$360 Find Cheap Flights from Ontario to Romania

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 Romania departing on 9/2. 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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Flight Deals

Book Cheap Ontario to Romania 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 Romania 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 Romania

Wed, Dec 2 - Wed, Dec 16
Lufthansa Logo
5:00 am - 1:40 pm
ONT
-
CLJ
22h 40m
2 stops
Lufthansa Logo
2:25 pm - 11:06 pm
CLJ
-
ONT
18h 41m
2 stops
$717Lufthansa
Wed, Aug 12 - Fri, Aug 21
United Airlines Logo
7:00 am - 1:10 pm
ONT
-
CLJ
20h 10m
2 stops
United Airlines Logo
6:00 am - 6:11 pm
CLJ
-
ONT
22h 11m
2 stops
$718United Airlines
Sun, Jul 26 - Thu, Aug 20
United Airlines Logo
1:18 pm - 6:35 pm
ONT
-
OTP
43h 17m
2 stops
United Airlines Logo
1:45 pm - 10:59 pm
OTP
-
ONT
19h 14m
2 stops
$722United Airlines
Mon, Jul 27 - Wed, Aug 19
United Airlines Logo
1:18 pm - 6:35 pm
ONT
-
OTP
19h 17m
2 stops
United Airlines Logo
6:15 am - 8:53 pm
OTP
-
ONT
24h 38m
2 stops
$724United Airlines
Tue, Nov 3 - Tue, Nov 17
Multiple Airlines Logo
10:47 am - 2:45 pm
ONT
-
OTP
17h 58m
2 stops
Multiple Airlines Logo
8:00 am - 10:23 pm
OTP
-
ONT
24h 23m
2 stops
$725Multiple Airlines
Sun, Jul 26 - Tue, Aug 18
United Airlines Logo
1:18 pm - 6:35 pm
ONT
-
OTP
43h 17m
2 stops
United Airlines Logo
1:50 pm - 8:01 pm
OTP
-
ONT
40h 11m
3 stops
$742United Airlines
Sat, Jul 25 - Thu, Aug 20
United Airlines Logo
4:20 pm - 6:40 pm
ONT
-
OTP
40h 20m
2 stops
United Airlines Logo
1:45 pm - 10:59 pm
OTP
-
ONT
19h 14m
2 stops
$752United Airlines
Sun, Jul 26 - Thu, Aug 13
United Airlines Logo
1:18 pm - 6:35 pm
ONT
-
OTP
43h 17m
2 stops
United Airlines Logo
6:05 am - 10:35 pm
OTP
-
ONT
26h 30m
2 stops
$753United Airlines
Sat, Jul 25 - Wed, Aug 19
United Airlines Logo
4:20 pm - 6:40 pm
ONT
-
OTP
40h 20m
2 stops
United Airlines Logo
6:15 am - 6:16 pm
OTP
-
ONT
22h 01m
2 stops
$754United Airlines
Tue, Jul 28 - Thu, Aug 13
Delta Logo
11:59 am - 5:40 pm
ONT
-
OTP
19h 41m
2 stops
Delta Logo
6:00 am - 4:24 pm
OTP
-
ONT
20h 24m
2 stops
$761Delta
Booking Insights

KAYAK's insights & trends for Ontario to Romania flights

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

How long does a flight from Ontario to Romania take?

The duration of a flight to Romania depends on your arrival airport. The shortest routes to Romania from Ontario are to Bucharest, which takes 17h 58m, and Cluj Napoca, which takes 20h 10m.

Good to know

Cheapest flight$360
Flight from Ontario to Bucharest

FAQs - booking Romania flights

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

    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 Romania.

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

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

    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 Romania 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 Romania?

    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 Romania up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Ontario to Romania

 
Need help choosing which airline to fly with from Ontario to Romania? 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.
7.8
DeltaOverall score based on 8395 reviews
7.8Comfort
8.1Boarding
8.5Crew
7.8Entertainment
7.2Food
Airline reviews

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

10.0 ExcellentTeresa, Apr 2026
SMF - LAX
Read more Delta reviews

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

N Everything was perfect from boarding to assistance to baggage in Tampa

Loved the crew! Sucks that we went from 1 hour and 8 minute layover to a 3 hour layover. But weather sucks like that.

Fast, lovely scenery, great info on the Delta flight screen about landmarks we were flying over. Great landing!

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

I took seat 15A in anticipation of window seat, there is no window.

Flight late, the waited for a long time for “personal” to arrive at gate to dock the plane in Rochester. So annoying. This flight was expected, why aren’t personel available for the jet bridge?

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

Flight was delayed but more than 90 minutes. This caused me to miss my available windows for pick-up by a friend. I had to pay $125 for an uber back home from the airport which was an added expense that I had not budgeted for my trip. Staff was friendly.

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

Easy of boarding, helpfully staff at check in, surprisingly comfortable seating

Lost of requested seat assignments. Lost my husband's meal choice

My service dog and I were asked to deplane just before they closed the door - clearly very last minute they couldn’t find the documentation that I have filled out many many times before that is for flying service animals. I purposely purchase 3seats (a whole row) since he is large and not all passengers want to sit next to a dog on a cross country flight. The plane departed with my husband on it!!! They made me fill out a hard copy of the same form and had to reschedule me on a later flight where they could find 3 seats together!! I’ve done this so many times before - clearly the error was on their part in a technology glitch - but really people - do better!! Very traumatic - and my husband had to wait for us when he landed ….so bad. Poor pup was confused and tired.

Late plane. Only one crew on the ground so we b had to wait for Denver flight to come in, board, and depart. At 78 yrs of age I was not pleased trying to get my connection. What really made me angry was the notification you sent me to hurry up or I would miss my connection. Why tell me to hurry up when you got me in late. It was not a good way of treating customers.

My flight time was changed without any notification to me which ruined my time sensitive plans so I ended up completely changing my travel plans and no reimbursement.

No screens or meal options. Freezing cold. Dirty seats. Left late.

I liked that my son and I were reseated next to each other (we had different bookings). I liked that it was a directg flight and mostly on time. I liked that you provided pillows and blankets. Flight attendants were generally courteous. The messaging through wifi did not work well. The food was not good. Seats are very narrow and I felt slightly claustraphobic in the window seat.

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

Information on your arrival and departure airports