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$589+ Cheap flights from Sofia (SOF) to Ontario (ONT)

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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — ONT
Feb 9 — Feb 161
Mon 2/9
Mon 2/16
1 adult, Economy
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Cheap flight deals from Sofia to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Sofia (SOF) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 10, 2026.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$826
(British Airways)

One-way from

$589
(Iberia)

Popular in

May

Cheapest in

February

Average price

$939
Provider with most accurate pricing for Sofia-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Sofia-Los Angeles flights.
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From Sofia to Ontario
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One-way flight from Sofia to Ontario
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Highest demand for flights based on searches. 3% potential increase in price ($31 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Sofia to Ontario

Cheapest flights from Sofia to Ontario
Explore the most affordable flight options available from Sofia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 10, 2026.

This British Airways deal was found by Cheapflights users on 1/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/25:25 pmSOF - ONT
2 stops35h 20mBritish Airways
Tue 2/175:02 pmONT - SOF
2 stops17h 08mBritish Airways
Deal found 1/10$888
This United Airlines deal was found by Cheapflights users on 1/9. 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 2/62:35 pmSOF - ONT
2 stops18h 18mUnited Airlines
Thu 2/191:45 pmONT - SOF
2 stops18h 15mUnited Airlines
Deal found 1/9$939
This Turkish Airlines deal was found by Cheapflights users on 1/10. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:05 pmSOF - ONT
2 stops34h 24mTurkish Airlines
Thu 10/1510:56 pmONT - SOF
2 stops23h 49mTurkish Airlines
Deal found 1/10$1,625
This Qatar Airways deal was found by Cheapflights users on 1/10. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/212:30 pmSOF - ONT
2 stops35h 48mQatar Airways
Tue 2/1712:02 pmONT - SOF
2 stops37h 23mQatar Airways
Deal found 1/10$1,912
This British Airways deal was found by Cheapflights users on 1/8. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:10 pmSOF - ONT
2 stops30h 14mBritish Airways
Wed 9/211:59 pmONT - SOF
2 stops27h 31mBritish Airways
Deal found 1/8$1,927
This United Airlines deal was found by Cheapflights users on 1/10. 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 3/46:10 amSOF - ONT
2 stops21h 31mUnited Airlines
Sun 3/86:37 pmONT - SOF
2 stops19h 08mUnited Airlines
Deal found 1/10$3,699

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sofia to Ontario 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 January 10, 2026.
Use the filters below to find and compare flights from Sofia to Ontario that are best for you.

Fly from

Sofia

Fly to

Ontario

Route

Depart

Return

Price

SofiaOntario

SOF - ONT

SOFONT

Sofia

Mon 2/2

5:25 pm-6:45 pm

2 stops35h 20m

Ontario

Tue 2/17

5:02 pm-8:10 pm

2 stops17h 08m

$888

SofiaOntario

SOF - ONT

SOFONT

Sofia

Fri 2/6

2:35 pm-10:53 pm

2 stops18h 18m

Ontario

Thu 2/19

1:45 pm-6:00 pm

2 stops18h 15m

$939

SofiaOntario

SOF - ONT

SOFONT

Sofia

Mon 2/2

12:30 pm-2:18 pm

2 stops35h 48m

Ontario

Tue 2/17

12:02 pm-11:25 am

2 stops37h 23m

$1,912

SofiaOntario

SOF - ONT

SOFONT

Sofia

Wed 3/4

6:10 am-5:41 pm

2 stops21h 31m

Ontario

Sun 3/8

6:37 pm-10:45 pm

2 stops19h 08m

$3,699

SofiaOntario

SOF - ONT

SOFONT

Sofia

Wed 3/4

9:00 pm-11:59 pm

2 stops36h 59m

$589

SofiaOntario

SOF - ONT

SOFONT

Sofia

Sun 3/1

2:30 pm-4:22 pm

2 stops59h 52m

$696

SofiaOntario

SOF - ONT

SOFONT

Sofia

Thu 2/26

6:05 am-9:59 pm

2 stops25h 54m

$932

SofiaOntario

SOF - ONT

SOFONT

Sofia

Fri 2/27

6:05 am-12:47 pm

2 stops40h 42m

$932

SofiaOntario

SOF - ONT

SOFONT

Sofia

Wed 2/25

2:00 pm-10:57 pm

2 stops18h 57m

$932

SofiaOntario

SOF - ONT

SOFONT

Sofia

Wed 1/21

6:05 am-12:47 pm

2 stops40h 42m

$932

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/9

Showing 1-10 of 13 results
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Best time to book a flight from Sofia to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Sofia 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 Sofia to Ontario

What is the cheapest month to book a flight from Sofia to Ontario?

Currently, July is the cheapest month in which you can book a flight from Sofia to Ontario (average of $566). Flying from Sofia to Ontario in August is currently the most expensive (average of $822). 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.

Related info for your journey

Find useful and relevant information for your journey from Sofia to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Sofia to Ontario?

    For as low as $874, British Airways can have you in Ontario from Sofia in 20h 13m. There are 6585 mi between Sofia and Ontario. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from Sofia to Ontario that include hotel bookings?

    Yes. In addition to deals on Sofia to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sofia to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sofia to Ontario.

  • Can I find deals for business class flights from Sofia to Ontario?

    Yes. Cheapflights offers flight deals from Sofia to Ontario 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 Sofia to Ontario?

    Currently, July is the cheapest month in which you can book a flight from Sofia to Ontario (average of $566). Flying from Sofia to Ontario in August is currently the most expensive (average of $822). 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.

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