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$412+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OTP
Dec 10 — Dec 171
Wed 12/10
Wed 12/17
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 November 10, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$488
(United Airlines)

One-way from

$412
(United Airlines)

Popular in

December

Cheapest in

October

Average price

$639
Provider with most accurate pricing for Los Angeles-Bucharest (BUH) flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Bucharest (BUH) flights.
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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. 10% potential increase in price ($83 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 10, 2025.

This United Airlines deal was found by Cheapflights users on 11/9. 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 12/2910:42 amONT - CLJ
2 stops16h 58mUnited Airlines
Wed 1/146:00 amCLJ - ONT
2 stops24h 58mUnited Airlines
Deal found 11/9$488
This United Airlines deal was found by Cheapflights users on 11/8. 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 12/291:40 pmONT - OTP
2 stops18h 55mUnited Airlines
Mon 1/122:50 pmOTP - ONT
2 stops18h 03mUnited Airlines
Deal found 11/8$522
This United Airlines deal was found by Cheapflights users on 11/8. 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 11/285:05 amONT - CLJ
2 stops22h 35mUnited Airlines
Thu 12/116:00 amCLJ - ONT
2 stops24h 42mUnited Airlines
Deal found 11/8$613
This United Airlines deal was found by Cheapflights users on 11/8. 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 11/271:40 pmONT - CLJ
2 stops38h 00mUnited Airlines
Wed 12/172:25 pmCLJ - ONT
2 stops18h 24mUnited Airlines
Deal found 11/8$619
This United Airlines deal was found by Cheapflights users on 11/8. 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 11/309:35 pmONT - OTP
2 stops35h 00mUnited Airlines
Sun 12/145:55 amOTP - ONT
2 stops40h 22mUnited Airlines
Deal found 11/8$628
This United Airlines deal was found by Cheapflights users on 11/8. 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 11/285:05 amONT - CLJ
2 stops22h 35mUnited Airlines
Mon 12/156:00 amCLJ - ONT
2 stops26h 49mUnited Airlines
Deal found 11/8$632
This Iberia deal was found by Cheapflights users on 11/8. 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 11/1010:47 amONT - OTP
2 stops18h 43mMultiple Airlines
Mon 11/248:05 amOTP - ONT
2 stops24h 34mMultiple Airlines
Deal found 11/8$641
This Iberia deal was found by Cheapflights users on 11/10. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:00 amONT - OTP
2 stops21h 45mMultiple Airlines
Mon 11/178:05 amOTP - ONT
2 stops24h 24mMultiple Airlines
Deal found 11/10$642
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Tue 12/21:50 pmONT - OTP
2 stops24h 05mUnited Airlines
Tue 12/165:55 amOTP - ONT
2 stops21h 42mUnited Airlines
Deal found 11/10$660
This United Airlines deal was found by Cheapflights users on 11/9. 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 12/76:00 amONT - OTP
2 stops22h 05mUnited Airlines
Sun 12/145:55 amOTP - ONT
2 stops21h 42mUnited Airlines
Deal found 11/9$685
This United Airlines deal was found by Cheapflights users on 11/8. 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 12/101:50 pmONT - OTP
2 stops24h 05mUnited Airlines
Wed 12/246:05 amOTP - ONT
2 stops25h 02mUnited Airlines
Deal found 11/8$710
This United Airlines deal was found by Cheapflights users on 11/9. 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 12/51:34 pmONT - OTP
2 stops19h 01mUnited Airlines
Thu 12/115:50 amOTP - ONT
2 stops24h 52mUnited Airlines
Deal found 11/9$747

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 November 10, 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 12/29

1:40 pm-6:35 pm

2 stops18h 55m

Bucharest Otopeni Intl

Mon 1/12

2:50 pm-10:53 pm

2 stops18h 03m

$522

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 4/13

11:00 am-6:35 pm

2 stops21h 35m

Bucharest Otopeni Intl

Mon 4/27

1:50 pm-11:06 pm

2 stops19h 16m

$549

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 5/5

1:00 pm-6:35 pm

2 stops19h 35m

Bucharest Otopeni Intl

Mon 5/18

1:50 pm-11:06 pm

2 stops19h 16m

$589

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Fri 4/24

5:10 am-5:25 pm

2 stops26h 15m

Cluj Napoca

Sat 5/2

6:00 am-11:06 pm

2 stops27h 06m

$596

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Fri 4/24

7:00 am-6:35 pm

2 stops25h 35m

Bucharest Otopeni Intl

Sat 5/2

1:50 pm-11:06 pm

2 stops19h 16m

$599

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 3/29

11:00 am-6:35 pm

2 stops21h 35m

Bucharest Otopeni Intl

Tue 4/14

6:05 am-5:47 pm

2 stops21h 42m

$599

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 4/9

11:01 am-2:30 pm

2 stops17h 29m

Bucharest Otopeni Intl

Mon 4/20

8:25 am-9:56 pm

2 stops23h 31m

$603

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Fri 11/28

5:05 am-1:40 pm

2 stops22h 35m

Cluj Napoca

Thu 12/11

6:00 am-8:42 pm

2 stops24h 42m

$613

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Sat 11/29

5:05 am-1:40 pm

2 stops22h 35m

Cluj Napoca

Wed 12/10

6:00 am-5:37 pm

2 stops21h 37m

$613

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Fri 11/28

5:05 am-1:40 pm

2 stops22h 35m

Cluj Napoca

Fri 12/12

2:25 pm-10:49 pm

2 stops18h 24m

$613

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 26 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 $684). 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 November 10, 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 18h 55m. 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, 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 $684). 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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