ONT - ATH

$368 Find Cheap Flights from Ontario to Athens

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Athens departing on 7/29. 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, 0 bags

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Athens, 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 Ontario to Athens, as well as popular online travel agencies
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41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$811
Typical prices: $764-$647
British Airways
Wed 8/19Wed 9/2
ONT - ATH • 2 stops
Cheapest one-way
$368
British Airways
Wed 7/29
ONT - ATH • 1 stop
Top airlines
British Airways
Cheapest • from $811 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Athens. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Dallas (DFW)
Cheapest • Avg $1,288 (round-trip)
Atlanta (ATL)
Shortest trip • 17h 57m (one-way)
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 100% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Athens 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 Ontario to Athens

Wed, Aug 19 - Wed, Sep 2
British Airways Logo
10:29 am - 7:00 pm
ONT
-
ATH
22h 31m
2 stops
British Airways Logo
2:00 pm - 10:58 pm
ATH
-
ONT
18h 58m
1 stop
$811British Airways
Tue, Aug 11 - Wed, Sep 2
British Airways Logo
7:06 am - 11:45 am
ONT
-
ATH
18h 39m
1 stop
British Airways Logo
2:00 pm - 10:58 pm
ATH
-
ONT
18h 58m
1 stop
$815British Airways
Wed, Aug 19 - Wed, Sep 2
British Airways Logo
7:06 am - 11:45 am
ONT
-
ATH
18h 39m
1 stop
British Airways Logo
2:00 pm - 10:58 pm
ATH
-
ONT
18h 58m
1 stop
$820British Airways
Sun, Aug 16 - Fri, Sep 4
British Airways Logo
7:06 am - 11:45 am
ONT
-
ATH
18h 39m
1 stop
British Airways Logo
2:00 pm - 9:34 am
ATH
-
ONT
29h 34m
1 stop
$821British Airways
Sun, Aug 16 - Fri, Sep 4
Air Canada Logo
5:00 am - 1:25 pm
ONT
-
ATH
22h 25m
2 stops
Air Canada Logo
3:25 pm - 12:38 pm
ATH
-
ONT
31h 13m
2 stops
$841Air Canada
Mon, Oct 12 - Tue, Oct 20
United Airlines Logo
7:00 am - 10:35 am
ONT
-
ATH
17h 35m
1 stop
United Airlines Logo
12:35 pm - 10:26 pm
ATH
-
ONT
19h 51m
1 stop
$844United Airlines
Mon, Aug 17 - Fri, Sep 4
Air Canada Logo
5:00 am - 11:10 am
ONT
-
ATH
20h 10m
2 stops
Air Canada Logo
3:25 pm - 12:38 pm
ATH
-
ONT
31h 13m
2 stops
$846Air Canada
Tue, Sep 1 - Tue, Oct 20
United Airlines Logo
7:00 am - 10:10 am
ONT
-
ATH
17h 10m
2 stops
United Airlines Logo
12:35 pm - 10:26 pm
ATH
-
ONT
19h 51m
1 stop
$848United Airlines
Tue, Sep 1 - Tue, Oct 20
United Airlines Logo
7:00 am - 10:10 am
ONT
-
ATH
17h 10m
2 stops
United Airlines Logo
10:25 am - 8:52 pm
ATH
-
ONT
20h 27m
2 stops
$852United Airlines
Sun, Aug 16 - Wed, Sep 2
British Airways Logo
10:29 am - 6:30 pm
ONT
-
ATH
22h 01m
2 stops
British Airways Logo
2:00 pm - 10:58 pm
ATH
-
ONT
18h 58m
1 stop
$856British Airways
Booking Insights

KAYAK's insights & trends for Ontario to Athens flights

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

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

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Ontario to Athens departing in August.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Athens, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Athens is January, where tickets cost $0 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,325 and $1,071 respectively.

Find deals

Good to know

Low seasonFebruary
Cheapest flight$368
Best time to beat the crowds with an average 35% drop in price.
Most popular time to fly and prices are also 4% lower on average.
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
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 Ontario to Athens

  • What is the cheapest flight from Ontario to Athens?

    In the last 3 days, the lowest price for a flight from Ontario to Athens was $368 for a one-way ticket and $811 for a round-trip.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in Ontario and on arrival in Athens.

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

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

  • Which airline alliances offer flights from Ontario to Athens?

    Star Alliance is the only airline alliance operating flights between Ontario and Athens.

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

    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 Ontario to Athens.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Athens from Ontario 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 Ontario to Athens?

    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 Athens with an airline and back to Ontario with another airline. Booking your flights between Ontario and ATH 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 Ontario to Athens?

    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 Athens from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to Athens

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Athens. 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 Ontario to Athens? 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 9680 reviews
7.3Comfort
7.7Boarding
7.1Entertainment
8.1Crew
6.6Food
Airline reviews

Some crew were unfriendly or in some cases just straight up rude.

6.0 GoodAnonymous, Apr 2026
SFO - YVR
Read more United Airlines reviews

Some crew were unfriendly or in some cases just straight up rude.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

Flight itself excellent, but delayed so missed connection & got to destination 2 hrs later

Due to cancellation of connecting flight (Lufthansa) I didn’t fly with United

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

It was perfect! I've never flown with United before, but I definitely will in the future

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

Information on your arrival and departure airports

Ontario (ONT)
Athens (ATH)