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$340+ 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 7/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OTP
Apr 24 — May 11
Fri 4/24
Fri 5/1
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 March 25, 2026.

This United Airlines deal was found by Cheapflights users on 3/22. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2111:05 am
ONT
-
OTP
2 stops21h 30m
United Airlines
Tue 4/286:05 am
OTP
-
ONT
2 stops21h 57m
United Airlines
Deal found 3/22$671
This United Airlines deal was found by Cheapflights users on 3/23. 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 11/165:00 am
ONT
-
CLJ
2 stops22h 40m
United Airlines
Fri 11/206:00 am
CLJ
-
ONT
2 stops25h 21m
United Airlines
Deal found 3/23$702
This United Airlines deal was found by Cheapflights users on 3/22. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:30 am
ONT
-
OTP
2 stops19h 30m
United Airlines
Wed 9/3012:45 pm
OTP
-
ONT
2 stops19h 41m
United Airlines
Deal found 3/22$703
This United Airlines deal was found by Cheapflights users on 3/24. 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.
Mon 4/271:34 pm
ONT
-
OTP
2 stops19h 01m
United Airlines
Tue 5/51:50 pm
OTP
-
ONT
2 stops19h 09m
United Airlines
Deal found 3/24$715
This United Airlines deal was found by Cheapflights users on 3/22. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/25:00 am
ONT
-
CLJ
2 stops22h 40m
United Airlines
Sun 12/66:00 am
CLJ
-
ONT
2 stops24h 20m
United Airlines
Deal found 3/22$717
This Air France deal was found by Cheapflights users on 3/23. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/112:00 pm
ONT
-
OTP
2 stops17h 50m
Multiple Airlines
Sat 11/146:00 pm
OTP
-
ONT
2 stops32h 12m
Multiple Airlines
Deal found 3/23$719
This United Airlines deal was found by Cheapflights users on 3/22. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:05 am
ONT
-
OTP
2 stops21h 30m
United Airlines
Thu 5/71:45 pm
OTP
-
ONT
2 stops19h 14m
United Airlines
Deal found 3/22$721
This Delta deal was found by Cheapflights users on 3/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:00 am
ONT
-
OTP
2 stops24h 10m
Delta
Sat 11/146:00 am
OTP
-
ONT
2 stops22h 18m
Delta
Deal found 3/20$723
This United Airlines deal was found by Cheapflights users on 3/23. 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.
Sun 4/261:34 pm
ONT
-
OTP
2 stops19h 01m
United Airlines
Sat 5/21:55 pm
OTP
-
ONT
2 stops37h 57m
United Airlines
Deal found 3/23$741
This United Airlines deal was found by Cheapflights users on 3/24. 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.
Fri 5/81:30 pm
ONT
-
OTP
2 stops25h 40m
United Airlines
Fri 5/156:05 am
OTP
-
ONT
2 stops26h 30m
United Airlines
Deal found 3/24$752
This United Airlines deal was found by Cheapflights users on 3/22. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/45:45 am
ONT
-
CLJ
2 stops25h 40m
United Airlines
Thu 12/36:00 am
CLJ
-
ONT
2 stops27h 06m
United Airlines
Deal found 3/22$757
This United Airlines deal was found by Cheapflights users on 3/21. 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 4/127:00 am
ONT
-
CLJ
2 stops24h 25m
United Airlines
Tue 4/211:50 pm
CLJ
-
ONT
2 stops18h 41m
United Airlines
Deal found 3/21$767

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 March 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$671
(United Airlines)

One-way from

$340
(oojo)

Popular in

June

Cheapest in

January

Average price

$598
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. 12% potential increase in price ($91 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 25, 2026.
Use the filters below to find and compare flights from Ontario to Romania that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 4/21

11:05 am-6:35 pm

2 stops21h 30m

Bucharest Otopeni Intl

Tue 4/28

6:05 am-6:02 pm

2 stops21h 57m

$671

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Fri 5/8

1:30 pm-1:10 am

2 stops25h 40m

Bucharest Otopeni Intl

Fri 5/15

6:05 am-10:35 pm

2 stops26h 30m

$752

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Sat 7/4

5:45 am-5:25 pm

2 stops25h 40m

Cluj Napoca

Thu 12/3

6:00 am-11:06 pm

2 stops27h 06m

$757

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Thu 4/23

11:05 am-5:25 pm

2 stops20h 20m

Cluj Napoca

Tue 5/5

6:00 am-9:58 pm

2 stops25h 58m

$767

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Fri 5/8

6:59 pm-6:35 pm

2 stops37h 36m

Bucharest Otopeni Intl

Mon 5/25

6:55 pm-10:46 pm

2 stops37h 51m

$772

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Mon 7/6

1:50 pm-5:25 pm

3 stops41h 35m

Cluj Napoca

Tue 9/1

1:50 pm-10:58 pm

2 stops19h 08m

$788

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Sun 5/17

6:59 pm-5:25 pm

3 stops36h 26m

Cluj Napoca

Fri 6/19

6:00 am-10:46 pm

2 stops26h 46m

$827
Quickest round-trip

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Sun 5/17

10:37 am-5:25 pm

2 stops20h 48m

Cluj Napoca

Tue 6/16

1:50 pm-10:37 pm

2 stops18h 47m

$827

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Sun 5/17

10:37 am-5:25 pm

2 stops20h 48m

Cluj Napoca

Thu 6/18

6:00 am-5:56 pm

2 stops21h 56m

$827

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Sun 5/17

6:59 pm-5:25 pm

3 stops36h 26m

Cluj Napoca

Wed 6/17

1:50 pm-10:46 pm

2 stops18h 56m

$877

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/23

Showing 1-10 of 42 resultsSorted by cheapest first
1
2
3
...
5

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 $679). 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.

Reviews of airlines servicing Romania

Get insights into the airlines that provide service to Romania. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Romania. Reviews last updated March 25, 2026.
Peruse reviews from past customers who have flown with United Airlines from Ontario to Romania to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,477 reviews

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
9,477 reviews
United Airlines
7.4
Good
9,477 reviews

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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 30m. 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 $679). 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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Top airline flying from Ontario to Romania

Discover the top airline that operate flights from Ontario to Romania. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$539Average$614FlexibilityNo cancel feeOn-time69%

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