ONT - ATH

$268 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 7/19. 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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Everything you should know

Cheapest round-trip
$557
Typical prices: $896-$1,090
United Airlines
Mon 3/16Thu 4/2
ONT - ATH • 2 stops
Cheapest one-way
$268
Air Canada
Sun 7/19
ONT - ATH • 2 stops
Top airlines
United Airlines
Cheapest • from $557 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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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

Mon, Mar 16 - Thu, Apr 2
United Airlines Logo
1:50 pm - 4:35 pm
ONT
-
ATH
17h 45m
2 stops
United Airlines Logo
12:45 pm - 10:45 pm
ATH
-
ONT
20h 00m
2 stops
$557United Airlines
Tue, Mar 10 - Tue, Mar 17
British Airways Logo
3:19 pm - 7:30 pm
ONT
-
ATH
19h 11m
2 stops
British Airways Logo
4:55 pm - 9:24 pm
ATH
-
ONT
37h 29m
2 stops
$568British Airways
Sat, Mar 21 - Fri, Apr 3
United Airlines Logo
11:59 pm - 9:05 am
ONT
-
ATH
24h 06m
2 stops
United Airlines Logo
6:00 am - 12:38 pm
ATH
-
ONT
40h 38m
2 stops
$571United Airlines
Mon, Aug 10 - Mon, Nov 23
British Airways Logo
11:59 pm - 11:45 am
ONT
-
ATH
25h 46m
1 stop
British Airways Logo
4:55 pm - 9:59 pm
ATH
-
ONT
39h 04m
2 stops
$588British Airways
Sun, May 10 - Wed, May 20
United Airlines Logo
5:00 am - 10:10 am
ONT
-
ATH
19h 10m
2 stops
United Airlines Logo
12:35 pm - 10:30 pm
ATH
-
ONT
19h 55m
1 stop
$598United Airlines
Sun, May 10 - Mon, May 18
British Airways Logo
4:52 pm - 2:15 am
ONT
-
ATH
23h 23m
2 stops
British Airways Logo
8:50 pm - 6:24 pm
ATH
-
ONT
31h 34m
2 stops
$610British Airways
Tue, May 12 - Tue, May 26
British Airways Logo
4:52 pm - 2:10 am
ONT
-
ATH
23h 18m
2 stops
British Airways Logo
8:00 pm - 9:57 pm
ATH
-
ONT
35h 57m
2 stops
$611British Airways
Wed, May 6 - Thu, May 21
United Airlines Logo
1:30 pm - 11:05 pm
ONT
-
ATH
23h 35m
2 stops
United Airlines Logo
1:10 pm - 10:28 pm
ATH
-
ONT
43h 18m
2 stops
$617United Airlines
Mon, Mar 30 - Wed, Apr 8
British Airways Logo
5:02 pm - 1:10 pm
ONT
-
ATH
34h 08m
2 stops
British Airways Logo
7:30 am - 11:46 pm
ATH
-
ONT
26h 16m
2 stops
$618British Airways
Mon, Apr 27 - Tue, May 19
British Airways Logo
2:08 pm - 2:10 am
ONT
-
ATH
26h 02m
2 stops
British Airways Logo
6:30 pm - 4:22 pm
ATH
-
ONT
31h 52m
2 stops
$625British 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 March.

Good to know

Low seasonFebruary
Cheapest flight$268
Best time to beat the crowds with an average 42% drop in price.
Most popular time to fly with an average 70% increase in price.
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 $268 for a one-way ticket and $557 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 9276 reviews
6.6Food
7.7Boarding
8.1Crew
7.1Entertainment
7.3Comfort
Airline reviews

Check-in and in-flight staff were better than average. The seat was a fair size but too hard and not enough padding. The cushion/pillow provided is poor (thin and seems to be disposable ,it provides no effective cushioning or support). Food was OK-ish but no choice of inflight snacks and no easy place to get drinks other than water (I could ask for juice by intruding into the staff area at the back of the plane) Entertainment was very good actually. Overall better than I expected from a US-based airline (sorry!) but compared to ANA or Singapore it was so-so. (I live in Japan so they are my comparative airlines)

6.0 GoodMike, Feb 2026
LAX - NRT
Read more United Airlines reviews

Check-in and in-flight staff were better than average. The seat was a fair size but too hard and not enough padding. The cushion/pillow provided is poor (thin and seems to be disposable ,it provides no effective cushioning or support). Food was OK-ish but no choice of inflight snacks and no easy place to get drinks other than water (I could ask for juice by intruding into the staff area at the back of the plane) Entertainment was very good actually. Overall better than I expected from a US-based airline (sorry!) but compared to ANA or Singapore it was so-so. (I live in Japan so they are my comparative airlines)

Terrible. Our first time back on United for 10 years, the seats in Polaris class are small and uncomfortable. They have squished too many people in to get more $$$. The staff are not friendly and not wanting to accommodate. I asked for two salads rather than a main meal and was advised no we wont do that. Then asked what I would like for breakfast and given something else anyway. I will not be flying United International anytime soon.

The food was terrible this time. Otherwise pleasant, quiet, on-time.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

The flight crew where really good. Better then the crew from BNE to SFO

Food should be changed in menu Many muslims travels in this airlime they need to add one Halal meal

left on time, reasonable boarding process arrived early luggage came out quickly

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

It was great with United overall except for two things. 1) It was a 5-hour flight and we were with kids, so we were asking for extra snacks. They were extremely reticent to dole them out even though there wasn't any meal and the kids were starting to hit their limit towards the end. 2) Baggage didn't arrive until 80 minutes after we landed.

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

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

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