$236 Find Cheap Flights from Ontario to Southeast Europe

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Southeast Europe departing on 8/26. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Southeast Europe

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Southeast Europe, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Southeast Europe, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Ontario to Southeast Europe

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Athens
Athens2 stops$648
Belgrade
Belgrade2 stops$782
Split
Split2 stops$757
Dubrovnik
Dubrovnik2 stops$643
Thera
Thera2 stops$873
Cluj Napoca
Cluj Napoca2 stops$568
Athens
Athens2 stops$648
Belgrade
Belgrade2 stops$782
Split
Split2 stops$757
Dubrovnik
Dubrovnik2 stops$643
Thera
Thera2 stops$873
Cluj Napoca
Cluj Napoca2 stops$568

Book Cheap Ontario to Southeast Europe Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Southeast Europe that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Southeast Europe

Tue, Aug 4 - Tue, Aug 18
United Airlines Logo
1:18 pm - 4:20 pm
ONT
-
OTP
17h 02m
2 stops
United Airlines Logo
6:05 am - 6:11 pm
OTP
-
ONT
22h 06m
2 stops
$567United Airlines
Sun, Apr 5 - Wed, Apr 15
United Airlines Logo
5:10 am - 5:25 pm
ONT
-
CLJ
26h 15m
2 stops
United Airlines Logo
1:50 pm - 10:31 pm
CLJ
-
ONT
18h 41m
2 stops
$568United Airlines
Tue, Apr 28 - Tue, May 12
Multiple Airlines Logo
10:59 am - 3:25 pm
ONT
-
OTP
18h 26m
2 stops
Multiple Airlines Logo
8:15 am - 8:54 pm
OTP
-
ONT
22h 39m
2 stops
$574Multiple Airlines
Fri, Apr 24 - Sun, May 10
Multiple Airlines Logo
2:08 pm - 7:05 pm
ONT
-
OTP
18h 57m
2 stops
Multiple Airlines Logo
8:10 am - 10:36 pm
OTP
-
ONT
24h 26m
2 stops
$625Multiple Airlines
Wed, Sep 2 - Wed, Sep 16
British Airways Logo
4:54 pm - 12:45 pm
ONT
-
ZAG
34h 51m
2 stops
British Airways Logo
1:00 pm - 9:37 pm
ZAG
-
ONT
41h 37m
2 stops
$633British Airways
Wed, Aug 5 - Wed, Aug 19
British Airways Logo
4:54 pm - 3:30 pm
ONT
-
DBV
37h 36m
2 stops
British Airways Logo
9:00 pm - 10:14 pm
DBV
-
ONT
34h 14m
2 stops
$643British Airways
Tue, Mar 31 - Tue, Apr 7
Delta Logo
6:00 am - 11:00 pm
ONT
-
ATH
31h 00m
2 stops
Delta Logo
6:00 am - 10:34 pm
ATH
-
ONT
26h 34m
2 stops
$648Delta
Sun, Apr 19 - Wed, Apr 29
KLM Logo
5:05 pm - 1:15 am
ONT
-
ATH
22h 10m
2 stops
KLM Logo
6:00 am - 5:15 pm
ATH
-
ONT
21h 15m
2 stops
$652KLM
Sun, Apr 19 - Wed, Apr 29
Delta Logo
5:05 pm - 1:15 am
ONT
-
ATH
22h 10m
2 stops
Delta Logo
6:00 am - 11:44 pm
ATH
-
ONT
27h 44m
2 stops
$653Delta
Sun, Apr 19 - Wed, Apr 29
KLM Logo
5:05 pm - 1:15 am
ONT
-
ATH
22h 10m
2 stops
KLM Logo
9:45 am - 6:33 pm
ATH
-
ONT
18h 48m
1 stop
$671KLM
Booking Insights

KAYAK's insights & trends for Ontario to Southeast Europe flights

Get data-powered insights and trends into flights from Ontario to Southeast Europe to help you find the cheapest flights, the best time to fly and much more.

Can I save money by flying with a layover from Ontario to Southeast Europe?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $361, prices are generally cheapest when you fly direct.

Find deals

Good to know

Low seasonFebruary
Cheapest flight$236
Best time to beat the crowds with an average 42% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Ontario to Bucharest

FAQs - booking Southeast Europe flights

  • How does KAYAK find such low prices on flights from Ontario to Southeast Europe?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Southeast Europe.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Southeast Europe?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario to Southeast Europe is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Southeast Europe?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Ontario to Southeast Europe with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Southeast Europe?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Ontario to Southeast Europe up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to Southeast Europe

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Southeast Europe. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Southeast Europe? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9404 reviews
7.1Entertainment
7.7Boarding
8.1Crew
7.3Comfort
6.6Food
Airline reviews

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

6.0 GoodAnonymous, Mar 2026
SFO - DEN
Read more United Airlines reviews

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

We had turbulence ever 1/2 hr or so and the captains announcements were SOOOO LOUD

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

it was a very short flight so my expectations were low.

Entertainment kept turning itself off. Gave up on watching a movie.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Everything you need to know for your flight to Southeast Europe

Information on your arrival and departure airports

Ontario (ONT)