ATH - ONT

$668 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 6/3. 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

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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Cheap Flight Deals 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.

Recent round-trip flight deals from Athens to Ontario

KAYAK's recommended round-trip deals from the most popular airlines that fly from Athens to Ontario.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
1:10 pm - 11:05 amATH-ONT
31h 55m2 stops
6:10 am - 9:55 amONT-ATH
41h 45m2 stops
$845United Airlines
Find Deal
Tue, Apr 8 - Fri, Apr 18
1:10 pm - 11:05 amATH-ONT
31h 55m2 stops
4:17 pm - 8:10 amONT-ATH
29h 53m2 stops
$846United Airlines
Find Deal
Tue, Apr 8 - Fri, Apr 18
10:30 am - 11:29 amATH-ONT
34h 59m1 stop
5:45 am - 7:35 pmONT-ATH
27h 50m2 stops
$853Delta
Find Deal
Tue, Apr 8 - Fri, Apr 18
6:00 am - 10:24 pmATH-ONT
26h 24m2 stops
7:00 am - 10:55 amONT-ATH
17h 55m1 stop
$855KLM
Find Deal
Tue, Apr 8 - Fri, Apr 18
10:30 am - 10:36 pmATH-ONT
22h 06m1 stop
10:15 pm - 10:55 amONT-ATH
26h 40m1 stop
$856KLM
Find Deal
Tue, Apr 8 - Fri, Apr 18
10:30 am - 10:36 pmATH-ONT
22h 06m1 stop
7:00 am - 10:55 amONT-ATH
17h 55m1 stop
$857KLM
Find Deal
Tue, Apr 8 - Fri, Apr 18
3:40 pm - 9:41 pmATH-ONT
40h 01m2 stops
11:00 pm - 3:40 pmONT-ATH
30h 40m2 stops
$1,059Air Serbia
Find Deal
Sun, Sep 21 - Sun, Sep 28
10:30 am - 10:36 pmATH-ONT
22h 06m1 stop
7:05 am - 10:00 amONT-ATH
16h 55m1 stop
$1,074Delta
Find Deal
Mon, Apr 28 - Mon, May 12
1:10 pm - 12:38 pmATH-ONT
33h 28m3 stops
6:10 am - 11:10 amONT-ATH
19h 00m2 stops
$1,275
Find Deal
Tue, Apr 8 - Fri, Apr 18
1:15 pm - 10:30 pmATH-ONT
43h 15m2 stops
11:45 pm - 3:25 amONT-ATH
41h 40m2 stops
$1,299Air Serbia
Find Deal
Mon, Aug 11 - Sun, Aug 17

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 United Airlines ($845) and Delta ($853).

Good to know

Cheapest flight

$668
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 $668 for a one-way ticket and $845 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.

See more FAQs

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 8605 reviews
7.3Comfort
6.6Food
7.0Entertainment
8.1Crew
7.7Boarding
Airline reviews

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 ;)

8.0 ExcellentMaryann, Mar 2025EWR - SFO
Read more United Airlines reviews

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 ;)

We tried to upgrade to economy premium but were told this was not possible as we had booked through United Airlines (and Air Canada was operating the flight). This seemed silly given there was ample space in economy premium. Additionally, we had to wait almost 1.5 hours upon arrival to taxi to the gate. Otherwise, the crew were very pleasant and passengers were friendly.

headphone jack didnt work for the first flight and not much variety

The agents was very rude and they charged me $50 for a carry-on bag saying that it was too big and then I saw someone going on a plane with the same size bag as me

For the most part united was a good experience, how ever when they came by with the snacks and water, they completely passed by my wife and I. As we were in separate rows. On a 5 hr flight we were not offered water

Fantastic crew. Flight was delayed at last minute but we were given updates every 20 minutes and the crew was so friendly and considerate. I miss the touch screens on the back of the seats, wish they would bring that back though.

Beijing PEK to SFO. I had an economy seat on this flight. The seat comfort was acceptable. My main complaint is with the FA’s lack of personality and absence from servicing the plane, specifically restroom care (I wish I could share a pic of the restroom that I captured) and care of travelers—drink cart/availability of drinks. I'm amazed at the level of service on other International travel where a passenger is most often appreciated.

Great. Food going from Australia to the US was better than other way around, but still needs improvement in terms of quality and quantity!!!

I feel bad, but Swiss airlines is not an airlines I will ever fly again. Their cabins are basic, seats are extremely uncomfortable, crew is a hit or a miss with service. What's worse is how they make you feel they are there to make money and not make your travel needs be met or make your travel a pleasure. They charge for 2nd bags, seat selection and felt like a budget arinines frontier/spirit airline attitude and approach. Their business class is from the early 2000s, basic. Additionally, planes going to India, are old, falling apart and not maintained. Even the crew mentioned this is typical of the airline having older planes going to India. Panels detached and loose or stuck with duct tape, seats scruffed up and dirty, seatbelts roughed up. The scariest thing was when I saw a window panel next to where I was sitting loose and dangling. The crew mentioned it's only cosmetic and assured the integrity of the plane was inspected by the maintenance crew. This is where they confessed about planes going to India being old. I UNFORTUNATELY would NOT recommend Swiss airlines to anyone and will NEVER fly with them again!

The ANA crew and their members were all extremely nice and caring. Shout out to the crews for working on Christmas and New Years. Y'all the real MVP

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

Information on your arrival and departure airports

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