ATH - ONT

$703 Find Cheap Flights from Athens to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Athens to Ontario departing on 6/17. 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.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Athens to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Athens to Ontario, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Athens to Ontario (ATH-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Athens to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Athens to Ontario

Tue, Oct 7 - Sat, Oct 25
American Airlines Logo
5:40 pm - 5:53 pmATH-ONT
34h 13m2 stops
American Airlines Logo
5:02 pm - 2:10 amONT-ATH
23h 08m2 stops
$818American Airlines
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Tue, Jun 24 - Tue, Jul 1
British Airways Logo
7:55 am - 9:38 pmATH-ONT
23h 43m2 stops
British Airways Logo
4:50 pm - 2:10 amONT-ATH
23h 20m2 stops
$820British Airways
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Wed, Sep 3 - Mon, Sep 22
Iberia Logo
10:35 pm - 6:54 pmATH-ONT
30h 19m2 stops
Iberia Logo
12:47 pm - 3:10 pmONT-ATH
40h 23m2 stops
$881Iberia
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Wed, Jul 2 - Fri, Oct 10
United Airlines Logo
12:10 pm - 10:52 pmATH-ONT
20h 42m2 stops
United Airlines Logo
6:37 pm - 10:05 amONT-ATH
29h 28m2 stops
$888United Airlines
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Thu, Sep 4 - Mon, Sep 22
Iberia Logo
6:55 pm - 7:00 pmATH-ONT
34h 05m2 stops
Iberia Logo
12:47 pm - 3:10 pmONT-ATH
40h 23m2 stops
$891Iberia
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Wed, Sep 3 - Tue, Sep 16
United Airlines Logo
3:30 pm - 10:30 pmATH-ONT
41h 00m2 stops
United Airlines Logo
5:10 am - 10:05 amONT-ATH
18h 55m2 stops
$895United Airlines
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Fri, Sep 5 - Fri, Sep 19
Delta Logo
6:00 am - 4:08 pmATH-ONT
20h 08m2 stops
Delta Logo
10:59 pm - 10:00 amONT-ATH
25h 01m1 stop
$909Delta
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Thu, Sep 4 - Sat, Sep 20
KLM Logo
9:10 am - 7:11 pmATH-ONT
20h 01m1 stop
KLM Logo
7:00 am - 10:00 amONT-ATH
17h 00m1 stop
$911KLM
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Sun, Sep 7 - Sun, Sep 21
Delta Logo
1:40 pm - 8:55 amATH-ONT
53h 15m2 stops
Delta Logo
10:59 pm - 10:55 amONT-ATH
25h 56m1 stop
$932Delta
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Sat, Aug 23 - Mon, Sep 8
KLM Logo
9:10 am - 7:11 pmATH-ONT
20h 01m1 stop
KLM Logo
7:05 am - 10:00 amONT-ATH
16h 55m1 stop
$953KLM
Find Deal
Useful Info

KAYAK's insights & trends for Athens to Ontario flights

Get data-powered insights and trends into flights from Athens to Ontario to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Athens to Ontario?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Athens to Ontario were found on American Airlines ($818) and British Airways ($820).

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Good to know

Cheapest flight$703
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
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.

FAQs for booking flights from Athens to Ontario

  • What is the cheapest flight from Athens to Ontario?

    In the last 3 days, the lowest price for a flight from Athens to Ontario was $703 for a one-way ticket and $818 for a round-trip.

  • Do I need a passport to fly between Athens and Ontario?

    A passport is required to fly from Athens to Ontario.

  • Which aircraft models fly most regularly from Athens to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Athens to Ontario?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Athens and Ontario, with oneworld being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Athens to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Athens to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Athens to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Athens is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Athens to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Athens with another airline. Booking your flights between Athens and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Athens to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Athens up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airline flying from Athens to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Athens to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Athens to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8790 reviews
7.7Boarding
7.3Comfort
7.0Entertainment
6.6Food
8.1Crew
Airline reviews

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

8.0 ExcellentLawrence, Jun 2025HNL - SFO
Read more United Airlines reviews

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

United out of SFO is having issues with catering so none of our meals were loaded on the plane and no offer of compensation for our tickets purchased was offered.

Its good expeince but in enternteiment please be like you tube the music i like or movie

I needed to make changes to my flights. When I called customer service, they assisted me with care professionalism.

A bit rush for transit. Food and entertainment are not available

Wonderful and fast TSA checkpoint. The line was fast and our gate was close by

The gate was too far away for the connecting flight

Generally good. The aisles have gotten narrower which can slow down boarding. Flight crew was great! Healthier complimentary snacks would be appreciated. Due to earthquake in San Francisco we had to circle in air space for a bit but then had a smooth landing. I laud the flight crew for their patience ;)

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

Information on your arrival and departure airports

Athens (ATH)
Ontario (ONT)

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