What airlines fly to Romania?

Lufthansa, Turkish Airlines and United Airlines are the top three most popular airlines that fly to Romania from Ontario according to our data. Lufthansa is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Romania. Keep in mind that there are 10 different airlines that fly to Romania on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Ontario to Romania?

United Airlines is the most popular carrier operating from Ontario to Romania

When did momondo last update prices for flights from Ontario Airport to Romania?

Prices for flights from Ontario Airport to Romania refresh daily.

How many operators does momondo search for flights from Ontario Airport to Romania?

The number of operators available for flights from Ontario Airport to Romania is 1 as of October 2026.

How old do you have to be to fly from Ontario Airport to Romania?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Romania.

What documentation or ID do you need to fly to Romania?

The necessary travel and health documents for your Romania trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$362 Cheap Flights from Ontario to Romania in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Romania

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:00 am - 1:55 pmONT Ontario-OTP Bucharest Otopeni Intl

22h 55m2 stops Denver Intl Frankfurt am Main

6:00 am - 8:38 pmOTP Bucharest Otopeni Intl-ONT Ontario

24h 38m2 stops Frankfurt am Main San Francisco

$730United Airlines

Wed, Dec 9 - Wed, Dec 16

4:17 pm - 11:55 pmONT Ontario-OTP Bucharest Otopeni Intl

21h 38m2 stops San Francisco Frankfurt am Main

6:00 am - 8:38 pmOTP Bucharest Otopeni Intl-ONT Ontario

24h 38m2 stops Frankfurt am Main San Francisco

$730United Airlines

Wed, Nov 25 - Wed, Dec 9

4:17 pm - 11:55 pmONT Ontario-OTP Bucharest Otopeni Intl

21h 38m2 stops San Francisco Frankfurt am Main

6:00 am - 8:01 pmOTP Bucharest Otopeni Intl-ONT Ontario

24h 01m2 stops Frankfurt am Main San Francisco

$731United Airlines

Tue, Dec 8 - Tue, Jan 12

4:19 pm - 12:05 amONT Ontario-OTP Bucharest Otopeni Intl

21h 46m2 stops Phoenix Sky Harbor Intl London Heathrow

8:20 am - 11:13 pmOTP Bucharest Otopeni Intl-ONT Ontario

24h 53m2 stops London Heathrow Dallas/Fort Worth

$734British Airways

Tue, Jan 19 - Tue, Feb 2

6:00 am - 1:55 pmONT Ontario-OTP Bucharest Otopeni Intl

21h 55m2 stops Houston George Bush Intcntl Frankfurt am Main

6:00 am - 6:50 pmOTP Bucharest Otopeni Intl-ONT Ontario

22h 50m2 stops Frankfurt am Main Chicago O'Hare Intl

$736United Airlines

Wed, Jan 27 - Wed, Feb 10

5:00 am - 1:55 pmONT Ontario-OTP Bucharest Otopeni Intl

22h 55m2 stops Denver Intl Frankfurt am Main

6:00 am - 8:01 pmOTP Bucharest Otopeni Intl-ONT Ontario

24h 01m2 stops Frankfurt am Main San Francisco

$736United Airlines

Tue, Jan 19 - Tue, Feb 2

5:00 am - 1:55 pmONT Ontario-OTP Bucharest Otopeni Intl

22h 55m2 stops Denver Intl Frankfurt am Main

6:00 am - 8:01 pmOTP Bucharest Otopeni Intl-ONT Ontario

24h 01m2 stops Frankfurt am Main San Francisco

$736United Airlines

Tue, Jan 12 - Tue, Jan 19

4:15 pm - 11:55 pmONT Ontario-OTP Bucharest Otopeni Intl

21h 40m2 stops San Francisco Frankfurt am Main

6:00 am - 8:32 pmOTP Bucharest Otopeni Intl-ONT Ontario

24h 32m2 stops Frankfurt am Main Denver Intl

$736United Airlines

Tue, Feb 23 - Tue, Mar 9

7:00 am - 1:55 pmONT Ontario-OTP Bucharest Otopeni Intl

20h 55m2 stops Chicago O'Hare Intl Frankfurt am Main

6:00 am - 9:17 pmOTP Bucharest Otopeni Intl-ONT Ontario

25h 17m2 stops Frankfurt am Main Denver Intl

$736United Airlines

Tue, Feb 16 - Tue, Mar 2

10:34 am - 3:05 pmONT Ontario-OTP Bucharest Otopeni Intl

19h 31m2 stops Dallas/Fort Worth London Heathrow

8:15 am - 10:35 pmOTP Bucharest Otopeni Intl-ONT Ontario

24h 20m2 stops London Heathrow Dallas/Fort Worth

$745Multiple Airlines

Tue, Mar 23 - Tue, Apr 6

Cheap last minute flights

Enter your travel dates to find the best prices.

