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478 € Cheap Flights from Ontario International to Athens International

Compare Ontario International to Athens International flight deals

Find the cheapest month or even day of the year to fly to Athens International

Book the best Athens International fare with no extra fees

Flight deals from Ontario International to Athens International

Looking for a cheap last-minute deal or the best return flight from Ontario International to Athens International? Find the lowest prices on one-way and return tickets right here.
Athens.478 € per passenger.Departing Sun, 10 Aug, returning Tue, 26 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Sun, 10 Aug, arriving in Athens International.Inbound indirect flight with Delta, departs from Athens International on Tue, 26 Aug, arriving in Ontario International.Price includes taxes and charges.From 478 €, select.
Athens.512 € per passenger.Departing Sat, 17 Jan, returning Sat, 24 Jan.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Ontario International on Sat, 17 Jan, arriving in Athens International.Inbound indirect flight with British Airways, departs from Athens International on Sat, 24 Jan, arriving in Ontario International.Price includes taxes and charges.From 512 €, select.
Athens.530 € per passenger.Departing Fri, 22 Aug, returning Thu, 4 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Fri, 22 Aug, arriving in Athens International.Inbound indirect flight with Delta, departs from Athens International on Thu, 4 Sep, arriving in Ontario International.Price includes taxes and charges.From 530 €, select.
Athens.535 € per passenger.Departing Thu, 20 Nov, returning Tue, 25 Nov.Return flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Thu, 20 Nov, arriving in Athens International.Inbound indirect flight with Delta, departs from Athens International on Tue, 25 Nov, arriving in Ontario International.Price includes taxes and charges.From 535 €, select.
Athens.557 € per passenger.Departing Wed, 3 Sep, returning Sun, 21 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Wed, 3 Sep, arriving in Athens International.Inbound indirect flight with Delta, departs from Athens International on Sun, 21 Sep, arriving in Ontario International.Price includes taxes and charges.From 557 €, select.
Athens.634 € per passenger.Departing Fri, 30 Jan, returning Wed, 4 Feb.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Fri, 30 Jan, arriving in Athens International.Inbound indirect flight with Iberia, departs from Athens International on Wed, 4 Feb, arriving in Ontario International.Price includes taxes and charges.From 634 €, select.
Athens.687 € per passenger.Departing Fri, 28 Nov, returning Fri, 5 Dec.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Ontario International on Fri, 28 Nov, arriving in Athens International.Inbound indirect flight with British Airways, departs from Athens International on Fri, 5 Dec, arriving in Ontario International.Price includes taxes and charges.From 687 €, select.
Athens.711 € per passenger.Departing Tue, 3 Feb, returning Wed, 11 Feb.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Ontario International on Tue, 3 Feb, arriving in Athens International.Inbound indirect flight with British Airways, departs from Athens International on Wed, 11 Feb, arriving in Ontario International.Price includes taxes and charges.From 711 €, select.

Find the cheapest month to fly from Ontario International to Athens International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Athens International flights are currently cheapest in August.
Jul
from 1.114 €
Aug
from 478 €
Sep
from 557 €
Oct
from 1.143 €
Nov
from 535 €
Dec
from 945 €
Jan
from 512 €
Feb
from 711 €
Mar
from 740 €
Apr
Find prices
May
Find prices
Jun
Find prices

Ontario International to Athens International: Alternative routes

Compare routes from Ontario International to Athens below. You may find an airport to fly into that's cheaper, faster, or easier than Athens International.

Ontario to Athens: Flight information

The things to know before you go.
Cheapest flight found478 €
Cheapest month to flyAugust

Finding cheap flights from Ontario International to Athens International: Frequently asked questions

The best price we found for a return flight from Ontario International to Athens International is 478 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Ontario International to Athens International. But we found flights with one or more stops from 478 €.
As of July 2025, there are no flights flying from Ontario International to Athens International.
The cheapest month to fly from Ontario International to Athens International is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Athens International Airport on Sunday, 10 August 2025.
No airlines currently offer direct flights between Ontario International Airport and Athens International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Athens International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Athens is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Delta offers the cheapest flight tickets to Athens International.

Travelling from Ontario International Airport (ONT) to Eleftherios Venizelos International Airport (ATH): what you need to know

  • The timezone in Athens is UTC+2, which is nine hours ahead of Ontario.

