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$274+ Cheap flights from Riverside, CA to Sofia (SOF)

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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — SOF
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Riverside to Sofia are usually found in February or November, booked 62 days in advance, depart on a Monday or Tuesday and return on a Wednesday

Cheap flight deals from Riverside to Sofia

Keep the following information in mind while searching for Riverside to Sofia flight deals. Data was last updated September 15, 2025.

Round-trip from

$584
(Cheapflightsfares)

One-way from

$274
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$727
From Riverside to Sofia
Search Deals
One-way flight from Riverside to Sofia
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Highest demand for flights based on searches. 21% potential increase in price ($227 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($43 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Riverside to Sofia

Cheapest flights from Riverside to Sofia
Explore the most affordable flight options available from Riverside to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/61:00 pmLAX - SOF
1 stop26h 30mMultiple Airlines
Thu 11/208:15 pmSOF - LAX
2 stops58h 10mMultiple Airlines
Deal found 9/14$584
This FlightHub deal was found by Cheapflights users on 9/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/137:55 pmLAX - SOF
1 stop38h 30mTurkish Airlines
Mon 10/209:15 pmSOF - LAX
1 stop30h 45mTurkish Airlines
Deal found 9/14$589
This FlightHub deal was found by Cheapflights users on 9/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/277:55 pmLAX - SOF
1 stop32h 50mTurkish Airlines
Wed 10/19:15 pmSOF - LAX
1 stop24h 30mTurkish Airlines
Deal found 9/14$598
This Gotogate deal was found by Cheapflights users on 9/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/146:00 amLAX - SOF
2 stops25h 50mMultiple Airlines
Tue 10/286:00 amSOF - LAX
1 stop17h 05mMultiple Airlines
Deal found 9/13$600
This United Airlines deal was found by Cheapflights users on 9/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/65:30 pmLAX - SOF
1 stop19h 15mUnited Airlines
Thu 11/206:00 amSOF - LAX
2 stops24h 50mUnited Airlines
Deal found 9/14$601
This Cheapflightsfares deal was found by Cheapflights users on 9/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/262:15 pmLAX - SOF
2 stops22h 30mLufthansa
Fri 1/166:10 amSOF - LAX
1 stop16h 55mLufthansa
Deal found 9/13$603
This Travelocity deal was found by Cheapflights users on 9/14. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/77:35 pmLAX - SOF
1 stop28h 30mMultiple Airlines
Tue 10/146:20 amSOF - LAX
2 stops25h 08mMultiple Airlines
Deal found 9/14$604
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/288:20 amLAX - SOF
2 stops23h 55mAir Canada
Fri 12/126:10 amSOF - LAX
2 stops24h 58mAir Canada
Deal found 9/13$605
This United Airlines deal was found by Cheapflights users on 9/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/262:15 pmLAX - SOF
2 stops22h 30mUnited Airlines
Thu 1/156:00 amSOF - LAX
1 stop17h 05mUnited Airlines
Deal found 9/14$610
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/276:30 amLAX - SOF
2 stops21h 55mAir Canada
Mon 11/102:20 pmSOF - LAX
2 stops30h 12mAir Canada
Deal found 9/13$612

Cheapflights Fare Finder

 
Customize your flight search to find flights from Riverside to Sofia 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 September 15, 2025.
Use the filters below to find and compare flights from Riverside to Sofia that are best for you.

