Lake City
$682Delta
Wed, Jan 20 - Wed, Jan 27
Delta Logo
7:00 am - 1:40 pmONT  Ontario-ATH Athens Eleftherios V.
20h 40m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle
Delta Logo
6:10 am - 4:12 pmATH  Athens Eleftherios V.-ONT Ontario
20h 02m2 stops Amsterdam Schiphol Salt Lake City
$682Delta
Wed, Jan 20 - Fri, Jan 29
Delta Logo
7:00 am - 1:40 pmONT  Ontario-ATH Athens Eleftherios V.
20h 40m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle
Delta Logo
6:10 am - 4:12 pmATH  Athens Eleftherios V.-ONT Ontario
20h 02m2 stops Amsterdam Schiphol Salt Lake City
$682Delta
Wed, Jan 20 - Thu, Jan 28
Delta Logo
7:00 am - 1:40 pmONT  Ontario-ATH Athens Eleftherios V.
20h 40m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle
Delta Logo
6:10 am - 10:14 pmATH  Athens Eleftherios V.-ONT Ontario
26h 04m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson
$682Delta
Wed, Feb 3 - Wed, Feb 10
KLM Logo
12:00 pm - 4:30 pmONT  Ontario-ATH Athens Eleftherios V.
18h 30m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol
KLM Logo
6:10 am - 4:12 pmATH  Athens Eleftherios V.-ONT Ontario
20h 02m2 stops Amsterdam Schiphol Salt Lake City
$694KLM
Sun, Oct 4 - Wed, Oct 14
Delta Logo
10:00 pm - 9:20 amONT  Ontario-ATH Athens Eleftherios V.
25h 20m1 stop Atlanta Hartsfield-Jackson
Delta Logo
1:35 pm - 11:16 amATH  Athens Eleftherios V.-ONT Ontario
55h 41m2 stops Amsterdam Schiphol Seattle/Tacoma Intl
$695Delta
Sun, Oct 4 - Tue, Oct 13
Delta Logo
10:00 pm - 9:20 amONT  Ontario-ATH Athens Eleftherios V.
25h 20m1 stop Atlanta Hartsfield-Jackson
Delta Logo
1:35 pm - 11:16 amATH  Athens Eleftherios V.-ONT Ontario
55h 41m2 stops Amsterdam Schiphol Seattle/Tacoma Intl
$695Delta
Fri, Oct 16 - Wed, Oct 21
Delta Logo
7:07 am - 11:00 amONT  Ontario-ATH Athens Eleftherios V.
17h 53m1 stop Atlanta Hartsfield-Jackson
Delta Logo
9:45 am - 8:25 pmATH  Athens Eleftherios V.-ONT Ontario
20h 40m1 stop Atlanta Hartsfield-Jackson
$698Delta
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.

How much is a round-trip flight from Ontario to Athens?

Round-trip flights from Ontario to Athens start at $682. Prices are typical for this route right now, with typical round-trip fares ranging from $653 to $823. The lowest price found in the past 5 days was $682 on Delta.

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Key details for Ontario to Athens flights

Low season

December

Cheapest flight

$378
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

Your Ontario to Athens flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • 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 Parthenon. 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 $467, which is 23% 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.

Your guide to booking Ontario to Athens flights

Get tips on when to book, when to fly and what to know before your trip.
  • 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

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

Car rentals in Athens
Hotels in Athens
Vacations in Athens