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

United Airlines is the most popular carrier 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.

$379 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.

12:49 pm - 7:15 pmONT Ontario-ATH Athens Eleftherios V.

20h 26m2 stops Dallas/Fort Worth London Heathrow

7:35 am - 10:25 pmATH Athens Eleftherios V.-ONT Ontario

24h 50m2 stops London Heathrow Dallas/Fort Worth

$826British Airways

Tue, Mar 2 - Fri, Mar 5

6:35 pm - 11:00 amONT Ontario-ATH Athens Eleftherios V.

30h 25m3 stops San Francisco Boston Logan Intl Montreal Pierre Elliott Trudeau Intl

6:45 am - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

26h 14m2 stops Frankfurt am Main San Francisco

$835United Airlines

Tue, Mar 2 - Fri, Mar 5

7:00 am - 3:10 pmONT Ontario-ATH Athens Eleftherios V.

22h 10m2 stops Dallas/Fort Worth Madrid Barajas

3:50 pm - 12:01 pmATH Athens Eleftherios V.-ONT Ontario

30h 11m2 stops Madrid Barajas Dallas/Fort Worth

$839Iberia

Sun, Feb 7 - Mon, Feb 15

6:35 pm - 11:00 amONT Ontario-ATH Athens Eleftherios V.

30h 25m3 stops San Francisco Boston Logan Intl Montreal Pierre Elliott Trudeau Intl

6:45 am - 8:32 pmATH Athens Eleftherios V.-ONT Ontario

23h 47m2 stops Frankfurt am Main Denver Intl

$840United Airlines

Tue, Mar 2 - Fri, Mar 5

12:00 pm - 4:35 pmONT Ontario-ATH Athens Eleftherios V.

18h 35m2 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

$841KLM

Sun, Feb 7 - Tue, Feb 16

6:30 am - 11:00 amONT Ontario-ATH Athens Eleftherios V.

42h 30m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

6:45 am - 8:32 pmATH Athens Eleftherios V.-ONT Ontario

23h 47m2 stops Frankfurt am Main Denver Intl

$847United Airlines

Tue, Mar 2 - Fri, Mar 5

5:00 am - 2:55 pmONT Ontario-ATH Athens Eleftherios V.

23h 55m2 stops Denver Intl Munich Franz Josef Strauss

6:55 am - 8:07 pmATH Athens Eleftherios V.-ONT Ontario

23h 12m2 stops Zurich San Francisco

$887United Airlines

Sun, Apr 11 - Sat, May 8

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

$891KLM

Sat, Feb 6 - Wed, Feb 17

10:59 am - 5:35 pmONT Ontario-ATH Athens Eleftherios V.

20h 36m2 stops Dallas/Fort Worth London Heathrow

7:55 am - 9:59 pmATH Athens Eleftherios V.-ONT Ontario

24h 04m2 stops London Heathrow Phoenix Sky Harbor Intl

$893British Airways

Mon, Apr 12 - Tue, Apr 20

11:20 am - 4:30 pmONT Ontario-ATH Athens Eleftherios V.

19h 10m2 stops San Francisco Frankfurt am Main

1:30 pm - 11:01 pmATH Athens Eleftherios V.-ONT Ontario

19h 31m2 stops Frankfurt am Main San Francisco

$900United Airlines

Mon, Feb 15 - Mon, Mar 1

Cheap last minute flights

Enter your travel dates to find the best prices.

6:00 am - 9:05 amONT Ontario-ATH Athens Eleftherios V.

18h 05m2 stops Houston George Bush Intcntl Newark

6:45 am - 6:01 pmATH Athens Eleftherios V.-ONT Ontario

21h 16m2 stops Frankfurt am Main San Francisco

$1,089United Airlines

Wed, Oct 28 - Wed, Nov 4

6:00 am - 9:35 amONT Ontario-ATH Athens Eleftherios V.

18h 35m2 stops Salt Lake City New York John F Kennedy Intl

6:10 am - 4:23 pmATH Athens Eleftherios V.-ONT Ontario

20h 13m2 stops Amsterdam Schiphol Salt Lake City

$5,447KLM

Tue, Oct 27 - Fri, Nov 6

6:00 am - 9:35 amONT Ontario-ATH Athens Eleftherios V.

18h 35m2 stops Salt Lake City New York John F Kennedy Intl

5:55 am - 5:16 pmATH Athens Eleftherios V.-ONT Ontario

21h 21m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$5,522KLM

Tue, Oct 27 - Sun, Nov 15

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

17h 35m1 stop Chicago O'Hare Intl

12:35 pm - 10:51 pmATH Athens Eleftherios V.-ONT Ontario

20h 16m1 stop Chicago O'Hare Intl

$6,517United Airlines

Fri, Oct 23 - Sat, Oct 24

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

17h 35m1 stop Chicago O'Hare Intl

2:25 pm - 10:51 pmATH Athens Eleftherios V.-ONT Ontario

18h 26m2 stops Frankfurt am Main San Francisco

$6,528United Airlines

Fri, Oct 23 - Sat, Oct 24

6:00 am - 9:35 amONT Ontario-ATH Athens Eleftherios V.

