ATH - ONT

$603 Find Cheap Flights from Athens to Ontario - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$1,016
Typical prices: $1,563-$1,567
Multiple Airlines
Fri 11/2Thu 11/15
ATH - ONT • 3 stops
Cheapest one-way
$603
Typical prices: $706-$995
Multiple Airlines
Thu 11/15
ATH - ONT • 3 stops
Nonstop flights
Not available
There are currently no direct flights between Athens and Ontario. You'll need to take a connecting flight to reach the destination.
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Cheap Flights from Athens to Ontario (ATH-ONT)

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

Recent round-trip flight deals from Athens to Ontario

Mon, Nov 2 - Sun, Nov 15
Multiple Airlines Logo
10:10 am - 9:40 amATH  Athens Eleftherios V.-ONT Ontario
33h 30m3 stops Istanbul San Francisco Las Vegas Harry Reid Intl
Multiple Airlines Logo
12:01 pm - 9:00 pmONT  Ontario-ATH Athens Eleftherios V.
22h 59m2 stops San Francisco Istanbul
$1,016Multiple Airlines
Fri, Oct 2 - Sun, Oct 18
American Airlines Logo
10:45 am - 6:17 pmATH  Athens Eleftherios V.-ONT Ontario
41h 32m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl
American Airlines Logo
9:41 am - 6:30 pmONT  Ontario-ATH Athens Eleftherios V.
22h 49m2 stops Phoenix Sky Harbor Intl London Heathrow
$1,028American Airlines
Fri, Oct 2 - Mon, Oct 19
American Airlines Logo
10:45 am - 6:17 pmATH  Athens Eleftherios V.-ONT Ontario
41h 32m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl
American Airlines Logo
1:05 pm - 2:10 amONT  Ontario-ATH Athens Eleftherios V.
27h 05m2 stops Phoenix Sky Harbor Intl London Heathrow
$1,028American Airlines
Fri, Oct 2 - Tue, Oct 20
American Airlines Logo
10:45 am - 6:17 pmATH  Athens Eleftherios V.-ONT Ontario
41h 32m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl
American Airlines Logo
7:00 am - 2:10 amONT  Ontario-ATH Athens Eleftherios V.
33h 10m2 stops Dallas/Fort Worth London Heathrow
$1,028American Airlines
Fri, Oct 2 - Thu, Oct 15
American Airlines Logo
10:45 am - 6:17 pmATH  Athens Eleftherios V.-ONT Ontario
41h 32m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl
American Airlines Logo
6:00 am - 2:20 pmONT  Ontario-ATH Athens Eleftherios V.
22h 20m2 stops Dallas/Fort Worth London Heathrow
$1,028American Airlines
Fri, Oct 2 - Fri, Oct 16
American Airlines Logo
10:45 am - 6:17 pmATH  Athens Eleftherios V.-ONT Ontario
41h 32m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl
American Airlines Logo
10:25 am - 7:35 pmONT  Ontario-ATH Athens Eleftherios V.
23h 10m2 stops Dallas/Fort Worth London Heathrow
$1,028American Airlines
Fri, Oct 2 - Wed, Oct 14
American Airlines Logo
10:45 am - 6:17 pmATH  Athens Eleftherios V.-ONT Ontario
41h 32m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl
American Airlines Logo
1:05 pm - 2:25 amONT  Ontario-ATH Athens Eleftherios V.
27h 20m2 stops Phoenix Sky Harbor Intl London Heathrow
$1,028American Airlines
Fri, Oct 2 - Sat, Oct 17
American Airlines Logo
10:45 am - 6:17 pmATH  Athens Eleftherios V.-ONT Ontario
41h 32m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl
American Airlines Logo
11:59 pm - 6:30 pmONT  Ontario-ATH Athens Eleftherios V.
32h 31m2 stops Dallas/Fort Worth London Heathrow
$1,028American Airlines
Fri, Oct 2 - Wed, Oct 14
American Airlines Logo
10:45 am - 6:17 pmATH  Athens Eleftherios V.-ONT Ontario
41h 32m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl
American Airlines Logo
10:10 pm - 11:20 amONT  Ontario-ATH Athens Eleftherios V.
27h 10m1 stop Charlotte Douglas
$1,035American Airlines
Mon, Feb 8 - Wed, Feb 17
KLM Logo
6:10 am - 4:12 pmATH  Athens Eleftherios V.-ONT Ontario
20h 02m2 stops Amsterdam Schiphol Salt Lake City
KLM Logo
12:00 pm - 4:30 pmONT  Ontario-ATH Athens Eleftherios V.
18h 30m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol
$1,036KLM
Booking Insights

Price, demand and travel trends for Athens to Ontario flights

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

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

American Airlines ($1,028) and KLM ($1,036) are the cheapest airlines to fly round-trip from Athens to Ontario according to KAYAK data over the last 5 days.

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Key details for Athens to Ontario flights

Cheapest flight

$603
Flight from Athens to Ontario

When to book flights from Athens to Ontario

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

Your Athens to Ontario flight questions, answered

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

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

    Two cabin classes are available on flights from Athens to Ontario:

    • Economy Class
    • Premium Economy Class

  • How long is a flight from Athens to Ontario?

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

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

    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 Athens to Ontario looking right now?

    One-way fares from Athens to Ontario are currently lower than usual. Average one-way flight prices are about $686, which is 23% below the typical average for this route.

  • What car rental options are available at Ontario Airport (ONT)?

    Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:
    • Fox
    • Thrifty
    • Europcar
    • Dollar
    • Alamo

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

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

  • What is the time difference between Athens and Ontario?

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

  • What popular places can I visit in Ontario?

    Some of the most popular sights in Ontario are Ontario Convention Center and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

Your guide to booking Athens to Ontario flights

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

More options for your flight from Athens to Ontario

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

Car rentals in Ontario
Hotels in Ontario
Vacations in Ontario