Fly from

Riverside

Fly to

Sofia

Route

Depart

Return

Price

Los AngelesSofia

LAX - SOF

LAXSOF

Los Angeles

Wed 3/4

2:08 pm-6:20 pm

2 stops18h 12m

Sofia

Mon 3/16

7:05 pm-2:05 pm

2 stops28h 00m

$584

Los AngelesSofia

LAX - SOF

LAXSOF

Los Angeles

Sun 1/11

12:30 am-1:25 pm

2 stops26h 55m

Sofia

Mon 1/26

2:20 pm-7:27 pm

2 stops39h 07m

$586

Los AngelesSofia

LAX - SOF

LAXSOF

Los Angeles

Thu 1/15

3:30 pm-11:15 am

1 stop33h 45m

Sofia

Mon 1/19

5:25 pm-1:30 pm

1 stop30h 05m

$598

Los AngelesSofia

LAX - SOF

LAXSOF

Los Angeles

Thu 11/6

5:30 pm-10:45 pm

1 stop19h 15m

Sofia

Thu 11/20

6:00 am-8:50 pm

2 stops24h 50m

$601

Los AngelesSofia

LAX - SOF

LAXSOF

Los Angeles

Thu 3/12

6:30 pm-10:45 pm

1 stop19h 15m

Sofia

Thu 3/26

6:00 am-11:44 am

2 stops38h 44m

$602

Los AngelesSofia

LAX - SOF

LAXSOF

Los Angeles

Thu 3/12

6:30 pm-10:45 pm

1 stop19h 15m

Sofia

Thu 3/26

6:00 am-8:50 pm

2 stops23h 50m

$602

Los AngelesSofia

LAX - SOF

LAXSOF

Los Angeles

Fri 1/16

5:30 pm-6:20 pm

1 stop14h 50m

Sofia

Fri 1/30

6:10 am-8:50 pm

2 stops24h 40m

$602

Los AngelesSofia

LAX - SOF

LAXSOF

Los Angeles

Sun 1/11

8:15 am-6:20 pm

2 stops24h 05m

Sofia

Sun 1/25

6:10 am-6:01 pm

2 stops21h 51m

$603

Los AngelesSofia

LAX - SOF

LAXSOF

Los Angeles

Tue 1/13

8:40 am-10:45 pm

2 stops28h 05m

Sofia

Tue 1/27

6:00 am-1:05 pm

1 stop17h 05m

$605

Los AngelesSofia

LAX - SOF

LAXSOF

Los Angeles

Sun 11/2

4:10 pm-10:45 pm

2 stops20h 35m

Sofia

Sun 11/16

6:10 am-11:48 am

2 stops39h 38m

$605

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 19 results
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Best time to book a flight from Riverside to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Riverside 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 Riverside to Sofia

How far ahead should I book a flight from Riverside to Sofia?

Use this chart to determine the optimal time to book a round-trip flight from Riverside to Sofia. Price data was last updated on September 12, 2025.

To ensure you get the cheapest price possible for a flight from Riverside to Sofia, you should look to book at least 62 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Riverside to Sofia?

Currently, November is the cheapest month in which you can book a flight from Riverside to Sofia (average of $632). Flying from Riverside to Sofia in June is currently the most expensive (average of $1,185). 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.

What is the cheapest time of day to fly from R1V to SOF?

Find hourly flight availability from Riverside to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from Riverside to Sofia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Riverside to Sofia?

Use this chart to determine the cheapest time to fly round-trip from Riverside to Sofia. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Riverside to Sofia flight should consider departing on Monday evenings when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated September 15, 2025.
Read reviews from past customers who have flown Austrian Airlines, United Airlines, and Turkish Airlines from Riverside to Sofia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.6
Good
850 reviews

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
Austrian Airlines
7.6
Good
850 reviews
Austrian Airlines
7.6
Good
850 reviews

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
United Airlines
7.4
Good
8,929 reviews
Austrian Airlines
7.6
Good
850 reviews

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
Turkish Airlines
7.3
Good
3,968 reviews
Austrian Airlines
7.6
Good
850 reviews

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
Lufthansa
6.8
Okay
7,407 reviews
Austrian Airlines
7.6
Good
850 reviews

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
British Airways
6.7
Okay
7,361 reviews
Austrian Airlines
7.6
Good
850 reviews

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.

Related info for your journey

Find useful and relevant information for your journey from Riverside to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sofia from Riverside?

    If you book a flight to Sofia from Riverside, you will be flying to Sofia, which is the city’s only airport. Sofia (SOF) is located 4.2 mi from the center of Sofia. There are 0 flights from Riverside to Sofia per day from 8 different airlines.

  • How long is the flight from Riverside to Sofia?

    Departing from Riverside to Sofia will take you 18h 12m. Airlines will cover a distance of 6613 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Riverside to Sofia that include hotel bookings?

    Yes. In addition to deals on Riverside to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Riverside to Sofia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Riverside to Sofia.

  • Can I find deals for business class flights from Riverside to Sofia?

    Yes. Cheapflights offers flight deals from Riverside to Sofia 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 Riverside to Sofia?

    Currently, November is the cheapest month in which you can book a flight from Riverside to Sofia (average of $632). Flying from Riverside to Sofia in June is currently the most expensive (average of $1,185). 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

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Top 8 airlines flying from Riverside to Sofia

Discover the top 8 airlines that operate flights from Riverside to Sofia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
ITA AirwaysCheapest$530Average$1,288FlexibilityNo cancel feeOn-time81%
LOTCheapest$535Average$1,050FlexibilityNo cancel feeOn-time81%
Turkish AirlinesCheapest$578Average$707FlexibilityNo cancel feeOn-time77%
KLMCheapest$588Average$820FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$610Average$842FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$641Average$966FlexibilityNo cancel feeOn-time70%
Austrian AirlinesCheapest$650Average$949FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$676Average$1,027FlexibilityNo cancel feeOn-time69%

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