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.

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.

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.

$389 Cheap Flights from Ontario to Athens in 2026

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.

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

17h 55m1 stop Atlanta Hartsfield-Jackson

6:10 am - 5:19 pmATH Athens Eleftherios V.-ONT Ontario

21h 09m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$746Delta

Mon, Oct 5 - Sat, Nov 14

7:07 am - 1:40 pmONT Ontario-ATH Athens Eleftherios V.

20h 33m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

6:10 am - 5:19 pmATH Athens Eleftherios V.-ONT Ontario

21h 09m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$821Delta

Sat, Nov 7 - Sat, Nov 14

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

17h 55m1 stop Atlanta Hartsfield-Jackson

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

26h 43m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$829KLM

Mon, Oct 5 - Tue, Oct 20

12:16 pm - 4:30 pmONT Ontario-ATH Athens Eleftherios V.

18h 14m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

6:10 am - 5:19 pmATH Athens Eleftherios V.-ONT Ontario

21h 09m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$832Delta

Fri, Nov 6 - Sat, Nov 14

10:25 am - 4:40 pmONT Ontario-ATH Athens Eleftherios V.

20h 15m2 stops Dallas/Fort Worth London Heathrow

1:20 pm - 11:52 pmATH Athens Eleftherios V.-ONT Ontario

20h 32m2 stops Charlotte Douglas Dallas/Fort Worth

$833American Airlines

Mon, Oct 5 - Tue, Oct 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

$836United Airlines

Mon, Oct 5 - Tue, Oct 20

4:25 pm - 11:20 pmONT Ontario-ATH Athens Eleftherios V.

20h 55m2 stops Phoenix Sky Harbor Intl London Heathrow

3:50 pm - 11:54 amATH Athens Eleftherios V.-ONT Ontario

30h 04m2 stops Madrid Barajas Dallas/Fort Worth

$838Multiple Airlines

Mon, Jan 18 - Mon, Feb 1

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

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

5:30 pm - 4:12 pmATH Athens Eleftherios V.-ONT Ontario

32h 42m2 stops Amsterdam Schiphol Salt Lake City

$839Multiple Airlines

Tue, Jan 19 - Mon, Feb 1

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

$839Multiple Airlines

Tue, Jan 19 - Tue, Feb 2

7:00 am - 12:40 pmONT Ontario-ATH Athens Eleftherios V.

19h 40m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

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

22h 29m1 stop Atlanta Hartsfield-Jackson

$840Multiple Airlines

Tue, Mar 2 - Tue, Mar 30

Cheap last minute flights

Enter your travel dates to find the best prices.

7:13 pm - 10:35 amONT Ontario-ATH Athens Eleftherios V.

29h 22m2 stops San Francisco Chicago O'Hare Intl

11:45 am - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

21h 14m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl

$1,038United Airlines

Sun, Sep 13 - Mon, Sep 21

1:18 pm - 8:10 amONT Ontario-ATH Athens Eleftherios V.

32h 52m2 stops Denver Intl Newark

11:45 am - 12:50 pmATH Athens Eleftherios V.-ONT Ontario

35h 05m2 stops Washington, D.C. Dulles Intl Denver Intl

$1,038United Airlines

Sat, Sep 12 - Mon, Sep 21

1:18 pm - 10:00 amONT Ontario-ATH Athens Eleftherios V.

34h 42m2 stops Denver Intl Washington, D.C. Dulles Intl

10:25 am - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

22h 34m2 stops Newark Chicago O'Hare Intl

$1,038United Airlines

Sat, Sep 12 - Mon, Sep 21

1:18 pm - 8:10 amONT Ontario-ATH Athens Eleftherios V.

32h 52m2 stops Denver Intl Newark

11:45 am - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

21h 14m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl

$1,051United Airlines

Sat, Sep 12 - Mon, Sep 21

1:56 pm - 10:35 amONT Ontario-ATH Athens Eleftherios V.

34h 39m2 stops San Francisco Chicago O'Hare Intl

10:25 am - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

22h 34m2 stops Newark Chicago O'Hare Intl

$1,098United Airlines

Fri, Sep 11 - Sat, Sep 19

5:00 am - 10:35 amONT Ontario-ATH Athens Eleftherios V.

19h 35m2 stops Denver Intl Chicago O'Hare Intl

10:25 am - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

22h 34m2 stops Newark Chicago O'Hare Intl

$1,098United Airlines

Sat, Sep 12 - Sat, Sep 19

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

17h 35m1 stop Chicago O'Hare Intl

11:45 am - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

21h 14m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl

$1,098United Airlines

Sat, Sep 12 - Mon, Sep 21

1:56 pm - 10:35 amONT Ontario-ATH Athens Eleftherios V.