6:00 am - 11:55 pmONT Ontario-OTP Bucharest Otopeni Intl

31h 55m2 stops San Francisco Frankfurt am Main

5:55 am - 6:47 pmOTP Bucharest Otopeni Intl-ONT Ontario

22h 52m2 stops Frankfurt am Main Chicago O'Hare Intl

$880United Airlines

Sun, Nov 1 - Sat, Nov 14

6:00 am - 11:55 pmONT Ontario-OTP Bucharest Otopeni Intl

31h 55m2 stops San Francisco Frankfurt am Main

5:55 am - 8:15 pmOTP Bucharest Otopeni Intl-ONT Ontario

24h 20m2 stops Frankfurt am Main San Francisco

$880United Airlines

Sun, Nov 1 - Sat, Nov 14

5:00 am - 11:55 pmONT Ontario-OTP Bucharest Otopeni Intl

32h 55m2 stops Denver Intl Frankfurt am Main

5:55 am - 9:40 pmOTP Bucharest Otopeni Intl-ONT Ontario

25h 45m2 stops Frankfurt am Main Houston George Bush Intcntl

$890United Airlines

Sun, Nov 1 - Sat, Nov 14

8:03 pm - 3:05 pmONT Ontario-OTP Bucharest Otopeni Intl

34h 02m3 stops Dallas/Fort Worth Chicago O'Hare Intl Belgrade Nikola Tesla

10:55 pm - 7:30 pmOTP Bucharest Otopeni Intl-ONT Ontario

30h 35m3 stops Milan Malpensa Lisbon Humberto Delgado San Francisco

$1,178Multiple Airlines

Fri, Oct 30 - Sun, Nov 1

11:15 am - 8:15 pmONT Ontario-OTP Bucharest Otopeni Intl

23h 00m3 stops Las Vegas Harry Reid Intl Denver Intl Istanbul

9:35 pm - 11:06 pmOTP Bucharest Otopeni Intl-ONT Ontario

35h 31m2 stops Istanbul Seattle/Tacoma Intl

$1,613Multiple Airlines

Sun, Nov 1 - Sat, Nov 14

11:15 am - 8:15 pmONT Ontario-OTP Bucharest Otopeni Intl

23h 00m3 stops Las Vegas Harry Reid Intl Denver Intl Istanbul

9:35 pm - 11:06 pmOTP Bucharest Otopeni Intl-ONT Ontario

35h 31m2 stops Istanbul Seattle/Tacoma Intl

$2,003Multiple Airlines

Sun, Nov 1 - Sat, Nov 14

11:15 am - 8:15 pmONT Ontario-OTP Bucharest Otopeni Intl

23h 00m3 stops Las Vegas Harry Reid Intl Denver Intl Istanbul

9:35 pm - 11:06 pmOTP Bucharest Otopeni Intl-ONT Ontario

35h 31m2 stops Istanbul Seattle/Tacoma Intl

$2,033Multiple Airlines

Sun, Nov 1 - Sat, Nov 14

11:15 am - 8:15 pmONT Ontario-OTP Bucharest Otopeni Intl

23h 00m3 stops Las Vegas Harry Reid Intl Denver Intl Istanbul

10:00 am - 3:13 pmOTP Bucharest Otopeni Intl-ONT Ontario

39h 13m2 stops Istanbul Seattle/Tacoma Intl

$2,041Multiple Airlines

Sun, Nov 1 - Sat, Nov 14

11:52 am - 8:15 pmONT Ontario-OTP Bucharest Otopeni Intl

23h 23m2 stops Denver Intl Istanbul

8:35 am - 12:51 amOTP Bucharest Otopeni Intl-ONT Ontario

25h 16m2 stops Istanbul Denver Intl

$2,391Multiple Airlines

Fri, Oct 30 - Sun, Nov 1

12:16 pm - 5:10 pmONT Ontario-OTP Bucharest Otopeni Intl

19h 54m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

6:00 am - 5:12 pmOTP Bucharest Otopeni Intl-ONT Ontario

21h 12m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$11,021KLM

Fri, Oct 30 - Sat, Nov 7

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

United Airlines flights from Ontario to Romania

Our best United Airlines deals on Ontario to Romania flight tickets

