HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Sofia

$337+ Cheap flights from Washington 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
Aug 7 — Aug 141
Thu 8/7
Thu 8/14
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to Sofia 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.

Cheap flight deals from Washington to Sofia

Keep the following information in mind while searching for Washington to Sofia flight deals. Data was last updated August 2, 2025.

Round-trip from

$599
(oojo)

One-way from

$337
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$942
From Washington to Sofia
Search Deals
One-way flight from Washington to Sofia
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($151 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from Washington to Sofia

Cheapest flights from Washington to Sofia
Explore the most affordable flight options available from Washington to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 2, 2025.

This oojo deal was found by Cheapflights users on 7/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/87:10 pmSEA - SOF
1 stop15h 15mTurkish Airlines
Wed 10/223:35 pmSOF - SEA
1 stop35h 40mTurkish Airlines
Deal found 7/30$599
This FlightHub deal was found by Cheapflights users on 7/30. 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.
Wed 10/86:50 pmSEA - SOF
1 stop18h 10mLufthansa
Wed 10/226:15 amSOF - SEA
2 stops18h 01mLufthansa
Deal found 7/30$670
This Ovago deal was found by Cheapflights users on 8/1. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/303:00 pmSEA - SOF
2 stops19h 40mBritish Airways
Mon 11/35:25 pmSOF - SEA
2 stops35h 49mBritish Airways
Deal found 8/1$688
This Booking.com deal was found by Cheapflights users on 7/31. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:00 amSEA - SOF
2 stops25h 00mMultiple Airlines
Fri 1/96:15 amSOF - SEA
1 stop15h 55mMultiple Airlines
Deal found 7/31$749
This Travelocity deal was found by Cheapflights users on 7/31. 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.
Mon 12/297:00 amSEA - SOF
2 stops30h 55mAustrian Airlines
Fri 1/96:45 pmSOF - SEA
2 stops37h 44mAustrian Airlines
Deal found 7/31$756
This United Airlines deal was found by Cheapflights users on 8/1. 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 12/298:00 amSEA - SOF
2 stops19h 10mUnited Airlines
Fri 1/96:15 amSOF - SEA
2 stops23h 55mUnited Airlines
Deal found 8/1$815
This Gurufare deal was found by Cheapflights users on 7/31. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/129:47 amPDX - SOF
2 stops22h 03mLufthansa
Tue 8/192:00 pmSOF - PDX
2 stops40h 37mLufthansa
Deal found 7/31$963
This United Airlines deal was found by Cheapflights users on 8/1. 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.
Tue 8/126:15 amPDX - SOF
2 stops21h 05mUnited Airlines
Tue 8/1912:45 pmSOF - PDX
2 stops22h 00mUnited Airlines
Deal found 8/1$974
This Booking.com deal was found by Cheapflights users on 8/1. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/113:25 pmPDX - SOF
2 stops17h 15mMultiple Airlines
Mon 8/256:40 pmSOF - PDX
2 stops33h 51mMultiple Airlines
Deal found 8/1$975
This Air Canada deal was found by Cheapflights users on 8/1. 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.
Tue 8/126:15 amPDX - SOF
2 stops25h 35mAir Canada
Tue 8/196:00 amSOF - PDX
3 stops22h 46mAir Canada
Deal found 8/1$1,045
This Bravofly deal was found by Cheapflights users on 8/1. 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1111:59 pmPDX - SOF
2 stops34h 41mBritish Airways
Mon 8/258:00 pmSOF - PDX
1 stop31h 35mBritish Airways
Deal found 8/1$1,209

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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 August 2, 2025.
Use the filters below to find and compare flights from Washington to Sofia that are best for you.