34h 39m2 stops San Francisco Chicago O'Hare Intl

11:45 am - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

21h 14m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl

$1,098United Airlines

Fri, Sep 11 - Mon, Sep 21

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

17h 35m1 stop Chicago O'Hare Intl

10:25 am - 10:59 pmATH Athens Eleftherios V.-ONT Ontario

22h 34m2 stops Newark Chicago O'Hare Intl

$1,098United Airlines

Sat, Sep 12 - Sat, Sep 19

10:00 pm - 10:00 amONT Ontario-ATH Athens Eleftherios V.

26h 00m1 stop Atlanta Hartsfield-Jackson

6:00 am - 5:19 pmATH Athens Eleftherios V.-ONT Ontario

21h 19m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,167Delta

Sun, Sep 13 - Mon, Sep 21

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British Airways flights from Ontario to Athens

Our best British Airways deals on Ontario to Athens flight tickets

British Airways

Jan 17

ONT12:44 pmOntario

41h 11m

2 stops

ATH3:55 pmAthens Eleftherios V.

Feb 2

ATH4:55 pmAthens Eleftherios V.

39h 04m

2 stops

ONT9:59 pmOntario

$842

British Airways

Nov 19

ONT1:30 pmOntario

26h 00m

2 stops

ATH1:30 amAthens Eleftherios V.

Dec 6

ATH7:55 amAthens Eleftherios V.

23h 58m

2 stops

ONT9:53 pmOntario

$894

United Airlines flights from Ontario to Athens

Our best United Airlines deals on Ontario to Athens flight tickets

United Airlines

Oct 5

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

$836

United Airlines

Jan 20

ONT4:03 pmOntario

23h 27m

2 stops

ATH1:30 amAthens Eleftherios V.

Jan 29

ATH6:45 amAthens Eleftherios V.

23h 35m

3 stops

ONT8:20 pmOntario

$841

United Airlines

Jan 20

ONT11:20 amOntario

28h 10m

2 stops

ATH1:30 amAthens Eleftherios V.

Feb 3

ATH7:05 amAthens Eleftherios V.

23h 15m

3 stops

ONT8:20 pmOntario

$843

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 10/5

7:05 am-11:00 am

1 stop17h 55m

Athens Eleftherios V.

Sat 11/14

6:10 am-5:19 pm

2 stops21h 09m

$746

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Sat 11/7

7:07 am-1:40 pm

2 stops20h 33m

Athens Eleftherios V.

Sat 11/14

6:10 am-5:19 pm

2 stops21h 09m

$821

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 10/5

7:05 am-11:00 am

1 stop17h 55m

Athens Eleftherios V.

Tue 10/20

6:00 am-10:43 pm

2 stops26h 43m

$829

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Fri 11/6

12:16 pm-4:30 pm

2 stops18h 14m

Athens Eleftherios V.

Sat 11/14

6:10 am-5:19 pm

2 stops21h 09m

$832

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 10/5

10:25 am-4:40 pm

2 stops20h 15m

Athens Eleftherios V.

Tue 10/20

1:20 pm-11:52 pm

2 stops20h 32m

$833

Quickest round-trip

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 10/5

7:00 am-10:35 am

1 stop17h 35m

Athens Eleftherios V.

Tue 10/20

12:35 pm-10:49 pm

1 stop20h 14m

$836

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Mon 1/18

4:25 pm-11:20 pm

2 stops20h 55m

Athens Eleftherios V.

Mon 2/1

3:50 pm-11:54 am

2 stops30h 04m

$838

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 1/19

7:00 am-1:40 pm

2 stops20h 40m

Athens Eleftherios V.

Mon 2/1

5:30 pm-4:12 pm

2 stops32h 42m

$839

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 1/19

7:00 am-1:40 pm

2 stops20h 40m

Athens Eleftherios V.

Tue 2/2

5:25 pm-10:43 pm

2 stops39h 18m

$839

OntarioAthens

ONT Ontario - ATH Athens Eleftherios V.

ONTATH

Ontario

Tue 3/2

7:00 am-12:40 pm

2 stops19h 40m

Athens Eleftherios V.

Tue 3/30

9:45 am-10:14 pm

1 stop22h 29m

$840

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 day to depart on your flight to Athens?

The cheapest day to depart on your flight to Athens is on a Wednesday when prices can be found for as low as $531. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $743. These prices are subject to change though, so be sure to set up a Price Alert for flights to Athens.

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 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	$389
Fastest flight time	16h 15m
Direct flights	None

The best one-way flight to Athens from Ontario in the past 72 hours is $389. The best round-trip flight deal from Ontario to Athens found on momondo in the last 72 hours is $746.

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.

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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.