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Ontario

$944+ Cheap flights from Sofia (SOF) to Ontario (ONT)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — ONT
Mar 17 — Mar 241
Tue 3/17
Tue 3/24
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 February 15, 2026.

This United Airlines deal was found by Cheapflights users on 2/12. 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 2/252:25 pm
SOF
-
ONT
2 stops18h 32m
United Airlines
Mon 4/61:27 pm
ONT
-
SOF
2 stops23h 13m
United Airlines
Deal found 2/12$944
This United Airlines deal was found by Cheapflights users on 2/12. 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.
Mon 2/232:20 pm
SOF
-
ONT
2 stops18h 37m
United Airlines
Wed 4/81:34 pm
ONT
-
SOF
2 stops18h 31m
United Airlines
Deal found 2/12$954
This United Airlines deal was found by Cheapflights users on 2/13. 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.
Sun 3/12:00 pm
SOF
-
ONT
2 stops18h 57m
United Airlines
Sun 4/56:05 am
ONT
-
SOF
2 stops30h 55m
United Airlines
Deal found 2/13$955
This United Airlines deal was found by Cheapflights users on 2/13. 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.
Sun 2/226:05 am
SOF
-
ONT
2 stops25h 54m
United Airlines
Sun 4/511:05 am
ONT
-
SOF
2 stops25h 55m
United Airlines
Deal found 2/13$984
This Priceline deal was found by Cheapflights users on 2/12. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/299:25 pm
SOF
-
ONT
2 stops30h 47m
British Airways
Sat 8/228:15 am
ONT
-
SOF
2 stops25h 55m
British Airways
Deal found 2/12$1,035
This CheapOair deal was found by Cheapflights users on 2/14. 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.
Fri 8/79:35 am
SOF
-
ONT
2 stops24h 21m
Multiple Airlines
Sat 8/2211:59 pm
ONT
-
SOF
2 stops34h 16m
Multiple Airlines
Deal found 2/14$1,077
This United Airlines deal was found by Cheapflights users on 2/13. 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 3/301:34 pm
ONT
-
SOF
2 stops19h 06m
United Airlines
Deal found 2/13$1,125
This British Airways deal was found by Cheapflights users on 2/14. 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.
Sun 10/49:05 pm
SOF
-
ONT
2 stops30h 32m
British Airways
Sat 10/102:57 pm
ONT
-
SOF
2 stops19h 13m
British Airways
Deal found 2/14$1,252
This Priceline deal was found by Cheapflights users on 2/12. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:10 am
SOF
-
ONT
2 stops25h 49m
Multiple Airlines
Mon 4/611:58 pm
ONT
-
SOF
2 stops34h 32m
Multiple Airlines
Deal found 2/12$1,548
This British Airways deal was found by Cheapflights users on 2/12. 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 3/165:25 pm
SOF
-
ONT
2 stops34h 17m
British Airways
Mon 3/3011:58 pm
ONT
-
SOF
2 stops34h 32m
British Airways
Deal found 2/12$1,864
This British Airways deal was found by Cheapflights users on 2/13. 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.
Sun 4/129:05 pm
SOF
-
ONT
2 stops31h 32m
British Airways
Fri 4/2411:59 pm
ONT
-
SOF
2 stops34h 11m
British Airways
Deal found 2/13$2,158
This British Airways deal was found by Cheapflights users on 2/14. 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.
Wed 8/129:25 pm
SOF
-
ONT
2 stops30h 52m
British Airways
Sat 9/122:56 pm
ONT
-
SOF
2 stops19h 14m
British Airways
Deal found 2/14$2,239

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 February 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$944
(United Airlines)

Popular in

January

Cheapest in

July

Average price

$860
Provider with most accurate pricing for Sofia-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sofia-Ontario flights.
Search Deals
From Sofia to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($45 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 15, 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 2/25

2:25 pm-10:57 pm

2 stops18h 32m

Ontario

Mon 4/6

1:27 pm-10:40 pm

2 stops23h 13m

$944

SofiaOntario

SOF - ONT

SOFONT

Sofia

Wed 2/25

2:25 pm-10:57 pm

2 stops18h 32m

Ontario

Thu 4/9

1:34 pm-6:25 pm

2 stops18h 51m

$954

SofiaOntario

SOF - ONT

SOFONT

Sofia

Sun 3/1

2:00 pm-10:57 pm

2 stops18h 57m

Ontario

Sun 4/5

6:05 am-11:00 pm

2 stops30h 55m

$955

SofiaOntario

SOF - ONT

SOFONT

Sofia

Wed 7/29

9:25 pm-6:12 pm

2 stops30h 47m

Ontario

Sat 8/22

8:15 am-8:10 pm

2 stops25h 55m

$1,035

SofiaOntario

SOF - ONT

SOFONT

Sofia

Fri 8/7

9:35 am-11:56 pm

2 stops24h 21m

Ontario

Sat 8/22

11:59 pm-8:15 pm

2 stops34h 16m

$1,077

SofiaOntario

SOF - ONT

SOFONT

Sofia

Sat 3/14

6:25 am-5:38 pm

2 stops20h 13m

Ontario

Mon 3/30

1:34 pm-6:40 pm

2 stops19h 06m

$1,125

SofiaOntario

SOF - ONT

SOFONT

Sofia

Wed 2/25

6:10 am-9:59 pm

2 stops25h 49m

Ontario

Mon 4/6

11:58 pm-8:30 pm

2 stops34h 32m

$1,548

SofiaOntario

SOF - ONT

SOFONT

Sofia

Mon 3/16

5:25 pm-6:42 pm

2 stops34h 17m

Ontario

Mon 3/30

11:58 pm-8:30 pm

2 stops34h 32m

$1,864

SofiaOntario

SOF - ONT

SOFONT

Sofia

Sun 4/12

9:05 pm-6:37 pm

2 stops31h 32m

Ontario

Fri 4/24

11:59 pm-8:10 pm

2 stops34h 11m

$2,158

SofiaOntario

SOF - ONT

SOFONT

Sofia

Wed 3/4

9:00 pm-6:42 pm

2 stops31h 42m

Ontario

Thu 4/2

7:00 am-1:25 pm

2 stops20h 25m

$2,284

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/12

Showing 1-10 of 13 results
1
2
  • Most accurate provider: When it comes to deals on Sofia-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sofia-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sofia-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sofia-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sofia-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 $565). 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 $944, United Airlines can have you in Ontario from Sofia in 18h 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 $565). 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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