ONT - BRU

$390 Find Cheap Flights from Ontario to Brussels - Compare and Save

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 Brussels departing on 9/30. 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

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Everything you should know

Cheapest round-trip
$750
Delta
Sun 11/1Wed 11/18
ONT - BRU • 1 stop
Cheapest one-way
$390
United Airlines
Wed 9/30
ONT - BRU • 3 stops
Top airlines
Cheapest • from $750 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Brussels. You'll need at least 1 connection.
Insights
Insights
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Insights
Top layover airports
Cheapest • Avg $829 (round-trip)
Shortest trip • 15h 35m (one-way)
Insights
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Booking Insights
Flight Deals

Cheap Flights from Ontario to Brussels (ONT-BRU)

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

Sun, Nov 1 - Wed, Nov 18
Delta Logo
12:18 pm - 10:55 am
ONT
-
BRU
13h 37m
1 stop
Delta Logo
12:55 pm - 10:14 pm
BRU
-
ONT
18h 19m
1 stop
$750Delta
Sat, Nov 28 - Fri, Dec 4
Delta Logo
10:59 pm - 10:55 am
ONT
-
BRU
26h 56m
1 stop
Delta Logo
12:55 pm - 10:14 pm
BRU
-
ONT
18h 19m
1 stop
$755Delta
Tue, Nov 3 - Tue, Nov 17
Multiple Airlines Logo
6:00 am - 7:50 am
ONT
-
BRU
16h 50m
2 stops
Multiple Airlines Logo
10:00 am - 6:29 pm
BRU
-
ONT
17h 29m
2 stops
$756Multiple Airlines
Sun, Nov 1 - Sun, Nov 15
Delta Logo
12:18 pm - 10:55 am
ONT
-
BRU
13h 37m
1 stop
Delta Logo
12:55 pm - 10:14 pm
BRU
-
ONT
18h 19m
1 stop
$800Delta
Fri, Nov 6 - Fri, Nov 20
Delta Logo
11:15 pm - 10:55 am
ONT
-
BRU
26h 40m
1 stop
Delta Logo
12:55 pm - 10:14 pm
BRU
-
ONT
18h 19m
1 stop
$806Delta
Sat, Nov 28 - Fri, Dec 4
Delta Logo
7:00 am - 10:55 am
ONT
-
BRU
18h 55m
1 stop
Delta Logo
8:05 am - 6:18 pm
BRU
-
ONT
19h 13m
2 stops
$807Delta
Wed, Oct 14 - Fri, Oct 23
United Airlines Logo
4:03 pm - 8:00 pm
ONT
-
BRU
18h 57m
2 stops
United Airlines Logo
9:10 am - 10:49 pm
BRU
-
ONT
46h 39m
2 stops
$832United Airlines
Sun, Nov 29 - Fri, Dec 4
Delta Logo
7:00 am - 10:55 am
ONT
-
BRU
18h 55m
1 stop
Delta Logo
12:55 pm - 10:14 pm
BRU
-
ONT
18h 19m
1 stop
$842Delta
Sun, Nov 29 - Thu, Dec 3
Delta Logo
7:00 am - 10:55 am
ONT
-
BRU
18h 55m
1 stop
Delta Logo
8:05 am - 6:18 pm
BRU
-
ONT
19h 13m
2 stops
$849Delta
Wed, Oct 14 - Thu, Oct 22
United Airlines Logo
8:03 am - 1:15 pm
ONT
-
BRU
20h 12m
2 stops
United Airlines Logo
10:15 am - 10:49 pm
BRU
-
ONT
21h 34m
1 stop
$852United Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Brussels flights

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

Which airlines provide the cheapest flights from Ontario to Brussels?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest round-trip tickets from Ontario to Brussels were found on Delta ($750) and United Airlines ($832).

Good to know

Cheapest flight$390
Flight from Ontario to Brussels

When to book flights from Ontario to Brussels

Are your dates flexible? Find out the best times to travel from Ontario to Brussels based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Ontario to Brussels flights

  • What is the cheapest flight from Ontario to Brussels Bruxelles-National Airport?

    In the last 5 days, the lowest price for a flight from Ontario to Brussels Bruxelles-National Airport was $338 for a one-way ticket and $750 for a round-trip.

  • Do I need a passport to fly between Ontario and Brussels?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Ontario and on arrival in Brussels.

  • Which airports will I be using when flying from Ontario to Brussels?

    Ontario airport is called Ontario and the only airport in Brussels is Brussels Bruxelles-National.

  • Which aircraft models fly most regularly from Ontario to Brussels?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Brussels?

    Star Alliance is the only airline alliance operating flights between Ontario and Brussels.

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

    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 Brussels.

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

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

    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 Brussels with an airline and back to Ontario with another airline. Booking your flights between Ontario and BRU can sometimes prove cheaper using this method.

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

    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 Brussels from Ontario 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 Brussels

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Brussels. 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 Brussels? 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 9927 reviews
7.3Comfort
7.1Entertainment
8.1Crew
7.7Boarding
6.7Food
Airline reviews

Great staff. Clean plane, but we were delayed for more than an hour due to maintenance issues and had to board another plane.

8.0 ExcellentNico, Jun 2026
LAX - HNL
Read more United Airlines reviews

Great staff. Clean plane, but we were delayed for more than an hour due to maintenance issues and had to board another plane.

I was very disappointed with my experience at the United Airlines baggage check. The representative was rude and unhelpful. I was required to remove approximately 1.5 pounds from my two checked bags, even though it was a very small amount over the limit. The interaction was unnecessarily unpleasant, and I expected much better customer service. I hope United will review this incident and provide additional customer service training to its staff.

No extra snacks were available. Meals quality is terrible. Crew was not friendly.

Lost one piece of luggage even though I checked in 2.5 hours before the flight

The boarding process on the departure from LA was rather slow even though I was in Group 1. For first class, I was not expecting to have to pay for Wi-fi but I did and then the wi-fi was spotty. The entree was surprisingly good and so that was a pleasant surprise. However, once I got to Houston, it was terrible. Unfortunately there was bad weather but the constant gate changes for my connecting flight was difficult to manage due to having to navigate back and forth between different terminals.

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

I had enough leg room. The check in was smooth. Good food

The boarding timing needs to be improved. The flight was delayed again because it took way too long to board. I was already exhausted from sleeping at the airport and spending all day there due to delay from my previous flight that connected in Chicago.

Kayak, the site I went through to book our flight, sent very unclear emails about flight changes. Kayak was incredibly unhelpful in their communications with me about this, promising to work on resolving the issue, and failing to do so. As a result, I needed to get a hotel in Brussels and am now in the process of trying to get reimbursed. On the other hand, the flight personnel in Brussels were very helpful, taking time to look into the issue and determine if they could help. I am very grateful for them and have no problems with the airline. For Kayak, however, I will never use it again and will never recommend it to anyone, and will even discourage people who consider going through that site. My worst experience ever....

Everything you need to know for your flight from Ontario to Brussels

Information on your arrival and departure airports