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Cheap flights from Ontario to Bucharest from $326

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Bucharest departing on 7/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ontario to Bucharest

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
3:19 pm - 10:55 pm
ONT
-
OTP
22h 36m
2 stops
British Airways Logo
6:10 pm - 10:35 pm
OTP
-
ONT
38h 25m
2 stops
$490British Airways
Tue, Mar 24 - Tue, Apr 7
Multiple Airlines Logo
10:59 am - 3:25 pm
ONT
-
OTP
18h 26m
2 stops
Multiple Airlines Logo
8:15 am - 8:54 pm
OTP
-
ONT
22h 39m
2 stops
$541Multiple Airlines
Tue, Apr 28 - Tue, May 12
United Airlines Logo
1:50 pm - 6:35 pm
ONT
-
OTP
42h 45m
2 stops
United Airlines Logo
5:55 am - 10:18 pm
OTP
-
ONT
25h 23m
2 stops
$553United Airlines
Sun, Mar 1 - Sun, Mar 15
United Airlines Logo
5:15 am - 2:10 pm
ONT
-
OTP
23h 55m
2 stops
United Airlines Logo
6:05 am - 10:45 pm
OTP
-
ONT
26h 40m
2 stops
$566United Airlines
Thu, Mar 19 - Thu, Apr 2
Lufthansa Logo
5:15 am - 1:55 pm
ONT
-
OTP
23h 40m
2 stops
Lufthansa Logo
6:05 am - 10:26 pm
OTP
-
ONT
26h 21m
2 stops
$584Lufthansa
Tue, Mar 24 - Sat, Apr 4
Multiple Airlines Logo
10:56 am - 2:55 pm
ONT
-
OTP
17h 59m
2 stops
Multiple Airlines Logo
8:00 am - 10:49 pm
OTP
-
ONT
23h 49m
2 stops
$604Multiple Airlines
Sun, Mar 1 - Tue, Mar 17
British Airways Logo
4:52 pm - 1:20 am
ONT
-
OTP
22h 28m
2 stops
British Airways Logo
8:10 am - 10:35 pm
OTP
-
ONT
24h 25m
2 stops
$611British Airways
Tue, Apr 14 - Sun, Apr 26
United Airlines Logo
5:00 am - 2:00 pm
ONT
-
OTP
23h 00m
2 stops
United Airlines Logo
6:05 am - 8:50 pm
OTP
-
ONT
24h 45m
2 stops
$616United Airlines
Wed, Feb 18 - Wed, Mar 4
United Airlines Logo
1:45 pm - 11:50 pm
ONT
-
OTP
24h 05m
2 stops
United Airlines Logo
2:45 pm - 10:57 pm
OTP
-
ONT
18h 12m
2 stops
$636United Airlines
Thu, Feb 19 - Thu, Mar 5
British Airways Logo
1:10 pm - 1:20 am
ONT
-
OTP
26h 10m
2 stops
British Airways Logo
8:15 am - 10:14 pm
OTP
-
ONT
23h 59m
2 stops
$645British Airways
Tue, Jul 28 - Tue, Aug 11

British Airways flights from Ontario to Bucharest Otopeni Intl Airport

Our best British Airways deals on Ontario to Bucharest Otopeni Intl Airport flight tickets
British Airways
Mar 24
ONT3:19 pmOntario
22h 36m
2 stops
OTP10:55 pmBucharest Otopeni Intl
Apr 7
OTP6:10 pmBucharest Otopeni Intl
38h 25m
2 stops
ONT10:35 pmOntario
$490
British Airways
Apr 14
ONT4:52 pmOntario
22h 28m
2 stops
OTP1:20 amBucharest Otopeni Intl
Apr 26
OTP8:10 amBucharest Otopeni Intl
24h 25m
2 stops
ONT10:35 pmOntario
$611
British Airways
Jul 28
ONT1:10 pmOntario
26h 10m
2 stops
OTP1:20 amBucharest Otopeni Intl
Aug 11
OTP8:15 amBucharest Otopeni Intl
23h 59m
2 stops
ONT10:14 pmOntario
$645

United Airlines flights from Ontario to Bucharest Otopeni Intl Airport

Our best United Airlines deals on Ontario to Bucharest Otopeni Intl Airport flight tickets
United Airlines
Mar 1
ONT1:50 pmOntario
42h 45m
2 stops
OTP6:35 pmBucharest Otopeni Intl
Mar 15
OTP5:55 amBucharest Otopeni Intl
25h 23m
2 stops
ONT10:18 pmOntario
$553
United Airlines
Mar 19
ONT5:15 amOntario
23h 55m
2 stops
OTP2:10 pmBucharest Otopeni Intl
Apr 2
OTP6:05 amBucharest Otopeni Intl
26h 40m
2 stops
ONT10:45 pmOntario
$566
United Airlines
Feb 18
ONT5:00 amOntario
23h 00m
2 stops
OTP2:00 pmBucharest Otopeni Intl
Mar 4
OTP6:05 amBucharest Otopeni Intl
24h 45m
2 stops
ONT8:50 pmOntario
$616

