What is the cheapest airline that flies from Ontario to Athens Eleftherios V.?

United Airlines, Air Canada, and KLM are the most popular carriers operating from Ontario to Athens Eleftherios V.

What airlines fly to Athens?

United Airlines, Turkish Airlines and British Airways are the top three most popular airlines that fly to Athens from Ontario according to our data. United Airlines is the first choice among our users, with 28% of people opting to fly with this airline when traveling to Athens. Keep in mind that there are 19 different airlines that fly to Athens on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Ontario Airport to Athens Eleftherios V. Airport?

Prices for flights from Ontario Airport to Athens Eleftherios V. Airport are refreshed on a daily basis.

How old do you have to be to fly from Ontario Airport to Athens Eleftherios V. Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Athens Eleftherios V. Airport.

What documentation or ID do you need to fly to Athens Eleftherios V. Airport?

The required travel and health documents for your Athens Eleftherios V. Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Athens Eleftherios V. Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$378 Cheap Flights from Ontario to Athens in 2026/27

Find the cheapest flights from Ontario to Athens

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:19 pm - 7:35 amONT Ontario-ATH Athens Eleftherios V.

33h 16m2 stops Atlanta Hartsfield-Jackson Boston Logan Intl

1:10 pm - 11:55 pmATH Athens Eleftherios V.-ONT Ontario

20h 45m2 stops Boston Logan Intl Salt Lake City

$653Delta

Mon, Oct 5 - Wed, Oct 21

7:05 am - 11:00 amONT Ontario-ATH Athens Eleftherios V.

17h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 8:25 pmATH Athens Eleftherios V.-ONT Ontario

20h 40m1 stop Atlanta Hartsfield-Jackson

$663Delta

Sun, Sep 27 - Wed, Oct 21

12:00 pm - 4:30 pmONT Ontario-ATH Athens Eleftherios V.

18h 30m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

6:10 am - 4:12 pmATH Athens Eleftherios V.-ONT Ontario

20h 02m2 stops Amsterdam Schiphol Salt Lake City

$694KLM

Wed, Feb 3 - Wed, Feb 10

5:15 pm - 7:50 amONT Ontario-ATH Athens Eleftherios V.

28h 35m2 stops Salt Lake City New York John F Kennedy Intl

6:35 am - 5:12 pmATH Athens Eleftherios V.-ONT Ontario

20h 37m2 stops Paris Charles de Gaulle Seattle/Tacoma Intl

$695Delta

Sat, Oct 3 - Tue, Oct 13

7:07 am - 11:00 amONT Ontario-ATH Athens Eleftherios V.

17h 53m1 stop Atlanta Hartsfield-Jackson

9:45 am - 8:25 pmATH Athens Eleftherios V.-ONT Ontario

20h 40m1 stop Atlanta Hartsfield-Jackson

$698Delta

Fri, Oct 16 - Wed, Oct 21

7:05 am - 9:20 amONT Ontario-ATH Athens Eleftherios V.

16h 15m1 stop Atlanta Hartsfield-Jackson

9:45 am - 8:25 pmATH Athens Eleftherios V.-ONT Ontario

20h 40m1 stop Atlanta Hartsfield-Jackson

$723Delta

Sat, Sep 26 - Wed, Oct 21

11:56 am - 5:40 pmONT Ontario-ATH Athens Eleftherios V.

20h 44m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle

6:10 am - 10:43 pmATH Athens Eleftherios V.-ONT Ontario

26h 33m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$728Delta

Thu, Oct 29 - Thu, Nov 5

12:00 pm - 4:30 pmONT Ontario-ATH Athens Eleftherios V.

18h 30m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

5:55 am - 4:12 pmATH Athens Eleftherios V.-ONT Ontario

20h 17m2 stops Amsterdam Schiphol Salt Lake City

$744KLM

Wed, Jan 20 - Sun, Jan 31

11:10 pm - 11:10 amONT Ontario-ATH Athens Eleftherios V.

26h 00m1 stop Charlotte Douglas

1:00 pm - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

19h 59m1 stop Charlotte Douglas

$783American Airlines

Mon, Oct 5 - Wed, Oct 21

12:00 pm - 4:30 pmONT Ontario-ATH Athens Eleftherios V.

18h 30m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

5:55 am - 4:12 pmATH Athens Eleftherios V.-ONT Ontario

20h 17m2 stops Amsterdam Schiphol Salt Lake City

$794KLM

Fri, Jan 22 - Sun, Jan 31

Cheap last minute flights

Enter your travel dates to find the best prices.

