$648 Find Cheap Flights from Southeast Europe to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 7/15. 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

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Cheap Flights from Southeast Europe to Ontario

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Southeast Europe to Ontario 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 Southeast Europe to Ontario

Tue, Aug 12 - Thu, Sep 4
KLM Logo
9:10 am - 10:20 pmATH-ONT
23h 10m1 stop
KLM Logo
7:05 am - 10:55 amONT-ATH
17h 50m1 stop
$829KLM
Find Deal
Sun, Dec 14 - Sat, Dec 27
British Airways Logo
7:55 pm - 9:37 pmATH-ONT
35h 42m2 stops
British Airways Logo
5:03 pm - 1:20 pmONT-ATH
34h 17m2 stops
$853British Airways
Find Deal
Thu, Jul 24 - Thu, Aug 7
United Airlines Logo
12:10 pm - 10:06 pmATH-ONT
19h 56m2 stops
United Airlines Logo
5:05 am - 10:05 amONT-ATH
19h 00m2 stops
$898United Airlines
Find Deal
Wed, Nov 5 - Wed, Nov 12
United Airlines Logo
6:15 am - 5:34 pmATH-ONT
21h 19m2 stops
United Airlines Logo
6:09 am - 10:10 amONT-ATH
18h 01m2 stops
$900United Airlines
Find Deal
Fri, Aug 15 - Tue, Aug 26
American Airlines Logo
12:00 pm - 9:12 pmATH-ONT
19h 12m1 stop
American Airlines Logo
11:29 pm - 12:05 pmONT-ATH
26h 36m1 stop
$939American Airlines
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Fri, Aug 15 - Wed, Aug 27
American Airlines Logo
5:25 am - 5:52 pmATH-ONT
22h 27m2 stops
American Airlines Logo
10:29 pm - 12:05 pmONT-ATH
27h 36m1 stop
$950American Airlines
Find Deal
Wed, Sep 10 - Sun, Sep 21
Air Serbia Logo
7:45 am - 9:29 pmBEG-ONT
22h 44m1 stop
Air Serbia Logo
10:56 pm - 4:45 amONT-BEG
20h 49m1 stop
$1,022Air Serbia
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Thu, Aug 14 - Thu, Sep 4
Delta Logo
9:10 am - 7:11 pmATH-ONT
20h 01m1 stop
Delta Logo
7:05 am - 10:55 amONT-ATH
17h 50m1 stop
$1,026Delta
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Tue, Sep 16 - Sun, Sep 21
Air Serbia Logo
7:45 am - 9:29 pmBEG-ONT
22h 44m1 stop
Air Serbia Logo
10:56 pm - 4:45 amONT-BEG
20h 49m1 stop
$1,059Air Serbia
Find Deal
Tue, Aug 12 - Tue, Aug 26
Delta Logo
9:10 am - 7:11 pmATH-ONT
20h 01m1 stop
Delta Logo
7:05 am - 10:55 amONT-ATH
17h 50m1 stop
$1,069Delta
Find Deal
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Good to know

Cheapest flight$648
Flight from Belgrade to Ontario

FAQs for booking flights from Southeast Europe to Ontario

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

    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 Southeast Europe to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from 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 Southeast Europe to Ontario?

    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 to Ontario with an airline and back to Southeast Europe with another airline.

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

    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 to Ontario from 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 Southeast Europe to Ontario

 
Need help choosing which airline to fly with from Southeast Europe to Ontario? 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 8810 reviews
7.0Entertainment
7.3Comfort
6.6Food
7.7Boarding
8.1Crew
Airline reviews

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

8.0 ExcellentLawrence, Jun 2025HNL - SFO
Read more United Airlines reviews

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

United out of SFO is having issues with catering so none of our meals were loaded on the plane and no offer of compensation for our tickets purchased was offered.

Its good expeince but in enternteiment please be like you tube the music i like or movie

I needed to make changes to my flights. When I called customer service, they assisted me with care professionalism.

A bit rush for transit. Food and entertainment are not available

Wonderful and fast TSA checkpoint. The line was fast and our gate was close by

The gate was too far away for the connecting flight

Generally good. The aisles have gotten narrower which can slow down boarding. Flight crew was great! Healthier complimentary snacks would be appreciated. Due to earthquake in San Francisco we had to circle in air space for a bit but then had a smooth landing. I laud the flight crew for their patience ;)

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

Ontario (ONT)

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