ONT - OTP

$336 Find Cheap Flights from Ontario to Bucharest

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 Otopeni Intl 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 Bucharest Otopeni Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Bucharest, 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 Bucharest, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$797
United Airlines
Wed 9/30Wed 10/14
ONT - OTP • 2 stops
Cheapest one-way
$336
British Airways
Wed 8/26
ONT - OTP • 2 stops
Top airlines
United Airlines
Cheapest • from $797 (round-trip)
United Airlines
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 Otopeni Intl. You'll need at least 2 connections.
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Otopeni Intl!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Otopeni Intl (ONT-OTP)

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

Wed, Sep 30 - Wed, Oct 14
United Airlines Logo
1:18 pm - 4:20 pm
ONT
-
OTP
17h 02m
2 stops
United Airlines Logo
12:45 pm - 10:26 pm
OTP
-
ONT
19h 41m
2 stops
$797United Airlines
Sun, Oct 25 - Sun, Nov 8
United Airlines Logo
5:00 am - 6:40 pm
ONT
-
OTP
28h 40m
2 stops
United Airlines Logo
7:10 pm - 10:26 pm
OTP
-
ONT
37h 16m
2 stops
$800United Airlines
Tue, Oct 27 - Tue, Nov 10
Multiple Airlines Logo
10:25 am - 2:45 pm
ONT
-
OTP
19h 20m
2 stops
Multiple Airlines Logo
8:00 am - 10:23 pm
OTP
-
ONT
24h 23m
2 stops
$825Multiple Airlines
Mon, Oct 26 - Mon, Nov 9
British Airways Logo
2:22 pm - 11:00 pm
ONT
-
OTP
23h 38m
2 stops
British Airways Logo
8:05 am - 10:23 pm
OTP
-
ONT
24h 18m
2 stops
$847British Airways
Tue, Oct 27 - Tue, Nov 10
Multiple Airlines Logo
10:25 am - 2:45 pm
ONT
-
OTP
19h 20m
2 stops
Multiple Airlines Logo
8:00 am - 10:23 pm
OTP
-
ONT
24h 23m
2 stops
$860Multiple Airlines
Mon, Sep 28 - Mon, Oct 12
United Airlines Logo
4:03 pm - 11:50 pm
ONT
-
OTP
21h 47m
2 stops
United Airlines Logo
1:50 pm - 10:59 pm
OTP
-
ONT
19h 09m
2 stops
$905United Airlines
Mon, May 11 - Sat, May 23
United Airlines Logo
10:37 am - 6:35 pm
ONT
-
OTP
21h 58m
2 stops
United Airlines Logo
12:45 pm - 10:50 pm
OTP
-
ONT
20h 05m
2 stops
$914United Airlines
Thu, Oct 1 - Thu, Oct 15
British Airways Logo
10:25 am - 1:20 am
ONT
-
OTP
28h 55m
2 stops
British Airways Logo
8:15 am - 9:08 pm
OTP
-
ONT
22h 53m
2 stops
$928British Airways
Tue, Oct 27 - Tue, Nov 10
United Airlines Logo
1:00 pm - 2:05 pm
ONT
-
OTP
16h 05m
2 stops
United Airlines Logo
6:05 am - 5:47 pm
OTP
-
ONT
21h 42m
2 stops
$934United Airlines
Wed, Oct 7 - Sat, Oct 17
British Airways Logo
12:35 pm - 12:20 am
ONT
-
OTP
25h 45m
2 stops
British Airways Logo
8:15 am - 9:08 pm
OTP
-
ONT
22h 53m
2 stops
$964British Airways
Booking Insights

KAYAK's insights & trends for Ontario to Otopeni Intl flights

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

Which airlines provide the cheapest flights from Ontario to Bucharest?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Ontario to Bucharest were found on United Airlines ($797) and British Airways ($847).

Find deals

Good to know

Cheapest flight$336
Flight from Ontario to Bucharest

When to book flights from Ontario to Otopeni Intl

Are your dates flexible? Find out the best times to travel from Ontario to Otopeni Intl 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 Bucharest flights

  • What is the cheapest flight from Ontario to Bucharest Otopeni Intl Airport?

    In the last 3 days, the lowest price for a flight from Ontario to Bucharest Otopeni Intl Airport was $336 for a one-way ticket and $797 for a round-trip.

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

    A passport is required to fly from Ontario to Bucharest.

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

    When flying out of Ontario you will be using Ontario. You will be landing at Bucharest, also known as Bucharest Otopeni Intl.

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

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

  • Which airline alliances offer flights from Ontario to Bucharest?

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

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

    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 Bucharest.

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

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

    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 Bucharest with an airline and back to Ontario with another airline. Booking your flights between Ontario and OTP 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 Bucharest?

    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 Bucharest 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 Otopeni Intl

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Bucharest. 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 Otopeni Intl? 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 9675 reviews
6.6Food
7.7Boarding
7.1Entertainment
8.1Crew
7.3Comfort
Airline reviews

Some crew were unfriendly or in some cases just straight up rude.

6.0 GoodAnonymous, Apr 2026
SFO - YVR
Read more United Airlines reviews

Some crew were unfriendly or in some cases just straight up rude.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

Flight itself excellent, but delayed so missed connection & got to destination 2 hrs later

Due to cancellation of connecting flight (Lufthansa) I didn’t fly with United

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

It was perfect! I've never flown with United before, but I definitely will in the future

Everything you need to know for your flight from Ontario to Otopeni Intl

Information on your arrival and departure airports

Ontario (ONT)
Otopeni Intl (OTP)