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

United Airlines, Delta, and British Airways 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 18 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.

$371 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.

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

18h 00m1 stop Atlanta Hartsfield-Jackson

9:45 am - 10:14 pmATH Athens Eleftherios V.-ONT Ontario

22h 29m1 stop Atlanta Hartsfield-Jackson

$818Multiple Airlines

Sun, Mar 28 - Tue, Apr 6

2:21 pm - 1:00 amONT Ontario-ATH Athens Eleftherios V.

24h 39m2 stops Dallas/Fort Worth London Heathrow

7:55 am - 11:13 pmATH Athens Eleftherios V.-ONT Ontario

25h 18m2 stops London Heathrow Dallas/Fort Worth

$826British Airways

Wed, Jan 27 - Wed, Feb 3

4:19 pm - 11:20 pmONT Ontario-ATH Athens Eleftherios V.

21h 01m2 stops Phoenix Sky Harbor Intl London Heathrow

8:20 pm - 10:08 pmATH Athens Eleftherios V.-ONT Ontario

35h 48m2 stops London Heathrow Phoenix Sky Harbor Intl

$832British Airways

Mon, Feb 1 - Mon, Feb 15

1:24 pm - 11:20 pmONT Ontario-ATH Athens Eleftherios V.

23h 56m2 stops Phoenix Sky Harbor Intl London Heathrow

7:55 am - 11:13 pmATH Athens Eleftherios V.-ONT Ontario

25h 18m2 stops London Heathrow Dallas/Fort Worth

$832British Airways

Mon, Feb 1 - Wed, Feb 10

7:00 am - 1:40 pmONT Ontario-ATH Athens Eleftherios V.

20h 40m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:25 pm - 4:12 pmATH Athens Eleftherios V.-ONT Ontario

32h 47m2 stops Amsterdam Schiphol Salt Lake City

$838Multiple Airlines

Wed, Jan 27 - Tue, Feb 2

7:00 am - 1:40 pmONT Ontario-ATH Athens Eleftherios V.

20h 40m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:25 pm - 10:43 pmATH Athens Eleftherios V.-ONT Ontario

39h 18m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$838Multiple Airlines

Sun, Jan 17 - Tue, Jan 26

7:00 am - 1:40 pmONT Ontario-ATH Athens Eleftherios V.

20h 40m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

6:10 am - 10:14 pmATH Athens Eleftherios V.-ONT Ontario

26h 04m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$838Multiple Airlines

Wed, Jan 27 - Thu, Feb 4

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

$842KLM

Wed, Feb 3 - Wed, Feb 17

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

$842KLM

Wed, Feb 3 - Wed, Feb 10

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

$842KLM

Tue, Feb 2 - Tue, Feb 16

Cheap last minute flights

Enter your travel dates to find the best prices.

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

$1,033United Airlines

Tue, Oct 6 - Mon, Oct 19

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

$1,069United Airlines

Mon, Oct 5 - Wed, Oct 21

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

17h 53m1 stop Atlanta Hartsfield-Jackson

9:45 am - 6:22 pmATH Athens Eleftherios V.-ONT Ontario

18h 37m1 stop Atlanta Hartsfield-Jackson

$1,069Delta

Tue, Oct 6 - Thu, Oct 15

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

17h 53m1 stop Atlanta Hartsfield-Jackson

6:00 am - 10:43 pmATH Athens Eleftherios V.-ONT Ontario

26h 43m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,073Delta

Tue, Oct 6 - Thu, Oct 15

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

17h 53m1 stop Atlanta Hartsfield-Jackson

6:00 am - 5:12 pmATH Athens Eleftherios V.-ONT Ontario

21h 12m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,073Delta

Tue, Oct 6 - Wed, Oct 14

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

17h 53m1 stop Atlanta Hartsfield-Jackson

6:00 am - 5:12 pmATH Athens Eleftherios V.-ONT Ontario

21h 12m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,073Delta

Tue, Oct 6 - Tue, Oct 13

1:52 pm - 8:10 amONT Ontario-ATH Athens Eleftherios V.

32h 18m2 stops San Francisco Newark

11:45 am - 10:49 pmATH Athens Eleftherios V.-ONT Ontario

21h 04m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl

$1,074United Airlines

Sat, Oct 10 - Wed, Oct 21

7:00 am - 10:30 amONT Ontario-ATH Athens Eleftherios V.