Fly from

Washington

Fly to

Sofia

Route

Depart

Return

Price

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 10/8

7:10 pm-8:25 pm

1 stop15h 15m

Sofia

Wed 10/22

3:35 pm-5:15 pm

1 stop35h 40m

$599

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 10/8

6:50 pm-11:00 pm

1 stop18h 10m

Sofia

Wed 10/22

6:15 am-2:16 pm

2 stops18h 01m

$670

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 9/30

3:00 pm-8:40 pm

2 stops19h 40m

Sofia

Mon 11/3

5:25 pm-7:14 pm

2 stops35h 49m

$688

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 12/29

7:00 am-6:00 pm

2 stops25h 00m

Sofia

Fri 1/9

6:15 am-12:10 pm

1 stop15h 55m

$749

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 12/29

7:00 am-11:55 pm

2 stops30h 55m

Sofia

Fri 1/9

6:45 pm-10:29 pm

2 stops37h 44m

$756

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 12/29

8:00 am-1:10 pm

2 stops19h 10m

Sofia

Fri 1/9

6:15 am-8:10 pm

2 stops23h 55m

$815

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 8/12

9:47 am-5:50 pm

2 stops22h 03m

Sofia

Tue 8/19

2:00 pm-8:37 pm

2 stops40h 37m

$963

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 8/12

6:15 am-1:20 pm

2 stops21h 05m

Sofia

Tue 8/19

12:45 pm-12:45 am

2 stops22h 00m

$974

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 8/12

6:15 am-5:50 pm

2 stops25h 35m

Sofia

Tue 8/19

6:00 am-6:46 pm

3 stops22h 46m

$1,045

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 8/12

7:25 pm-8:40 pm

1 stop15h 15m

Sofia

Tue 8/19

10:10 am-10:04 pm

2 stops21h 54m

$1,322

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/1

Showing 1-10 of 21 results
1
2
3

Best time to book a flight from Washington to Sofia

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

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

Find hourly flight availability from Washington 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 August 2, 2025.

When flying from State of Washington 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.

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 August 2, 2025.
Read reviews from past customers who have flown KLM, Austrian Airlines, and United Airlines from Washington to Sofia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,384 reviews

Crew

8.4

Boarding

7.8

Comfort

7.7

Food

7.3

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,384 reviews
KLM
7.8
Good
1,384 reviews

Crew

8.4

Boarding

7.8

Comfort

7.7

Food

7.3

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Austrian Airlines
7.6
Good
823 reviews
KLM
7.8
Good
1,384 reviews

Crew

8.4

Boarding

7.8

Comfort

7.7

Food

7.3

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
United Airlines
7.4
Good
8,904 reviews
KLM
7.8
Good
1,384 reviews

Crew

8.4

Boarding

7.8

Comfort

7.7

Food

7.3

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Turkish Airlines
7.3
Good
3,935 reviews
KLM
7.8
Good
1,384 reviews

Crew

8.4

Boarding

7.8

Comfort

7.7

Food

7.3

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Air Canada
7.1
Good
9,855 reviews
KLM
7.8
Good
1,384 reviews

Crew

8.4

Boarding

7.8

Comfort

7.7

Food

7.3

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

Find useful and relevant information for your journey from Washington 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 Washington?

    Located just 4.2 mi from the city center, Sofia (SOF) is the airport most travelers will use when flying to Sofia from Washington.

  • What are the cheapest airlines to fly from State of Washington to Sofia one-way?

    $464 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on United Airlines and British Airways, with prices starting from $465 and $507, respectively.

  • What are the most popular routes from State of Washington to Sofia?

    When deciding which route to take from State of Washington to Sofia consider Seattle/Tacoma Intl - Sofia, Portland - Sofia or Spokane - Sofia as they are the most popular.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Sofia?

    Currently, November is the cheapest month in which you can book a flight from State of Washington to Sofia (average of $632). Flying from State of Washington to Sofia in June is currently the most expensive (average of $1,187). 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 Washington to Sofia

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Sofia flights
O'Hare Intl to Sofia flights
Newark to Sofia flights
LaGuardia to Sofia flights
Boston to Sofia flights
Los Angeles to Sofia flights
San Francisco to Sofia flights
Dulles Intl to Sofia flights
Atlanta to Sofia flights
Reagan-National to Sofia flights
Salt Lake City to Sofia flights
Dallas/Fort Worth to Sofia flights
Seattle to Sofia flights
Minneapolis to Sofia flights
Miami to Sofia flights
Sky Harbor Intl to Sofia flights
Midway to Sofia flights
Baltimore to Sofia flights
Hobby to Sofia flights
Love Field to Sofia flights
Charlotte to Sofia flights
San Diego to Sofia flights
George Bush Intcntl to Sofia flights
Las Vegas to Sofia flights
Philadelphia to Sofia flights
Sacramento to Sofia flights
Denver to Sofia flights
Tampa to Sofia flights
Orlando to Sofia flights
Detroit to Sofia flights
Indianapolis to Sofia flights
Pensacola to Sofia flights
Lexington to Sofia flights
Boise to Sofia flights
Austin to Sofia flights
Raleigh to Sofia flights
San Jose to Sofia flights
Nashville to Sofia flights
Providence to Sofia flights
Anchorage to Sofia flights
Norfolk to Sofia flights
Santa Ana to Sofia flights
Albuquerque to Sofia flights
South Bend to Sofia flights
Oakland to Sofia flights
West Palm Beach to Sofia flights
Rochester to Sofia flights
Kansas City to Sofia flights

Top 4 airlines flying from Washington to Sofia

Discover the top 4 airlines that operate flights from Washington 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 August 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$609Average$806FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$653Average$1,049FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$664Average$955FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$674Average$956FlexibilityNo cancel feeOn-time76%

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.