7:05 am - 10:00 amONT Ontario-ATH Athens Eleftherios V.

16h 55m1 stop Atlanta Hartsfield-Jackson

6:10 am - 4:22 pmATH Athens Eleftherios V.-ONT Ontario

20h 12m2 stops Amsterdam Schiphol Salt Lake City

$1,398KLM

Thu, Sep 17 - Tue, Dec 15

7:05 am - 10:00 amONT Ontario-ATH Athens Eleftherios V.

16h 55m1 stop Atlanta Hartsfield-Jackson

6:10 am - 4:22 pmATH Athens Eleftherios V.-ONT Ontario

20h 12m2 stops Amsterdam Schiphol Salt Lake City

$1,443KLM

Thu, Sep 17 - Tue, Dec 15

7:05 am - 10:00 amONT Ontario-ATH Athens Eleftherios V.

16h 55m1 stop Atlanta Hartsfield-Jackson

6:10 am - 4:22 pmATH Athens Eleftherios V.-ONT Ontario

20h 12m2 stops Amsterdam Schiphol Salt Lake City

$1,526KLM

Thu, Sep 17 - Tue, Dec 15

7:00 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

17h 35m1 stop Chicago O'Hare Intl

9:35 am - 10:49 pmATH Athens Eleftherios V.-ONT Ontario

23h 14m1 stop Chicago O'Hare Intl

$1,627United Airlines

Fri, Sep 18 - Sun, Sep 27

7:05 am - 11:00 amONT Ontario-ATH Athens Eleftherios V.

17h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 6:41 pmATH Athens Eleftherios V.-ONT Ontario

18h 56m1 stop Atlanta Hartsfield-Jackson

$1,640Air France

Mon, Sep 21 - Sat, Sep 26

7:00 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

17h 35m1 stop Chicago O'Hare Intl

12:10 pm - 12:50 pmATH Athens Eleftherios V.-ONT Ontario

34h 40m2 stops Montreal Pierre Elliott Trudeau Intl Denver Intl

$1,748United Airlines

Fri, Sep 18 - Sun, Sep 20

7:00 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

17h 35m1 stop Chicago O'Hare Intl

12:35 pm - 10:49 pmATH Athens Eleftherios V.-ONT Ontario

20h 14m1 stop Chicago O'Hare Intl

$1,772United Airlines

Fri, Sep 18 - Mon, Sep 28

7:05 am - 10:00 amONT Ontario-ATH Athens Eleftherios V.

16h 55m1 stop Atlanta Hartsfield-Jackson

9:45 am - 6:15 pmATH Athens Eleftherios V.-ONT Ontario

18h 30m1 stop Atlanta Hartsfield-Jackson

$1,837KLM

Thu, Sep 17 - Mon, Oct 5

7:00 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

17h 35m1 stop Chicago O'Hare Intl

12:10 pm - 8:58 pmATH Athens Eleftherios V.-ONT Ontario

18h 48m2 stops Montreal Pierre Elliott Trudeau Intl Denver Intl

$1,882United Airlines

Fri, Sep 18 - Sun, Sep 27

10:39 pm - 8:55 amONT Ontario-ATH Athens Eleftherios V.

24h 16m2 stops New York John F Kennedy Intl Belgrade Nikola Tesla

4:25 am - 8:59 pmATH Athens Eleftherios V.-ONT Ontario

26h 34m2 stops Belgrade Nikola Tesla New York John F Kennedy Intl

$1,939Air Serbia

Tue, Sep 22 - Mon, Oct 5

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Delta flights from Ontario to Athens

Our best Delta deals on Ontario to Athens flight tickets

Delta

Oct 5

ONT12:19 pmOntario

33h 16m

2 stops

ATH7:35 amAthens Eleftherios V.

Oct 21

ATH9:45 amAthens Eleftherios V.

20h 40m

1 stop

ONT8:25 pmOntario

$653

Delta

Sep 27

ONT7:05 amOntario

17h 55m

1 stop

ATH11:00 amAthens Eleftherios V.

Oct 21

ATH9:45 amAthens Eleftherios V.

20h 40m

1 stop

ONT8:25 pmOntario

$663

Delta

Oct 3

ONT5:15 pmOntario

28h 35m

2 stops

ATH7:50 amAthens Eleftherios V.

Oct 13

ATH6:35 amAthens Eleftherios V.

20h 37m

2 stops

ONT5:12 pmOntario

$695

United Airlines flights from Ontario to Athens

Our best United Airlines deals on Ontario to Athens flight tickets

United Airlines

Mar 2

ONT6:53 pmOntario

30h 07m

3 stops

ATH11:00 amAthens Eleftherios V.

