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$345+ 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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OTP
May 21 — May 281
Thu 5/21
Thu 5/28
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 April 21, 2026.

This Delta deal was found by Cheapflights users on 4/19. 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.
Mon 11/27:00 am
ONT
-
OTP
2 stops29h 50m
Delta
Wed 11/116:00 am
OTP
-
ONT
2 stops40h 30m
Delta
Deal found 4/19$721
This Delta deal was found by Cheapflights users on 4/19. 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
Thu 11/126:00 am
OTP
-
ONT
2 stops20h 12m
Delta
Deal found 4/19$726
This United Airlines deal was found by Cheapflights users on 4/18. 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 10/316:53 pm
ONT
-
OTP
2 stops38h 47m
United Airlines
Thu 11/127:10 pm
OTP
-
ONT
2 stops37h 16m
United Airlines
Deal found 4/18$751
This United Airlines deal was found by Cheapflights users on 4/18. 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 8/175:45 am
ONT
-
CLJ
2 stops25h 40m
United Airlines
Wed 9/91:50 pm
CLJ
-
ONT
2 stops38h 29m
United Airlines
Deal found 4/18$759
This United Airlines deal was found by Cheapflights users on 4/21. 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.
Wed 9/91:18 pm
ONT
-
OTP
2 stops17h 02m
United Airlines
Tue 9/226:05 am
OTP
-
ONT
2 stops22h 06m
United Airlines
Deal found 4/21$766
This Delta deal was found by Cheapflights users on 4/19. 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.
Thu 10/291:00 pm
ONT
-
OTP
2 stops24h 50m
Delta
Tue 11/176:00 am
OTP
-
ONT
2 stops20h 12m
Delta
Deal found 4/19$771
This KLM deal was found by Cheapflights users on 4/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/317:00 am
ONT
-
OTP
2 stops23h 25m
KLM
Fri 11/136:00 am
OTP
-
ONT
2 stops22h 18m
KLM
Deal found 4/18$775
This Delta deal was found by Cheapflights users on 4/19. 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 stops27h 48m
Delta
Deal found 4/19$776
This United Airlines deal was found by Cheapflights users on 4/17. 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 10/611:20 am
ONT
-
OTP
2 stops27h 50m
United Airlines
Wed 10/146:15 am
OTP
-
ONT
2 stops25h 43m
United Airlines
Deal found 4/17$785
This United Airlines deal was found by Cheapflights users on 4/17. 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 10/1811:20 am
ONT
-
OTP
2 stops26h 20m
United Airlines
Sun 11/17:10 pm
OTP
-
ONT
2 stops37h 16m
United Airlines
Deal found 4/17$801
This United Airlines deal was found by Cheapflights users on 4/18. 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 10/307:00 am
ONT
-
OTP
2 stops20h 30m
United Airlines
Tue 11/177:10 pm
OTP
-
ONT
2 stops37h 16m
United Airlines
Deal found 4/18$808
This United Airlines deal was found by Cheapflights users on 4/19. 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 9/121:18 pm
ONT
-
OTP
2 stops17h 12m
United Airlines
Thu 9/246:05 am
OTP
-
ONT
2 stops24h 11m
United Airlines
Deal found 4/19$816

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 April 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$759
(United Airlines)

One-way from

$345
(Iberia)

Popular in

June

Cheapest in

March

Average price

$695
Provider with most accurate pricing for Los Angeles Los Angeles-Bucharest (BUH) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles 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. 15% potential increase in price ($127 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 April 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 April 21, 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

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Mon 8/17

5:45 am-5:25 pm

2 stops25h 40m

Cluj Napoca

Wed 9/9

1:50 pm-6:19 pm

2 stops38h 29m

$759

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 10/18

11:20 am-11:40 pm

2 stops26h 20m

Bucharest Otopeni Intl

Sun 11/1

7:10 pm-10:26 pm

2 stops37h 16m

$801

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Fri 8/7

6:30 am-5:25 pm

2 stops24h 55m

Cluj Napoca

Fri 8/28

6:00 am-10:58 pm

2 stops26h 58m

$947

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 5/7

10:37 am-6:35 pm

2 stops21h 58m

Bucharest Otopeni Intl

Thu 5/14

1:45 pm-10:59 pm

2 stops19h 14m

$954

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Thu 5/7

1:30 pm-5:25 pm

2 stops41h 55m

Cluj Napoca

Mon 5/18

1:50 pm-5:52 pm

3 stops38h 02m

$976

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sat 8/22

12:33 pm-12:20 am

2 stops25h 47m

Bucharest Otopeni Intl

Sat 9/5

8:00 pm-9:51 pm

2 stops35h 51m

$978

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sat 5/9

10:43 am-11:30 pm

2 stops26h 47m

Bucharest Otopeni Intl

Sat 5/23

6:05 am-12:12 pm

2 stops40h 07m

$982

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Mon 5/18

10:37 am-1:10 am

2 stops28h 33m

Bucharest Otopeni Intl

Mon 6/1

1:50 pm-10:37 pm

2 stops42h 47m

$988

OntarioCluj Napoca

ONT - CLJ

ONTCLJ

Ontario

Fri 5/8

10:37 am-5:25 pm

2 stops20h 48m

Cluj Napoca

Sat 6/6

6:00 am-10:46 pm

2 stops26h 46m

$1,033

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 9/17

1:18 pm-4:30 pm

2 stops17h 12m

Bucharest Otopeni Intl

Mon 9/28

6:05 am-8:16 pm

2 stops24h 11m

$1,088

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/18

Showing 1-10 of 35 resultsSorted by cheapest first
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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
No data available for this route at this time. Please check back soon.

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 April 21, 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
9,613 reviews

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

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
9,613 reviews
United Airlines
7.4
Good
9,613 reviews

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

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 25h 40m. Ontario and Romania are separated by a distance of 6351 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.

See more FAQs

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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 April 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$539Average$614FlexibilityNo cancel feeOn-time69%

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