$432 Find Cheap Flights from Ontario to Romania - Compare and Save

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Book Cheap Ontario to Romania Plane Tickets

 

Cheap flights from Ontario with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Sun, Nov 29 - Tue, Dec 8
United Airlines Logo
4:17 pm - 11:55 pmONT  Ontario-OTP Bucharest Otopeni Intl
21h 38m2 stops San Francisco Frankfurt am Main
United Airlines Logo
6:00 am - 6:44 pmOTP  Bucharest Otopeni Intl-ONT Ontario
22h 44m2 stops Frankfurt am Main Chicago O'Hare Intl
$730United Airlines
Tue, Nov 24 - Tue, Dec 15
United Airlines Logo
4:17 pm - 11:55 pmONT  Ontario-OTP Bucharest Otopeni Intl
21h 38m2 stops San Francisco Frankfurt am Main
United Airlines Logo
6:00 am - 6:44 pmOTP  Bucharest Otopeni Intl-ONT Ontario
22h 44m2 stops Frankfurt am Main Chicago O'Hare Intl
$730United Airlines
Wed, Dec 2 - Wed, Dec 9
United Airlines Logo
5:45 am - 1:55 pmONT  Ontario-OTP Bucharest Otopeni Intl
22h 10m2 stops Houston George Bush Intcntl Frankfurt am Main
United Airlines Logo
6:00 am - 8:38 pmOTP  Bucharest Otopeni Intl-ONT Ontario
24h 38m2 stops Frankfurt am Main San Francisco
$730United Airlines
Tue, Nov 24 - Thu, Dec 17
United Airlines Logo
4:17 pm - 11:55 pmONT  Ontario-OTP Bucharest Otopeni Intl
21h 38m2 stops San Francisco Frankfurt am Main
United Airlines Logo
6:00 am - 10:53 pmOTP  Bucharest Otopeni Intl-ONT Ontario
26h 53m2 stops Munich Franz Josef Strauss San Francisco
$732United Airlines
Tue, Dec 8 - Tue, Dec 22
United Airlines Logo
4:17 pm - 11:55 pmONT  Ontario-OTP Bucharest Otopeni Intl
21h 38m2 stops San Francisco Frankfurt am Main
United Airlines Logo
1:15 pm - 10:53 pmOTP  Bucharest Otopeni Intl-ONT Ontario
19h 38m2 stops Munich Franz Josef Strauss San Francisco
$732United Airlines
Tue, Jan 19 - Tue, Feb 2
British Airways Logo
4:19 pm - 12:05 amONT  Ontario-OTP Bucharest Otopeni Intl
21h 46m2 stops Phoenix Sky Harbor Intl London Heathrow
British Airways Logo
8:20 am - 11:13 pmOTP  Bucharest Otopeni Intl-ONT Ontario
24h 53m2 stops London Heathrow Dallas/Fort Worth
$733British Airways
Tue, Mar 16 - Tue, Mar 30
United Airlines Logo
6:30 am - 1:55 pmONT  Ontario-OTP Bucharest Otopeni Intl
22h 25m2 stops Chicago O'Hare Intl Frankfurt am Main
United Airlines Logo
1:45 pm - 11:06 pmOTP  Bucharest Otopeni Intl-ONT Ontario
19h 21m2 stops Frankfurt am Main San Francisco
$735United Airlines
Tue, Feb 16 - Tue, Mar 2
United Airlines Logo
5:00 am - 1:55 pmONT  Ontario-OTP Bucharest Otopeni Intl
22h 55m2 stops Denver Intl Frankfurt am Main
United Airlines Logo
6:00 am - 8:20 pmOTP  Bucharest Otopeni Intl-ONT Ontario
24h 20m3 stops Frankfurt am Main Newark Denver Intl
$736United Airlines
Wed, Jan 13 - Wed, Jan 27
United Airlines Logo
5:00 am - 1:55 pmONT  Ontario-OTP Bucharest Otopeni Intl
22h 55m2 stops Denver Intl Frankfurt am Main
United Airlines Logo
6:00 am - 6:50 pmOTP  Bucharest Otopeni Intl-ONT Ontario
22h 50m2 stops Frankfurt am Main Chicago O'Hare Intl
$736United Airlines
Tue, Nov 17 - Tue, Nov 24
British Airways Logo
10:30 am - 3:05 pmONT  Ontario-OTP Bucharest Otopeni Intl
18h 35m2 stops Dallas/Fort Worth London Heathrow
British Airways Logo
8:20 am - 9:52 pmOTP  Bucharest Otopeni Intl-ONT Ontario
23h 32m2 stops London Heathrow Phoenix Sky Harbor Intl
$804British Airways

Price, demand and travel trends for Ontario to Romania flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

What are the cheapest fares from Ontario to Romania right now?

