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 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 $1,036 to $3,873. 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

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

United Airlines ($1,036) and British Airways ($1,148) are the cheapest airlines to fly round-trip from Sofia to Ontario according to KAYAK data over the last 5 days.

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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

Last minute

Recent round-trip flight deals from Sofia to Ontario

Wed, Nov 18 - Wed, Nov 25

6:25 am - 6:01 pmSOF Sofia-ONT Ontario

21h 36m2 stops Frankfurt am Main San Francisco

4:17 pm - 11:00 pmONT Ontario-SOF Sofia

20h 43m2 stops San Francisco Frankfurt am Main

$1,036United Airlines

Mon, Nov 16 - Sun, Nov 22

6:25 am - 8:51 pmSOF Sofia-ONT Ontario

24h 26m2 stops Frankfurt am Main Denver Intl

7:00 am - 1:15 pmONT Ontario-SOF Sofia

20h 15m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

$1,040United Airlines

Mon, Nov 16 - Wed, Nov 25

6:25 am - 8:51 pmSOF Sofia-ONT Ontario

24h 26m2 stops Frankfurt am Main Denver Intl

7:00 am - 1:25 pmONT Ontario-SOF Sofia

20h 25m2 stops Chicago O'Hare Intl Frankfurt am Main

$1,041United Airlines

Sat, Nov 14 - Tue, Dec 1

7:55 am - 6:47 pmSOF Sofia-ONT Ontario

20h 52m2 stops Vienna Intl Chicago O'Hare Intl

4:17 pm - 11:00 pmONT Ontario-SOF Sofia

20h 43m2 stops San Francisco Frankfurt am Main

$1,046United Airlines

Sun, Nov 8 - Mon, Nov 23

7:45 pm - 6:42 pmSOF Sofia-ONT Ontario

32h 57m2 stops London Heathrow Dallas/Fort Worth

11:59 pm - 8:10 pmONT Ontario-SOF Sofia

34h 11m2 stops Dallas/Fort Worth London Heathrow

$1,148British Airways

Tue, Dec 22 - Fri, Jan 1

2:00 pm - 10:53 pmSOF Sofia-ONT Ontario

18h 53m2 stops Munich Franz Josef Strauss San Francisco

4:00 pm - 11:00 pmONT Ontario-SOF Sofia

21h 00m2 stops San Francisco Frankfurt am Main

$1,214United Airlines

Sun, Nov 8 - Mon, Nov 23

10:00 pm - 7:30 pmSOF Sofia-ONT Ontario

31h 30m3 stops Madrid Barajas Lisbon Humberto Delgado San Francisco

10:55 am - 8:55 pmONT Ontario-SOF Sofia

24h 00m3 stops Las Vegas Harry Reid Intl San Francisco Istanbul

$1,366Multiple Airlines

Fri, Apr 16 - Thu, Apr 29

2:15 pm - 11:46 pmSOF Sofia-ONT Ontario

19h 31m2 stops London Heathrow Dallas/Fort Worth

7:30 am - 1:25 pmONT Ontario-SOF Sofia

19h 55m2 stops Dallas/Fort Worth London Heathrow

$1,376British Airways

Sat, Nov 21 - Fri, Dec 4

9:30 am - 11:31 pmSOF Sofia-ONT Ontario

24h 01m2 stops Istanbul Seattle/Tacoma Intl

11:57 am - 8:50 pmONT Ontario-SOF Sofia

22h 53m2 stops Seattle/Tacoma Intl Istanbul

$1,442Multiple Airlines

Thu, Nov 12 - Wed, Nov 18

9:45 pm - 11:06 pmSOF Sofia-ONT Ontario

35h 21m2 stops Istanbul Seattle/Tacoma Intl

6:00 am - 8:55 pmONT Ontario-SOF Sofia

28h 55m2 stops Seattle/Tacoma Intl Istanbul

$1,503Multiple 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 with more confidence.

Which airline is the cheapest to fly from Sofia to Ontario?: United Airlines ($1,036) and British Airways ($1,148) 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	$859

One-way 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.

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 $1,036 to $3,873. That means the highest observed fare was about 4x higher than the lowest one.
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
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 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 popular places can I visit in Ontario?
Some of the most popular sights in Ontario are Ontario Convention Center and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.

• Ontario Airport Inn
• Azure Hotel & Suites, Trademark Collection by Wyndham
• La Quinta Inn & Suites by Wyndham Ontario Airport

More options for your flight from Sofia to Ontario

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SOF - ONT

$859 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

Recent last minute flight deals from Sofia to Ontario

Price, demand and travel trends for Sofia to Ontario flights

Which airline is the cheapest 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