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$411+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OTP
Aug 29 — Sep 51
Fri 8/29
Fri 9/5
1 adult, Economy
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Cheap flight deals from Ontario to Romania

Keep the following information in mind while searching for Ontario to Romania flight deals. Data was last updated August 24, 2025.

Round-trip from

$518
(United Airlines)

One-way from

$411
(Delta)

Popular in

December

Cheapest in

October

Average price

$774
From Ontario to Romania
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One-way flight from Ontario to Romania
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Highest demand for flights based on searches. 9% potential increase in price ($75 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 24, 2025.

This United Airlines deal was found by Cheapflights users on 8/23. 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 10/287:00 amONT - OTP
2 stops23h 45mMultiple Airlines
Tue 11/112:50 pmOTP - ONT
2 stops18h 01mMultiple Airlines
Deal found 8/23$518
This United Airlines deal was found by Cheapflights users on 8/23. 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.
Mon 10/275:05 amONT - OTP
2 stops28h 30mUnited Airlines
Thu 11/135:50 amOTP - ONT
2 stops40h 43mUnited Airlines
Deal found 8/23$521
This United Airlines deal was found by Cheapflights users on 8/23. 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 10/256:36 pmONT - OTP
2 stops38h 49mUnited Airlines
Tue 11/112:50 pmOTP - ONT
2 stops18h 01mUnited Airlines
Deal found 8/23$525
This United deal was found by Cheapflights users on 8/24. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:00 amONT - CLJ
2 stops25h 20mMultiple Airlines
Wed 11/56:00 amCLJ - ONT
2 stops24h 44mMultiple Airlines
Deal found 8/24$526
This United Airlines deal was found by Cheapflights users on 8/24. 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 10/198:16 pmONT - CLJ
2 stops35h 04mUnited Airlines
Mon 11/32:25 pmCLJ - ONT
2 stops38h 11mUnited Airlines
Deal found 8/24$531
This United Airlines deal was found by Cheapflights users on 8/23. 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.
Mon 10/271:29 pmONT - OTP
2 stops20h 06mUnited Airlines
Mon 11/102:50 pmOTP - ONT
2 stops37h 46mUnited Airlines
Deal found 8/23$540
This United Airlines deal was found by Cheapflights users on 8/23. 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 10/256:36 pmONT - OTP
2 stops38h 49mUnited Airlines
Mon 11/102:50 pmOTP - ONT
2 stops37h 46mUnited Airlines
Deal found 8/23$544
This Iberia deal was found by Cheapflights users on 8/23. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2411:00 amONT - OTP
2 stops26h 30mMultiple Airlines
Wed 1/78:05 amOTP - ONT
2 stops23h 57mMultiple Airlines
Deal found 8/23$548
This United Airlines deal was found by Cheapflights users on 8/23. 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 10/311:29 pmONT - OTP
2 stops20h 06mUnited Airlines
Wed 11/126:05 amOTP - ONT
2 stops24h 39mUnited Airlines
Deal found 8/23$571
This United Airlines deal was found by Cheapflights users on 8/23. 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.
Thu 10/305:05 amONT - OTP
2 stops28h 35mUnited Airlines
Thu 11/135:50 amOTP - ONT
2 stops24h 54mUnited Airlines
Deal found 8/23$575
This United deal was found by Cheapflights users on 8/22. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/305:05 amONT - CLJ
2 stops23h 35mMultiple Airlines
Thu 11/206:00 amCLJ - ONT
2 stops21h 34mMultiple Airlines
Deal found 8/22$576
This Iberia deal was found by Cheapflights users on 8/22. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2210:53 amONT - OTP
2 stops20h 32mMultiple Airlines
Thu 10/238:25 amOTP - ONT
2 stops23h 53mMultiple Airlines
Deal found 8/22$578

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 August 24, 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

Tue 10/28

7:00 am-3:45 pm

2 stops23h 45m

Bucharest Otopeni Intl

Tue 11/11

2:50 pm-10:51 pm

2 stops18h 01m

$518

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 10/27

1:29 pm-6:35 pm

2 stops20h 06m

Bucharest Otopeni Intl

Tue 11/11

5:55 am-10:51 pm

2 stops26h 56m

$521

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 10/27

5:05 am-6:35 pm

2 stops28h 30m

Bucharest Otopeni Intl

Fri 11/14

5:55 am-5:34 pm

2 stops45h 39m

$521

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 10/27

5:05 am-6:35 pm

2 stops28h 30m

Bucharest Otopeni Intl

Thu 11/13

5:50 am-12:33 pm

2 stops40h 43m

$521

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 10/27

1:29 pm-6:35 pm

2 stops20h 06m

Bucharest Otopeni Intl

Wed 11/12

6:05 am-8:44 pm

2 stops24h 39m

$521

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 10/29

1:33 pm-11:55 pm

2 stops25h 22m

Bucharest Otopeni Intl

Tue 11/11

5:55 am-6:36 pm

2 stops22h 41m

$525

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 1/7

6:00 am-2:00 pm

2 stops22h 00m

Bucharest Otopeni Intl

Thu 1/22

5:50 am-8:58 pm

2 stops25h 08m

$525

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 10/26

5:05 am-11:50 pm

2 stops33h 45m

Bucharest Otopeni Intl

Tue 11/11

5:55 am-6:36 pm

2 stops22h 41m

$525

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 1/7

7:00 am-2:00 pm

2 stops21h 00m

Bucharest Otopeni Intl

Wed 1/21

6:05 am-8:58 pm

2 stops24h 53m

$525

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 10/26

7:00 am-6:25 pm

2 stops26h 25m

Bucharest Otopeni Intl

Fri 11/14

5:55 am-10:51 pm

2 stops26h 56m

$525

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/22

Showing 1-10 of 33 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, November is the cheapest month in which you can book a flight from Ontario to Romania (average of $604). Flying from Ontario to Romania in June is currently the most expensive (average of $1,135). 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 August 24, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Romania as you normally would.

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 20h 06m. Ontario and Romania are separated by a distance of 6541 mi.

  • 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, November is the cheapest month in which you can book a flight from Ontario to Romania (average of $604). Flying from Ontario to Romania in June is currently the most expensive (average of $1,135). 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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