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Cheap flights from Ontario to Bucharest from $461

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 12/11. 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.
United Airlines Logo
1:29 pm - 6:35 pmONT-OTP
19h 06m2 stops
United Airlines Logo
2:50 pm - 10:51 pmOTP-ONT
18h 01m2 stops
$498United Airlines
Find Deal
lun., nov. 10 - vie., nov. 21
British Airways Logo
4:49 pm - 8:00 pmONT-OTP
17h 11m2 stops
British Airways Logo
8:05 am - 9:40 pmOTP-ONT
23h 35m2 stops
$504British Airways
Find Deal
mié., feb. 11 - mié., feb. 25
Delta Logo
6:00 am - 5:10 pmONT-OTP
25h 10m2 stops
Delta Logo
6:00 am - 11:58 pmOTP-ONT
27h 58m2 stops
$505Delta
Find Deal
mié., nov. 26 - mié., dic. 3
United Airlines Logo
6:05 am - 6:40 pmONT-OTP
26h 35m2 stops
United Airlines Logo
6:05 am - 10:49 pmOTP-ONT
26h 44m3 stops
$511United Airlines
Find Deal
mié., nov. 26 - mié., dic. 3
Multiple Airlines Logo
1:29 pm - 6:40 pmONT-OTP
19h 11m3 stops
Multiple Airlines Logo
6:05 am - 5:37 pmOTP-ONT
21h 32m3 stops
$638Multiple Airlines
Find Deal
mié., nov. 26 - mié., dic. 3
Multiple Airlines Logo
12:16 pm - 3:50 pmONT-OTP
17h 34m2 stops
Multiple Airlines Logo
6:00 am - 4:09 pmOTP-ONT
20h 09m2 stops
$640Multiple Airlines
Find Deal
mar., nov. 11 - lun., nov. 24
American Airlines Logo
7:00 am - 2:45 pmONT-OTP
21h 45m2 stops
American Airlines Logo
8:00 am - 9:11 pmOTP-ONT
23h 11m2 stops
$714American Airlines
Find Deal
mar., nov. 11 - jue., nov. 20
American Airlines Logo
3:09 pm - 11:25 pmONT-OTP
23h 16m2 stops
American Airlines Logo
8:25 am - 11:43 pmOTP-ONT
49h 18m2 stops
$821American Airlines
Find Deal
vie., mar. 27 - mar., mar. 31
Delta Logo
1:20 pm - 10:50 pmONT-OTP
47h 30m2 stops
Delta Logo
1:55 pm - 4:09 pmOTP-ONT
36h 14m2 stops
$887Delta
Find Deal
vie., nov. 21 - lun., dic. 8
KLM Logo
1:00 pm - 3:25 pmONT-OTP
17h 25m2 stops
KLM Logo
6:00 am - 4:19 pmOTP-ONT
19h 19m2 stops
$1,045KLM
Find Deal
mié., mar. 11 - mié., mar. 25

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
Nov 10
ONT1:29 pmOntario
19h 06m
2 stops
OTP6:35 pmBucharest Otopeni Intl
Nov 20
OTP5:50 amBucharest Otopeni Intl
26h 41m
2 stops
ONT10:31 pmOntario
$498
Find similar
United Airlines
Nov 26
ONT6:05 amOntario
26h 35m
2 stops
OTP6:40 pmBucharest Otopeni Intl
Dec 3
OTP6:05 amBucharest Otopeni Intl
26h 44m
3 stops
ONT10:49 pmOntario
$511
Find similar
United Airlines
Jan 13
ONT5:05 amOntario
21h 25m
3 stops
OTP12:30 pmBucharest Otopeni Intl
Jan 27
OTP5:55 amBucharest Otopeni Intl
25h 03m
2 stops
ONT8:58 pmOntario
$520
Find similar

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
Feb 11
ONT4:49 pmOntario
17h 11m
2 stops
OTP8:00 pmBucharest Otopeni Intl
Feb 25
OTP8:05 amBucharest Otopeni Intl
23h 35m
2 stops
ONT9:40 pmOntario
$504
Find similar
British Airways
Feb 9
ONT3:09 pmOntario
21h 51m
2 stops
OTP11:00 pmBucharest Otopeni Intl
Feb 23
OTP8:05 amBucharest Otopeni Intl
23h 35m
2 stops
ONT9:40 pmOntario
$1,003
Find similar
British Airways
Dec 1
ONT10:47 amOntario
18h 43m
2 stops
OTP3:30 pmBucharest Otopeni Intl
Dec 15
OTP8:05 amBucharest Otopeni Intl
21h 58m
2 stops
ONT8:03 pmOntario
$1,326
Find similar

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 octubre 14, 2025.
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

lun. 11/10

1:29 pm-6:35 pm

2 stops19h 06m

Bucharest Otopeni Intl

vie. 11/21

2:50 pm-10:51 pm

2 stops18h 01m

$498

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

mié. 2/11

4:49 pm-8:00 pm

2 stops17h 11m

Bucharest Otopeni Intl

mié. 2/25

8:05 am-9:40 pm

2 stops23h 35m

$504

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

mié. 11/26

6:00 am-5:10 pm

2 stops25h 10m

Bucharest Otopeni Intl

mié. 12/3

6:00 am-11:58 pm

2 stops27h 58m

$505

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

mié. 11/26

6:05 am-6:40 pm

2 stops26h 35m

Bucharest Otopeni Intl

mié. 12/3

6:05 am-10:49 pm

3 stops26h 44m

$511

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

mié. 11/26

1:29 pm-6:40 pm

3 stops19h 11m

Bucharest Otopeni Intl

mié. 12/3

6:05 am-5:37 pm

3 stops21h 32m

$638

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

mar. 11/11

12:16 pm-3:50 pm

2 stops17h 34m

Bucharest Otopeni Intl

lun. 11/24

6:00 am-4:09 pm

2 stops20h 09m

$640

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

mar. 11/11

7:00 am-2:45 pm

2 stops21h 45m

Bucharest Otopeni Intl

jue. 11/20

8:00 am-9:11 pm

2 stops23h 11m

$714

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

vie. 3/27

3:09 pm-11:25 pm

2 stops23h 16m

Bucharest Otopeni Intl

mar. 3/31

8:25 am-11:43 pm

2 stops49h 18m

$821

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

vie. 11/21

1:20 pm-10:50 pm

2 stops47h 30m

Bucharest Otopeni Intl

lun. 12/8

1:55 pm-4:09 pm

2 stops36h 14m

$887

OntarioBucharest

ONT - OTP

ONTOTP

Ontario

mié. 3/11

1:00 pm-3:25 pm

2 stops17h 25m

Bucharest Otopeni Intl

mié. 3/25

6:00 am-4:19 pm

2 stops19h 19m

$1,045

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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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 day to depart on your flight to Bucharest Otopeni Intl Airport?

Our data shows that Wednesday is the least expensive day to fly to Bucharest Otopeni Intl Airport. Tickets to fly out on this day can be as low as $704. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Bucharest Otopeni Intl Airport for around $824.

What is the cheapest time of day to depart on your flight to Bucharest Otopeni Intl Airport?

Our most recent data shows that the best time of day to fly to Bucharest Otopeni Intl Airport is in the morning. Flights from Ontario to Bucharest Otopeni Intl Airport during this time can be as low as $715. In the afternoon is when there is more demand to fly to Bucharest Otopeni Intl Airport, so prices are often more expensive at around $792 per ticket.

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

Direct flights

None
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.
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  • 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 17h 10m.

  • 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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