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Bucharest Otopeni Intl Airport 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, momondo users made 832,500 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Ontario to Bucharest Otopeni Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 3/24

3:19 pm-10:55 pm

2 stops22h 36m

Bucharest Otopeni Intl

Tue 4/7

6:10 pm-10:35 pm

2 stops38h 25m

$490

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 4/28

10:59 am-3:25 pm

2 stops18h 26m

Bucharest Otopeni Intl

Tue 5/12

8:15 am-8:54 pm

2 stops22h 39m

$541

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 3/1

1:50 pm-6:35 pm

2 stops42h 45m

Bucharest Otopeni Intl

Sun 3/15

5:55 am-10:18 pm

2 stops25h 23m

$553

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 3/19

5:15 am-2:10 pm

2 stops23h 55m

Bucharest Otopeni Intl

Thu 4/2

6:05 am-10:45 pm

2 stops26h 40m

$566

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 3/24

5:15 am-1:55 pm

2 stops23h 40m

Bucharest Otopeni Intl

Sat 4/4

6:05 am-10:26 pm

2 stops26h 21m

$584

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Sun 3/1

10:56 am-2:55 pm

2 stops17h 59m

Bucharest Otopeni Intl

Tue 3/17

8:00 am-10:49 pm

2 stops23h 49m

$604

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 4/14

4:52 pm-1:20 am

2 stops22h 28m

Bucharest Otopeni Intl

Sun 4/26

8:10 am-10:35 pm

2 stops24h 25m

$611

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Wed 2/18

5:00 am-2:00 pm

2 stops23h 00m

Bucharest Otopeni Intl

Wed 3/4

6:05 am-8:50 pm

2 stops24h 45m

$616

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Thu 2/19

1:45 pm-11:50 pm

2 stops24h 05m

Bucharest Otopeni Intl

Thu 3/5

2:45 pm-10:57 pm

2 stops18h 12m

$636

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

Tue 7/28

1:10 pm-1:20 am

2 stops26h 10m

Bucharest Otopeni Intl

Tue 8/11

8:15 am-10:14 pm

2 stops23h 59m

$645

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Bucharest from

How to get the cheapest flight ticket from Ontario to Bucharest Otopeni Intl Airport

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

What is the cheapest airline that flies from Ontario to Bucharest Otopeni Intl?

American Airlines and United Airlines are the most popular carriers operating from Ontario to Bucharest Otopeni Intl

What airlines fly to Bucharest Otopeni Intl Airport?

Lufthansa, British Airways and Air France are the top three most popular airlines that fly to Bucharest Otopeni Intl Airport from Ontario according to our data. Lufthansa is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Bucharest Otopeni Intl Airport. Keep in mind that there are 11 different airlines that fly to Bucharest Otopeni Intl Airport on a routine basis, so you have a few additional options to choose from.

When to book flights from Ontario to Bucharest Otopeni Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Bucharest Otopeni Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Bucharest Otopeni Intl Airport (ONT to OTP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Bucharest Otopeni Intl Airport

Fastest flight time

18h 26m

Direct flights

None
The fastest flight from Ontario to Bucharest Otopeni Intl Airport takes 18h 26m
There are no direct flights from Ontario to Bucharest Otopeni Intl Airport. There are no popular flight routes from Ontario to Bucharest Otopeni Intl Airport.
Search flight deals

  • How far is Ontario to Bucharest Otopeni Intl by plane?

    Ontario and Bucharest Otopeni Intl are 6542.2 mi apart from one another. By plane, this route typically takes 18h 26m.

  • When did momondo last update prices for flights from Ontario Airport to Bucharest Otopeni Intl Airport?

    Prices for flights from Ontario Airport to Bucharest Otopeni Intl Airport are updated daily.

  • How old do you have to be to fly from Ontario Airport to Bucharest Otopeni Intl Airport?

    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 Bucharest Otopeni Intl Airport.

  • What documentation or ID do you need to fly to Bucharest Otopeni Intl Airport?

    The necessary travel and health documents for your Bucharest Otopeni Intl Airport 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.

Traveling to a place near Bucharest?

Book flights to Bucharest if you plan to visit one of these locations
Otopeni

Why use momondo?

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

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

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

Flights from Ontario to Bucharest with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo helps you find the best flight between Ontario and Bucharest by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Bucharest, momondo offers a useful price alert feature which will track prices for flights to Bucharest from Ontario and alert you when they change.

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