17h 30m1 stop Chicago O'Hare Intl

6:40 am - 5:47 pmATH Athens Eleftherios V.-ONT Ontario

21h 07m2 stops Munich Franz Josef Strauss San Francisco

$1,074United Airlines

Wed, Oct 7 - Fri, Jan 8

11:10 am - 8:10 amONT Ontario-ATH Athens Eleftherios V.

35h 00m2 stops San Francisco Newark

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

20h 14m1 stop Chicago O'Hare Intl

$1,074United Airlines

Sat, Oct 10 - Tue, Oct 20

1:52 pm - 8:10 amONT Ontario-ATH Athens Eleftherios V.

32h 18m2 stops San Francisco Newark

11:45 am - 10:49 pmATH Athens Eleftherios V.-ONT Ontario

21h 04m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl

$1,074United Airlines

Sat, Oct 10 - Tue, Oct 20

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United Airlines flights from Ontario to Athens

Our best United Airlines deals on Ontario to Athens flight tickets

United Airlines

Mar 2

ONT6:00 amOntario

24h 30m

2 stops

ATH4:30 pmAthens Eleftherios V.

Mar 5

ATH6:45 amAthens Eleftherios V.

23h 35m

2 stops

ONT8:20 pmOntario

$852

United Airlines

Jan 16

ONT1:00 pmOntario

41h 30m

2 stops

ATH4:30 pmAthens Eleftherios V.

Jan 27

ATH7:05 amAthens Eleftherios V.

23h 15m

3 stops

ONT8:20 pmOntario

$857

United Airlines

Nov 22

ONT4:17 pmOntario

19h 03m

2 stops

ATH9:20 pmAthens Eleftherios V.

Dec 2

ATH7:05 amAthens Eleftherios V.

23h 33m

2 stops

ONT8:38 pmOntario

$865

Delta flights from Ontario to Athens

Our best Delta deals on Ontario to Athens flight tickets

Delta

Jan 6

ONT7:00 amOntario

23h 30m

2 stops

ATH4:30 pmAthens Eleftherios V.

Mar 9

ATH6:10 amAthens Eleftherios V.

20h 02m

2 stops

ONT4:12 pmOntario

$842

Delta

Jan 17

ONT7:00 amOntario

20h 40m

2 stops

ATH1:40 pmAthens Eleftherios V.

Jan 25

ATH2:40 pmAthens Eleftherios V.

35h 32m

2 stops

ONT4:12 pmOntario

$858

Delta

Jan 17

ONT7:00 amOntario

20h 40m

2 stops

ATH1:40 pmAthens Eleftherios V.

Jan 24

ATH5:55 amAthens Eleftherios V.

26h 19m

2 stops

ONT10:14 pmOntario

$888

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 3/28

7:00 am-11:00 am

1 stop18h 00m

Athens Eleftherios V.

Tue 4/6

9:45 am-10:14 pm

1 stop22h 29m

$818

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 1/27

2:21 pm-1:00 am

2 stops24h 39m

Athens Eleftherios V.

Wed 2/3

7:55 am-11:13 pm

2 stops25h 18m

$826

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 2/1

4:19 pm-11:20 pm

2 stops21h 01m

Athens Eleftherios V.

Mon 2/15

8:20 pm-10:08 pm

2 stops35h 48m

$832

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 2/1

1:24 pm-11:20 pm

2 stops23h 56m

Athens Eleftherios V.

Wed 2/10

7:55 am-11:13 pm

2 stops25h 18m

$832

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 1/27

7:00 am-1:40 pm

2 stops20h 40m

Athens Eleftherios V.

Tue 2/2

5:25 pm-4:12 pm

2 stops32h 47m

$838

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 1/17

7:00 am-1:40 pm

2 stops20h 40m

Athens Eleftherios V.

Tue 1/26

5:25 pm-10:43 pm

2 stops39h 18m

$838

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Wed 1/27

7:00 am-1:40 pm

2 stops20h 40m

Athens Eleftherios V.

Thu 2/4

6:10 am-10:14 pm

2 stops26h 04m

$838

Quickest round-trip

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 2/17

6:10 am-4:12 pm

2 stops20h 02m

$842

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

$842

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 2/2

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Tue 2/16

6:10 am-4:12 pm

2 stops20h 02m

$842

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 $535. 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 32% 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	$371
Fastest flight time	16h 15m
Direct flights	None

The best one-way flight to Athens from Ontario in the past 72 hours is $371. The best round-trip flight deal from Ontario to Athens found on momondo in the last 72 hours is $818.

The fastest flight from Ontario to Athens takes 16h 15m

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 15m.
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

Loutraki

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.