ONT - ATH

$381 Find Cheap Flights from Ontario to Athens - Compare and Save

1 adult
1 adult, Economy, 0 bags

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.

Everything you should know

Cheapest round-trip
$829
Typical prices: $653-$823
United Airlines
Sun 11/18Sun 12/2
ONT - ATH • 2 stops
Cheapest one-way
$381
Typical prices: $297-$619
British Airways
Wed 1/17
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 • 18h 42m (one-way)
Insights
Insights
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Athens!
Flight Deals
Booking Insights
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, Nov 18 - Wed, Dec 2
United Airlines Logo
6:00 am - 10:05 amONT  Ontario-ATH Athens Eleftherios V.
18h 05m2 stops Houston George Bush Intcntl Newark
United Airlines Logo
6:40 am - 5:47 pmATH  Athens Eleftherios V.-ONT Ontario
21h 07m2 stops Munich Franz Josef Strauss San Francisco
$829United Airlines
Sun, Nov 22 - Fri, Nov 27
Delta Logo
6:00 am - 1:40 pmONT  Ontario-ATH Athens Eleftherios V.
45h 40m2 stops Salt Lake City Paris Charles de Gaulle
Delta Logo
6:10 am - 10:08 pmATH  Athens Eleftherios V.-ONT Ontario
25h 58m2 stops Amsterdam Schiphol Salt Lake City
$830Delta
Wed, Nov 18 - Wed, Nov 25
United Airlines Logo
6:00 am - 10:05 amONT  Ontario-ATH Athens Eleftherios V.
18h 05m2 stops Houston George Bush Intcntl Newark
United Airlines Logo
6:45 am - 8:15 pmATH  Athens Eleftherios V.-ONT Ontario
23h 30m2 stops Frankfurt am Main San Francisco
$833United Airlines
Mon, Oct 5 - Tue, Oct 20
KLM Logo
7:05 am - 9:20 amONT  Ontario-ATH Athens Eleftherios V.
16h 15m1 stop Atlanta Hartsfield-Jackson
KLM Logo
9:45 am - 8:25 pmATH  Athens Eleftherios V.-ONT Ontario
20h 40m1 stop Atlanta Hartsfield-Jackson
$839KLM
Wed, Jan 20 - Wed, Feb 3
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
$844KLM
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
6:00 am - 10:43 pmATH  Athens Eleftherios V.-ONT Ontario
26h 43m2 stops Amsterdam Schiphol Seattle/Tacoma Intl
$848Delta
Wed, Sep 16 - Wed, Oct 21
Delta Logo
11:54 am - 11:00 pmONT  Ontario-ATH Athens Eleftherios V.
25h 06m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle
Delta Logo
6:00 am - 10:43 pmATH  Athens Eleftherios V.-ONT Ontario
26h 43m2 stops Amsterdam Schiphol Seattle/Tacoma Intl
$852Delta
Wed, Sep 16 - Wed, Oct 21
Delta Logo
6:00 am - 11:00 pmONT  Ontario-ATH Athens Eleftherios V.
31h 00m2 stops Salt Lake City Paris Charles de Gaulle
Delta Logo
9:45 am - 11:06 amATH  Athens Eleftherios V.-ONT Ontario
35h 21m1 stop Atlanta Hartsfield-Jackson
$853Delta
Wed, Sep 30 - Wed, Oct 7
United Airlines Logo
8:03 am - 11:05 pmONT  Ontario-ATH Athens Eleftherios V.
29h 02m2 stops San Francisco Munich Franz Josef Strauss
United Airlines Logo
6:00 am - 10:51 pmATH  Athens Eleftherios V.-ONT Ontario
26h 51m2 stops Munich Franz Josef Strauss San Francisco
$856United Airlines
Mon, Sep 28 - Tue, Nov 17
United Airlines Logo
7:00 am - 10:35 amONT  Ontario-ATH Athens Eleftherios V.
17h 35m1 stop Chicago O'Hare Intl
United Airlines Logo
6:45 am - 6:01 pmATH  Athens Eleftherios V.-ONT Ontario
21h 16m2 stops Frankfurt am Main San Francisco
$859United Airlines
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 $829. Prices are above average 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 $829 on United Airlines.

Find deals

Key details for Ontario to Athens flights

Low season

December

Cheapest flight

$381
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?

    Only Economy Class is available on flights from Ontario to Athens.

  • 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) - 74% of one-stop connections
    • Dallas/Fort Worth (DFW) - 26% 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.

  • What are the earliest and latest flights from Ontario to Athens?

    These are the earliest and latest flight times available from Ontario to Athens:

    • Earliest: departs at 12:00 am and lands at 12:00 am
    • Latest: departs at 12:00 am and lands at 12:00 am.

    The flight takes about 0h 00m.

  • 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 $442, which is 27% 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 18h 42m 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).

Everything you need to know for your flight from Ontario to Athens

Information on your arrival and departure airports

Ontario (ONT)
Athens (ATH)