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Ontario

$835+ 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 19 — Feb 261
Thu 2/19
Thu 2/26
1 adult, Economy
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Cheap 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 20, 2026.

This Expedia deal was found by Cheapflights users on 1/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/119:00 pm
SOF
-
ONT
2 stops31h 42m
British Airways
Mon 2/1611:58 pm
ONT
-
SOF
2 stops34h 12m
British Airways
Deal found 1/20$857
This United Airlines deal was found by Cheapflights users on 1/19. 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 3/146:25 am
SOF
-
ONT
2 stops20h 13m
United Airlines
Mon 3/236:37 pm
ONT
-
SOF
2 stops19h 08m
United Airlines
Deal found 1/19$922
This United Airlines deal was found by Cheapflights users on 1/20. 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 pm
SOF
-
ONT
2 stops18h 18m
United Airlines
Thu 2/191:45 pm
ONT
-
SOF
2 stops18h 15m
United Airlines
Deal found 1/20$932
This United Airlines deal was found by Cheapflights users on 1/19. 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.
Tue 2/102:00 pm
SOF
-
ONT
2 stops18h 53m
United Airlines
Mon 2/166:37 pm
ONT
-
SOF
2 stops18h 08m
United Airlines
Deal found 1/19$936
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Thu 2/56:05 am
SOF
-
ONT
2 stops21h 38m
United Airlines
Wed 2/187:55 am
ONT
-
SOF
2 stops19h 55m
United Airlines
Deal found 1/20$945
This United Airlines deal was found by Cheapflights users on 1/19. 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 3/146:25 am
SOF
-
ONT
2 stops20h 13m
United Airlines
Thu 3/266:15 am
ONT
-
SOF
2 stops22h 35m
United Airlines
Deal found 1/19$1,027
This Turkish Airlines deal was found by Cheapflights users on 1/20. 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.
Tue 4/289:35 am
SOF
-
ONT
2 stops22h 57m
Multiple Airlines
Wed 5/610:39 am
ONT
-
SOF
2 stops23h 36m
Multiple Airlines
Deal found 1/20$1,126
This CheapOair deal was found by Cheapflights users on 1/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/209:40 pm
SOF
-
ONT
2 stops47h 19m
Multiple Airlines
Sat 1/2411:53 am
ONT
-
SOF
2 stops22h 57m
Multiple Airlines
Deal found 1/20$2,094
This British Airways deal was found by Cheapflights users on 1/20. 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 2/165:25 pm
SOF
-
ONT
2 stops35h 17m
British Airways
Mon 3/211:58 pm
ONT
-
SOF
2 stops34h 12m
British Airways
Deal found 1/20$3,116
This British Airways deal was found by Cheapflights users on 1/20. 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.
Sat 2/1412:05 pm
SOF
-
ONT
2 stops40h 37m
British Airways
Mon 3/211:58 pm
ONT
-
SOF
2 stops34h 12m
British Airways
Deal found 1/20$3,125

Find 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 20, 2026.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$857
(Expedia)

One-way from

$835
(Iberia)

Popular in

May

Cheapest in

October

Average price

$939
Provider with most accurate pricing for Sofia-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sofia-Los Angeles flights.
Search Deals
From Sofia to Ontario
Search Deals
One-way flight from Sofia to Ontario
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($25 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 20, 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

Wed 2/11

9:00 pm-6:42 pm

2 stops31h 42m

Ontario

Mon 2/16

11:58 pm-8:10 pm

2 stops34h 12m

$857

SofiaOntario

SOF - ONT

SOFONT

Sofia

Sat 3/14

6:25 am-10:57 pm

2 stops25h 32m

Ontario

Wed 3/25

6:37 pm-10:45 pm

2 stops19h 08m

$922

SofiaOntario

SOF - ONT

SOFONT

Sofia

Sat 3/14

6:25 am-5:38 pm

2 stops20h 13m

Ontario

Mon 3/23

6:37 pm-10:45 pm

2 stops19h 08m

$922

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

$932

SofiaOntario

SOF - ONT

SOFONT

Sofia

Tue 2/10

2:00 pm-10:53 pm

2 stops18h 53m

Ontario

Mon 2/16

6:37 pm-10:45 pm

2 stops18h 08m

$936

SofiaOntario

SOF - ONT

SOFONT

Sofia

Thu 2/5

6:05 am-5:43 pm

2 stops21h 38m

Ontario

Wed 2/18

7:55 am-1:50 pm

2 stops19h 55m

$945

SofiaOntario

SOF - ONT

SOFONT

Sofia

Sat 3/14

6:25 am-5:38 pm

2 stops20h 13m

Ontario

Thu 3/26

6:15 am-1:50 pm

2 stops22h 35m

$1,027

SofiaOntario

SOF - ONT

SOFONT

Sofia

Tue 4/28

9:35 am-10:32 pm

2 stops22h 57m

Ontario

Wed 5/6

10:39 am-8:15 pm

2 stops23h 36m

$1,126

SofiaOntario

SOF - ONT

SOFONT

Sofia

Wed 2/18

9:00 pm-10:29 pm

2 stops35h 29m

Ontario

Thu 3/5

7:00 am-11:15 am

2 stops42h 15m

$3,125

SofiaOntario

SOF - ONT

SOFONT

Sofia

Sun 2/15

2:30 pm-6:42 pm

2 stops38h 12m

Ontario

Sat 2/28

11:58 pm-4:20 pm

2 stops30h 22m

$3,125

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 16 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 $922, British Airways can have you in Ontario from Sofia in 25h 32m. 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.

See more FAQs

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