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Cheap flights from Ontario to Southeast Europe from $304

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Southeast Europe departing on 10/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to Southeast Europe

Cheap round-trip flights

United Airlines Logo
6:00 am - 11:35 amONT-ATH
20h 35m2 stops
United Airlines Logo
6:35 am - 5:34 pmATH-ONT
20h 59m2 stops
$509United Airlines
Find Deal
mié., oct. 29 - mié., nov. 12
British Airways Logo
5:03 pm - 10:55 pmONT-OTP
19h 52m2 stops
British Airways Logo
8:00 am - 10:02 pmOTP-ONT
24h 02m2 stops
$512British Airways
Find Deal
mar., ene. 27 - mar., feb. 10
Delta Logo
7:05 am - 10:55 amONT-ATH
17h 50m1 stop
Delta Logo
9:10 am - 7:11 pmATH-ONT
20h 01m1 stop
$565Delta
Find Deal
sáb., ago. 16 - vie., ago. 29
Logo
10:57 am - 3:45 pmONT-OTP
19h 48m2 stops
Logo
8:00 am - 10:23 pmOTP-ONT
24h 23m2 stops
$568
Find Deal
jue., oct. 30 - jue., nov. 13
Delta Logo
10:00 pm - 10:00 amONT-ATH
26h 00m1 stop
Delta Logo
6:30 am - 11:39 pmATH-ONT
27h 09m2 stops
$587Delta
Find Deal
vie., sep. 19 - vie., oct. 10
Air Canada Logo
6:50 pm - 11:10 amONT-ATH
30h 20m2 stops
Air Canada Logo
12:10 pm - 12:13 pmATH-ONT
34h 03m2 stops
$595Air Canada
Find Deal
sáb., ago. 23 - vie., sep. 5
Air Canada Logo
6:50 pm - 11:10 amONT-ATH
30h 20m2 stops
Air Canada Logo
12:10 pm - 12:13 pmATH-ONT
34h 03m2 stops
$632Air Canada
Find Deal
sáb., sep. 6 - vie., sep. 19
Logo
10:57 am - 3:45 pmONT-OTP
19h 48m2 stops
Logo
8:05 am - 10:29 pmOTP-ONT
24h 24m2 stops
$637
Find Deal
mié., oct. 29 - lun., nov. 3
KLM Logo
7:05 am - 10:10 amONT-ATH
17h 05m1 stop
KLM Logo
9:10 am - 7:11 pmATH-ONT
20h 01m1 stop
$669KLM
Find Deal
sáb., ago. 16 - vie., ago. 29
KLM Logo
7:00 am - 12:35 pmONT-DBV
20h 35m2 stops
KLM Logo
1:25 pm - 11:39 pmDBV-ONT
19h 14m2 stops
$947KLM
Find Deal
mié., oct. 15 - mié., oct. 22

Delta flights from Ontario to Southeast Europe

Our best Delta deals on Ontario to Southeast Europe flight tickets
Delta
Aug 16
ONT7:05 amOntario
17h 50m
1 stop
ATH10:55 amAthens Eleftherios V.
Aug 29
ATH9:10 amAthens Eleftherios V.
20h 01m
1 stop
ONT7:11 pmOntario
$565
Find similar
Delta
Sep 19
ONT10:00 pmOntario
26h 00m
1 stop
ATH10:00 amAthens Eleftherios V.
Oct 10
ATH6:30 amAthens Eleftherios V.
27h 09m
2 stops
ONT11:39 pmOntario
$587
Find similar
Delta
Sep 13
ONT11:55 amOntario
25h 20m
2 stops
ATH11:15 pmAthens Eleftherios V.
Sep 22
ATH3:25 amAthens Eleftherios V.
22h 32m
2 stops
ONT3:57 pmOntario
$611
Find similar

British Airways flights from Ontario to Southeast Europe

Our best British Airways deals on Ontario to Southeast Europe flight tickets
British Airways
Jan 27
ONT5:03 pmOntario
19h 52m
2 stops
OTP10:55 pmBucharest Otopeni Intl
Feb 10
OTP8:00 amBucharest Otopeni Intl
24h 02m
2 stops
ONT10:02 pmOntario
$512
Find similar
British Airways
Oct 28
ONT11:59 pmOntario
30h 46m
2 stops
OTP3:45 pmBucharest Otopeni Intl
Nov 11
OTP8:00 amBucharest Otopeni Intl
21h 41m
2 stops
ONT7:41 pmOntario
$513
Find similar
British Airways
Aug 26
ONT12:47 pmOntario
26h 38m
2 stops
OTP1:25 amBucharest Otopeni Intl
Oct 30
OTP8:00 amBucharest Otopeni Intl
22h 49m
2 stops
ONT9:49 pmOntario
$543
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Southeast Europe that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated julio 31, 2025.
Use the filters below to find and compare flights from Ontario to Southeast Europe that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioAthens

ONT - ATH

ONTATH

Ontario

mié. 10/29

6:00 am-11:35 am

2 stops20h 35m

Athens Eleftherios V.

