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$374+ Cheap flights from Ontario (ONT) to Romania

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OTP
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Ontario to Romania

Cheapest flights from Ontario to Romania
Explore the most affordable flight options available from Ontario to Romania. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/106:00 amONT - OTP
2 stops22h 00mUnited Airlines
Wed 12/172:40 pmOTP - ONT
2 stops29h 21mUnited Airlines
Deal found 12/10$712
This United Airlines deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/271:40 pmONT - OTP
2 stops48h 10mUnited Airlines
Fri 1/95:55 amOTP - ONT
3 stops40h 22mUnited Airlines
Deal found 12/11$848
This United Airlines deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:00 amONT - OTP
2 stops31h 50mUnited Airlines
Fri 1/95:55 amOTP - ONT
2 stops25h 03mUnited Airlines
Deal found 12/11$1,145
This United Airlines deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/241:40 pmONT - OTP
2 stops48h 10mUnited Airlines
Wed 12/312:40 pmOTP - ONT
2 stops41h 45mUnited Airlines
Deal found 12/10$1,150
This United Airlines deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:42 amONT - OTP
2 stops17h 13mUnited Airlines
Mon 1/52:50 pmOTP - ONT
2 stops42h 03mUnited Airlines
Deal found 12/11$1,308
This United Airlines deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amONT - OTP
2 stops31h 55mUnited Airlines
Sun 1/42:50 pmOTP - ONT
2 stops40h 18mUnited Airlines
Deal found 12/11$1,558
This United Airlines deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/146:41 pmONT - OTP
2 stops43h 14mUnited Airlines
Tue 1/65:55 amOTP - ONT
2 stops26h 58mUnited Airlines
Deal found 12/11$1,575
This KAYAK deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1310:47 amONT - OTP
2 stops18h 18mBritish Airways
Tue 12/308:00 amOTP - ONT
2 stops24h 14mBritish Airways
Deal found 12/10$1,673

Find flight deals from Ontario to Romania

Keep the following information in mind while searching for Ontario to Romania flight deals. Data was last updated December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$463
(Iberia)

One-way from

$374
(oojo)

Popular in

June

Cheapest in

October

Average price

$812
Provider with most accurate pricing for Los Angeles-Bucharest (BUH) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Bucharest (BUH) flights.
Search Deals
From Ontario to Romania
Search Deals
One-way flight from Ontario to Romania
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($66 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Romania that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
Use the filters below to find and compare flights from Ontario to Romania that are best for you.

Fly from

Ontario

Fly to

Romania

Route

Depart

Return

Price

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 1/12

10:58 am-3:30 pm

2 stops18h 32m

Bucharest Otopeni Intl

Wed 1/28

8:05 am-10:48 pm

2 stops24h 43m

$464

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 1/11

4:45 pm-11:45 pm

2 stops21h 00m

Bucharest Otopeni Intl

Sun 1/25

7:35 am-10:48 pm

2 stops25h 13m

$492

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Sun 1/11

6:39 pm-1:40 pm

2 stops33h 01m

Cluj Napoca

Tue 3/24

6:00 am-10:57 pm

2 stops25h 57m

$497

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 3/29

5:02 pm-12:45 am

2 stops21h 43m

Bucharest Otopeni Intl

Sun 4/5

8:20 am-11:59 pm

2 stops25h 39m

$497

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Sun 1/11

1:53 pm-1:40 pm

2 stops37h 47m

Cluj Napoca

Thu 3/26

6:00 am-8:50 pm

2 stops23h 50m

$497

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Sun 1/11

1:53 pm-1:40 pm

2 stops37h 47m

Cluj Napoca

Wed 3/25

6:00 am-10:25 pm

2 stops25h 25m

$497

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 4/9

11:01 am-2:30 pm

2 stops17h 29m

Bucharest Otopeni Intl

Thu 5/7

8:25 am-9:56 pm

2 stops23h 31m

$513

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 4/14

11:01 am-3:25 pm

2 stops18h 24m

Bucharest Otopeni Intl

Mon 4/27

8:25 am-9:56 pm

2 stops23h 31m

$513

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 2/10

5:05 am-1:55 pm

2 stops22h 50m

Bucharest Otopeni Intl

Wed 4/8

1:50 pm-11:06 pm

2 stops19h 16m

$513

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 2/8

1:53 pm-11:50 pm

2 stops23h 57m

Bucharest Otopeni Intl

Tue 4/7

1:50 pm-11:06 pm

2 stops19h 16m

$513

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 36 results
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Best time to book a flight from Ontario to Romania

Have a flexible travel schedule? Discover the best time to fly to Romania from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Ontario to Romania?

Currently, September is the cheapest month in which you can book a flight from Ontario to Romania (average of $441). Flying from Ontario to Romania in June is currently the most expensive (average of $687). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to RO?

Find hourly flight availability from Ontario to Romania. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

One of the essential ways to save on airfare from Ontario to Romania is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 39% on airfare.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Romania. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Romania?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Romania from Ontario.

  • How long is the flight from Ontario to Romania?

    Departing from Ontario to Romania will take you 21h. Ontario and Romania are separated by a distance of 6541 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from Ontario to Romania that include hotel bookings?

    Yes. In addition to deals on Ontario to Romania flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Romania?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Romania.

  • Can I find deals for business class flights from Ontario to Romania?

    Yes. Cheapflights offers flight deals from Ontario to Romania by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Romania?

    Currently, September is the cheapest month in which you can book a flight from Ontario to Romania (average of $441). Flying from Ontario to Romania in June is currently the most expensive (average of $687). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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See prices for flight routes from nearby airports that may be better suited for you.
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