Mar 5

ATH6:45 amAthens Eleftherios V.

23h 35m

2 stops

ONT8:20 pmOntario

$837

United Airlines

Oct 11

ONT7:00 amOntario

17h 35m

1 stop

ATH10:35 amAthens Eleftherios V.

Oct 20

ATH12:35 pmAthens Eleftherios V.

20h 14m

1 stop

ONT10:49 pmOntario

$844

United Airlines

Mar 2

ONT6:30 amOntario

28h 50m

2 stops

ATH9:20 pmAthens Eleftherios V.

Mar 5

ATH6:45 amAthens Eleftherios V.

23h 35m

2 stops

ONT8:20 pmOntario

$854

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 10/5

12:19 pm-7:35 am

2 stops33h 16m

Athens Eleftherios V.

Wed 10/21

1:10 pm-11:55 pm

2 stops20h 45m

$653

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 9/27

7:05 am-11:00 am

1 stop17h 55m

Athens Eleftherios V.

Wed 10/21

9:45 am-8:25 pm

1 stop20h 40m

$663

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 2/3

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Wed 2/10

6:10 am-4:12 pm

2 stops20h 02m

$694

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sat 10/3

5:15 pm-7:50 am

2 stops28h 35m

Athens Eleftherios V.

Tue 10/13

6:35 am-5:12 pm

2 stops20h 37m

$695

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Fri 10/16

7:07 am-11:00 am

1 stop17h 53m

Athens Eleftherios V.

Wed 10/21

9:45 am-8:25 pm

1 stop20h 40m

$698

Quickest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sat 9/26

7:05 am-9:20 am

1 stop16h 15m

Athens Eleftherios V.

Wed 10/21

9:45 am-8:25 pm

1 stop20h 40m

$723

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Thu 10/29

11:56 am-5:40 pm

2 stops20h 44m

Athens Eleftherios V.

Thu 11/5

6:10 am-10:43 pm

2 stops26h 33m

$728

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 1/20

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Sun 1/31

5:55 am-4:12 pm

2 stops20h 17m

$744

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 10/5

11:10 pm-11:10 am

1 stop26h 00m

Athens Eleftherios V.

Wed 10/21

1:00 pm-10:59 pm

1 stop19h 59m

$783

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Fri 1/22

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Sun 1/31

5:55 am-4:12 pm

2 stops20h 17m

$794

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Athens

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest time of day to depart on your flight to Athens?

The cheapest time of day to fly to Athens is in the evening when flights can be purchased for as low as $531. Flights to Athens are more costly at noon, with an average ticket price of $838. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Ontario to Athens flights?

You could potentially save up to 35% on your flight if you consider stops on a Ontario to Athens flight.

When to book flights from Ontario to Athens

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Athens according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Ontario to Athens (ONT to ATH) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Athens

Best Price Found	$378
Fastest flight time	16h 55m
Direct flights	None

The best one-way flight to Athens from Ontario in the past 72 hours is $378. The best round-trip flight deal from Ontario to Athens found on momondo in the last 72 hours is $653.

The fastest flight from Ontario to Athens takes 16h 55m

There are no direct flights from Ontario to Athens. There are no popular flight routes from Ontario to Athens.

Search flight deals

Frequently asked questions about flying from Ontario to Athens

How far is Ontario to Athens Eleftherios V. by plane?
The distance between Ontario and Athens Eleftherios V. is about 6871.5 mi. A reasonable flight in good conditions will take 16h 55m.
When did momondo last update prices for flights from Ontario Airport to Athens Eleftherios V. Airport?
Prices for flights from Ontario Airport to Athens Eleftherios V. Airport are refreshed on a daily basis.
How old do you have to be to fly from Ontario Airport to Athens Eleftherios V. Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Athens Eleftherios V. Airport.
What documentation or ID do you need to fly to Athens Eleftherios V. Airport?
The required travel and health documents for your Athens Eleftherios V. Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Athens Eleftherios V. Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Piraeus

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Hydra

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Corinth

Aegina

Skala

Chalcis

Porto Cheli

Marathon

Tolo

Megalochori

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Galaxidi

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Athens?

It is quick and easy to find Ontario to Athens flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Athens that suits you.

Can I find flights from Ontario to Athens with flexible booking policies on momondo?

Flights from Ontario to Athens with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to Athens?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Athens from Ontario.

I’m not ready to book a flight from Ontario to Athens right now. Can momondo alert me if prices change?

Price alerts on flights to Athens from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.