$219 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 3/4. 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$440
Belgrade
Belgrade2 stops$534
Split
Split2 stops$934
Dubrovnik
Dubrovnik2 stops$582
Thera
Thera2 stops$583
Cluj Napoca
Cluj Napoca2 stops$498
Athens
Athens2 stops$440
Belgrade
Belgrade2 stops$534
Split
Split2 stops$934
Dubrovnik
Dubrovnik2 stops$582
Thera
Thera2 stops$583
Cluj Napoca
Cluj Napoca2 stops$498

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, Mar 17 - Tue, Mar 31
British Airways Logo
3:19 pm - 1:20 am
ONT
-
ATH
25h 01m
2 stops
British Airways Logo
7:55 am - 10:49 pm
ATH
-
ONT
24h 54m
2 stops
$440British Airways
Tue, Jan 27 - Thu, Feb 5
British Airways Logo
4:45 pm - 1:20 am
ONT
-
ATH
22h 35m
2 stops
British Airways Logo
7:30 am - 10:13 pm
ATH
-
ONT
24h 43m
2 stops
$457British Airways
Tue, Mar 24 - Tue, Mar 31
British Airways Logo
7:00 am - 1:20 pm
ONT
-
ATH
45h 20m
2 stops
British Airways Logo
6:30 pm - 11:59 pm
ATH
-
ONT
39h 29m
2 stops
$469British Airways
Sun, Apr 5 - Fri, May 1
Lufthansa Logo
6:00 am - 12:30 am
ONT
-
CLJ
32h 30m
2 stops
Lufthansa Logo
6:00 am - 8:36 pm
CLJ
-
ONT
24h 36m
2 stops
$498Lufthansa
Mon, Mar 2 - Tue, Mar 17
Delta Logo
6:00 am - 1:35 pm
ONT
-
ATH
21h 35m
2 stops
Delta Logo
12:20 pm - 11:40 am
ATH
-
ONT
32h 20m
1 stop
$499Delta
Mon, Feb 2 - Thu, Feb 12
United Airlines Logo
5:05 am - 1:40 pm
ONT
-
CLJ
22h 35m
2 stops
United Airlines Logo
6:00 am - 10:57 pm
CLJ
-
ONT
26h 57m
2 stops
$503United Airlines
Sat, Feb 14 - Thu, Feb 26
United Airlines Logo
1:45 pm - 12:25 am
ONT
-
ATH
48h 40m
2 stops
United Airlines Logo
2:10 pm - 10:57 pm
ATH
-
ONT
18h 47m
2 stops
$514United Airlines
Sun, Mar 1 - Sun, Mar 8
Multiple Airlines Logo
6:00 am - 3:50 pm
ONT
-
OTP
23h 50m
2 stops
Multiple Airlines Logo
4:50 pm - 4:28 pm
OTP
-
ONT
32h 38m
2 stops
$526Multiple Airlines
Wed, Feb 18 - Thu, Feb 26
Delta Logo
6:00 am - 11:25 pm
ONT
-
BEG
32h 25m
2 stops
Delta Logo
6:05 am - 10:37 pm
BEG
-
ONT
25h 32m
2 stops
$534Delta
Tue, Apr 7 - Mon, May 11
Multiple Airlines Logo
10:59 am - 3:25 pm
ONT
-
OTP
18h 26m
2 stops
Multiple Airlines Logo
8:15 am - 10:35 pm
OTP
-
ONT
24h 20m
2 stops
$560Multiple Airlines
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 $338, prices are generally cheapest when you fly direct.

Good to know

Low seasonFebruary
Cheapest flight$219
Best time to beat the crowds with an average 38% drop in price.
Most popular time to fly with an average 66% increase in price.
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 9171 reviews
7.3Comfort
7.1Entertainment
6.6Food
7.7Boarding
8.1Crew
Airline reviews

left on time, reasonable boarding process arrived early luggage came out quickly

10.0 ExcellentMitchell, Jan 2026
SFO - RDU
Read more United Airlines reviews

left on time, reasonable boarding process arrived early luggage came out quickly

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

It was great with United overall except for two things. 1) It was a 5-hour flight and we were with kids, so we were asking for extra snacks. They were extremely reticent to dole them out even though there wasn't any meal and the kids were starting to hit their limit towards the end. 2) Baggage didn't arrive until 80 minutes after we landed.

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

I boarded flight UA#1318 at Sacramento International Airport going back to Houston TX. The flight was scheduled at 5:10am. I was able to check in virtually using the United Airlines app. When I entered the airport, there was no one outside assisting with checked bags as it was for Delta Airlines. Immediately upon entering, there was a LONG, EXTREMELY LONG line to the kiosks to get boarding passes. I stand in line to get boarding passes then had to move to ANOTHER EXTREMELY LONG line to get my bags checked in. While standing in this line, we noticed an agent taking customers to 3 at a time to her station to check their bags in. Lucky for me, she called me back, checked my bags for me and I was on my way. I then encountered another long line at the TSA check and to avoid I ending up having to sign up for CLEAR to bypass it. So glad, I did.,...Both of my flights were great with no issues, butthe check in progress at Bush Airport was so much smoother. Check-in at SMF airport needs to be anaylzed and corrected. Do better United, I know you can....thanks

Pushed back only to get deplaned due to a tire damaged by ground crew. They did at least go pretty fast. The bathrooms should be banned under the Geneva convention. No room to even sit straight on the toilet. The under-seat entertainment units block what little leg room there is.

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

from SFO-> FRA flight, AVML meal was significantly less compared to regular meal, especially no Desert, no Bread, no sides.

This was an older airplane. The cabin was constantly warm to hot throughout the 10 hour flight and there were no vents to personalize air flow. Also since it was an older plane, the material and comfort of the chairs were very uncomfortable. I left my flight with major soreness on my tailbone.

Older aircraft, no meal, only food was for purchase. Not impressed United.

Everything you need to know for your flight to Southeast Europe

Information on your arrival and departure airports