  • For a smooth journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This will give you enough time to catch your ONT to ATH flight.

  • Flying during a peak month such as August? Public holidays and other high seasons can result in longer queues at airport checkpoints. Play it safe and arrive up to four hours ahead of international flights and two hours before a domestic departure.

  • Enjoy a quick visit to another city or simply break up your journey with a stopover. Just deselect 'Direct flights only' to see your options when searching for tickets from Ontario International Airport to Eleftherios Venizelos International Airport. Many passengers pass through Hartsfield-Jackson Atlanta International Airport on this route.

How to find the cheapest flights from Ontario International Airport (ONT) to Eleftherios Venizelos International Airport (ATH)

  • 283 € is currently the best price for a one-way Ontario International Airport to Eleftherios Venizelos International Airport flight. A return flight starts at 478 €. These fares may change depending on availability.

  • It's usually smart to book early if you're hoping to get cheap tickets from ONT to ATH. That's because airlines adjust prices based on demand, which tends to increase closer to departure.

  • If you can be flexible with your trip dates, try using the 'Whole month' search function. It'll show you the lowest price in each month when looking for your flight from Ontario International Airport to Eleftherios Venizelos International Airport.

  • You don't need to check every day to find out if fares have gone down when you set up a Price Alert. We'll send you an update as soon as the price changes on cheap flights from ONT to ATH.

  • Pick your ideal arrival and departure times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to see the best deals on flights from Ontario International Airport to Eleftherios Venizelos International Airport.

Handy information about Ontario International Airport (ONT)

  • ONT is located at 2900 E. Airport Drive.

  • 83.6% of flights leaving Ontario International Airport touch down at their destination as planned. Given its strong performance rating, you're unlikely to face delays when setting off from ONT.

  • To reach Ontario International Airport from central Ontario, it takes about 10 minutes if you're planning to drive. This depends on traffic though. It's approximately 6 kilometres from the airport to the city centre.

  • Planning to take public transport? Expect a journey time of around 1 hour 30 minutes.

  • Get your journey off to a stress-free start by staying near ONT. Whether you've booked an early flight from Ontario International Airport to Eleftherios Venizelos International Airport or just don't like being rushed, these hotels are perfect:

Arriving at Eleftherios Venizelos International Airport (ATH)

  • Consider staying in a hotel close to ATH if you're on a late Ontario International Airport to Eleftherios Venizelos International Airport flight. Choose one of these accommodation options and make your arrival easier:

  • Grab an Eleftherios Venizelos International Airport rental car and explore Athens and beyond with your own set of wheels. Centauro, Green Motion and Surprice are popular providers to choose from here.

  • To get the lowest price, book your vehicle from Eleftherios Venizelos International Airport about three weeks in advance.

Getting from Eleftherios Venizelos International Airport (ATH) to central Athens

  • Eleftherios Venizelos International Airport to central Athens has a drive time of around 35 minutes. It's approximately 40 kilometres away.

  • Travelling on public transport will take you roughly 1 hour.

When to fly to Eleftherios Venizelos International Airport (ATH)

  • The quietest month for a flight from Ontario International Airport to Eleftherios Venizelos International Airport is January, while July is the most popular. Pick the ideal time to go to Athens based on whether you prefer a more relaxed vibe or a faster pace.

  • The warmest month in Athens is July, with the temperature ranging between 22ºC (72ºF) and 37ºC (99ºF). Lock in your flights from Ontario International Airport to Eleftherios Venizelos International Airport in this month if this is the kind of weather you like.

  • If you like travelling in cooler conditions, look for a cheap ticket from ONT to ATH in January. Average temperatures are between 4ºC (39ºF) and 14ºC (57ºF) then.

Explore more of Greece

  • You've visited Athens, now it's time to discover more of Greece. Journey about 306 kilometres north to Thessaloniki to check off its must-visit sights. From Arch of Galerius to Aristotelous Square and Museum of Byzantine Culture, there's plenty to keep you on the go.

  • If you're ready to explore another side of Greece, consider Larisa, roughly 209 kilometres north-west of Athens. Agioi Saranta, Saint George Orthodox Church and Second Ancient Theatre are key reasons to visit.

Plan the rest of your trip from Ontario to Athens

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.