Which airports can I use when flying from Sofia to Ontario?

Flights from Sofia to Ontario usually depart from Sofia (SOF) and arrive at Ontario (ONT).

What popular places can I visit in Ontario?

Some of the most popular sights in Ontario are Ontario Convention Center, Ontario Mills and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

Do I need a passport to fly from Sofia to Ontario?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Have flight prices from Sofia to Ontario changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,043 to $3,677. That means the highest observed fare was about 4x higher than the lowest one.

What is the time difference between Sofia and Ontario?

Ontario is 10 hours behind Sofia (Pacific Time vs Eastern European Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Ontario Airport (ONT)?

Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include: · Fox · Thrifty · Europcar · Dollar · Alamo

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Flight Deals

Cheap Flights from Sofia to Ontario (SOF-ONT)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent round-trip flight deals from Sofia to Ontario

Tue, Dec 8 - Wed, Feb 24

6:25 am - 8:29 pmSOF Sofia-ONT Ontario

24h 04m2 stops Frankfurt am Main San Francisco

6:53 pm - 10:55 pmONT Ontario-SOF Sofia

18h 02m2 stops San Francisco Munich Franz Josef Strauss

$1,043United Airlines

Tue, Dec 8 - Wed, Feb 24

6:25 am - 8:20 pmSOF Sofia-ONT Ontario

23h 55m3 stops Frankfurt am Main Newark Denver Intl

6:53 pm - 10:55 pmONT Ontario-SOF Sofia

18h 02m2 stops San Francisco Munich Franz Josef Strauss

$1,043United Airlines

Tue, Dec 8 - Wed, Feb 24

6:25 am - 8:20 pmSOF Sofia-ONT Ontario

23h 55m3 stops Frankfurt am Main Newark Denver Intl

6:53 pm - 10:55 pmONT Ontario-SOF Sofia

18h 02m2 stops San Francisco Munich Franz Josef Strauss

$1,044United Airlines

Tue, Dec 8 - Wed, Feb 24

6:25 am - 8:29 pmSOF Sofia-ONT Ontario

24h 04m2 stops Frankfurt am Main San Francisco

6:53 pm - 10:55 pmONT Ontario-SOF Sofia

18h 02m2 stops San Francisco Munich Franz Josef Strauss

$1,044United Airlines

Wed, Dec 2 - Tue, Mar 2

9:05 pm - 6:47 pmSOF Sofia-ONT Ontario

31h 42m2 stops London Heathrow Dallas/Fort Worth

2:22 pm - 8:10 pmONT Ontario-SOF Sofia

19h 48m2 stops Dallas/Fort Worth London Heathrow

$1,113British Airways

Mon, Oct 26 - Tue, Nov 10

5:15 pm - 6:44 pmSOF Sofia-ONT Ontario

34h 29m2 stops London Heathrow Dallas/Fort Worth

2:22 pm - 8:10 pmONT Ontario-SOF Sofia

19h 48m2 stops Dallas/Fort Worth London Heathrow

$1,159British Airways

Mon, Oct 26 - Tue, Nov 10

5:15 pm - 6:44 pmSOF Sofia-ONT Ontario

34h 29m2 stops London Heathrow Dallas/Fort Worth

2:22 pm - 8:10 pmONT Ontario-SOF Sofia

19h 48m2 stops Dallas/Fort Worth London Heathrow

$1,161British Airways

Wed, Oct 28 - Wed, Nov 18

9:40 am - 9:45 pmSOF Sofia-ONT Ontario

21h 05m2 stops Istanbul Denver Intl

1:55 pm - 8:55 pmONT Ontario-SOF Sofia

21h 00m2 stops Denver Intl Istanbul

$1,163Multiple Airlines

Mon, Oct 26 - Tue, Nov 10

5:15 pm - 6:44 pmSOF Sofia-ONT Ontario

34h 29m2 stops London Heathrow Dallas/Fort Worth

2:22 pm - 8:10 pmONT Ontario-SOF Sofia

19h 48m2 stops Dallas/Fort Worth London Heathrow

$1,166British Airways

Thu, Oct 22 - Fri, Nov 6

9:35 am - 11:42 pmSOF Sofia-ONT Ontario

24h 07m2 stops Istanbul Seattle/Tacoma Intl

1:20 pm - 8:55 pmONT Ontario-SOF Sofia

21h 35m2 stops Denver Intl Istanbul

$1,225Multiple Airlines

Booking Insights

Price, demand and travel trends for Sofia to Ontario flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Sofia to Ontario with more confidence.

What is the cheapest airline to fly from Sofia to Ontario?

United Airlines ($1,043) and British Airways ($1,113) are the cheapest airlines to fly round-trip from Sofia to Ontario according to KAYAK data over the last 5 days.

Find deals

Cheapest flight	$946

Flight from Sofia to Ontario

When to book flights from Sofia to Ontario

Are your dates flexible? Find out the best times to travel from Sofia to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which airports can I use when flying from Sofia to Ontario?
Flights from Sofia to Ontario usually depart from Sofia (SOF) and arrive at Ontario (ONT).
What popular places can I visit in Ontario?
Some of the most popular sights in Ontario are Ontario Convention Center, Ontario Mills and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.
Do I need a passport to fly from Sofia to Ontario?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
Have flight prices from Sofia to Ontario changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,043 to $3,677. That means the highest observed fare was about 4x higher than the lowest one.
What is the time difference between Sofia and Ontario?
Ontario is 10 hours behind Sofia (Pacific Time vs Eastern European Time). Plan for the time shift when scheduling connections or first-day activities.
What car rental options are available at Ontario Airport (ONT)?
Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:
· Fox
· Thrifty
· Europcar
· Dollar
· Alamo

If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.
- Azure Hotel & Suites, Trademark Collection by Wyndham
- La Quinta Inn & Suites by Wyndham Ontario Airport
- Holiday Inn Ontario Airport By IHG

More options for your flight from Sofia to Ontario

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SOF - ONT

$946 Find Cheap Flights from Sofia to Ontario - Compare and Save

Everything you should know

Cheap Flights from Sofia to Ontario (SOF-ONT)

Recent round-trip flight deals from Sofia to Ontario

Recent one-way flight deals from Sofia to Ontario

Price, demand and travel trends for Sofia to Ontario flights

What is the cheapest airline to fly from Sofia to Ontario?

Key details for Sofia to Ontario flights

Cheapest flight

When to book flights from Sofia to Ontario

Your Sofia to Ontario flight questions, answered

Your guide to booking Sofia to Ontario flights

More options for your flight from Sofia to Ontario

Complete your trip to Ontario with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from Sofia to Ontario

Find direct flights to and from Sofia and Ontario

Flights from domestic origins to Ontario

Flights to other popular destinations