HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$897+ 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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — ONT
Dec 14 — Dec 211
Sun 12/14
Sun 12/21
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Sofia to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 November 14, 2025.

This United Airlines deal was found by Cheapflights users on 11/12. 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.
Thu 12/116:00 amSOF - ONT
2 stops24h 42mUnited Airlines
Wed 4/151:34 pmONT - SOF
2 stops18h 26mUnited Airlines
Deal found 11/12$897
This United Airlines deal was found by Cheapflights users on 11/12. 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.
Sat 12/132:00 pmSOF - ONT
2 stops18h 49mUnited Airlines
Wed 4/151:34 pmONT - SOF
2 stops18h 26mUnited Airlines
Deal found 11/12$939
This United Airlines deal was found by Cheapflights users on 11/12. 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 12/172:00 pmSOF - ONT
2 stops18h 49mUnited Airlines
Sun 1/45:05 amONT - SOF
2 stops22h 30mUnited Airlines
Deal found 11/12$1,170
This United Airlines deal was found by Cheapflights users on 11/12. 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.
Fri 11/146:10 amSOF - ONT
3 stops26h 41mUnited Airlines
Tue 11/185:05 amONT - SOF
2 stops31h 40mUnited Airlines
Deal found 11/12$1,274
This United Airlines deal was found by Cheapflights users on 11/13. 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 11/292:25 pmSOF - ONT
2 stops18h 26mUnited Airlines
Wed 12/31:34 pmONT - SOF
2 stops18h 46mUnited Airlines
Deal found 11/13$2,034
This Qatar Airways deal was found by Cheapflights users on 11/14. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1312:30 pmSOF - ONT
2 stops35h 29mQatar Airways
Fri 12/267:19 pmONT - SOF
2 stops54h 06mQatar Airways
Deal found 11/14$2,349

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 November 14, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$897
(United Airlines)

Popular in

January

Cheapest in

March

Average price

$836
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
Highest demand for flights based on searches. 3% potential increase in price ($31 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 14, 2025.
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 12/10

6:10 am-8:42 pm

2 stops24h 32m

Ontario

Wed 4/15

1:34 pm-6:00 pm

2 stops18h 26m

$897

SofiaOntario

SOF - ONT

SOFONT

Sofia

Thu 12/11

6:00 am-8:42 pm

2 stops24h 42m

Ontario

Tue 4/14

1:34 pm-6:00 pm

2 stops18h 26m

$897

SofiaOntario

SOF - ONT

SOFONT

Sofia

Thu 12/11

6:00 am-8:42 pm

2 stops24h 42m

Ontario

Thu 4/16

1:34 pm-6:00 pm

2 stops18h 26m

$897

SofiaOntario

SOF - ONT

SOFONT

Sofia

Thu 12/11

6:00 am-8:42 pm

2 stops24h 42m

Ontario

Wed 4/15

1:34 pm-6:00 pm

2 stops18h 26m

$897

SofiaOntario

SOF - ONT

SOFONT

Sofia

Thu 12/11

6:00 am-5:37 pm

2 stops21h 37m

Ontario

Sun 4/12

7:00 am-1:15 pm

2 stops20h 15m

$897

SofiaOntario

SOF - ONT

SOFONT

Sofia

Wed 12/10

6:10 am-8:42 pm

2 stops24h 32m

Ontario

Tue 4/14

1:34 pm-6:00 pm

2 stops18h 26m

$897

SofiaOntario

SOF - ONT

SOFONT

Sofia

Wed 12/10

6:10 am-8:42 pm

2 stops24h 32m

Ontario

Thu 4/16

1:34 pm-6:00 pm

2 stops18h 26m

$897

SofiaOntario

SOF - ONT

SOFONT

Sofia

Sat 12/13

2:00 pm-10:49 pm

2 stops18h 49m

Ontario

Wed 4/15

1:34 pm-6:00 pm

2 stops18h 26m

$939

SofiaOntario

SOF - ONT

SOFONT

Sofia

Sat 2/14

12:05 pm-10:51 pm

2 stops20h 46m

Ontario

Sat 2/28

6:10 am-1:00 pm

2 stops20h 50m

$1,135

SofiaOntario

SOF - ONT

SOFONT

Sofia

Wed 12/17

2:00 pm-10:49 pm

2 stops18h 49m

Ontario

Sun 1/4

5:05 am-1:35 pm

2 stops22h 30m

$1,170

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 11 results
1
2

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 $568). Flying from Sofia to Ontario in April is currently the most expensive (average of $829). 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 $897, United Airlines can have you in Ontario from Sofia in 24h 32m. There are 6585 mi between Sofia and Ontario.

  • 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 $568). Flying from Sofia to Ontario in April is currently the most expensive (average of $829). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Sofia to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Sofia to Los Angeles flights
Sofia to Santa Ana flights
Sofia to San Francisco flights
Sofia to Las Vegas flights
Sofia to San Jose flights
Sofia to Burbank flights
Sofia to Oakland flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.