mié. 11/12

6:35 am-5:34 pm

2 stops20h 59m

$509

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

mar. 1/27

5:03 pm-10:55 pm

2 stops19h 52m

Bucharest Otopeni Intl

mar. 2/10

8:00 am-10:02 pm

2 stops24h 02m

$512

OntarioAthens

ONT - ATH

ONTATH

Ontario

sáb. 8/16

7:05 am-10:55 am

1 stop17h 50m

Athens Eleftherios V.

vie. 8/29

9:10 am-7:11 pm

1 stop20h 01m

$565

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

jue. 10/30

10:57 am-3:45 pm

2 stops19h 48m

Bucharest Otopeni Intl

jue. 11/13

8:00 am-10:23 pm

2 stops24h 23m

$568

OntarioAthens

ONT - ATH

ONTATH

Ontario

vie. 9/19

10:00 pm-10:00 am

1 stop26h 00m

Athens Eleftherios V.

vie. 10/10

6:30 am-11:39 pm

2 stops27h 09m

$587

OntarioAthens

ONT - ATH

ONTATH

Ontario

sáb. 8/23

6:50 pm-11:10 am

2 stops30h 20m

Athens Eleftherios V.

vie. 9/5

12:10 pm-12:13 pm

2 stops34h 03m

$595

OntarioAthens

ONT - ATH

ONTATH

Ontario

sáb. 9/6

6:50 pm-11:10 am

2 stops30h 20m

Athens Eleftherios V.

vie. 9/19

12:10 pm-12:13 pm

2 stops34h 03m

$632

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

mié. 10/29

10:57 am-3:45 pm

2 stops19h 48m

Bucharest Otopeni Intl

lun. 11/3

8:05 am-10:29 pm

2 stops24h 24m

$637

OntarioAthens

ONT - ATH

ONTATH

Ontario

sáb. 8/16

7:05 am-10:10 am

1 stop17h 05m

Athens Eleftherios V.

vie. 8/29

9:10 am-7:11 pm

1 stop20h 01m

$669

OntarioDubrovnik

ONT - DBV

ONTDBV

Ontario

mié. 10/15

7:00 am-12:35 pm

2 stops20h 35m

Dubrovnik

mié. 10/22

1:25 pm-11:39 pm

2 stops19h 14m

$947

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Southeast Europe from

How to get the cheapest flight ticket from Ontario to Southeast Europe

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

What is the cheapest month to fly to Southeast Europe?

The month of February is, on average, the cheapest month to fly to Southeast Europe from Ontario, with most prices found around $601. If you aren’t able to travel during the month of February, then book flights to Southeast Europe from Ontario during March instead. Flights to Southeast Europe in March, while not as cheap as those in February, still average around $670.

What is the cheapest day to depart on your flight to Southeast Europe?

On average, the least expensive day to fly to Southeast Europe from Ontario is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $740. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Southeast Europe for around $1,240.

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

Our most recent data shows that the best time of day to fly to Southeast Europe is in the afternoon. Flights from Ontario to Southeast Europe during this time can be as low as $815. In contrast, the most expensive time of day to depart to Southeast Europe is at noon when prices are around $1,089.

Can stopping save me money on Ontario to Southeast Europe flights?

No. A direct flight is the cheapest option for a flight between Ontario to Southeast Europe.

Cheap Ontario to Southeast Europe flight deals and tips

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

Best Price Found

$304

Fastest flight time

15h 26m

Direct flights

None

Airports in Southeast Europe

7 airports
The best one-way flight to Southeast Europe from Ontario in the past 72 hours is $304. The best round-trip flight deal from Ontario to Southeast Europe found on momondo in the last 72 hours is $509.
The fastest flight from Ontario to Southeast Europe takes 15h 26m
There are no direct flights from Ontario to Southeast Europe. Popular non-direct routes for this connection are Ontario Airport - Athens Eleftherios V. Airport, Ontario Airport - Cluj Napoca Airport and Ontario Airport - Bucharest Otopeni Intl Airport.
There are 7 airports near Southeast Europe: Cluj Napoca (CLJ), Zagreb Franjo Tuđman (ZAG), Athens Eleftherios V. (ATH), Belgrade Nikola Tesla (BEG), Dubrovnik (DBV), Split (SPU), Bucharest Otopeni Intl (OTP)
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  • When did momondo last update prices for flights from Ontario Airport to Southeast Europe?

    Prices for flights from Ontario Airport to Southeast Europe were last updated today.

  • How many operators does momondo search for flights from Ontario Airport to Southeast Europe?

  • How old do you have to be to fly from Ontario Airport to Southeast Europe?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to Southeast Europe.

  • What documentation or ID do you need to fly to Southeast Europe?

    The required travel and health documents for your Southeast Europe 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 Southeast Europe. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Ontario to Southeast Europe?

Best airlines flying from Ontario to Southeast Europe

Compare and see reviews for airlines that fly from Ontario to Southeast Europe with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $550Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
DeltaPriceFrom $571Free CancellationRating
8.0
7,981 reviews
Search Delta flights

Why use momondo?

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

It is quick and easy to find Ontario to Southeast Europe 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 Southeast Europe that suits you.

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

All flight searches from Ontario to Southeast Europe on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Southeast Europe?

momondo helps you find the best flight between Ontario and Southeast Europe by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Price alerts on flights to Southeast Europe 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.

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