The cheapest fare from Ontario to Romania in the last week was $730 round-trip, to Bucharest Otopeni Intl (OTP).

Which airport in Romania is the cheapest to fly to from Ontario?

All flights from Ontario to Romania arrive at Bucharest Otopeni Intl (OTP). On average, round-trip fares are around $894.

What’s the cheapest day to fly from Ontario to Romania?

Friday tends to be the cheapest day to fly from Ontario to Romania, while Saturday is the most expensive. Fares run about 44% higher that day, based on the past 12 months of KAYAK data.

What's the cheapest time of day to fly from Ontario to Romania?

Data from the past 12 months shows it's cheapest to fly to Romania during the afternoon with average prices of $838. The evening is the most expensive time to fly, with average prices of $1,027.

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Key details for Ontario to Romania flights

Cheapest flight

$432
The most popular month to fly with an average 21% increase in travelers.
One-way flight from Ontario to Bucharest Otopeni Intl Airport

Your Ontario to Romania flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from Ontario to Romania?

    Yes. Fares from Ontario to Romania are low right now. As a rule of thumb, a round-trip under $751 (cheaper than most fares this year) is a good deal, so if you spot one at or below that, it's a good time to book.

  • How much should I budget for a flight from Ontario to Romania?

    Over the past 12 months, round-trip fares from Ontario to Romania have ranged from $751 to $1,029.

  • Which cabin classes are available on flights from Ontario to Romania?

    On flights from Ontario to Romania you can only book Economy Class.

  • What are some popular landmarks in Romania?

    KAYAK travelers' favorite landmarks in Romania include:

    • Palace of the Parliament
    • Piata Sfatului
    • National Theatre Bucharest
    • RomExpo

Your guide to booking Ontario to Romania flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your travel dates are flexible, book your trip for April when flights are typically cheapest and avoid October when prices are at their highest.
  • Flying on Friday is usually the cheapest. Flights on Saturday cost about 44% more on average, so being flexible with your travel dates could help you save.
  • Start your trip in Bucharest, which is the most popular destination in Romania. From there, it's easy to continue on to other popular destinations such as Braşov, Cluj Napoca and Timisoara.

Reviews of the top airline 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.
7.3
United AirlinesOverall score based on 10388 reviews
8.1Crew
7.3Comfort
6.7Food
7.1Entertainment
7.7Boarding
Airline reviews

I have been flying united for a long time but now I’m done

2.0 MediocreRobert, Oct 2026
Read more United Airlines reviews

I have been flying united for a long time but now I’m done

Delayed - leaving, delayed getting to the gate at destination. What should have been a very easy flight and experience was not.

Better management of the boarding process. Is there any way you could forward all the window seats first? That's the Way Reno Air used to do it, and they had the fastest boarding in the industry!

Wifi is very frustrating - could not connect and therefore unable to work on the trip

Entertainment was great. Seats were good. They did not have my pre-ordered hot food product available but did comp me something cold in place of the item.

Food was good. Clean aircraft. But why do the airlines make the seats so narrow?! Your executives should have ride in a seat so restrictive for 11 hours and see how miserable it is! When.we got to MUC they changed my boarding gate 3 times for my next flight!!!!

Santa Barbara is a super small and easy airport. Breezed through rental car return, breezed through Security, ordered a coffee and muffin and to my gate in less than 30 minutes. Maybe because it was a small airport we got the oldest plane. Hardly any overhead space and absolutely zero internet. Its NFL Sunday man! That hurt.

We were delay because so many bags needed to be gate checked and it was disappointing not to have outlets in the seats for such a long flight.

overall a very good travel experience - left on time, arrived early. Mostly a smooth flight. Polaris seats were excellent, very good service and nice food with options.

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

More options for your flight from Ontario to Romania

Complete your trip to Romania with a hotel stay or car rental

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