United Airlines

Nov 25

ONT4:17 pmOntario

21h 38m

2 stops

OTP11:55 pmBucharest Otopeni Intl

Dec 9

OTP6:00 amBucharest Otopeni Intl

24h 38m

2 stops

ONT8:38 pmOntario

$730

United Airlines

Dec 8

ONT4:17 pmOntario

21h 38m

2 stops

OTP11:55 pmBucharest Otopeni Intl

Jan 12

OTP6:00 amBucharest Otopeni Intl

24h 01m

2 stops

ONT8:01 pmOntario

$731

United Airlines

Feb 16

ONT5:00 amOntario

22h 55m

2 stops

OTP1:55 pmBucharest Otopeni Intl

Mar 2

OTP2:40 pmBucharest Otopeni Intl

18h 21m

2 stops

ONT11:01 pmOntario

$736

British Airways flights from Ontario to Romania

Our best British Airways deals on Ontario to Romania flight tickets

British Airways

Jan 19

ONT4:19 pmOntario

21h 46m

2 stops

OTP12:05 amBucharest Otopeni Intl

Feb 2

OTP8:20 amBucharest Otopeni Intl

24h 53m

2 stops

ONT11:13 pmOntario

$734

British Airways

Apr 25

ONT12:24 pmOntario

26h 26m

2 stops

OTP12:50 amBucharest Otopeni Intl

May 5

OTP8:15 amBucharest Otopeni Intl

23h 44m

2 stops

ONT9:59 pmOntario

$754

British Airways

Nov 14

ONT4:51 pmOntario

21h 14m

2 stops

OTP12:05 amBucharest Otopeni Intl

Nov 22

OTP7:20 amBucharest Otopeni Intl

21h 32m

2 stops

ONT6:52 pmOntario

$934

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBucharest

ONT Ontario - OTP Bucharest Otopeni Intl

ONTOTP

Ontario

Wed 12/9

5:00 am-1:55 pm

2 stops22h 55m

Bucharest Otopeni Intl

Wed 12/16

6:00 am-8:38 pm

2 stops24h 38m

$730

OntarioBucharest

ONT Ontario - OTP Bucharest Otopeni Intl

ONTOTP

Ontario

Wed 11/25

4:17 pm-11:55 pm

2 stops21h 38m

Bucharest Otopeni Intl

Wed 12/9

6:00 am-8:38 pm

2 stops24h 38m

$730

OntarioBucharest

ONT Ontario - OTP Bucharest Otopeni Intl

ONTOTP

Ontario

Tue 12/8

4:17 pm-11:55 pm

2 stops21h 38m

Bucharest Otopeni Intl

Tue 1/12

6:00 am-8:01 pm

2 stops24h 01m

$731

OntarioBucharest

ONT Ontario - OTP Bucharest Otopeni Intl

ONTOTP

Ontario

Tue 1/19

4:19 pm-12:05 am

2 stops21h 46m

Bucharest Otopeni Intl

Tue 2/2

8:20 am-11:13 pm

2 stops24h 53m

$734

OntarioBucharest

ONT Ontario - OTP Bucharest Otopeni Intl

ONTOTP

Ontario

Wed 1/27

6:00 am-1:55 pm

2 stops21h 55m

Bucharest Otopeni Intl

Wed 2/10

6:00 am-6:50 pm

2 stops22h 50m

$736

OntarioBucharest

ONT Ontario - OTP Bucharest Otopeni Intl

ONTOTP

Ontario

Tue 1/19

5:00 am-1:55 pm

2 stops22h 55m

Bucharest Otopeni Intl

Tue 2/2

6:00 am-8:01 pm

2 stops24h 01m

$736

OntarioBucharest

ONT Ontario - OTP Bucharest Otopeni Intl

ONTOTP

Ontario

Tue 1/12

5:00 am-1:55 pm

2 stops22h 55m

Bucharest Otopeni Intl

Tue 1/19

6:00 am-8:01 pm

2 stops24h 01m

$736

OntarioBucharest

ONT Ontario - OTP Bucharest Otopeni Intl

ONTOTP

Ontario

Tue 2/23

4:15 pm-11:55 pm

2 stops21h 40m

Bucharest Otopeni Intl

Tue 3/9

6:00 am-8:32 pm

2 stops24h 32m

$736

OntarioBucharest

ONT Ontario - OTP Bucharest Otopeni Intl