18h 35m2 stops Salt Lake City New York John F Kennedy Intl

6:10 am - 4:23 pmATH Athens Eleftherios V.-ONT Ontario

20h 13m2 stops Amsterdam Schiphol Salt Lake City

$17,110KLM

Wed, Oct 28 - Thu, Nov 5

6:00 am - 9:35 amONT Ontario-ATH Athens Eleftherios V.

18h 35m2 stops Salt Lake City New York John F Kennedy Intl

5:55 am - 4:24 pmATH Athens Eleftherios V.-ONT Ontario

20h 29m2 stops Amsterdam Schiphol Salt Lake City

$17,210KLM

Wed, Oct 28 - Sun, Nov 22

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

17h 53m1 stop Atlanta Hartsfield-Jackson

5:55 am - 4:23 pmATH Athens Eleftherios V.-ONT Ontario

20h 28m2 stops Amsterdam Schiphol Salt Lake City

$20,531Multiple Airlines

Fri, Oct 23 - Sun, Nov 8

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British Airways flights from Ontario to Athens

Our best British Airways deals on Ontario to Athens flight tickets

British Airways

Mar 2

ONT12:49 pmOntario

20h 26m

2 stops

ATH7:15 pmAthens Eleftherios V.

Mar 5

ATH7:35 amAthens Eleftherios V.

24h 50m

2 stops

ONT10:25 pmOntario

$826

British Airways

Apr 12

ONT10:59 amOntario

20h 36m

2 stops

ATH5:35 pmAthens Eleftherios V.

Apr 20

ATH7:55 amAthens Eleftherios V.

24h 04m

2 stops

ONT9:59 pmOntario

$893

British Airways

Feb 7

ONT7:00 amOntario

23h 05m

2 stops

ATH4:05 pmAthens Eleftherios V.

Feb 13

ATH7:55 amAthens Eleftherios V.

35h 47m

2 stops

ONT9:42 amOntario

$903

United Airlines flights from Ontario to Athens

Our best United Airlines deals on Ontario to Athens flight tickets

United Airlines

Mar 2

ONT6:35 pmOntario

30h 25m

3 stops

ATH11:00 amAthens Eleftherios V.

Mar 5

ATH6:45 amAthens Eleftherios V.

26h 14m

2 stops

ONT10:59 pmOntario

$835

United Airlines

Mar 2

ONT6:35 pmOntario

30h 25m

3 stops

ATH11:00 amAthens Eleftherios V.

Mar 5

ATH6:45 amAthens Eleftherios V.

23h 47m

2 stops

ONT8:32 pmOntario

$840

United Airlines

Mar 2

ONT6:30 amOntario

42h 30m

2 stops

ATH11:00 amAthens Eleftherios V.

Mar 5

ATH6:45 amAthens Eleftherios V.

23h 47m

2 stops

ONT8:32 pmOntario

$847

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 3/2

12:49 pm-7:15 pm

2 stops20h 26m

Athens Eleftherios V.

Fri 3/5

7:35 am-10:25 pm

2 stops24h 50m

$826

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 3/2

6:35 pm-11:00 am

3 stops30h 25m

Athens Eleftherios V.

Fri 3/5

6:45 am-10:59 pm

2 stops26h 14m

$835

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 2/7

7:00 am-3:10 pm

2 stops22h 10m

Athens Eleftherios V.

Mon 2/15

3:50 pm-12:01 pm

2 stops30h 11m

$839

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 3/2

6:35 pm-11:00 am

3 stops30h 25m

Athens Eleftherios V.

Fri 3/5

6:45 am-8:32 pm

2 stops23h 47m

$840

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 2/7

12:00 pm-4:35 pm

2 stops18h 35m

Athens Eleftherios V.

Tue 2/16

6:10 am-4:12 pm

2 stops20h 02m

$841

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 3/2

6:30 am-11:00 am

2 stops42h 30m

Athens Eleftherios V.

Fri 3/5

6:45 am-8:32 pm

2 stops23h 47m

$847

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sun 4/11

5:00 am-2:55 pm

2 stops23h 55m

Athens Eleftherios V.

Sat 5/8

6:55 am-8:07 pm

2 stops23h 12m

$887

Quickest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sat 2/6

12:00 pm-4:30 pm

2 stops18h 30m

Athens Eleftherios V.

Wed 2/17

6:10 am-4:12 pm

2 stops20h 02m

$891

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 4/12

10:59 am-5:35 pm

2 stops20h 36m

Athens Eleftherios V.

Tue 4/20

7:55 am-9:59 pm

2 stops24h 04m

$893

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 2/15

11:20 am-4:30 pm

2 stops19h 10m

Athens Eleftherios V.

Mon 3/1

1:30 pm-11:01 pm

2 stops19h 31m

$900

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	$379
Fastest flight time	17h 35m
Direct flights	None

The best one-way flight to Athens from Ontario in the past 72 hours is $379. The best round-trip flight deal from Ontario to Athens found on momondo in the last 72 hours is $826.

The fastest flight from Ontario to Athens takes 17h 35m

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 17h 35m.
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

Agia Marina

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.