ONTOTP

Ontario

Tue 2/16

7:00 am-1:55 pm

2 stops20h 55m

Bucharest Otopeni Intl

Tue 3/2

6:00 am-9:17 pm

2 stops25h 17m

$736

Quickest round-trip

OntarioBucharest

ONT Ontario - OTP Bucharest Otopeni Intl

ONTOTP

Ontario

Tue 3/23

10:34 am-3:05 pm

2 stops19h 31m

Bucharest Otopeni Intl

Tue 4/6

8:15 am-10:35 pm

2 stops24h 20m

$745

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Romania

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Romania?

The cheapest month to fly to Romania from Ontario is in February. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you are unable to visit Romania during the month of February, then departing from Ontario during the month January is also very affordable. Most momondo users find prices during this month for around $0.

Cheap Ontario to Romania flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Romania

Best Price Found	$362
Fastest flight time	20h 55m
Direct flights	None

The best one-way flight to Romania from Ontario in the past 72 hours is $362. The best round-trip flight deal from Ontario to Romania found on momondo in the last 72 hours is $730.

The fastest flight from Ontario to Romania takes 20h 55m

There are no direct flights from Ontario to Romania. There are no popular flight routes from Ontario to Romania.

Search flight deals

Frequently asked questions about flying from Ontario to Romania

When did momondo last update prices for flights from Ontario Airport to Romania?
Prices for flights from Ontario Airport to Romania refresh daily.
How many operators does momondo search for flights from Ontario Airport to Romania?
The number of operators available for flights from Ontario Airport to Romania is 1 as of October 2026.
How old do you have to be to fly from Ontario Airport to Romania?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Romania.
What documentation or ID do you need to fly to Romania?
The necessary travel and health documents for your Romania trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Ontario to Romania

Compare and see reviews for airlines that fly from Ontario to Romania with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $539	Free Cancellation	Rating 7.3 10,440 reviews		Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Romania?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Romania. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to Romania with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ontario to Romania flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to Romania?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Romania from Ontario.

I’m not ready to book a flight from Ontario to Romania right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Ontario to Romania now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Romania and let you know when they change.